USG CORP
10-K405, 1999-03-01
CONCRETE, GYPSUM & PLASTER PRODUCTS
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- - --------------------------------------------------------------------------------



                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549
                                -----------------

                                    FORM 10-K
                                -----------------

(Mark One)

   X
- - ------- ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE
        ACT OF 1934 (FEE REQUIRED)
                            For fiscal year ended  December 31, 1998

                                       OR

- - ------- TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES
        EXCHANGE ACT OF 1934 (NO FEE REQUIRED)
           For the transition period from            to           .
                                          ----------    ----------

                          Commission File Number 1-8864
                                 USG CORPORATION
             (Exact name of Registrant as Specified in its Charter)

               Delaware                                          36-3329400
   (State or Other Jurisdiction of                           (I.R.S. Employer
    Incorporation or Organization)                           Identification No.)

 125 S. Franklin Street, Chicago, Illinois                  60606-4678
  (Address of Principal Executive Offices)                  (Zip Code)

       Registrant's Telephone Number, Including Area Code: (312) 606-4000


                            -------------------------


           Securities Registered Pursuant to Section 12(b) of the Act:

                                                        Name of Exchange on
       Title of Each Class                                Which Registered
       -------------------                                ----------------

                                                        New York Stock Exchange
   Common Stock, $0.10 par value                        Chicago Stock Exchange
   -------------------------------                      -----------------------

                                                        New York Stock Exchange
   Preferred Share Purchase Rights                      Chicago Stock Exchange
   -------------------------------                      -----------------------


   8.5% Senior Notes, Due 2005                          New York Stock Exchange
   ---------------------------                          -----------------------



           Securities Registered Pursuant to Section 12(g) of the Act:
                                      None
- - --------------------------------------------------------------------------------



                                (Title of Class)
Indicate by check mark whether the registrant (1) has filed all reports required
to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during
the  preceding 12 months (or for such  shorter  period that the  registrant  was
required  to file  such  reports),  and  (2) has  been  subject  to such  filing
requirements for the past 90 days. Yes   X   No
                                       -----    -----

Indicate by check mark if disclosure of delinquent  filers  pursuant to Item 405
of Regulation  S-K is not contained  herein,  and will not be contained,  to the
best of registrant's  knowledge,  in definitive proxy or information  statements
incorporated by reference in Part III of this Form 10-K or any amendment to this
Form 10-K.   X
           -----

Indicate  by check mark  whether  the  registrant  has filed all  documents  and
reports  required  to be  filed by  Section  12,  13 or 15(d) of the  Securities
Exchange Act of 1934 subsequent to the  distribution of securities  under a plan
confirmed by a court. Yes   X   No
                          -----    -----

As of January 31, 1999,  the aggregate  market value of USG  Corporation  common
stock held by  nonaffiliates  (based  upon the New York Stock  Exchange  closing
prices) was approximately $ 2,777,084,000.  As of January 31, 1999,  49,570,627,
shares of common stock were outstanding.


                       DOCUMENTS INCORPORATED BY REFERENCE


1.  Portions  of the  Corporation's  1998  Annual  Report  to  Stockholders  are
incorporated by reference in Parts I, II and IV of this Form 10-K Report.

2. The  Corporation's  definitive Proxy Statement for use in connection with the
annual meeting of  stockholders  to be held on May 12, 1999, is  incorporated by
reference in Part III of this Form 10-K Report.

3. A list of exhibits  incorporated  by reference is presented in this Form 10-K
Report beginning on page 13.
<TABLE>

                                TABLE OF CONTENTS
<CAPTION>
<S>           <C>                                                                                              <C>

PART I                                                                                                         Page
Item   1.     Business........................................................................................    3
Item   2.     Properties......................................................................................    8
Item   3.     Legal Proceedings...............................................................................    9
Item   4.     Submission of Matters to a Vote of Security Holders.............................................    9

PART II
Item   5.     Market for the Registrant's Common Stock and Related Stockholder Matters........................   10
Item   6.     Selected Financial Data.........................................................................   10
Item   7.     Management's Discussion and Analysis of Results of Operations and Financial Condition...........   10
Item   8.     Financial Statements and Supplementary Data.....................................................   10
Item   9.     Changes in and Disagreements with Accountants on Accounting and Financial Disclosure............   10

PART III
Item  10.     Directors and Executive Officers of the Registrant..............................................   11
Item  11.     Executive Compensation..........................................................................   13
Item  12.     Security Ownership of Certain Beneficial Owners and Management..................................   13
Item  13.     Certain Relationships and Related Transactions..................................................   13

PART IV
Item  14.     Exhibits, Financial Statement Schedules and Reports on Form 8-K.................................   13

Signatures....................................................................................................   20
</TABLE>

                                     PART I


Item 1.  BUSINESS

General

United States Gypsum  Company  ("U.S.  Gypsum") was  incorporated  in 1901.  USG
Corporation (together with its subsidiaries,  called "USG" or the "Corporation")
was  incorporated  in Delaware on October 22, 1984. By a vote of stockholders on
December  19,  1984,  U.S.  Gypsum  became  a  wholly  owned  subsidiary  of the
Corporation,  and the stockholders of U.S. Gypsum became the stockholders of the
Corporation, all effective January 1, 1985.

Through its  subsidiaries,  USG is a leading  manufacturer  and  distributor  of
building  materials   producing  a  wide  range  of  products  for  use  in  new
residential, new nonresidential and repair and remodel construction,  as well as
products used in certain industrial processes.

Following the completion of a financial  restructuring  in 1993, USG was engaged
in a financial  strategy of reducing  debt and growing its gypsum,  ceilings and
distribution businesses through a balanced application of free cash flow between
debt reduction and capital expenditures. This strategy had the dual objective of
reaching a target debt level of $650  million  and  achieving  investment  grade
status with respect to its senior  public debt issues  within five years.  These
objectives were achieved when USG reached its target debt level in October 1997,
Standard & Poor's raised its rating of USG's debt to BBB in December  1997,  and
Moody's raised its rating of USG's debt to Baa3 in March 1998.

USG is currently focused on building long-term  stockholder value through a plan
designed to provide  immediate  returns to investors through dividends and share
repurchases and future returns from earnings growth. In 1998, USG paid its first
quarterly cash dividend in 10 years.  USG also initiated a share repurchase plan
that contemplates buying back up to 5 million shares,  which is about 10% of its
current shares outstanding, over the next several years. USG's plan for earnings
growth  includes  introducing  new  products  and product  platforms,  improving
service,  strengthening  its brands,  adding capacity to serve growing customers
and  markets,  renovating  manufacturing  capacity  to make  USG the  undisputed
low-cost producer, and expanding  distribution.  These initiatives are supported
by the financial flexibility of an investment grade capital structure.

USG's  operations  are organized  into two operating  segments:  North  American
Gypsum and Worldwide Ceilings.


North American Gypsum

Business

North  American  Gypsum,  which  manufactures  and  markets  gypsum and  related
products in the United States,  Canada and Mexico,  includes U.S. Gypsum and L&W
Supply  Corporation ("L&W Supply") in the United States,  the gypsum business of
CGC Inc. ("CGC") in Canada,  and Yeso Panamericano S.A. de C.V. in Mexico.  U.S.
Gypsum is the largest  producer  of gypsum  wallboard  in the United  States and
accounted for nearly one-third of total domestic gypsum wallboard sales in 1998.
L&W  Supply is the  country's  largest  distributor  of  wallboard  and  related
products and in 1998  distributed  approximately  10% of all gypsum wallboard in
the  United  States  (including  approximately  27% of U.S.  Gypsum's  wallboard
production). CGC is the largest producer of gypsum wallboard in eastern Canada.

Products

North American Gypsum  manufactures and markets building and industrial products
used in a variety of applications.  Gypsum panel products are used to finish the
interior  walls  and  ceilings  in  residential,  commercial  and  institutional
construction.  These products provide aesthetic as well as  sound-dampening  and
fire-retarding  value.  The  majority  of  these  products  are sold  under  the
SHEETROCK  brand  name.  Also sold under the  SHEETROCK  brand name is a line of
joint compounds used for finishing  wallboard joints.  The DUROCK line of cement
board  and  accessories  provides   fire-resistant  and   water-damage-resistant
assemblies for both interior and exterior construction.  In 1998, USG launched a
new product  platform:  FIBEROCK  brand gypsum fiber  panels.  This product line
currently  includes  abuse-  resistant wall panels and floor  underlayment.  The
Corporation  produces  a variety of  plaster  products  used to provide a custom
finish for residential and commercial interiors. Like SHEETROCK brand wallboard,
these products provide  aesthetic,  sound-dampening  and  fire-retarding  value.
Plaster  products  are sold  under  the  trade  names of RED TOP,  IMPERIAL  and
DIAMOND.  The Corporation also produces  gypsum-based  products for agricultural
and  industrial  customers to use in a number of  applications,  including  soil
conditioning, road repair, fireproofing and ceramics.

Manufacturing

North  American   Gypsum's  products  are  manufactured  at  45  plants  located
throughout the United States and Canada and in central  Mexico.  As a major part
of USG's earnings growth strategy,  U.S. Gypsum is replacing high-cost wallboard
capacity with new, low-cost plants. These projects also will add a net 2 billion
square feet of capacity to serve  growing  markets and customers in five regions
of the United States. In the Southeast,  U.S. Gypsum is building a new wallboard
and joint compound plant in Bridgeport,  Ala.,  that is scheduled for startup in
the second  quarter  of 1999.  In the  Midwest,  the  company is  building a new
wallboard  production line at its East Chicago,  Ind.,  plant, that is scheduled
for startup in the fourth quarter of 1999. In the Northeast,  U.S.  Gypsum broke
ground in 1998 on a new wallboard  plant in Aliquippa,  Pa.,  which is scheduled
for startup in 2000. In September 1998, the company announced two projects,  one
in the  Northwest,  a new  wallboard  plant  in  Ranier,  Ore.,  and  one in the
Southwest,  a modernization of its Plaster City,  Calif.,  plant. The latter two
facilities  are  expected to be fully  operational  in 2001.  Construction  also
continues on a facility to manufacture FIBEROCK brand gypsum fiber panels at the
Gypsum, Ohio, wallboard plant. This new production line is scheduled for startup
in the third quarter of 1999 and will complement the gypsum fiber panel plant in
Port Hawkesbury, Nova Scotia, which was acquired in 1997.

Gypsum  rock is mined or quarried at 13  company-owned  locations  in the United
States and Canada. In 1998, these facilities  provided  approximately 88% of the
gypsum  used by the  Corporation's  plants  in  North  America.  Certain  plants
purchase  synthetic  gypsum or natural gypsum rock from various outside sources.
Outside  purchases  accounted  for 12% of the gypsum  used in the  Corporation's
North American plants.  The Corporation's  geologists  estimate that recoverable
rock reserves are  sufficient  for more than 30 years of operation  based on the
Corporation's  average  annual  production  of crude gypsum during the past five
years.  Proven  reserves  contain  approximately  194  million  tons,  of  which
approximately 66% are located in the United States and 34% in Canada. Additional
reserves of approximately  153 million tons are found on three properties not in
operation.  The Corporation's total average annual production of crude gypsum in
the United States and Canada during the past five years was 10.1 million tons.

The  Corporation  owns and operates  seven paper mills located across the United
States.   Vertical   integration  in  paper  ensures  a  continuous   supply  of
high-quality  paper that is tailored to the  specific  needs of USG's  wallboard
production processes.

The Corporation does research and development at the USG Research and Technology
Center in  Libertyville,  Ill.  The staff at this  center  provides  specialized
technical  services to the operating units and does product and process research
and development.  The center is especially  well-equipped for carrying out fire,
acoustical,  structural and  environmental  evaluations of products and building
assemblies.  The center also has an analytical  laboratory for chemical analysis
and  characterization of materials.  Development  activities can be taken to the
pilot plant level before being transferred to a full-size plant.

Marketing and Distribution

Distribution is carried out through L&W Supply, building materials dealers, home
improvement  centers and other  retailers,  contractors and specialty  wallboard
distributors. Sales of gypsum products are seasonal to the extent that sales are
generally  greater  from  spring  through  the middle of autumn  than during the
remaining part of the year. Based on the Corporation's  estimates using publicly
available data,  internal surveys,  and gypsum wallboard  shipment data from the
Gypsum  Association,  management  estimates that during 1998, about 45% of total
industry  volume demand for gypsum  wallboard  was generated by new  residential
construction  activity,  38% of volume demand was generated by  residential  and
nonresidential  repair and remodel activity,  10% of volume demand was generated
by new  nonresidential  construction  activity  and the  remaining  7% of volume
demand  was  generated  by  other  activities  such  as  exports  and  temporary
construction.

L&W  Supply,  which was  organized  in 1971 by U.S.  Gypsum,  currently  has 187
distribution locations in 36 states. It is a service-oriented  organization that
stocks a wide range of construction  materials and delivers  less-than-truckload
quantities  of  construction  materials  to a job site and places  them in areas
where work is being done,  thereby reducing or eliminating the need for handling
by  contractors.  Although  L&W Supply  specializes  in  distribution  of gypsum
wallboard (which accounts for approximately  50% of its total net sales),  joint
compound  and other  products  manufactured  primarily by U.S.  Gypsum,  it also
distributes  products  manufactured by USG Interiors such as acoustical  ceiling
tile and grid,  as well as products  of other  manufacturers  including  drywall
metal,  insulation,   roofing  products  and  accessories.   L&W  Supply  leases
approximately 86% of its facilities from third parties.  Usually, initial leases
run from three to five years with a five-year renewal option.

Competition

The  Corporation  competes in North  America as the largest of 13  producers  of
gypsum  wallboard  products and in 1998 accounted for nearly  one-third of total
gypsum  wallboard  sales in the United States.  In 1998, U.S. Gypsum shipped 8.8
billion  square  feet of  wallboard,  the  highest  level  in the  Corporation's
history,  out of total U.S. industry shipments  (including imports) estimated at
28.2 billion  square feet,  also a record.  Principal  competitors in the United
States are: National Gypsum Company,  Georgia-Pacific Corporation,  James Hardie
Gypsum,  The Celotex  Corporation,  Temple- Inland Forest Products  Corporation,
American Gypsum and several smaller, regional competitors.  Major competitors in
Canada  include BPB  Westroc and  Georgia-Pacific  Corporation.  In Mexico,  the
Corporation's major competitor is Panel Rey.

L&W Supply's largest  competitor,  Gypsum  Management  Supply, is an independent
distributor  with locations in the southern,  central and western United States.
There are several regional  competitors,  such as,  GDMA/RINKER in the southeast
(primarily in Florida) and Strober  Building Supply in the  northeastern  United
States.  L&W Supply's many local  competitors  include lumber dealers,  hardware
stores, home improvement centers and acoustical tile distributors.


Worldwide Ceilings


Business

Worldwide  Ceilings,  which  manufactures  and markets interior systems products
worldwide,  includes USG Interiors,  Inc., ("USG Interiors"),  the international
interior systems business managed as USG International and the ceilings business
of CGC.  Worldwide  Ceilings is a leading supplier of interior ceilings products
used  primarily in  commercial  applications.  In 1998,  Worldwide  Ceilings was
estimated  to be the  largest  producer of ceiling  grid and the second  largest
producer of ceiling tile in the world.

Products

Worldwide  Ceilings   manufactures  and  markets  ceiling  grid,  ceiling  tile,
relocatable  wall systems  and, in Europe and the  Asia-Pacific  region,  access
floor systems.  USG's integrated line of ceilings  products  provides  qualities
such as sound absorption,  fire retardation,  and convenient access to the space
above the ceiling for electrical and mechanical  systems,  air  distribution and
maintenance.  USG  Interiors'  significant  trade names include the AURATONE and
ACOUSTONE  brands of ceiling tile and the DX, FINELINE,  CENTRICITEE,  CURVATURA
and DONN brands of ceiling grid.

Manufacturing

Worldwide  Ceilings'  products are  manufactured  at 20 plants  located in North
America,  Europe and  Asia-Pacific.  These  include 10 ceiling  grid  plants,  5
ceiling tile plants, 2 plants that produce other interior  products and 3 plants
that produce or prepare raw materials  for ceiling tile and grid.  Principal raw
materials used in the production of Worldwide Ceilings' products include mineral
fiber, steel, perlite, starch and high-pressure laminates.  Certain of these raw
materials  are  produced  internally,  while  others are  obtained  from various
outside  suppliers.  Shortages  of raw  materials  used in this  segment are not
expected.  In 1998, the replacement of two old production lines with one modern,
high-speed  line at USG  Interiors'  ceiling  tile plant in Cloquet,  Minn.  was
completed. This project will reduce manufacturing costs and add capacity to meet
increasing worldwide demand.

USG  Interiors'  primary  research  and  development  are  carried  out  at  the
Corporation's research and development center in Libertyville,  Ill., and at its
"Solutions  Center"SM in Chicago,  Ill. An additional metal forming research and
development  facility in Avon, Ohio,  provides  product design,  engineering and
testing services in addition to manufacturing development.

Marketing and Distribution

Worldwide  Ceilings'  products are sold primarily in markets  related to the new
construction and renovation of commercial buildings.  Marketing and distribution
are conducted through a network of distributors,  installation contractors,  L&W
Supply, and home improvement centers.



Competition

The Corporation  estimates that it is the  second-largest  producer/marketer  of
acoustical  ceiling  tile in the world.  Principal  global  competitors  include
Armstrong   World   Industries,    Inc.   (the   largest   manufacturer),    OWA
Faserplattenwerk  GmbH (Odenwald) and The Celotex  Corporation.  The Corporation
estimates that it is the world's largest manufacturer of ceiling grid. Principal
competitors  in ceiling  grid include WAVE (a joint  venture  between  Armstrong
World  Industries,   Inc.  and  Worthington  Industries)  and  Chicago  Metallic
Corporation.


Other Information


The Corporation's  plants are substantial users of energy. Five major fuel types
are used in a mix  consisting  of 79% natural gas, 10%  electricity,  7% oil, 2%
coke and 2% purchased hot air. With few exceptions,  plants that use natural gas
are equipped with fuel standby  systems,  principally oil. Primary fuel supplies
have been adequate,  and no  curtailment  of plant  operations has resulted from
insufficient  supplies.  Supplies are likely to remain  sufficient for projected
requirements.  Energy price swap agreements are used by the Corporation to hedge
the cost of certain purchased fuel.

Neither  operating  segment has any special working  capital  requirements or is
materially dependent on a single customer or a few customers on a regular basis.
No  single  customer  of the  Corporation  accounted  for  more  than 10% of the
Corporation's  1998 or 1997  consolidated  net sales.  Because orders are filled
upon receipt, neither operating segment has any significant backlog.

Loss of one or more of the patents or licenses held by the Corporation would not
have a major  impact on the  Corporation's  business  or its ability to continue
operations.  No material part of any of the Corporation's business is subject to
renegotiation  of profits or  termination  of contracts or  subcontracts  at the
election of the government.

All of the  Corporation's  products  regularly  require  improvement  to  remain
competitive.  The Corporation also develops and produces  comprehensive  systems
employing  several of its products.  In order to maintain its high standards and
remain a leader in the building  materials  industry,  the Corporation  performs
ongoing  extensive  research and development  activities and makes the necessary
capital  expenditures  to  maintain  production  facilities  in  good  operating
condition.

One of the Corporation's  subsidiaries,  U.S. Gypsum, is a defendant in asbestos
lawsuits  alleging  both  property  damage  and  personal  injury.   Information
pertaining to legal  proceedings  is included in "Notes to Financial  Statements
Note 15. Litigation" of the Corporation's 1998 Annual Report to Stockholders and
is incorporated herein by reference.

Financial  information  pertaining to operating  segments,  foreign and domestic
operations and export sales is included in "Notes to Financial Statements - Note
14.  Segments" of the  Corporation's  1998 Annual Report to stockholders  and is
incorporated herein by reference.

<PAGE>
Item 2.  PROPERTIES


The Corporation's plants, mines, quarries,  transport ships and other facilities
are located in North America, Europe and Asia-Pacific.  Many of these facilities
are  operating  at or  near  full  capacity.  The  locations  of the  production
properties of the Corporation's subsidiaries,  grouped by operating segment, are
as follows (plants are owned unless otherwise indicated):
<TABLE>
North American Gypsum
<CAPTION>

Gypsum Wallboard and Other Gypsum Products
<S>                                 <C>                                <C>
Baltimore, Md.                      Jacksonville, Fla.                 Southard, Okla.
Boston (Charlestown), Mass.         New Orleans, La.                   Sperry, Iowa
Detroit (River Rouge), Mich.        Norfolk, Va.                       Stony Point, N.Y.
East Chicago, Ind.                  Oakfield, N.Y.                     Sweetwater, Texas
Empire, Nev.                        Plaster City, Calif.               Hagersville, Ontario, Canada
Fort Dodge, Iowa                    Plasterco (Saltville), Va.         Montreal, Quebec, Canada
Fremont, Calif.                     Santa Fe Springs, Calif.           St. Jerome, Quebec, Canada (currently idle)
Galena Park, Texas                  Shoals, Ind.                       Puebla, Puebla, Mexico
Gypsum, Ohio                        Sigurd, Utah
</TABLE>

<TABLE>
<CAPTION>
Joint Compound (surface preparation and joint treatment products)
<S>                                 <C>                                <C>
Chamblee, Ga.                       Jacksonville, Fla.                 Montreal, Quebec, Canada
Dallas, Texas                       Port Reading, N.J.                 Calgary, Alberta, Canada
East Chicago, Ind.                  Sigurd, Utah                       Puebla, Puebla, Mexico
Fort Dodge, Iowa                    Tacoma, Wash. (leased)             Port Klang, Malaysia (leased)
Galena Park, Texas                  Torrance, Calif.
Gypsum, Ohio                        Hagersville, Ontario, Canada
</TABLE>

<TABLE>
<CAPTION>
Gypsum Rock (mines and quarries)
<S>                                 <C>                                <C>
Alabaster (Tawas City), Mich.       Shoals, Ind.                       Hagersville, Ontario, Canada
Empire, Nev.                        Sigurd, Utah                       Little Narrows, Nova Scotia, Canada
Fort Dodge, Iowa                    Southard, Okla.                    Windsor, Nova Scotia, Canada
Plaster City, Calif.                Sperry, Iowa
Plasterco (Saltville), Va.          Sweetwater, Texas

Synthetic  gypsum is processed  at  Belledune,  New  Brunswick,  Canada.  Mining
operations at Oakfield, N.Y., were shut down on July 3, 1998.
</TABLE>

<TABLE>
<CAPTION>
Paper for Gypsum Wallboard
<S>                                 <C>                                 <C>
Clark, N.J.                         Jacksonville, Fla.                  South Gate, Calif.
Galena Park, Texas                  North Kansas City, Mo.
Gypsum, Ohio                        Oakfield, N.Y.
</TABLE>

Other Products

A mica-processing plant is located at Spruce Pine, N.C.; perlite ore is produced
at Grants,  N.M.; and drywall metal products are  manufactured  at Medina,  Ohio
(leased).  Metal lath,  plaster and  drywall  accessories  and light gauge steel
framing products are manufactured at Puebla,  Mexico. Various other products are
manufactured at La Mirada,  Calif.  (adhesives and finishes);  New Orleans,  La.
(lime products);  and Port Hawkesbury,  Nova Scotia,  Canada (gypsum fiber panel
products).

Ocean Vessels

Gypsum  Transportation  Limited,  a wholly owned  subsidiary of the  Corporation
headquartered  in  Bermuda,  owns and  operates a fleet of three  self-unloading
ocean vessels.  Under contract of affreightment,  these vessels transport gypsum
rock from Nova Scotia to the East Coast plants of U.S. Gypsum. Excess ship time,
when available, is offered for charter on the open market.
<PAGE>
<TABLE>

Worldwide Ceilings
<CAPTION>

Ceiling Tile
<S>                                 <C>                                <C>
Cloquet, Minn.                      Walworth, Wis.                     Aubange, Belgium
Greenville, Miss.                   San Juan Ixhuatepec, Mexico

Ceiling Grid

Cartersville, Ga.                   Dreux, France                      Viersen, Germany
Stockton, Calif.                    Oakville, Ontario, Canada          Taipei, Taiwan (leased)
Westlake, Ohio                      Peterlee, England (leased)
Auckland, New Zealand (leased)      Port Klang, Malaysia (leased)
</TABLE>

A coil coater and slitter  plant used in the  production of ceiling grid also is
located in Westlake,  Ohio and a slitter  plant is located in  Stockton,  Calif.
(leased).

Other Products

Access floor systems  products are manufactured at Peterlee,  England  (leased),
and Port Klang,  Malaysia  (leased).  Mineral fiber products are manufactured at
Red Wing,  Minn. and Walworth,  Wis. Wall system  products are  manufactured  at
Medina,  Ohio  (leased).  Drywall metal products are  manufactured  at Prestice,
Czech Republic (leased).

Item 3.  LEGAL PROCEEDINGS


Information  pertaining to legal  proceedings is included in "Notes to Financial
Statements - Note 15.  Litigation"  of the  Corporation's  1998 Annual Report to
Stockholders and is incorporated herein by reference.


Item 4.  SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS


None during the fourth quarter of 1998.



                                     PART II

Item 5. MARKET FOR THE REGISTRANT'S COMMON STOCK AND RELATED STOCKHOLDER MATTERS


Information  with  respect to the  principal  market on which the  Corporation's
common  stock is traded,  the range of high and low market  prices and number of
stockholders of record is included in "Selected Quarterly Financial Data" of the
Corporation's  1998 Annual Report to Stockholders and is incorporated  herein by
reference.

On September  18, 1998,  USG declared a cash  dividend of $0.10 per common share
that was paid on December 16, 1998, to stockholders of record as of November 27,
1998.  This was USG's first  quarterly  cash dividend since the third quarter of
1988.

On November 22, 1996, the Corporation entered into a retention agreement with an
employee,  formerly the principal  stockholder of a corporation certain of whose
assets were  purchased by the  Corporation,  whereby the  Corporation  agreed to
grant shares of unregistered  common stock, $0.10 par value, having an aggregate
value equal to $250,000,  in five  separate  annual  installments  each having a
value equal to $50,000,  in reliance on the private offering  exemption afforded
by Section 4(2) of the  Securities  Act of 1933,  as amended.  The second annual
grant in the amount of 1,062  shares was made on November  24,  1997.  The third
annual grant in the amount of 1,021  shares was made on November  23, 1998.  The
unregistered  common  stock  is  restricted  from  transfer,   resale  or  other
disposition until November 22, 2001.


Item 6.  SELECTED FINANCIAL DATA


Selected  financial data are included in "Comparative  Five-Year Summary" of the
Corporation's  1998 Annual Report to Stockholders and is incorporated  herein by
reference.


Item 7.  MANAGEMENT'S  DISCUSSION  AND  ANALYSIS  OF RESULTS OF  OPERATIONS  AND
         FINANCIAL CONDITION


"Management's  Discussion  and Analysis of Results of  Operations  and Financial
Condition"  of  the   Corporation's   1998  Annual  Report  to  Stockholders  is
incorporated herein by reference.


Item 8.  FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA


Financial statements and supplementary data included in "Consolidated  Statement
of Earnings,"  "Consolidated  Balance  Sheet,"  "Consolidated  Statement of Cash
Flows,"  "Consolidated   Statement  of  Stockholders'   Equity,"   "Consolidated
Statement of Comprehensive  Income," "Notes to Financial Statements" and "Report
of Independent  Public  Accountants" of the Corporation's  1998 Annual Report to
Stockholders is incorporated herein by reference.


Item  9.  CHANGES  IN AND  DISAGREEMENTS  WITH  ACCOUNTANTS  ON  ACCOUNTING  AND
          FINANCIAL DISCLOSURE


None.
<PAGE>
<TABLE>
                                    PART III

Item 10.  DIRECTORS AND EXECUTIVE OFFICERS OF THE REGISTRANT

Information  regarding  directors  is included in the  Corporation's  definitive
Proxy Statement, which is incorporated herein by reference.

Executive Officers of the Registrant (as of February 10, 1999)



             Name, Age                    Prior Business Experience in Past Five Years             Has Held
        and Present Position                                                                        Present
                                                                                                Position Since
- - -------------------------------------------------------------------------------------------- ---------------------
<CAPTION>
<S>                                 <C>                                                            <C>

William C. Foote, 47                President and Chief Operating Officer from January 1994 to     June 1997
Chairman and Chief Executive        January 1996; President and Chief Executive Officer to April
Officer                             1996; Chairman, President and Chief Executive Officer from
                                    April 1996 to June 1997.

P. Jack O'Bryan, 63                 Senior Vice President and Chief Technology Officer, USG        February 1999
President and Chief Operating       Corporation to August 1994; Senior Vice President -
Officer; President and Chief        Worldwide Manufacturing and Technology to October 1995;
Executive Officer, L&W Supply       Executive Vice President - Worldwide Ceilings to September
Corporation.                        1996; Executive Vice President - Operations to June 1997;
                                    President  and  Chief   Executive   Officer,
                                    United  States  Gypsum  Company from October
                                    1996 to February  1999;  President and Chief
                                    Executive Officer, USG Interiors,  Inc. from
                                    October 1995 to February 1999; President and
                                    Chief Operating Officer since June 1997.

Richard H. Fleming, 51              Vice President and Chief Financial Officer to January 1995;     February 1999
Executive Vice President and Chief  Senior Vice President and Chief Financial Officer to February
Financial Officer                   1999.

Raymond T. Belz, 58                 Vice President and Controller, USG Corporation from January     February 1999
Senior Vice President and           1994 to February 1999; Vice President Financial Services,
Controller; Executive Vice          United States Gypsum Company from January 1994 to January
President, Financial Operations,    1995; Vice President and Chief Financial Officer, North
North American Gypsum               American Gypsum from January 1995 to September 1996; Vice
and Worldwide Ceilings              President Financial Operations, North American Gypsum and
                                    Worldwide  Ceilings from  September  1996 to February 1999.

Arthur G. Leisten, 57               Same Position                                                    February 1994
Senior Vice President and General
Counsel

Harold E. Pendexter, Jr., 64        Same position.                                                   January 1991
Senior Vice President and Chief
Administrative Officer

Edward M. Bosowski, 44              Vice President Market Development and Planning, United States    February 1999
Vice President; President and       Gypsum Company to February 1995; Vice President and Chief
Chief Excutive Officer, United      Financial Officer, Worldwide Ceilings and Vice President, USG
States Gypsum Company               Interiors, Inc. to September 1996; Executive Vice President-
                                    Marketing, United States Gypsum Company to February 1999.

</TABLE>
<PAGE>
<TABLE>


             Name, Age                    Prior Business Experience in Past Five Years             Has Held
        and Present Position                                                                        Present
                                                                                                Position Since
- - -------------------------------------------------------------------------------------------- ---------------------
<CAPTION>
<S>                                 <C>                             <C>                          <C>
Brian W. Burrows, 59                Same position.                                               March 1987
Vice President, Research and
Technology

Brian J. Cook, 41                   Director, Employee Relations, Training and Corporate         December 1998
Vice President, Human Resources     Employee Counsel to April 1996; Director, Human Resources
                                    Planning and Development and Corporate Employee Counsel
                                    to December 1997; Director, Human Resources - Operations
                                    to December 1998.

Stanley L. Ferguson, 46             Associate General Counsel to February 1999.                  February 1999
Vice President and Associate
General Counsel

Jean K. Holley, 39                  Manager, Computer Services, WMX Environmental                 August 1998
Vice President and Chief            Monitoring Laboratories (a subsidiary of Waste Management
Information Officer                 Corporation) to March 1994; Director, Information
                                    Technology,   WMX  Environmental  Monitoring
                                    Laboratories   to  March   1996;   Director,
                                    Information    Systems,    Rust   Industrial
                                    Services (a subsidiary  of Waste  Management
                                    Corporation)   to  December   1996;   Senior
                                    Director,   Information  Technology,   Waste
                                    Management Corporation to August 1998.

Marci N. Kaminsky, 40               Director, Public Relations, The Nutrasweet Company to March   October 1998
Vice President, Communications      1995; Vice President, U.S. Communications, Bank of
                                    Montreal/Harris Bank to January 1997; Senior
                                    Vice  President,  Public  Affairs,  Bank  of
                                    Montreal/Harris Bank to October 1998.

D. Rick Lowes, 44                   Vice President and Chief Financial Officer, CGC Inc. to       January 1999
Vice President and Treasurer        January 1999.

Peter K. Maitland, 57               Director, Employee Benefits and Office Facilities to June     February 1999
Vice President, Compensation,       1997; Director, Employee Benefits and Office Management to
Benefits and Administration         February 1999.

John E. Malone, 55                  Vice President - Finance, USG International from March        January 1999
Vice President                      1993 to February 1995; Vice President and Treasurer from
                                    January 1994 to January 1999.

John H. Meister,  41                Director, Marketing East, United States Gypsum Company        February 1999
Vice President; President and       July 1994; Vice President Marketing - East, United States
Chief Executive Officer, USG        Gypsum Company to November 1995; Executive Vice President
Interiors, Inc.                     and Chief Operating Officer, L&W Supply Corporation to
                                    May  1996;  President  and  Chief  Executive
                                    Officer,  L&W Supply Corporation to February
                                    1999.

Daniel J. Nootens, 60               Vice President Manufacturing, United States Gypsum Company     June 1997
Vice President; Executive Vice      from November 1990 to July 1994; Executive Vice President
President, Strategic Manufacturing  & Chief Operating Officer, United Sates Gypsum Company from
& Capital Investments, North        July 1994 to September 1996; Executive Vice President-
American Gypsum and Worldwide       Operations, North American Gypsum from September 1996 to 
Ceilings                            June 1997.

Robert B. Sirgant, 58               Vice President, National Accounts and Marketing - East,        January 1995
Vice President, Corporate Accounts  United States Gypsum Company to July 1994; Vice President,
                                    National Accounts, United States Gypsum Company to January
                                    1995.

Dean Goossen, 51                    Same position.                                                 February 1994
Corporate Secretary
</TABLE>


Item 11.  EXECUTIVE COMPENSATION

Information  required  by Item 11 is included  in the  Corporation's  definitive
Proxy Statement, which is incorporated herein by reference.

Item 12.  SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT

Information  required  by Item 12 is included  in the  Corporation's  definitive
Proxy Statement, which is incorporated herein by reference.

Item 13.  CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS

Information  required  by Item 13 is included  in the  Corporation's  definitive
Proxy Statement, which is incorporated herein by reference.

<TABLE>
                                     PART IV

Item 14.  EXHIBITS, FINANCIAL STATEMENT SCHEDULES AND REPORTS ON FORM 8-K


(a)  The following documents are filed as part of this 10-K Report:
<CAPTION>
     <S> <C>


     1.  The consolidated  financial  statements,  notes to financial statements
         and  report  of  independent   public   accountants   included  in  the
         Corporation's  1998 Annual Report to Stockholders  and listed below are
         incorporated herein by reference:

         Consolidated  Statement  of Earnings - Years ended  December  31, 1998,
         1997 and 1996.

         Consolidated Balance Sheet - As of December 31, 1998 and 1997.

         Consolidated  Statement of Cash Flows - Years ended  December 31, 1998,
         1997 and 1996.

         Consolidated  Statement of Stockholders'  Equity - Years ended December
         31, 1998, 1997 and 1996.

         Consolidated  Statement of Comprehensive  Income - Years ended December
         31, 1998, 1997 and 1996.

         Notes to Financial Statements.

         Report of Independent Public Accountants.


     2.  Supplemental Financial Statement Schedules:

         Schedule II - Valuation and Qualifying Accounts.

         Report of Independent Public Accountants With Respect to Financial Statement Schedule.

         All other  schedules  have been omitted  because they are not required,
         are not  applicable,  or the  information  is included in the financial
         statements or notes thereto.

     3.  Exhibits (Reg. S-K, Item 601):
</TABLE>
<TABLE>

   Exhibit
    No.                                                                                      Page

           3 Articles of incorporation and by-laws:
<CAPTION>
                <S>     <C>

                (a)     Restated Certificate of Incorporation of USG Corporation
                        (incorporated   by  reference  to  Exhibit  3.1  of  USG
                        Corporation's Form 8-K, dated May 7, 1993).
                (b)     Certificate  of  Designation  of  Junior   Participating
                        Preferred   Stock,   series   D,   of  USG   Corporation
                        (incorporated  by reference to Exhibit A of Exhibit 4 to
                        USG Corporation's Form 8-K dated March 27, 1998).
                (c)     Amended and Restated By-Laws of USG  Corporation,  dated
                        as of March  27,  1998  (incorporated  by  reference  to
                        Exhibit 3(ii) of USG Corporation's  Form 10-Q, dated May
                        1, 1998).
</TABLE>
<TABLE>

           4  Instruments  defining  the rights of security  holders,  including
              indentures:
 <CAPTION>
                <S>     <C>

                (a)     Indenture  dated  as of  October  1,  1986  between  USG
                        Corporation  and Harris Trust and Savings Bank,  Trustee
                        (incorporated  by  reference  to  Exhibit  4(a)  of  USG
                        Corporation's Registration Statement No. 33-9294 on Form
                        S-3, dated October 7, 1986).
                (b)     Rights  Agreement  dated  March 27,  1998,  between  USG
                        Corporation and Harris Trust and Savings Bank, as Rights
                        Agent  (incorporated  by  reference  to Exhibit 4 of USG
                        Corporation's Form 8-K, dated March 27, 1998).
                (c)     Form  of  Common  Stock  certificate   (incorporated  by
                        reference to Exhibit 4.4 to USG Corporation's  Form 8-K,
                        dated May 7, 1993).

                        The   Corporation   and  certain  of  its   consolidated
                        subsidiaries  are parties to long-term debt  instruments
                        under which the total  amount of  securities  authorized
                        does  not  exceed  10%  of  the  total   assets  of  the
                        Corporation  and  its  subsidiaries  on  a  consolidated
                        basis. Pursuant to paragraph  (b)(4)(iii)(A) of Item 601
                        of Regulation S-K, the  Corporation  agrees to furnish a
                        copy of such  instruments to the Securities and Exchange
                        Commission upon request.
</TABLE>
<TABLE>

          10 Material contracts:
<CAPTION>
                <S>     <C>

                (a)     Management   Performance   Plan   of   USG   Corporation
                        (incorporated by reference to Annex C of Amendment No. 8
                        to USG Corporation's Registration Statement No. 33-40136
                        on Form S-4, dated February 3, 1993).
                (b)     First   Amendment  to   Management   Performance   Plan,
                        effective  November 15, 1993, and dated February 1, 1994
                        (incorporated   by  reference   to  Exhibit   10(aq)  of
                        Amendment  No.  1  of  USG  Corporation's   Registration
                        Statement No. 33-51845 on Form S- 1).
                (c)     Amendment   and    Restatement   of   USG    Corporation
                        Supplemental  Retirement  Plan,  effective as of July 1,
                        1997,  and  dated  August  25,  1997   (incorporated  by
                        reference to Exhibit 10(c) of USG  Corporation's  Annual
                        Report on Form 10-K, dated February 20, 1998).
                (d)     First Amendment to Supplemental Retirement Plan, effect-                    21
                        ive July 1, 1997.
                (e)     Termination  Compensation  Agreements  (incorporated  by
                        reference  to Exhibit  10(h) of USG  Corporation's  1991
                        Annual Report on Form 10-K, dated March 5, 1992).
                (f)     Amendment   of   Termination   Compensation   Agreements
                        (incorporated by reference to Exhibit 10(j) of Amendment
                        No. 1 to USG  Corporation's  Registration  Statement No.
                        33-61152 on Form S-1).
                (g)     Indemnification Agreements (incorporated by reference to
                        Exhibit  10(g) of Amendment  No. 1 to USG  Corporation's
                        Registration No. 33-51845 on Form S-1).
                (h)     Form  of  Employment   Agreement   dated  May  12,  1993
                        (incorporated by reference to Exhibit 10(h) of Amendment
                        No. 1 to USG  Corporation's  Registration  Statement No.
                        33-61152 on Form S-1).
                (i)     Credit  Agreement  dated as of July 27, 1995,  among USG
                        Corporation  and the Banks listed on the signature  page
                        thereto  and Chase  Manhattan  Bank  (formerly  Chemical
                        Bank) as Agent  (incorporated  by  reference  to Exhibit
                        99(a)  of   Amendment   No.   3  to  USG   Corporation's
                        Registration Statement No. 33-60563 on Form S-3, dated
                        July 28, 1995).
                (j)     Amendment  No. 1, dated as of February  1, 1996,  to the
                        Credit  Agreement  (incorporated by reference to Exhibit
                        10(l) of USG  Corporation's  1995 Annual  Report on Form
                        10-K, dated February 29, 1996).
                (k)     Amendment No. 2, dated as of May 14, 1997, to the Credit
                        Agreement (incorporated by reference to Exhibit 10(l) of
                        USG  Corporation's  Annual  Report on Form  10-K,  dated
                        February 20, 1998).
                (l)     1995   Long-Term   Equity   Plan   of  USG   Corporation
                        (incorporated   by   reference   to   Annex   A  to  USG
                        Corporation's Proxy Statement and Proxy, dated March 31,
                        1995).
                (m)     1998 Annual Management Incentive Program - USG                              24
                        Corporation.
                (n)     Omnibus  Management   Incentive  Plan  (incorporated  by
                        reference  to  Annex  A  to  USG   Corporation's   Proxy
                        Statement and Proxy, dated March 28, 1997).
                (o)     First  Amendment to Omnibus  Management  Incentive Plan,
                        dated as of November 11, 1997 (incorporated by reference
                        to Exhibit 10(p) of USG  Corporation's  Annual Report on
                        Form 10-K, dated February 20, 1998).
                (p)     Amended and Restated Stock Compensation Program for Non-
                        Employee  Directors  of USG  Corporation,  dated July 1,
                        1997  (incorporated by reference to Exhibit 10(q) of USG
                        Corporation's Annual Report on Form 10-K, dated February
                        20, 1998).
</TABLE>

<TABLE>
<S>          <C>

13           Portions of USG Corporation's 1998 Annual Report to Stockholders.                      32
             (Such report is not deemed to be filed with the Commission as part of this
             Annual Report on Form 10-K, except for the portions thereof expressly
             incorporated by reference.)
21           Subsidiaries                                                                           63
23           Consents of Experts and Counsel                                                        64
24           Power of Attorney                                                                      65
27           Financial Data Schedule                                                                66



(b)          Reports on Form 8-K:

             No reports on Form 8-K were filed during the fourth quarter of 1998.
</TABLE>
<TABLE>

                                              Index to exhibits filed
                                        with the Annual Report on Form 10-K
                                       for the year ended December 31, 1998




Exhibit                                                                                            Page
<CAPTION>
<S>      <C>                                                                                          <C>

10(d)    First Amendment of USG Corporation Supplemental Retirement Plan                              21

10(m)    1999 Annual Management Incentive Program - USG Corporation                                   24

13       Portions of USG Corporation's 1998 Annual Report to Stockholders                             32

21       Subsidiaries.........................................................................        63

23       Consent of Experts and Counsel........................................................       64

24       Power of Attorney......................................................................      65

27       Financial Data Schedule................................................................      66
</TABLE>

If you wish to receive a copy of any exhibit,  it may be obtained,  upon payment
of reasonable expenses, by writing to:

                         Dean H. Goossen, Corporate Secretary
                         USG Corporation
                         Department #188
                         P.O. Box 6721
                         Chicago, IL  60680-6721


<PAGE>
<TABLE>

                                                  USG CORPORATION
                                                    SCHEDULE II
                                         VALUATION AND QUALIFYING ACCOUNTS
                                               (Dollars in millions)


                                                                          Provision       Receivables
                                                                          Charged to      Written Off
                                                            Beginning     Costs and      and Discounts     Ending
                                                             Balance       Expenses         Allowed        Balance
                                                             -------       --------         -------        -------

Year ended December 31, 1998:
<CAPTION>
<S>  <C>                                                  <C>            <C>            <C>             <C>

     Doubtful accounts.................................   $     14       $      4       $     (4)       $    14
     Cash discounts....................................          3             59            (58)             4


Year ended December 31, 1997:

     Doubtful accounts.................................         14              5             (5)            14
     Cash discounts....................................          3             52            (52)             3


Year ended December 31, 1996:

     Doubtful accounts.................................         11              7             (4)            14
     Cash discounts....................................          3             46            (46)             3
</TABLE>
<PAGE>


                    REPORT OF INDEPENDENT PUBLIC ACCOUNTANTS
                  WITH RESPECT TO FINANCIAL STATEMENT SCHEDULE



     We have audited,  in accordance with generally accepted auditing standards,
the  consolidated  financial  statements  included in USG  Corporation's  annual
report to  stockholders  incorporated  by  reference  in this Form 10-K and have
issued our report  thereon  dated  January 22, 1999.  Our audit was made for the
purpose of forming an opinion on the consolidated  financial statements taken as
a whole. The financial  statement  schedule on page 18 is the  responsibility of
the Corporation's management and is presented for purposes of complying with the
Securities and Exchange  Commission's  rules and is not part of the consolidated
financial statements. The financial statement schedule has been subjected to the
auditing  procedures  applied  in  the  audit  of  the  consolidated   financial
statements  and, in our  opinion,  fairly  states in all  material  respects the
financial data required to be set forth therein in relation to the  consolidated
financial statements taken as a whole.



                                              /s/ Arthur Andersen LLP
                                              ----------------------
                                              ARTHUR ANDERSEN LLP


Chicago, Illinois
February 26, 1999
<PAGE>

                                   SIGNATURES


Pursuant to the  requirements of Section 13 or 15(d) of the Securities  Exchange
Act of 1934,  the  Registrant  has duly  caused  this report to be signed on its
behalf by the undersigned, thereunto duly authorized.

                                              USG CORPORATION
February 26, 1999


                                              By: /s/ Richard H. Fleming
                                              --------------------------
                                              Richard H. Fleming
                                              Executive Vice President and
                                              Chief Financial Officer


Pursuant to the requirements of the Securities Exchange Act of 1934, this report
has been signed below by the following  persons on behalf of the  Registrant and
in the capacities and on the date indicated.


/s/ William C. Foote                              February 26, 1999
- - ----------------------
WILLIAM C. FOOTE
Chairman and Chief Executive Officer
(Principal Executive Officer)


/s/ Richard H. Fleming                            February 26, 1999
- - ----------------------
RICHARD H. FLEMING
Executive Vice President and
Chief Financial Officer
(Principal Financial Officer)


/s/ Raymond T. Belz                               February 26, 1999
- - ----------------------
RAYMOND T. BELZ
Senior Vice President and Controller
(Principal Accounting Officer)


                                              )    By:/s/ Richard H. Fleming
ROBERT L. BARNETT, KEITH A. BROWN,            )    -------------------------
W.H. CLARK, JAMES C. COTTING,                 )    Richard H. Fleming
LAWRENCE M. CRUTCHER, W. DOUGLAS              )    Attorney-in-fact
FORD, DAVID W. FOX, PHILIP C. JACKSON, JR.,   )    Pursuant to Power of Attorney
VALERIE B. JARRETT, MARVIN E. LESSER,         )    (Exhibit 24 hereto)
P. JACK O'BRYAN, JOHN B. SCHEWEMM,            )    February 26, 1999
JUDITH A. SPRIESER,                           )
Directors                                     )
                            
                                  EXHIBIT 10(d)
                                 FIRST AMENDMENT
                                       OF
                  USG CORPORATION SUPPLEMENTAL RETIREMENT PLAN

             (As Amended and Restated Effective as of July 1, 1997)

WHEREAS, USG Corporation maintains the USG Corporation  Supplemental  Retirement
Plan (the "plan"), which plan was amended and restated in its entirety effective
as of July 1, 1997; and

WHEREAS, it is now considered desirable to amend the plan;

NOW,  THEREFORE,  pursuant to the amending power reserved to the  Corporation as
the "Company" under Section 7 of the plan, as amended, the plan be and it hereby
is  further  amended,  effective  as  of  January  1,  1999,  in  the  following
particulars:

1. By  substituting  the following  for  subsection  2.1 of the plan,  effective
January 1, 1997:

     "2.1. Covered Employee. A "Covered Employee" for any calendar year means an
     employee of an Employer  under the plan who the  Committee,  in  accordance
     with such rules as it may establish,  anticipates will have  "compensation"
     (as  defined  below)  for such year in excess of $80,000  (or such  greater
     amount as may be determined by the Secretary of the United States  Treasury
     under Section  414(q)(1)(B)(i)  of the Internal  Revenue Code),  unless the
     Committee specifies that such employee shall not be considered as a Covered
     Employee for any purpose of the plan by writing filed with the Secretary of
     the  Company  prior  to, or within  30 days  after,  the date the  employee
     otherwise would become eligible for participation in the plan. For purposes
     of this subsection 3.1, compensation shall mean base salary."

2. By adding the following subparagraph 3.4(d) to the plan, effective January 1,
1999:

          "(d) A Covered  Employee who first becomes  eligible (or first becomes
          eligible following rehire) to make before-tax contributions under this
          subsection 3.4 effective on or after January 1, 1999 will be deemed to
          have  elected  to make  before-tax  contributions,  unless  he  elects
          otherwise in accordance with rules established by the Committee."

3. By  substituting  the following  for  subsection  4.3 of the plan,  effective
January 1, 1999:

     "4.3 Elective  Participant  Contributions.  A Participant may elect to make
     part or all of the  additional  before-tax  contributions  described in the
     first sentence of subsection 4.1. A Participant's  before-tax contributions
     under this subsection 4.3 shall be made by a compensation deferral election
     that is made  in such  form  and in  such  manner  as the  Committee  shall
     determine;  provided any such election  shall be made prior to the calendar
     year such  contributions  are to begin,  or if a Participant  first becomes
     eligible to make such  contributions  after the  beginning  of any calendar
     year, not more than 30 days after so becoming  eligible.  A Participant who
     first becomes eligible (or first becomes eligible following rehire) to make
     additional before-tax  contributions under this subsection 4.3 effective on
     or after January 1, 1999 will be deemed to have elected to make  additional
     before-tax  contributions under this subsection 4.3 in such amount that his
     additional  before-tax  contributions  under this subsection 4.3 and to the
     Investment Plan equal 3% of his earnings (as defined in the Investment Plan
     but without regard to the limitation  imposed by Section  401(a)(17) of the
     Internal Revenue Code), unless he elects otherwise in accordance with rules
     established  by  the  Committee.  A  Participant's   compensation  deferral
     election under this  subsection 4.3 shall apply to employment  compensation
     otherwise  payable  after  the  later to occur of the date the  Participant
     becomes  eligible  to  make  before-tax  contributions  and  the  date  the
     compensation  deferral  election  is  made.  A  Participant's  compensation
     deferral election may be revoked by the Participant before the beginning of
     any  subsequent  calendar  year.  The  revocation  shall be effective as to
     employment  compensation the Participant is entitled to receive during that
     and  subsequent  calendar  years  unless prior to the  commencement  of any
     subsequent  calendar  year  the  Participant  makes  another   compensation
     deferral  election.  Such  later  election  shall  apply  as to  employment
     compensation  otherwise  payable during calendar years beginning after such
     later  election is made.  Notwithstanding  the foregoing,  a  Participant's
     compensation  deferral  election  automatically  shall be  revoked  for any
     period he ceases to be a Covered Employee."

IN WITNESS  WHEREOF,  the company has caused these  presents to be signed on its
behalf by an officer thereunto duly authorized this 23rd day of December, 1998.

                                     USG CORPORATION

                                     By: /s/ Harold E. Pendexter, Jr.
                                     ---------------------------------
                                     Senior Vice President and
                                     Chief Administrative Officer

                                 EXHIBIT 10(m)

                                      1998


                                     Annual
                          Management Incentive Program


                                 USG Corporation


                                     PURPOSE

To enhance USG Corporation's ability to attract, motivate, reward and retain key
employees of the  Corporation and its operating  subsidiaries  and to strengthen
the existing  mutual interest  between such key employees and the  Corporation's
stockholders by providing  incentive award  opportunities  to such key employees
who  discharge  their  accountabilities  in a manner  which  makes a  measurable
contribution to the Corporation's earnings.

                                  INTRODUCTION


This  Annual  Management  Incentive  Program is in effect  from  January 1, 1998
through December 31, 1998.

                                   ELIGIBILITY


Individuals  eligible for  participation  in this Program are those officers and
other key  employees  occupying  management  positions in Broadband 13 or higher
(775 or more points).  Employees who  participate in any other annual  incentive
program  of the  Corporation  or any of its  subsidiaries  are not  eligible  to
participate in this Program.

                                      GOALS

For the 1998 Annual Management Incentive Program, Net Earnings,  Goal Income and
Strategic  Targets for USG Corporation,  Subsidiaries and Profit Centers will be
determined  by the  Grants  and  Awards  Subcommittee  of the  Compensation  and
Organization  Committee of the USG Board of Directors (the "Subcommittee") after
considering   recommendations  submitted  from  USG  Corporation  and  Operating
Subsidiaries. Except in the case of a Named Executive Officer (as defined in the
Administrative  Guidelines  below),  Profit  Center goals may be adjusted by the
Chairman  of  USG  Corporation  if  business  conditions  or  other  significant
unforeseen  circumstances  beyond the control of the Profit  Center have a major
impact on opportunity.
<PAGE>
<TABLE>

                                  AWARD VALUES

For the Annual Management  Incentive  Program,  position target incentive values
are based on level of accountability  and are expressed as a percent of approved
annualized salary.  Resulting award opportunities  represent a fully competitive
incentive  opportunity  for 100% (target)  achievement  of Corporate,  Operating
Subsidiary and/or Profit Center goals:
<CAPTION>
<S>                                                                             <C>          <C>
- - -------------------------------------------------------------------------------------------------------------------

                                                                                Position Target Incentive

Chairman & CEO - USG Corporation                                                             70%
- - -------------------------------------------------------------------------------------------------------------------

President & COO, USG Corporation;                                                            60%
  President & CEO, U.S. Gypsum Company;
  President & CEO, USG Interiors, Inc.
- - -------------------------------------------------------------------------------------------------------------------

USG CORPORATION
      Senior Vice President & General Counsel                                                50%
      Senior Vice President & Chief Administrative Officer
      Senior Vice President & Chief Financial Officer
- - -------------------------------------------------------------------------------------------------------------------

USG CORPORATION & OPERATING SUBSIDIARIES
      OFFICERS AND MANAGERS
      President & CEO, L&W Supply Corporation                                                45%

      Executive Vice President & COO, Worldwide Ceilings

      Vice President, USG Corporation;
        Executive Vice President Strategic Manufacturing & Capital Investments,
        North American Gypsum and Worldwide Ceilings

      Executive Vice President - Operations, U.S. Gypsum Company

      Executive Vice President Marketing, U.S. Gypsum Company
- - -------------------------------------------------------------------------------------------------------------------

      President & Managing Director - USG Europe                                             40%

      Vice President & Controller, USG Corporation;
        Vice President Financial Operations,
        North American Gypsum and Worldwide Ceilings

      Vice President Research & Technology, USG Corporation

      Vice President & Treasurer, USG Corporation

      President & CEO, CGC, Inc.

      Vice President Corporate Communications, USG Corporation
- - -------------------------------------------------------------------------------------------------------------------

USG CORPORATION, OPERATING SUBSIDIARIES & PROFIT CENTERS
      OFFICERS AND MANAGERS
      Position Reference Point: $144,660 - and over                                          35%
      Position Reference Point: $128,880 - $144,659                                          25%
      Position Reference Point: $114,960 - $128,879                                          20%
      Position Reference Point: $ 92,100 - $114,959                                          15%
      Position Reference Point: $ 88,680 - $ 92,099                                          10%
- - ------------------------------------------------------------------------------------------ ------------------------
</TABLE>
<PAGE>

                                     AWARDS

Incentive  awards for all participants in the 1998 Annual  Management  Incentive
Program will be reviewed and approved by the Subcommittee.

The total of all  incentive  awards paid under this program will not exceed 4.0%
of USG  Corporation's  1998  consolidated  goal income. In the event that awards
otherwise  payable pursuant to the Annual  Management  Incentive  Program exceed
such amount,  all awards will be reduced prorata to an aggregate amount equal to
4.0%.

For all  participants,  the annual incentive award opportunity is the annualized
salary in effect at the  beginning of the calendar year (March 1 of the calendar
year for the  eighteen  most senior  executives)  multiplied  by the  applicable
position target incentive value percent.

<TABLE>
Incentive awards for 1998 will be based on:
<CAPTION>
         <S>      <C>                                         <C>

         o        NET EARNINGS:                               20% - 60% OF INCENTIVE
                  based on the Corporation's year-end financial statements.

         o        GOAL INCOME:                                20% - 60% OF INCENTIVE
                  (net sales less cost of sales and selling  and  administrative
                  expenses)  based  on  the  Corporation's   year-end  financial
                  statements.

         o        STRATEGIC FOCUS TARGET:                     20% OF INCENTIVE

         o        PERSONAL PERFORMANCE:                       20% OF INCENTIVE
                  [except  in  the  case  of  the  eighteen   (18)  most  senior
                  executives   whose  awards  are  based  solely  on  degree  of
                  achievement  of Net  Earnings  and/or  Goal  Income  (60%) and
                  Strategic Focus Target (40%) results].

         o        Except in the case of a Named Executive Officer, other
                  appropriate performance measures as approved by the
                  Subcommittee.

1.       For  participants  to qualify for the NET  EARNINGS  and/or GOAL INCOME
         segment  comprising 60% of their award,  their respective  organization
         (e.g. Corporation/Group/ Subsidiary, etc. as described on page 6)
         must achieve 75% or higher of its net earnings or goal income target.

2.       NET EARNINGS and GOAL INCOME  segment  award amounts will be determined
         according to the following schedule:
</TABLE>
<TABLE>

         Net Earnings/                           Adjustment Factor for Corporate, Group,
         Goal Income Achievement                 Subsidiary or Profit Center Performance
- - -------------------------------------------------------------------------------------------------
<CAPTION>
         <S>                       <C>                                 <C>

         Below                       75%                                 0%
                                     75%                                50%
                                     80%                                60%
                                     90%                                80%
                                    100%                               100%
                                    110%                               120%
                                    120%                               140%
                                    140%                               180%
                                    150%                               200%

     3. For  participants  to qualify for the STRATEGIC FOCUS TARGET segment
     comprising  20% (40% for the  eighteen  most  senior  executives)  of their
     incentive award, their respective organization must achieve a minimum level
     of  performance  related to the specified  strategic  focus.  The Strategic
     Focus Targets will be  measurable,  verifiable  and derived from the formal
     strategic  planning  process (e.g.,  cost reduction,  sales growth,  market
     share gain,  margins,  etc.). The award adjustment  factor for this segment
     will range from 0.5 (after achieving minimum performance levels) to 2.0 for
     maximum attainment.  Participants will receive schedules of Strategic Focus
     Targets upon approval by the Subcommittee.

     4.  Except  with  respect  to the  eighteen  (18)  most  senior  executives
     (including the Named  Executive  Officers) whose awards are based solely on
     achievement  of Net  Earnings,  Goal Income and  Strategic  Focus  Targets,
     participants  will have a third segment  comprising 20% of their  incentive
     award based upon their individual Personal  Performance Rating according to
     the following schedule:
</TABLE>
<TABLE>

         <S>                                       <C>

         Personal                                  Personal Performance
         Performance Rating                        Adjustment Range
- - -------------------------------------------------- ----------------------------------------

         Far Exceeded Expectations                 1.70 - 2.00
- - -------------------------------------------------- ----------------------------------------

         Exceeded Expectations                     1.20 - 1.50
- - -------------------------------------------------- ----------------------------------------

         Achieved Expectations                     0.80 - 1.10
- - -------------------------------------------------- ----------------------------------------

     The maximum  incentive award including all segments of this Program is 200%
     of the target incentive opportunity.

     The  Subcommittee  may  eliminate  awards to any  participant  who fails to
     receive a Personal Performance Rating of "Achieved  Expectations" or better
     under the Corporation's Performance Planning and Review (PPR) system.

     5. Target incentive award opportunities and calculations
     of awards for  participants  will be based on the  achievement  of specific
     Corporate, Group, Subsidiary and/or Profit Center net earnings, goal income
     and  strategic  focus  targets as  displayed  on the  following  page or as
     otherwise may be established subject to approval of the Chairman:
</TABLE>
<PAGE>
<TABLE>


                                            Basis for
                                            Financial Measures                               Basis for
                                            Incentive Award                                  Strategic Focus
Participants                                (60% of Target Incentive)                        Incentive Award
- - -------------------------------------------------------------------------------------------------------------------
<CAPTION>
<S>                                         <C>                                             <C>

USG Corporation

    USG Corporation Senior Executive        60% Net Earnings, USG Corporation                40%
    Management

    USG Corporation Staff                   60% Net Earnings, USG Corporation                20%

- - -------------------------------------------------------------------------------------------------------------------


North American Gypsum

    Executive VP - Operations, U.S. Gypsum  20% Net Earnings, USG Corporation                40% NAG
    Company

    Executive VP - Marketing, U.S. Gypsum   40% Goal Income, North American Gypsum
    Company

    General Mgr - IGD                       10% Goal Income, North American Gypsum           20% Profit Center
    General Mgr - Materials Division        20% Goal Income, Subsidiary
    Profit Center Staff                     30% Goal Income, Profit Center/Division

    President & CEO, CGC, Inc               20% Net Earnings, USG Corporation                40% NAG
                                            20% Goal Income,  North American Gypsum
                                            20% Goal Income, CGC, Inc

    President & General Mgr, YPSA           20% Goal Income, North American Gypsum           20% YPSA
                                            40% Goal Income, YPSA

    U.S. Gypsum Staff                       25% Goal Income, North American Gypsum           20% NAG
                                            35% Goal Income, U.S. Gypsum Company

    CGC, Inc Staff                          20% Goal Income, North American Gypsum           20% CGC
                                            40% Goal Income, CGC, Inc

- - -------------------------------------------------------------------------------------------------------------------


Worldwide Ceilings

    Executive VP & COO, Worldwide Ceilings  20% Net Earnings, USG Corporation                40% WWC
    President & Managing Director -         40% Goal Income, Worldwide Ceilings
    USG Europe

    USG Interiors, Inc Staff                25% Goal Income, Worldwide Ceilings              20% WWC
                                            35% Goal Income, USG Interiors, Inc

    USG International, Ltd Staff            25% Goal Income, Worldwide Ceilings              20% WWC
                                            35% Goal Income, USG International, Ltd

- - -------------------------------------------------------------------------------------------------------------------


L&W Supply Corporation

    President & CEO                         20% Net Earnings, USG Corporation                40% L&W
                                            20% Goal Income, North American Gypsum
                                            20% Goal Income, L&W Supply

    L&W Supply Corporation Staff            20% Goal Income, North American Gypsum           20% L&W
                                            40% Goal Income, L&W Supply

                                            10% Goal Income, North American Gypsum           20% L&W
                                            20% Goal Income, L&W Supply Corporation
                                            30% Goal Income, Profit Center (Business Unit)

- - -------------------------------------------------------------------------------------------------------------------

6.       SPECIAL AWARDS

In addition to the incentive opportunity provided by this Program, a special award may be recommended for any
participant or  non-participant,  other than a Named Executive Officer,  who has made an extraordinary contribution to the
Corporation's welfare or earnings.
</TABLE>
<PAGE>
<TABLE>
GENERAL PROVISIONS
- - --------------------------------------------------------------------------------------------------------------------------
<CAPTION>
<S>      <C>

1.       The  Subcommittee  shall review and approve the awards  recommended for
         officers and other employees who are eligible  participants in the 1998
         Annual Management  Incentive Program.  The Subcommittee shall submit to
         the Board of Directors, for their ratification,  a report of the awards
         for all eligible participants  including corporate officers approved by
         the Subcommittee in accordance with the provisions of the Program.

2.       The  Subcommittee   shall  have  full  power  to  make  the  rules  and
         regulations  with respect to the  determination of achievement of goals
         and the  distribution  of  awards.  No  awards  will be made  until the
         Subcommittee  has certified goal  achievement and applicable  awards in
         writing.

3.       The judgement of the  Subcommittee  in  construing  this Program or any
         provisions thereof, or in making any decision hereunder, shall be final
         and  conclusive and binding upon all employees of the  Corporation  and
         its subsidiaries  whether or not selected as  beneficiaries  hereunder,
         and their heirs, executors, personal representatives and assigns.

4.       Nothing herein  contained shall limit or affect in any manner or degree
         the normal and usual  powers of  management,  exercised by the officers
         and the Board of Directors or committees  thereof, to change the duties
         or the character of employment of any employee of the Corporation or to
         remove the  individual  from the  employment of the  Corporation at any
         time, all of which rights and powers are expressly reserved.

5.       No award  will be paid to a  Program  participant  who is not a regular
         full-time  employee in good standing at the end of the calendar year to
         which the award  applies;  except an award  which  would  otherwise  be
         payable based on goal  achievement  may be  recommended in the event of
         retirement,  disability  or death or in the  event the  participant  is
         discharged  without cause from the employment of the company during the
         year.

6.       The  awards  made  to  employees   shall  become  a  liability  of  the
         Corporation or the  appropriate  subsidiary as of December 31, 1998 and
         all payments to be made  hereunder  will be made as soon as practicable
         after said awards have been approved.
</TABLE>
<TABLE>

ADMINISTRATIVE GUIDELINES

- - -------------------------------------------------------------------------------------------------------------------
<CAPTION>
<S>      <C>

1.       Award  values  will be based on  annualized  salary in effect  for each
         qualifying  participant  at the  beginning of the year (March 1 for the
         eighteen most senior executives).  Any change in duties,  dimensions or
         responsibilities  of a current  position  resulting in a new evaluation
         and an increase or  decrease  in  reference  points will be applied for
         Incentive  Program  purposes  on a prorata  basis  with the  respective
         reference  point and  target  incentive  value to apply for the  actual
         number of full months of service at each  evaluation  except for such a
         change with  respect to a Named  Executive  Officer,  in which case any
         change in reference  points and target incentive value, for any reason,
         shall not become effective until January 1 of the following year.

2.       As provided by the Program,  no award is to be paid any participant who
         is not a regular full-time  employee in good standing at the end of the
         calendar  year to which the  award  applies.  However,  in the event an
         eligible participant with three (3) or more months of active service in
         the Program year subsequently retires,  becomes disabled or dies, or is
         discharged  from the  employment  of the  Company  without  cause,  the
         participant (or beneficiary) may receive an award which would otherwise
         be payable based on goal achievement, prorated for the actual months of
         active service during the year.

3.       Employees  participating in any other incentive or bonus program of the
         parent  Corporation or a Subsidiary who are transferred during the year
         to a position covered by the Annual Management Incentive Program (other
         than a Named Executive Officer) will be eligible to receive a potential
         award  prorated for actual full months of service in the two  positions
         with the respective  incentive  program and target  incentive values to
         apply. For example, a Marketing Manager promoted to Director, Marketing
         on August  1, will be  eligible  to  receive a prorata  award for seven
         months based on the Marketing  Manager Plan provisions and values,  and
         for  five  months  under  the  Annual   Management   Incentive  Program
         provisions and target incentive values.

4.       In the event of transfer of an employee  (other than a Named  Executive
         Officer) from an assignment which does not qualify for participation in
         any  incentive  or bonus plan to a position  covered by the 1998 Annual
         Management  Incentive Program,  the employee is eligible to participate
         in the Annual  Incentive  Program with any potential award prorated for
         the actual  months of service in the  position  covered by the  Program
         during the year.  A minimum of three  months of service in the eligible
         position is required.

5.       Participation  during the current Program year for individuals employed
         from outside the  Corporation is possible with any award to be prorated
         for actual full months of service in the eligible  position.  A minimum
         of three full months of service is required for award consideration.

6.       Exceptions to established administrative guidelines can only be made by
         the Subcommittee and only with respect to participants other than Named
         Executive Officers.

7.       For purposes of this Program,  a "NAMED EXECUTIVE OFFICER" will include
         any  executive  officer who is deemed a "named  executive  officer" for
         1998  under  Item 402  (a)(3) of  Regulation  S-K under the  Securities
         Exchange  Act  of  1934  and  was  employed  by  the  Corporation  or a
         Subsidiary on the last day of the year.
</TABLE>


                                   EXHIBIT 13


                                 USG CORPORATION
                                FINANCIAL REVIEW

<TABLE>
                  <S>                                                                                 <C>
                                                                                                      Page

                  MANAGEMENT'S DISCUSSION AND ANALYSIS                                                33

                  CONSOLIDATED FINANCIAL STATEMENTS
                  Statement of Earnings                                                               42
                  Balance Sheet                                                                       43
                  Statement of Cash Flows                                                             44
                  Statements of Stockholders' Equity and Comprehensive Income                         45

                  NOTES TO FINANCIAL STATEMENTS
                  1.  Significant Accounting Policies                                                 46
                  2.  Earnings Per Share                                                              48
                  3.  Common Stock                                                                    48
                  4.  Debt                                                                            49
                  5.  Financing Arrangements                                                          50
                  6.  Financial Instruments and Risk Management                                       50
                  7.  Purchase of Subsidiary Minority Interest                                        51
                  8.  Inventories                                                                     51
                  9.  Property, Plant and Equipment                                                   51
                  10. Leases                                                                          51
                  11. Income Taxes                                                                    52
                  12. Employee Retirement Plans                                                       53
                  13. Stock-Based Compensation                                                        54
                  14. Segments                                                                        55
                  15. Litigation                                                                      56



                  REPORT OF MANAGEMENT

                  REPORT OF INDEPENDENT PUBLIC ACCOUNTANTS                                            60

                  SELECTED QUARTERLY FINANCIAL DATA                                                   61

                  FIVE-YEAR SUMMARY                                                                   62
</TABLE>

MANAGEMENT'S DISCUSSION AND ANALYSIS OF RESULTS OF OPERATIONS AND FINANCIAL
CONDITION

Consolidated Results

NET SALES

USG's net sales in 1998 were a record $3.13 billion, up 9% from $2.87 billion in
1997.  Conditions  in  all  segments  of the  U.S.  construction  industry  were
favorable  in 1998.  The  highest  level of U.S.  housing  starts in more than a
decade  and  continued  growth  of repair  and  remodel  activity  led to record
shipments and selling prices of SHEETROCK brand gypsum wallboard.  Strong demand
from the nonresidential construction market produced record shipments of ceiling
tile and DONN brand suspension grid. These results reflect a continuation of the
favorable trends experienced in 1997, when net sales increased 11% versus 1996.

A bar chart entitled "Net Sales  (millions of dollars)" on page 17 of the Annual
Report to  Stockholders  shows  that for the  years  1996,  1997 and  1998,  the
Corporation had net sales of $2,590 million,  $2,874 million and $3,130 million,
respectively.

GROSS PROFIT

Gross profit as a percentage of net sales was 28.2% in 1998, compared with 27.4%
in 1997 and 24.9% in 1996. Gross margins improved in 1998 and 1997 primarily due
to higher  selling  prices and lower unit  costs each year for  SHEETROCK  brand
wallboard.

SELLING AND ADMINISTRATIVE EXPENSES

Selling and administrative expenses increased to $299 million in 1998, from $281
million in 1997 and $268 million in 1996.  However,  selling and  administrative
expenses as a percent of net sales  improved to 9.6% in 1998,  from 9.8% in 1997
and 10.3% in 1996. The increase in expense dollars in 1998 primarily  relates to
marketing programs and information technology initiatives.  The increase in 1997
versus 1996 primarily  reflects  higher levels of expenses  related to incentive
compensation  and benefits as well as costs to consolidate and upgrade  customer
service functions for the gypsum and ceilings businesses.

AMORTIZATION OF EXCESS REORGANIZATION VALUE

The noncash,  no-tax-impact  amortization of excess  reorganization value, which
concluded  September 30, 1997,  reduced operating profit by $127 million in 1997
and by $169 million in 1996.  Excess  reorganization  value was  established  in
connection with USG's 1993 financial  restructuring that was accounted for using
the  principles  of fresh  start  accounting.  See "Note 11.  Income  Taxes" for
additional information related to this amortization.

INTEREST  EXPENSE

Interest  expense  declined  in 1998  and 1997 as a  result  of debt  reduction.
Interest  expense of $53  million in 1998 was down 12% from $60 million in 1997.
This followed a 20% decrease in 1997 from $75 million in 1996.

INCOME TAXES

Income tax expense amounted to $202 million in 1998,  compared with $172 million
in 1997 and $117 million in 1996. In 1997 and 1996, the Corporation's income tax
expense was computed  based on pretax  earnings  excluding the  amortization  of
excess  reorganization  value, which was not deductible for income tax purposes.
The Corporation's  effective tax rates for 1998, 1997 and 1996 were 37.8%, 53.9%
and 88.9%,  respectively.  Excluding the  amortization of excess  reorganization
value, the Corporation's 1997 and 1996 effective tax rates were 38.6% and 38.9%,
respectively. See "Note 11. Income Taxes" for additional information.

NET EARNINGS

Net earnings in 1998 were a record $332 million. Diluted earnings per share were
$6.61. In 1997, net earnings of $148 million,  or $3.03 per diluted share,  were
net of the amortization of excess reorganization value of $127 million, or $2.60
per diluted share. In 1996, net earnings  amounted to $15 million,  or $0.31 per
diluted  share.   These  results  were  net  of  the   amortizations  of  excess
reorganization  value of $169  million and  reorganization  debt  discount of $1
million,  which together reduced 1996 net earnings by $170 million, or $3.58 per
diluted share.

EBITDA

EBITDA  represents  earnings before interest,  taxes,  depreciation,  depletion,
amortization  and certain other income and expense items.  Because of the effect
on earnings of the amortization of excess reorganization value through September
30, 1997, USG reports EBITDA to facilitate comparisons of current and historical
results.  EBITDA is also  helpful  in  understanding  cash flow  generated  from
operations that is available for taxes,  debt service and capital  expenditures.
EBITDA should not be considered by investors as an  alternative  to net earnings
as an indicator of USG's operating  performance or to cash flows as a measure of
its overall liquidity.

EBITDA of $659 million in 1998 represented a 15% increase versus $572 million in
1997. This followed a 31% increase in 1997 from $437 million in 1996.

A bar chart  entitled  "EBITDA  (millions  of dollars)" on page 17 of the Annual
Report to  Stockholders  shows  that for the  years  1996,  1997 and  1998,  the
Corporation  had  EBITDA  of  $437  million,  $572  million  and  $659  million,
respectively.
<TABLE>

Core Business Results

(millions)                                          Net Sales                                   EBITDA
- - ----------                                          ---------                                   ------
                                          1998         1997          1996           1998         1997         1996
                                          ----         ----          ----           ----         ----         ----
<CAPTION>
<S>                                   <C>          <C>          <C>             <C>          <C>          <C>

North American Gypsum:
U.S. Gypsum Company                   $   1,721    $   1,565    $    1,390      $   533      $   458      $    347
L&W Supply Corporation                    1,103          981           841           44           36            29
CGC Inc. (gypsum)                           145          124           114           25           20            16
Other subsidiaries                           95           95            83           28           28            25
Eliminations                               (488)        (427)         (361)          (1)          (3)            -
                                         ------       ------        ------       ------       ------        ------
Total                                     2,576        2,338         2,067          629          539           417
                                         ------       ------        ------       ------       ------        ------

Worldwide Ceilings:
USG Interiors, Inc.                         446          425           398           66           65            53
USG International                           237          229           228           13           13             2
CGC Inc. (ceilings)                          37           34            30            4            3             3
Eliminations                                (63)         (54)          (44)           -            -             -
                                         ------       ------        ------       ------       ------        ------
Total                                       657          634           612           83           81            58
                                         ------       ------        ------       ------       ------        ------

Corporate                                     -            -             -          (53)         (48)          (38)
Eliminations                               (103)         (98)          (89)           -            -             -
                                         ------       ------        ------       ------       ------        ------
Total USG Corporation                     3,130        2,874         2,590          659          572           437
</TABLE>

NORTH AMERICAN  GYPSUM

Net sales in 1998 were $2.58 billion,  up 10% from $2.34 billion in 1997. EBITDA
in 1998 was $629 million, up 17% from $539 million in 1997. Net sales and EBITDA
in 1997 increased 13% and 29%, respectively, versus 1996.

A bar chart entitled "Net Sales  (millions of dollars)" on page 18 of the Annual
Report to  Stockholders  shows  that for the years  1996,  1997 and 1998,  North
American  Gypsum  had net sales of $2,067  million,  $2,338  million  and $2,576
million, respectively. A bar chart entitled "EBITDA (millions of dollars)" shows
that for the years 1996, 1997 and 1998, North American Gypsum had EBITDA of $417
million, $539 million and $629 million, respectively.

United States Gypsum Company:  Strong results in 1998 for U.S. Gypsum  primarily
reflect  records for average  price and  shipments  of  SHEETROCK  brand  gypsum
wallboard.  The average  selling price of SHEETROCK  brand wallboard in 1998 was
$129.50 per thousand  square feet, up 6% compared with the 1997 average price of
$122.65.  The average  price in 1996 was $110.56.  Shipments of SHEETROCK  brand
wallboard  totaled 8.8 billion  square feet in 1998,  compared  with 8.4 billion
square feet in 1997 and 8.0 billion square feet in 1996. In addition,  shipments
of SHEETROCK  brand joint  compound and DUROCK brand cement board set records in
1998. U.S. Gypsum's manufacturing costs for SHEETROCK brand wallboard were lower
in 1998 largely due to lower prices for wastepaper,  the primary raw material of
wallboard  paper.  Comparing  1997 with 1996,  lower unit costs were largely the
result of improved operating efficiencies resulting from cost-reduction projects
implemented in those years. U.S. Gypsum's plants operated at 100% of capacity in
1998,  compared  with the estimated  average rate of 99% for the U.S.  wallboard
industry.

L&W Supply Corporation: Net sales for L&W Supply, the leading specialty building
products  distribution  business in the United  States,  exceeded  $1.1 billion,
establishing a new record.  This performance  reflects record sales of wallboard
and  complementary  building  materials.  EBITDA  for L&W  Supply  has  improved
significantly  in each of the  past  three  years as a  result  of gross  profit
improvements  for all of its product  lines.  In 1998, L&W Supply added a net 11
locations,  bringing the total to a record 187. In addition, L&W Supply's market
representation increased to 36 states from 34.

CGC Inc.: The gypsum business of USG's principal Canadian subsidiary experienced
improved net sales and EBITDA in both 1998 and 1997. These trends reflect higher
SHEETROCK brand wallboard  selling prices and increased  wallboard  shipments in
Canada and exports to the United States.

WORLDWIDE CEILINGS

Net sales in 1998 were $657 million,  up 4% from $634 million in 1997. EBITDA in
1998 was $83 million,  compared  with $81 million in 1997.  Record  shipments of
ceiling tile and DONN brand  suspension grid were  attributable to strong demand
in the U.S.  nonresidential  market (both new  construction  and renovation) and
favorable demand in Western Europe and Latin America. USG's international sales,
which are primarily  concentrated  in Western  Europe,  have not been materially
affected by economic problems in Asia and Russia.

Comparing 1997 with 1996, net sales  increased 4% to $634 million,  while EBITDA
increased 40% to $81 million. Adjusting for a $7 million charge taken in 1996 to
improve  operating  efficiencies for USG's European  businesses,  EBITDA in 1997
increased 25%. The higher level of sales reflects improved sales of ceiling tile
and DONN brand suspension grid. EBITDA in 1997 was favorably  affected by higher
volume  and  prices,  reduced  manufacturing  costs and  improved  international
operating efficiencies.

A bar chart entitled "Net Sales  (millions of dollars)" on page 19 of the Annual
Report to Stockholders  shows that for the years 1996, 1997 and 1998,  Worldwide
Ceilings  had  net  sales  of $612  million,  $634  million  and  $657  million,
respectively. A bar chart entitled "EBITDA (millions of dollars)" shows that for
the years 1996, 1997 and 1998, Worldwide Ceilings had EBITDA of $58 million, $81
million and $83 million, respectively.

Market Conditions and Outlook

Industry  shipments  of  wallboard  in the  United  States  grew  in  1998 to an
estimated 28.2 billion square feet, a record level and a 6% rise from 1997. This
increase was supported by growth in new residential  construction and repair and
remodel activity. Very strong demand from nonresidential construction was also a
contributing factor.

Based on preliminary data issued by the U.S. Bureau of the Census,  U.S. housing
starts in 1998 were an estimated 1.616 million units, up 10% over 1997. Although
management believes that new residential construction may not maintain this high
level in 1999,  housing starts are expected to  approximate  the healthy pace of
the past several  years.  Housing starts totaled 1.474 million units in 1997 and
1.477 million units in 1996.

The  repair  and  remodel  market is the  fastest  growing  segment  for USG and
accounts for the  second-largest  portion of its sales.  Opportunity from repair
and remodel activity  continued to grow in 1998,  increasing  approximately  7%.
Sales of existing  homes were a record 4.8 million  units in 1998.  Because many
buyers  remodel an existing home within 18 months of purchase,  the  residential
repair and remodel market should be healthy over the next several years.  Repair
and remodel  activity  is  expected  to  continue  to account for an  increasing
proportion of USG's sales.

Sales of USG products to the  nonresidential  construction  market  increased in
1998 and are expected to remain  strong in 1999.  Future demand for USG products
from new  nonresidential  construction  is  gauged  by  floor  space  for  which
contracts  are signed.  Installation  of gypsum and  ceilings  products  follows
signing of the  construction  contract  by about a year.  Floor  space for which
contracts  were  signed  rose 10% in 1997  and  increased  5% in 1998,  although
segments  that are most  relevant to USG's  business,  such as offices,  stores,
hotels and motels, grew at a much higher rate.

Most of USG's  sales  outside of the United  States  come from  Canada,  Western
Europe and Latin America.  USG's  exposure to the economic  problems of Asia and
Russia is small. Conditions in Canadian construction are expected to be positive
in 1999, as is the outlook for Western  Europe and Latin  America,  despite some
economic uncertainties in each region.

Liquidity and Capital Resources

FINANCIAL STRATEGY

USG is executing a strategy to create future earnings growth through  investment
in its businesses and immediate returns to investors through dividends and share
repurchases.

Earnings  Growth:  USG's plan for  earnings  growth  includes:  introducing  new
products and product  platforms;  improving  service;  strengthening its brands;
adding capacity to serve growing customers and markets; renovating manufacturing
capacity  to  make  USG  the  undisputed   low-cost   producer;   and  expanding
distribution. USG anticipates that these initiatives will also reduce the impact
of cyclicality on its earnings.

Dividends:  In  September  1998,  USG's board of  directors  voted to initiate a
quarterly cash dividend of $0.10 per share, beginning in December 1998. This was
the first cash dividend USG has paid since 1988.

Share  Repurchases:  USG has also begun a  multiyear  share-repurchase  program,
under which it will repurchase up to 5 million shares,  or approximately  10% of
USG's common stock currently  outstanding.  Share  repurchases are being made in
the open  market or  through  privately  negotiated  transactions  and are being
financed with available cash from  operations.  As of December 31, 1998, USG had
purchased 225,000 shares. See "Note 3. Common Stock" for additional information.

CAPITAL EXPENDITURES

Capital spending amounted to $309 million in 1998, compared with $172 million in
1997.  As  of  December  31,  1998,  capital  expenditure  commitments  for  the
replacement, modernization and expansion of operations amounted to $481 million,
compared with $363 million as of December 31, 1997.  USG's capital  expenditures
program includes the following projects:

A bar chart entitled "Capital Spending  (millions of dollars)" on page 21 of the
Annual Report to Stockholders  shows that for the years 1996, 1997 and 1998, USG
had  capital   spending  of  $120  million,   $172  million  and  $309  million,
respectively.

Wallboard  Capacity  Modernization  and  Expansion:  As a major  part  of  USG's
earnings growth strategy,  U.S. Gypsum is replacing high-cost wallboard capacity
with new,  low-cost  plants  and  lines.  These  projects  also will add a net 2
billion  square feet of capacity to serve growing  markets and customers in five
regions of the United States.

In the Southeast,  construction  of a new plant in  Bridgeport,  Ala., is nearly
complete. This facility,  which will manufacture SHEETROCK brand wallboard using
100% synthetic  gypsum,  is expected to begin operation in the second quarter of
1999.

In the Midwest,  U.S.  Gypsum is building a new  production  line for  SHEETROCK
brand wallboard at its East Chicago, Ind., plant. This new line is scheduled for
startup in the fourth quarter of 1999.

In the  Northeast,  ground  was  broken  in 1998  for a new  wallboard  plant in
Aliquippa,  Pa. The Aliquippa plant will  manufacture  SHEETROCK brand wallboard
using 100%  synthetic  gypsum.  Construction  of this facility is expected to be
completed in early 2000.

In September 1998, U.S. Gypsum announced the following two projects,  one in the
Northwest  and one in the  Southwest,  both of which  are  expected  to be fully
operational in 2001.

In the Northwest,  a new facility to be located in Rainier, Ore., will include a
142,000-square-foot  manufacturing plant and a 247,000-square-foot  distribution
center.  The facility will serve the wallboard needs of the northwestern  United
States and western Canada. A significant portion of the new capacity provided by
this plant will replace  existing USG  shipments  into the region from plants as
far away as Iowa, Texas and Ontario, Canada.

In the Southwest,  a new production line at U.S. Gypsum's plant in Plaster City,
Calif., will provide annual capacity of 700 million square feet of wallboard and
replace a 41-year-old, high-cost production line.

Gypsum  Fiber  Project:  Construction  continues  on a facility  to  manufacture
FIBEROCK  brand  gypsum  fiber  panels,  USG's  newest  product  platform.  This
production line, which is being built at the Gypsum,  Ohio,  wallboard plant, is
scheduled  for  startup in the third  quarter of 1999.  It will  complement  the
gypsum fiber panel plant in Port Hawkesbury, Nova Scotia, acquired in 1997.

Cost-Reduction  Projects:  Additional capital investments include cost-reduction
projects such as the installation of  stock-cleaning  equipment to utilize lower
grades of recycled  paper and process  control  upgrades to improve raw material
usage and operating efficiencies.

Ceiling Tile Capacity Modernization:  A project that replaced two old production
lines with one modern,  high-speed  line at the  ceiling  tile plant in Cloquet,
Minn.,  was completed  during the first quarter of 1998.  The startup of the new
line  occurred  during  the  second  quarter,  and  the new  line  is now  fully
operational.

WORKING CAPITAL

Working  capital  (current  assets less current  liabilities) as of December 31,
1998,  amounted  to $368  million,  and the ratio of  current  assets to current
liabilities  was 1.9 to 1. As of December  31,  1997,  working  capital was $264
million, and the ratio of current assets to current liabilities was 1.7 to 1.

Receivables increased to $349 million as of December 31, 1998, from $297 million
as of  December  31,  1997.  Inventories  increased  to $234  million  from $208
million,  and accounts  payable rose to $157  million from $146  million.  These
variations reflect the increased level of business in 1998.

Cash and cash equivalents as of December 31, 1998,  amounted to $152 million, an
increase of $80 million from the December 31, 1997, level. During 1998, net cash
flows from operating and financing activities were $374 million and $13 million,
respectively, while net cash flows to investing activities were $307 million.

Net cash flows  related to financing  activities  included  cash proceeds of $40
million from the exercise of  approximately  2.46 million warrants issued on May
6, 1993,  in connection  with a debt  restructuring.  Each warrant  entitled the
holder to purchase  one share of USG common  stock at a price of $16.14 any time
prior to May 6, 1998.  The proceeds  from the  exercises  were added to the cash
resources of the Corporation and used for general corporate purposes.

DEBT

Total debt  amounted to $596  million as of December  31,  1998,  down from $620
million as of year end 1997.  During  1998,  USG  retired  $67  million of 8.75%
debentures,  increased  industrial  revenue  bonds by $38 million and  increased
seasonal foreign borrowings by $5 million.

USG intends to retire in 1999 the remaining $25 million of 8.75%  debentures due
2017 and,  therefore,  has  classified  this debt as a current  liability on its
consolidated balance sheet.

A bar chart  entitled  "Total Debt (as of December 31 - millions of dollars)" on
page 21 of the Annual Report to Stockholders shows that for the years 1996, 1997
and 1998,  USG had total debt of $772  million,  $620 million and $596  million,
respectively.

AVAILABLE LIQUIDITY

The Corporation has additional  liquidity  available  through several  financing
arrangements.  Revolving  credit  facilities  in the United  States,  Canada and
Europe  allow  the  Corporation  to borrow up to an  aggregate  of $605  million
(including a $125 million letter of credit  subfacility  in the United  States),
under which, as of December 31, 1998,  outstanding  revolving loans totaled $104
million and letters of credit  issued and  outstanding  amounted to $20 million,
leaving the Corporation with $481 million of unused and available credit.

The Corporation had additional  borrowing capacity of $50 million as of December
31, 1998, under a revolving accounts receivable facility. See "Note 5. Financing
Arrangements."

A shelf registration statement filed with the Securities and Exchange Commission
allows the  Corporation  to offer from time to time debt  securities,  shares of
preferred and common stock or warrants to purchase  shares of common stock,  all
having an aggregate initial offering price not to exceed $300 million. As of the
filing date of the Corporation's  1998 Annual Report on Form 10-K, no securities
had been issued pursuant to this registration.

Other Matters

MARKET RISK

In the normal  course of business,  USG uses  financial  instruments,  including
fixed and variable rate debt, to finance its operations.  In addition,  USG uses
derivative  instruments to manage  well-defined  interest rate,  energy cost and
foreign currency exposures.  USG does not use derivative instruments for trading
purposes.

Interest Rate Risk: The table below provides  information  about USG's financial
instruments that are sensitive to changes in interest rates,  specifically  debt
obligations and interest rate swaps.  For debt  obligations,  the table presents
principal  cash flows and related  weighted  average  interest rates by expected
maturity dates. For interest rate swaps, the table presents notional amounts and
weighted  average  interest  rates by  expected  (contractual)  maturity  dates.
Notional amounts are used to calculate the contractual  payments to be exchanged
under the contract. Weighted average variable rates are based on implied forward
rates at the  reporting  date.  The  information  is  presented  in U.S.  dollar
equivalents, which is USG's reporting currency.
<PAGE>
<TABLE>

(dollars in millions)                             Maturity Date
                      -----------------------------------------------------------------
                         1999       2000       2001       2002       2003    Thereafter        Total       Fair Value
                         ----       ----       ----       ----       ----    ----------        -----       ----------
<CAPTION>
<S>                   <C>         <C>       <C>       <C>         <C>       <C>              <C>           <C>
Debt
U.S. Dollar:
Fixed rate            $    25           -   $   150   $      1          -   $       236      $   412       $     435
Average interest rate     8.8%          -       9.3%       7.1%         -           6.3%         7.2%
Variable rate               -           -         -   $     25    $    40   $        40      $   105       $     105
Average interest rate       -           -         -        5.7%       5.6%          5.6%         5.6%

Canadian Dollar:
Variable rate               -           -         -   $     69          -             -      $    69       $      69
Average interest rate       -           -         -        5.4%         -             -          5.4%

European Multicurrency Line:
Variable rate         $    10           -         -          -          -             -      $    10       $      10
Average interest rate     3.8%          -         -          -          -             -          3.8%

Interest Rate Swaps
U.S. Dollar:
Notional amount             -    $     25   $    80          -          -             -      $   105       $      (8)
Average pay rate            -         7.2%      8.2%         -          -             -          8.1%
Average receive rate        -         5.1%      5.2%         -          -             -          5.2%

Canadian Dollar:
Notional amount             -           -   $    26          -          -             -      $    26               -
Average pay rate            -           -       5.5%         -          -             -          5.5%
Average receive rate        -           -       5.0%         -          -             -          5.0%
</TABLE>



Foreign  Currency  Exchange  Risk:  The table  below  summarizes  USG's  foreign
currency  forward  contracts  as of December 31,  1998.  The table  presents the
notional  amounts (in millions of U.S. dollar  equivalents) and weighted average
contract rates. All outstanding foreign currency forward contracts mature within
12 months.

<TABLE>

   Currency             Currency             Notional        Contract
     Sold               Purchased             Value            Rate
<CAPTION>
<S>                  <C>                  <C>                  <C>

British Pounds       Belgian Francs       $     8               56.25
Australian Dollars   New Zealand Dollars        1                1.20
U.S. Dollars         Canadian Dollars          40                1.49
Australian Dollars   U.S. Dollars               3                0.64
Singapore Dollars    U.S. Dollars               1                1.60
Belgian Francs       U.S. Dollars               7               33.95
</TABLE>

Commodity  Price Risk:  USG uses  natural  gas swap  contracts  to manage  price
exposure on anticipated natural gas purchases.  A sensitivity  analysis has been
prepared  to  estimate  the  potential  loss in fair  value of such  instruments
assuming a hypothetical 10% increase in market prices. The sensitivity  analysis
includes the underlying exposures that are being hedged. Based on the results of
the sensitivity analysis,  which may differ from actual results, USG's potential
loss in fair value is $8 million.

See "Note 1. Significant Accounting Policies" and "Note 6. Financial Instruments
and Risk Management" for additional information on USG's financial exposures.

STOCKHOLDER RIGHTS PLAN

On March 27, 1998,  the  Corporation  approved the  redemption  of the preferred
share purchase rights declared under a 10-year rights  agreement  adopted in May
1993 and adopted a new share  purchase  rights plan. The new plan is designed to
strengthen  the previous  provisions  assuring fair and equal  treatment for all
stockholders in the event of any  unsolicited  attempt to acquire USG. See "Note
3. Common Stock" for additional information.

YEAR 2000 COMPLIANCE

In 1996, USG began an evaluation of its computer-based  systems to determine the
extent of the  modifications  required to make those systems year 2000 compliant
and to devise a plan to complete  such  modifications  prior to January 1, 2000.
The plan that was devised is divided into five phases:  identification  (a basic
inventory of all systems), assessment,  remediation, testing and completion. The
plan encompasses all of USG's computer systems  including  mainframe,  midrange,
client server and desktop systems as well as all specialized control systems for
plant  operations  or other  facilities  including  those  that  are  considered
embedded  systems.  USG's  mainframe  systems  are  responsible  for most of the
information  processing  done by the  Corporation and will receive a majority of
the  efforts  dedicated  to this  project  as well as a  majority  of the budget
allocated to it.

Of the plan phases, identification and assessment are essentially completed, and
the  process of  modification,  encompassing  the three  phases of  remediation,
testing and  completion,  is  substantially  under way. As of December 31, 1998,
approximately  84% of the planned  modifications to USG's mainframe  systems had
been  completed.  The  remaining 16% of the  modifications  are currently in the
process of remediation,  testing and completion and are expected to be completed
by the second quarter of 1999.  With respect to the midrange,  client server and
desktop  systems,  upgrading  to these  systems is expected to be  completed  by
mid-1999.  With respect to embedded  systems,  all operations have been assessed
and remediation  plans,  where necessary,  are under way. All necessary upgrades
and remediation are scheduled for completion by the middle of 1999. For purposes
of this description,  embedded systems are intended to cover manufacturing plant
control  equipment  and  building  information  and  mechanical  systems such as
telecommunication   systems,   HVAC,   security  systems  and  other  monitoring
equipment.

USG's  year  2000   compliance  plan  also  includes  an  analysis  of  critical
third-party  suppliers of material  and  services to  determine  their year 2000
compliance  status.  Virtually  all  critical  suppliers  to U.S.  and  Canadian
operations have been surveyed  regarding their compliance  status. Any remaining
unsurveyed  critical  suppliers and those  supporting  other  operations will be
contacted by early 1999. At this point,  based on responses received to date, it
is not  possible  to  forecast  whether  there  will be, or the  extent  of, any
significant  disruption due to third-party supplier failures.  However, the plan
contemplates  that USG will be in ongoing  contact with its  critical  suppliers
through at least January 1, 2000, to assure that those suppliers either are able
to continue to perform without disruption or where feasible are replaced by ones
that  can so  perform.  USG  also has been in  contact  with  most of its  major
customers on the status of each party's year 2000  compliance  plans and expects
to continue  such  information  exchanges  through  January 1, 2000, in order to
maintain those business  relationships and to obtain updated information for its
own ongoing contingency planning.

The cost of carrying out USG's  compliance  plan is  currently  estimated at $12
million.  In the Corporation's  third-quarter  report for 1998, it was projected
that by the end of the fourth  quarter of 1998,  64% of the total  budget  would
have  been  spent.  Due to  timing  differences  and  decreases  in  the  actual
expenditures for certain items as compared to budget,  the total amount incurred
as of December 31, 1998,  was actually 47%. The remainder will be spent in 1999,
most of it in the first half.

At this time,  USG expects to be internally  compliant with respect to year 2000
issues by the middle of 1999. It is too soon to know whether it might experience
significant  disruptions  due to year 2000  problems  that affect the  operating
environment in which it conducts business such as disruptions to transportation,
communications  and  electric  power or  other  energy  systems  or due to other
similar  causes.  However,  the  inability of USG or its critical  suppliers and
customers  to  effectuate  solutions to their  respective  year 2000 issues on a
timely and cost-effective basis may have a material adverse effect on USG.

In view of the uncertainties that USG faces with respect to year 2000 issues, it
has begun to  formulate  contingency  plans to provide for  continuation  of its
operations  in the  event of  possible  year 2000  disruptions.  It  expects  to
complete an initial version of its contingency planning by midyear 1999, but its
plans will be continually evaluated and modified as required by developments and
circumstances that may emerge between now and January 1, 2000.

EURO CURRENCY CONVERSION

Effective  January  1,  1999,  11 of the 15  countries  that are  members of the
European Union  introduced a new, single currency unit, the euro.  Prior to full
implementation of the new currency for the participating countries on January 1,
2002, there will be a three-year  transition period during which parties may use
either the  existing  currencies  or the euro.  However,  during the  transition
period,  all exchanges  between  currencies of the  participating  countries are
required to be first converted through the euro.

USG has conducted a  comprehensive  analysis to address the euro currency issue.
USG's  efforts  are  focused on two  phases.  The first  phase  addresses  USG's
European  operations during the transition  period.  The second phase covers the
full  conversion of these  operations to the euro. The  Corporation is ready for
the transition period that began on January 1, 1999, and expects to be ready for
the  full  conversion  by  January  1,  2001,  one year  ahead of the  mandatory
conversion  date.  USG also is prepared to deal with its critical  suppliers and
customers  during  the  transition  period  and will  communicate  with  them as
appropriate.  The  Corporation  does not  expect  the  introduction  of the euro
currency  to  have a  material  adverse  impact  on  its  business,  results  of
operations or financial position.

LEGAL CONTINGENCIES

One of the Corporation's  subsidiaries,  U.S. Gypsum, is a defendant in asbestos
lawsuits  alleging  both  property  damage  and  personal  injury.  U.S.  Gypsum
historically  has accrued $18 million  annually for  asbestos-related  costs. In
view of the high level of personal  injury filings that followed the termination
of the Georgine  settlement,  as discussed in "Note 15. Litigation," U.S. Gypsum
accrued an  additional $8 million in the fourth  quarter of 1998.  Although U.S.
Gypsum  expects  that  this  increased  level of  accrual  will  continue  to be
necessary  during  1999 and  possibly  longer,  the  amount of  future  periodic
accruals will depend upon factors that  include,  but may not be limited to, the
rate at which new  asbestos-related  claims are filed, the imposition of medical
criteria through  legislation or negotiated  agreements,  U.S.  Gypsum's average
settlement  cost and the  necessity of  higher-cost  settlements  in  particular
jurisdictions.  In addition,  U.S. Gypsum will continue to evaluate  whether its
ultimate  probable  liability for future personal injury cases can be reasonably
estimated.  If such an  estimate  can be made,  it is probable  that  additional
charges to results of operations  would be necessary,  although  whether such an
estimate can be made and, if so, the timing and amount of the  resulting  charge
to results of operations cannot presently be determined.  However, the amount of
the periodic and other charges  described  above could be material to results of
operations in the period in which they are taken. The asbestos litigation is not
expected to have a  significant  impact on the  Corporation's  liquidity or cash
flows during 1999.  See "Note 15.  Litigation"  for  additional  information  on
asbestos litigation.

The Corporation and certain of its subsidiaries  have been notified by state and
federal  environmental  protection  agencies of possible  involvement  as one of
numerous "potentially  responsible parties" in a number of so-called "Superfund"
sites in the United States. The Corporation  believes that neither these matters
nor any other known governmental proceeding regarding environmental matters will
have a material  adverse  effect upon its  results of  operations  or  financial
position.  See "Note 15. Litigation" for additional information on environmental
litigation.

Forward-Looking Statements

This  report  contains   forward-looking   statements  related  to  management's
expectations  about future  conditions.  Actual business or other conditions may
differ  significantly from management's  expectations and accordingly affect the
Corporation's  sales and  profitability  or other  results.  Actual  results may
differ  due to factors  over which the  Corporation  has no  control,  including
economic activity such as new housing construction,  interest rates and consumer
confidence;   competitive  activity  such  as  price  and  product  competition;
increases in raw material and energy costs;  risk of disruption due to year 2000
issues such as those described  above;  euro currency issues such as the ability
and willingness of third parties to convert  affected systems in a timely manner
and the actions of governmental agencies or other third parties; and the outcome
of contested  litigation.  The  Corporation  assumes no obligation to update any
forward-looking information contained in this report.
<PAGE>
<TABLE>

                                                  USG CORPORATION
                                         CONSOLIDATED STATEMENT OF EARNINGS




(dollars in millions, except per share data)                                Years Ended December 31,
                                                                  -------------------------------------------
                                                                         1998           1997            1996
                                                                  --------------  ------------   ------------
<CAPTION>
<S>                                                               <C>             <C>            <C>

Net sales.......................................................  $        3,130  $      2,874   $      2,590
Cost of products sold...........................................           2,246         2,087          1,945
                                                                  --------------  ------------   ------------
Gross profit....................................................             884           787            645
   % of net sales...............................................            28.2          27.4           24.9
Selling and administrative expenses.............................             299           281            268
Amortization of excess reorganization value.....................               -           127            169
                                                                  --------------  ------------   ------------
Operating profit................................................             585           379            208
Interest expense................................................              53            60             75
Interest income.................................................              (5)           (3)            (2)
Other expense, net..............................................               3             2              3
                                                                  --------------  ------------   ------------
Earnings before income taxes....................................             534           320            132
Income taxes....................................................             202           172            117
                                                                  --------------  ------------   ------------
Net earnings ...................................................             332           148             15
                                                                  ==============  ============   ============
Net Earnings Per Common Share:
Basic...........................................................            6.81          3.19           0.32
                                                                  ==============  ============   ============
Diluted.........................................................            6.61          3.03           0.31
                                                                  ==============  ============   ============

The notes to financial statements are an integral part of this statement.
</TABLE>
<PAGE>
<TABLE>

                                                  USG CORPORATION
                                            CONSOLIDATED BALANCE SHEET




(dollars in millions, except per share data)                                            As of December 31,
                                                                                -------------------------------
                                                                                     1998                1997
                                                                                ------------       ------------
<CAPTION>
<S>                                                                             <C>                <C>

Assets
Current Assets:
Cash and cash equivalents....................................................   $        152       $         72
Receivables (net of reserves of $18 and $17).................................            349                297
Inventories..................................................................            234                208
Current and deferred income taxes............................................             62                 63
                                                                                ------------       ------------
     Total current assets....................................................            797                640
                                                                                ------------       ------------
Property, plant and equipment, net...........................................          1,214                982
Other assets.................................................................            346                304
                                                                                ------------       ------------
     Total assets............................................................          2,357              1,926
                                                                                ============       ============

Liabilities and Stockholders' Equity
Current Liabilities:
Accounts payable.............................................................            157                146
Accrued expenses.............................................................            237                220
Notes payable................................................................             10                  -
Current portion of long-term debt............................................             25                 10
                                                                                ------------       ------------
     Total current liabilities...............................................            429                376
                                                                                ------------       ------------
Long-term debt...............................................................            561                610
Deferred income taxes........................................................            169                163
Other liabilities............................................................            680                630
Stockholders' Equity:
Preferred stock - $1 par  value;  authorized  36,000,000  shares;  $1.80
                  convertible preferred stock (initial series);
                  outstanding - none.........................................              -                  -
Common stock    - $0.10 par value; authorized 200,000,000 shares; outstanding
                  49,524,952 and 46,780,845 shares (after deducting 296,235
                  and 48,919 shares held in treasury)........................              5                  5
Treasury stock    ...........................................................            (10)                 -
Capital received in excess of par value......................................            317                258
Deferred currency translation................................................            (30)               (25)
Reinvested earnings (deficit)................................................            236                (91)
                                                                                ------------       ------------
     Total stockholders' equity .............................................            518                147
                                                                                ------------       ------------
     Total liabilities and stockholders' equity..............................          2,357              1,926
                                                                                ============       ============


The notes to financial statements are an integral part of this statement.
</TABLE>
<PAGE>
<TABLE>

                                                 USG CORPORATION
                                       CONSOLIDATED STATEMENT OF CASH FLOWS



(millions)                                                                   Years Ended December 31,
                                                                  --------------------------------------------
                                                                       1998           1997            1996
                                                                  --------------  ------------   -------------
<CAPTION>
<S>                                                               <C>             <C>            <C>

Operating Activities
Net earnings ...................................................  $          332  $        148   $          15
Adjustments to Reconcile Net Earnings to Net Cash:
   Amortization of excess reorganization value..................               -           127             169
   Depreciation, depletion and amortization.....................              81            70              65
   Current and deferred income taxes............................               7            (2)             (8)
   Net gain on asset dispositions...............................               -            -               (2)
(Increase) Decrease in Working Capital:
   Receivables..................................................             (52)          (23)            (28)
   Inventories..................................................             (26)          (23)            (10)
   Payables.....................................................              11             5              10
   Accrued expenses.............................................              17            20              14
(Increase) decrease in other assets.............................               6           (10)             (2)
Increase in other liabilities...................................               -            19              64
Other, net......................................................              (2)            1              (4)
                                                                  --------------  -------------   ------------
   Net cash from operating activities...........................             374           332             283
                                                                  --------------  -------------   ------------

Investing Activities
Capital expenditures............................................            (309)         (172)           (120)
Net proceeds from asset dispositions............................               2             2              10
Purchase of subsidiary minority interest........................               -             -             (49)
                                                                  --------------  -------------   ------------
   Net cash to investing activities ............................            (307)        (170)            (159)
                                                                  --------------  -------------   ------------

Financing Activities
Issuance of debt................................................              78           116              77
Repayment of debt...............................................            (107)         (265)           (231)
Short-term borrowings (repayments), net.........................               9            (3)              -
Issuances of common stock.......................................              48            18               4
Purchases of common stock.......................................             (10)            -               -
Cash dividends paid.............................................              (5)            -               -
                                                                  --------------  -------------   ------------
   Net cash from (to) financing activities......................              13          (134)           (150)
                                                                  --------------  -------------   ------------

Net Increase (Decrease) in Cash and Cash Equivalents............              80            28             (26)
Cash and cash equivalents at beginning of period................              72            44              70
                                                                  --------------  -------------   ------------
Cash and cash equivalents at end of period......................             152            72              44
                                                                  ==============  =============   ============

Supplemental Cash Flow Disclosures:
Interest paid...................................................              56            64              74
Income taxes paid...............................................             186           168             116


The notes to financial statements are an integral part of this statement.
</TABLE>
<PAGE>
<TABLE>

                                                    USG CORPORATION
                      CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY AND COMPREHENSIVE INCOME



                                                                              Years Ended December 31,
                                                                  -------------------------------------------

(millions)                                                             1998           1997            1996
                                                                  -------------   ------------   ------------
<CAPTION>
<S>                                                               <C>             <C>            <C>



Stockholders' Equity
Common Stock:
Balance at January 1..............................................$            5  $          5   $          5
Balance at December 31............................................             5             5              5
                                                                  --------------  ------------   ------------

Treasury Stock:
Balance at January 1..............................................             -             -              -
Purchases of common stock.........................................           (10)            -              -
                                                                  --------------  ------------   ------------
Balance at December 31............................................           (10)            -              -
                                                                  --------------  ------------   ------------

Capital Received in Excess of Par Value:
Balance at January 1..............................................           258            231            223
Issuances of common stock.........................................            48             18              4
Other, net........................................................            11              9              4
                                                                  --------------  -------------   ------------
Balance at December 31............................................           317            258            231
                                                                  --------------  -------------   ------------

Reinvested Earnings (Deficit):
Balance at January 1..............................................           (91)          (239)          (254)
Net earnings......................................................           332            148             15
Cash dividends paid...............................................            (5)             -              -
                                                                  --------------  -------------   ------------
Balance at December 31............................................           236            (91)          (239)
                                                                  --------------  -------------   ------------

Accumulated Other Comprehensive Income:
Balance at January 1..............................................           (25)           (20)           (11)
Other comprehensive income........................................            (5)            (5)            (9)
                                                                  --------------  -------------  -------------
Balance at December 31............................................           (30)           (25)           (20)
                                                                  --------------  -------------  -------------

Total stockholders' equity (deficit)..............................           518            147            (23)
                                                                  ==============  =============  =============


Comprehensive Income
Net earnings......................................................$          332  $        148   $          15
                                                                  --------------  -------------  -------------

Other Comprehensive Income (net of tax):
Foreign currency translation adjustments..........................           (5)           (15)             (4)
Minimum pension liability.........................................            -             10              (5)
                                                                  --------------  ------------   -------------
                                                                             (5)            (5)             (9)
                                                                  --------------  ------------   -------------

Total comprehensive income........................................          327            143               6
                                                                  ==============  ============   =============

The notes to financial statements are an integral part of these statements.
</TABLE>
<PAGE>



                          NOTES TO FINANCIAL STATEMENTS


1.  Significant Accounting Policies

NATURE OF OPERATIONS

Through its  subsidiaries,  USG  Corporation  (the  "Corporation")  is a leading
manufacturer  and distributor of building  materials,  producing a wide range of
products for use in new residential,  new  nonresidential and repair and remodel
construction,  as well as products used in certain industrial  processes.  USG's
operations are organized  into two operating  segments:  North American  Gypsum,
which  manufactures  and markets  gypsum  wallboard and related  products in the
United States, Canada and Mexico, and Worldwide Ceilings, which manufactures and
markets  ceiling  tile,   ceiling  grid  and  other  interior  systems  products
worldwide.  USG's products are distributed  through its wholly owned subsidiary,
L&W Supply  Corporation,  as well as through building  materials  dealers,  home
improvement centers and other retailers,  specialty wallboard distributors,  and
contractors.

CONSOLIDATION

The consolidated  financial  statements  include the accounts of the Corporation
and its subsidiaries. All significant intercompany balances and transactions are
eliminated in consolidation.

USE OF ESTIMATES

The preparation of financial  statements in conformity  with generally  accepted
accounting  principles  requires  management to make estimates and  assumptions.
These  estimates  and  assumptions   affect  the  reported  amounts  of  assets,
liabilities,  revenues  and  expenses.  Actual  results  could differ from these
estimates.

RECLASSIFICATIONS

Certain amounts in the prior years' financial  statements and notes thereto have
been reclassified to conform with the 1998 presentation.

REVENUE RECOGNITION

The Corporation recognizes revenue upon the shipment of products.

EARNINGS PER SHARE

Basic  earnings  per share is computed by dividing  net earnings by the weighted
average number of shares of common stock  outstanding  during the year.  Diluted
earnings per share  includes the dilutive  effect of the  potential  exercise of
outstanding stock options and warrants under the treasury stock method.

COMPREHENSIVE INCOME

In 1998, the Corporation  adopted  Statement of Financial  Accounting  Standards
("SFAS")  130,  "Reporting   Comprehensive   Income."  For  USG,  components  of
comprehensive income include net earnings,  foreign currency translation gain or
loss adjustments and, for 1997 and 1996, minimum pension liability  adjustments.
Taxes  related to the  minimum  pension  liability  adjustment  for 1997 were $7
million. For the 1996 adjustment,  a $4 million tax benefit was recorded.  There
was no tax impact on the foreign currency translation adjustments.

CASH AND CASH EQUIVALENTS

Cash and cash  equivalents  primarily  consist of time  deposits  with  original
maturities of three months or less.

INVENTORY VALUATION

Most of the  Corporation's  domestic  inventories  are valued under the last-in,
first-out ("LIFO") method. The remaining  inventories are stated at the lower of
cost or market under the first-in, first-out ("FIFO") or average production cost
methods.  Inventories  include material,  labor and applicable  factory overhead
costs.

PROPERTY, PLANT AND EQUIPMENT

Property,  plant and equipment are stated at cost,  except for those assets that
were  revalued  under  fresh  start  accounting  in  May  1993.  Provisions  for
depreciation  of property,  plant and equipment are determined  principally on a
straight-line  basis over the expected  average useful lives of composite  asset
groups. Depletion is computed on a basis calculated to spread the cost of gypsum
and  other  applicable  resources  over the  estimated  quantities  of  material
recoverable.


EXCESS REORGANIZATION VALUE

In the third  quarter of 1997,  the remaining  balance of excess  reorganization
value was eliminated.  The $83 million balance,  which would have been amortized
through April 1998, was offset by the  elimination  of a valuation  allowance in
accordance  with AICPA  Statement  of Position  90-7,  "Financial  Reporting  by
Entities in  Reorganization  Under the Bankruptcy Code" ("SOP 90-7").  See "Note
11. Income Taxes" for additional  information.  Excess  reorganization value was
recorded  in  1993  in  connection  with a  comprehensive  restructuring  of the
Corporation's debt under the principles of fresh start accounting as required by
SOP 90-7.

GOODWILL

Goodwill is amortized on a  straight-line  basis over a period of 40 years. On a
periodic basis, the Corporation  estimates the future undiscounted cash flows of
the  businesses to which  goodwill  relates in order to ensure that the carrying
value of goodwill has not been impaired. Goodwill is included in other assets on
the consolidated balance sheet.

FINANCIAL INSTRUMENTS

The Corporation  uses  derivative  instruments to manage  well-defined  interest
rate, energy cost and foreign currency  exposures.  The Corporation does not use
derivative  instruments for trading purposes.  The criteria used to determine if
hedge  accounting  treatment is appropriate are (i) the designation of the hedge
to an  underlying  exposure  (ii)  whether or not overall  uncertainty  is being
reduced and (iii) if there is a correlation  between the value of the derivative
instrument and the underlying obligation.

Interest Rate Derivative  Instruments:  The Corporation  utilizes  interest rate
swap  agreements to manage the impact of interest rate changes on its underlying
floating-rate  debt.  These  agreements are designated as hedges and qualify for
hedge accounting.  Amounts payable or receivable under these swap agreements are
accrued as an increase or decrease to interest  expense on a current  basis.  To
the  extent  the  underlying  floating-rate  debt is  reduced,  the  Corporation
terminates  swap  agreements  accordingly  so as  not  to  be  in an  overhedged
position.  In such cases, the Corporation  recognizes gains and/or losses in the
period in which the agreement is terminated.


Energy  Derivative  Instruments:  The Corporation  uses swap agreements to hedge
anticipated purchases of fuel to be utilized in the manufacturing  processes for
gypsum wallboard and ceiling tile. Under these swap agreements,  the Corporation
receives or makes payments based on the  differential  between a specified price
and the actual  closing  price for the current  month's  energy price  contract.
These  contracts  are  designated  as hedges and qualify  for hedge  accounting.
Amounts  payable or  receivable  under these swap  agreements  are accrued as an
increase or decrease to cost of products sold, along with the actual spot energy
cost of the corresponding underlying hedge transaction, the combination of which
amounts to the predetermined specified contract price.

Foreign  Exchange  Derivative  Instruments:  The Corporation has operations in a
number of  countries  and has  intercompany  transactions  among them and,  as a
result,   is  exposed  to  changes  in  foreign  currency  exchange  rates.  The
Corporation  manages  these  exposures  on a  consolidated  basis,  which allows
netting of certain  exposures to take advantage of any natural  offsets.  To the
extent the net exposures are hedged,  forward  contracts are used.  Gains and/or
losses on these  foreign  currency  hedges are  included in net  earnings in the
period in which the exchange rates change.

RESEARCH AND DEVELOPMENT

Research and  development  expenditures  are charged to earnings as incurred and
amounted to $20 million, $19 million and $19 million in the years ended December
31, 1998, 1997 and 1996, respectively.

RECENT ACCOUNTING PRONOUNCEMENT

In 1998, the Financial  Accounting  Standards Board issued SFAS 133, "Accounting
for Derivative  Instruments and Hedging Activities." This statement is effective
for  fiscal  years  beginning  after  June  15,  1999,  and  cannot  be  applied
retroactively. SFAS 133 establishes accounting and reporting standards requiring
that every  derivative  instrument be recorded on the balance sheet as either an
asset or  liability  measured at its fair value.  The  statement  requires  that
changes in the  derivative's  fair value be  recognized  currently  in  earnings
unless  specific hedge  accounting  criteria are met. The  Corporation  plans to
adopt SFAS 133 effective January 1, 2000, and will determine both the method and
impact of adoption prior to that date.
<TABLE>

2.  Earnings Per Share

The  reconciliation of basic earnings per share to diluted earnings per share is
shown in the following table:

(millions, except                  Net         Shares     Per Share
 share data)                    Earnings       (000)       Amount
- - --------------------------------------------------------------------
<CAPTION>
<S>                             <C>            <C>        <C>

1998
Basic earnings                  $  332         48,710     $  6.81

Effect of Dilutive Securities:
Options                                           861
Warrants                                          613
- - --------------------------------------------------------------------
Diluted earnings                   332         50,184        6.61
====================================================================

1997
Basic earnings                     148         46,269        3.19
Effect of Dilutive Securities:
Options                                           930
Warrants                                        1,528
- - --------------------------------------------------------------------
Diluted earnings                   148         48,727        3.03
====================================================================

1996
Basic earnings                      15         45,542        0.32
Effect of Dilutive Securities:
Options                                           853
Warrants                                        1,115
- - --------------------------------------------------------------------
Diluted earnings                    15         47,510        0.31
====================================================================
</TABLE>

3.  Common Stock

TREASURY STOCK

There were  296,235 and 48,919  shares of $0.10 par value  common  stock held in
treasury as of December  31, 1998 and 1997,  respectively.  The increase in 1998
primarily  reflects  shares  acquired  under  the new share  repurchase  program
described below.

CASH DIVIDENDS

In September  1998,  USG's board of directors voted to initiate a quarterly cash
dividend of $0.10 per share.  The first  dividend was paid on December 16, 1998,
to stockholders of record as of November 27, 1998.

SHARE REPURCHASES

In September  1998,  USG's board of directors also voted to initiate a multiyear
share-repurchase program, under which up to 5 million shares of common stock may
be purchased.  Under the program,  USG intends to acquire shares in a systematic
manner to offset the issuance of shares under its long-term equity  compensation
plans for employees and directors.  USG also intends to acquire shares from time
to time that will be utilized  for general  corporate  purposes.  The volume and
timing of the latter  purchases  will depend on market and business  conditions.
Share  repurchases  are  being  made in the open  market  or  through  privately
negotiated  transactions  and  are  being  financed  with  available  cash  from
operations. As of December 31, 1998, USG had purchased 225,000 shares.

STOCKHOLDER RIGHTS PLAN

In March 1998, the  Corporation  approved the redemption of the preferred  share
purchase  rights declared under a 10-year rights  agreement  adopted in 1993 and
adopted a new share  purchase  rights plan.  The new rights  plan,  which became
effective on April 15, 1998,  and will expire on March 27, 2008,  has four basic
provisions.  First, if an acquirer buys 15% or more of USG's outstanding  common
stock,  the plan allows other  stockholders to buy, with each right,  additional
USG shares at a 50%  discount.  Second,  if USG is acquired in a merger or other
business combination transaction,  rights holders will be entitled to buy shares
of the acquiring  company at a 50% discount.  Third, if an acquirer buys between
15% and 50% of USG's outstanding common stock, the Corporation can exchange part
or all of the rights of the other holders for shares of the Corporation's  stock
on a  one-for-one  basis,  or  shares  of the new  junior  preferred  stock on a
one-for-one-hundredth  basis.  Fourth,  before an  acquirer  buys 15% or more of
USG's outstanding common stock, the rights are redeemable for $0.01 per right at
the option of the board of directors.  This provision permits the board to enter
into an acquisition  transaction  that is determined to be in the best interests
of stockholders. The board is authorized to reduce the 15% threshold to not less
than 10%.

WARRANTS

In 1998, the Corporation received cash proceeds of $40 million from the exercise
of  2,455,383  warrants  issued in  connection  with a  financial  restructuring
implemented in 1993.  Each warrant  entitled the holder to purchase one share of
common  stock at a purchase  price of $16.14 per  share,  subject to  adjustment
under certain events, at any time prior to the May 6, 1998, expiration date. The
proceeds from the exercises were added to the cash resources of the  Corporation
and used for general corporate purposes.
<TABLE>

4.  Debt

Total debt, including debt maturing within one year, as of December 31 consisted
of the following:

(millions)                                     1998       1997
- - ----------------------------------------------------------------
<CAPTION>
<S>                                          <C>        <C>

European line of credit due 1999             $   10     $    -
9.25% senior notes due 2001                     150        150
U.S. revolving credit facility due 2002          25         25
Canadian credit facility due 2002                69         72
Receivables facility due 2003 and 2004           80         80
8.5% senior notes due 2005                      150        150
8.75% sinking fund debentures due 2017           25         92
Industrial revenue bonds                         84         46
Other                                             3          5
- - --------------------------------------------------------------
Total                                           596        620
==============================================================
</TABLE>

U.S. REVOLVING CREDIT FACILITY

USG maintains a $500 million unsecured revolving credit facility, which includes
a $125 million letter of credit  subfacility,  with a syndicate of banks under a
credit agreement. The revolving credit facility expires in 2002 with no required
amortization prior to maturity.

As of December 31, 1998,  outstanding  revolving loans totaled $25 million,  and
letters of credit issued and  outstanding  amounted to $20 million,  leaving the
Corporation  with $455 million of available  credit under the  revolving  credit
facility.

The revolving loans bear interest at the London Interbank Offered Rate ("LIBOR")
as  determined  from  time  to time  plus  an  applicable  spread  based  on the
Corporation's  net debt to EBITDA ratio (as defined in the credit agreement) for
the preceding four quarters.  As of December 31, 1998, the applicable spread was
0.4%.  The average rate of interest on the revolving  loans was 6.0% during 1998
and 6.1% during 1997. See "Note 6. Financial  Instruments  and Risk  Management"
for  information on instruments  used by the Corporation to manage the impact of
interest rate changes on LIBOR-based bank debt.

The credit agreement contains restrictions on the operation of the Corporation's
business,   including   covenants   pertaining  to  liens,  sale  and  leaseback
transactions, and mergers with and acquisitions of businesses not related to the
building industry.

CANADIAN CREDIT FACILITY

On June 2, 1997, the Corporation  executed through CGC Inc. a $72 million (U.S.)
($110 million  Canadian),  parent-guaranteed  Canadian credit facility due 2002.
This  facility  was later  supplemented  by a 364-day  facility  for $13 million
(U.S.) ($20 million  Canadian) that was established in December 1997 and renewed
in December 1998.

As of year end 1998,  outstanding loans totaled $69 million (U.S.),  leaving $16
million (U.S.) of available credit under these facilities.

The method of calculating interest and the covenants related to these facilities
are  virtually  the same as those for the U.S.  facility  described  above.  The
average  rate of  interest on the  Canadian  loans was 6.0% during 1998 and 4.6%
during the period of June 2, 1997,  through  December 31, 1997. The average rate
of interest on a different  Canadian  credit  facility that was in effect during
the period of January 1, 1997,  through  its  termination  on June 4, 1997,  was
6.2%.

EUROPEAN LINE OF CREDIT

USG  also  maintains  a  parent-guaranteed,   multicurrency  ($20  million  U.S.
equivalent)  European  line of  credit.  As of  December  31,  1998,  short-term
borrowings outstanding under this line of credit amounted to $10 million (U.S.).
The weighted average interest rate on these borrowings during 1998 was 4.2%.

INDUSTRIAL REVENUE BONDS

Industrial revenue bonds reflected in the above table had interest rates ranging
from 5.6% to 8.8%, with maturities through 2032.

USG uses industrial revenue bonds to finance certain capital projects.  Proceeds
from these bonds are deposited into construction escrow accounts.  The bonds are
recorded  incrementally  on USG's  books  as funds  are  drawn  from the  escrow
accounts  throughout  the  construction  process.  In 1998 and 1997,  USG issued
industrial  revenue bonds  totaling $99 million,  of which $38 million was drawn
and recorded in 1998 and $7 million was drawn and recorded in 1997.

OTHER INFORMATION

The fair  market  value of total  debt  outstanding  was $619  million  and $646
million as of December  31,  1998 and 1997,  respectively,  based on  indicative
market prices as of those dates.

As of December 31, 1998,  aggregate scheduled  maturities of long-term debt were
zero in 2000, $150 million in 2001, $95 million in 2002 and $40 million in 2003.
The $25  million  of  8.75%  debentures  due 2017 was  classified  as a  current
liability on the consolidated  balance sheet in 1998, since USG will retire this
debt at par in 1999.

5.  Financing Arrangements

ACCOUNTS RECEIVABLE FACILITY

The  Corporation  has an  accounts  receivable  facility  in which  USG  Funding
Corporation,  a  special-purpose  subsidiary  of the  Corporation  formed  under
Delaware law,  entered into agreements with U.S. Gypsum and USG Interiors,  Inc.
These agreements provide that USG Funding purchases trade receivables (excluding
intercompany receivables owed by L&W Supply) of U.S. Gypsum and USG Interiors as
generated,  in a transaction  designed to be a "true sale" under applicable law.
USG Funding is a party to a Master Trust  arrangement (the "Master Trust") under
which the purchased  receivables are then transferred to Chase Manhattan Bank as
Trustee to be held for the  benefit of  certificate  holders  in such  trust.  A
residual  interest  in  the  Master  Trust  is  owned  by  USG  Funding  through
subordinated certificates.  Under a supplement to the Master Trust, certificates
representing  an  ownership  interest in the Master  Trust of up to $130 million
have been issued to Citicorp Securities,  Inc. Debt issued under the receivables
facility  has a final  maturity  in 2004 but may be  prepaid  at any  time.  The
interest  rate on such debt is fixed  through  2001 at 8.2%  through a long-term
interest  rate  swap.   Pursuant  to  the  applicable  reserve  and  eligibility
requirements, the maximum amount of debt issuable under the receivables facility
as of December 31, 1998 and 1997,  (including $80 million outstanding as of each
date) was $112 million and $107 million, respectively.

Under the  foregoing  agreements  and  related  documentation,  USG Funding is a
separate  corporate entity with its own separate creditors that will be entitled
to be satisfied out of USG Funding's  assets prior to  distribution of any value
to its shareholder.

As of December 31, 1998 and 1997, the outstanding balance of receivables sold to
USG Funding and held under the Master Trust was $189  million and $179  million,
respectively,  and debt  outstanding  under  the  receivables  facility  was $80
million as of each date. Receivables and debt outstanding in connection with the
receivables facility remain in receivables and long-term debt, respectively,  on
the consolidated balance sheet.

SHELF REGISTRATION

In 1996,  the  Securities  and Exchange  Commission  declared  effective a shelf
registration  statement  that allows the  Corporation to offer from time to time
(i) debt  securities (ii) shares of $1.00 par value preferred stock (iii) shares
of $0.10 par value  common  stock  and/or (iv)  warrants  to purchase  shares of
common stock, all having an aggregate  initial offering price not to exceed $300
million.  As of the filing date of the Corporation's  1998 Annual Report on Form
10-K, no securities had been issued pursuant to this registration.

6.  Financial Instruments and Risk Management

The amounts reported below as fair values represent the market value as obtained
from broker  quotations.  Any negative  fair values are estimates of the amounts
USG would need to pay to cancel the contracts or transfer them to other parties.

INTEREST RATE RISK MANAGEMENT

USG uses  interest  rate swap  agreements  to manage the impact of interest rate
changes on the underlying  floating-rate  debt. USG's swap portfolio consists of
pay  fixed/receive  floating  swaps,  which  effectively  convert  floating-rate
obligations into fixed-rate  instruments.  As of December 31, 1998 and 1997, USG
had  swap  agreements  in place  to  convert  $131  million  and  $105  million,
respectively,   of  notional   principal   from   floating-rate   to  fixed-rate
instruments.  As of December 31, 1998, all swap  agreements  mature within three
years.  The fair values of these swap  agreements  as of  December  31, 1998 and
1997, were $(8) million and $(10) million, respectively.

ENERGY RISK MANAGEMENT

USG uses swap agreements to hedge  anticipated  purchases of fuel to be utilized
in its manufacturing  processes.  As of December 31, 1998 and 1997, USG had swap
agreements to exchange  monthly payments on notional amounts of energy amounting
to $57 million and $30 million,  respectively.  These  agreements  mature within
three years. The fair value of these swap agreements as of December 31, 1998 and
1997, was $(6) million and zero, respectively.

FOREIGN EXCHANGE RISK MANAGEMENT

As of December 31, 1998 and 1997, USG had a number of foreign  currency  forward
contracts in place (primarily  Canadian dollars and Belgian francs) to hedge its
exposure to exchange rate fluctuations on foreign currency  transactions.  These
foreign  exchange  contracts  mature on the anticipated cash requirement date of
the hedged  transaction,  all within 12 months.  The notional amounts of foreign
currency  forward  contracts as of December 31, 1998 and 1997,  were $60 million
and $22 million, respectively. The fair values of these contracts as of December
31, 1998 and 1997, were $(1) million and zero, respectively.

COUNTERPARTY RISK

USG  is  exposed  to  credit  losses  in  the  event  of  nonperformance  by the
counterparties on its financial instruments.  All counterparties have investment
grade credit standing;  accordingly,  USG anticipates that these  counterparties
will be able to satisfy fully their  obligations  under the contracts.  USG does
not obtain collateral or other security to support financial instruments subject
to credit risk but monitors the credit standing of all counterparties.


7.  Purchase of Subsidiary Minority Interest

In the fourth quarter of 1996, the Corporation  purchased the minority  interest
in its Canadian  subsidiary,  CGC Inc. The common  shares of publicly held stock
totaled  approximately  6 million and were acquired at a price of $11 (Canadian)
per share. The total amount paid in U.S. dollars for the shares was $49 million.
This payment was financed  initially through an interim Canadian credit facility
due 1997 that was replaced in 1997 by a long-term  Canadian  credit facility due
2002.  As a result of the  transaction,  CGC  recorded  goodwill  of $41 million
(U.S.),  which is included in other assets on the consolidated balance sheet and
is being amortized over 40 years.

8.  Inventories

As of December 31, 1998 and 1997, the LIFO values of domestic  inventories  were
$168  million  and $153  million,  respectively,  and would have been $1 million
lower for 1998 and $4 million higher for 1997 if they were valued under the FIFO
and average production cost methods. The LIFO value of U.S. domestic inventories
exceeded that computed for U.S. federal income tax purposes by $30 million as of
December 31, 1998 and 1997. Inventory  classifications as of December 31 were as
follows:
<TABLE>

(millions)                                    1998         1997
- - ----------------------------------------------------------------
<CAPTION>
<S>                                         <C>       <C>

Finished goods and work in progress         $  151    $     132
Raw materials                                   69           65
Supplies                                        14           11
- - ----------------------------------------------------------------
Total                                          234          208
================================================================
</TABLE>

9.  Property, Plant and Equipment

Property, plant and equipment classifications as of December 31 were as follows:
<TABLE>

(millions)                                     1998       1997
- - ---------------------------------------------------------------
<CAPTION>
<S>                                         <C>        <C>

Land and mineral deposits                   $     63   $     61
Buildings and realty improvements                331        262
Machinery and equipment                        1,118        895
- - ---------------------------------------------------------------
                                               1,512      1,218

Reserves for depreciation and depletion         (298)      (236)
- - ---------------------------------------------------------------
Total                                          1,214        982
===============================================================
</TABLE>

10.  Leases

The  Corporation  leases  certain  of  its  offices,  buildings,  machinery  and
equipment,  and autos under  noncancelable  operating leases.  These leases have
various terms and renewal options.  Lease expense  amounted to $59 million,  $51
million and $46 million in the years ended  December  31,  1998,  1997 and 1996,
respectively. Future minimum lease payments required under operating leases with
initial or  remaining  noncancelable  terms in excess of one year as of December
31, 1998,  were $42 million in 1999,  $37 million in 2000,  $30 million in 2001,
$25 million in 2002 and $14 million in 2003. The aggregate obligation subsequent
to 2003 was $16 million.
<PAGE>

11.  Income Taxes

Earnings before income taxes consisted of the following:
<TABLE>

(millions)                1998       1997       1996
- - ----------------------------------------------------
<CAPTION>
<S>                   <C>        <C>        <C>

U.S.                  $    487   $    301   $    138
Foreign                     47         19         (6)
- - ----------------------------------------------------
Total                      534        320        132
====================================================

   Income taxes consisted of the following:

(millions)                1998       1997       1996
- - ----------------------------------------------------
Current:
Federal               $    165   $    147   $     90
Foreign                     12         10          5
State                       29         26         17
- - ----------------------------------------------------
                           206        183        112
====================================================
Deferred:
Federal                     (3)       (12)         3
Foreign                     (1)         2          1
State                        -         (1)         1
- - ----------------------------------------------------
                            (4)       (11)         5
- - ----------------------------------------------------
Total                      202        172        117
====================================================
</TABLE>
<TABLE>

Differences between actual provisions for income taxes and provisions for income
taxes at the U.S. federal statutory rate (35%) were as follows:

(millions)                       1998        1997       1996
- - ------------------------------------------------------------
<CAPTION>
<S>                          <C>         <C>         <C>

Taxes on income at
   federal statutory rate    $    187    $    112    $    46
Excess reorganization
   value amortization               -          44         59
Foreign sales corporation          (1)          -          -
Foreign earnings subject
   to different tax rates          (1)          2          2
State income tax, net of
   federal benefit                 19          16         12
Percentage depletion               (3)         (3)        (3)
Other, net                          1           1          1
- - ------------------------------------------------------------
Provision for income taxes        202         172        117
============================================================

Effective income tax rate       37.8%       53.9%      88.9%
============================================================
</TABLE>
<TABLE>

Significant  components of deferred tax (assets)  liabilities  as of December 31
were as follows:

(millions)                                 1998         1997
- - ------------------------------------------------------------
<CAPTION>
<S>                                     <C>        <C>

Property, plant and equipment           $   173    $    155
Other                                         1           -
- - ------------------------------------------------------------
Deferred tax liabilities                    174         155
- - ------------------------------------------------------------
Pension and postretirement benefits         (87)        (78)
Reserves not deductible until paid         (137)       (126)
Other                                         -           2
- - ------------------------------------------------------------
Deferred tax assets                        (224)       (202)
- - ------------------------------------------------------------
Net deferred tax assets                     (50)        (47)
============================================================
</TABLE>

A valuation  allowance of $90 million,  which had been provided for deferred tax
assets   relating  to  pension  and   postretirement   benefits   prior  to  the
Corporation's  financial  restructuring  in 1993,  was  eliminated  in the third
quarter  of 1997.  The  elimination  of this  allowance  reflected  a change  in
management's  judgment  regarding  the  realizability  of these assets in future
years as a result of the  Corporation's  pretax  earnings  levels  and  improved
capital  structure over the prior three years.  In accordance with SOP 90-7, the
benefit  realized from the  elimination of this allowance was used to reduce the
balance of excess reorganization value to zero in the third quarter of 1997.

The Corporation used a net operating loss carryforward of $100 million to offset
U.S. taxable income in 1994 through 1996.  Because of the uncertainty  regarding
the application of the Internal Revenue Code to this carryforward as a result of
the Corporation's  financial  restructuring in 1993, the carrryforward  could be
reduced or eliminated.

The  Corporation  does not  provide  for U.S.  income  taxes on the  portion  of
undistributed   earnings  of  foreign  subsidiaries  that  are  intended  to  be
permanently  reinvested.  The cumulative amount of such  undistributed  earnings
totaled approximately $173 million as of December 31, 1998. These earnings would
become  taxable  in the  United  States  upon the sale or  liquidation  of these
foreign subsidiaries or upon the remittance of dividends.  It is not practicable
to estimate the amount of the deferred tax liability on such earnings.

12.  Employee Retirement Plans

The Corporation and most of its subsidiaries  have defined benefit pension plans
for all eligible  employees.  Benefits of the plans are generally based on years
of service and employees' compensation during the final years of employment. The
Corporation  also  maintains  plans that  provide  retiree  health care and life
insurance  benefits  for all  eligible  employees.  Employees  generally  become
eligible for the retiree benefit plans when they meet minimum retirement age and
service requirements. The cost of providing most retiree health care benefits is
shared with retirees.

In 1998, the Financial  Accounting  Standards Board issued SFAS 132, "Employers'
Disclosures  about  Pensions  and  Other  Postretirement  Benefits,"  which  the
Corporation adopted as of December 31, 1998.

The components of net pension and postretirement benefit costs are summarized in
the following tables:
<TABLE>

                                                Pension Benefits
                                       ------------------------------
(millions)                                1998        1997       1996
- - ---------------------------------------------------------------------
<CAPTION>
<S>                                    <C>         <C>        <C>

Service cost of benefits
   earned                              $    14     $    12    $    12
Interest cost on projected
   benefit obligation                       39          36         35
Expected return on plan assets             (44)        (39)       (35)
Net amortization                             1           -          -
- - ---------------------------------------------------------------------
Net pension cost                            10           9         12
=====================================================================


                                           Postretirement Benefits
                                       ------------------------------
(millions)                                1998       1997        1996
- - ---------------------------------------------------------------------
Service cost of benefits
   earned                                    6          6           6
Interest cost on projected
   benefit obligation                       14         15          16
Net amortization                            (1)         -           -
- - ---------------------------------------------------------------------
Net postretirement cost                     19         21          22
=====================================================================
</TABLE>
<TABLE>

The following tables summarize pension and postretirement  benefit  obligations,
plan assets and funded status as of December 31:

                                              Pension              Postretirement
                                         ----------------        ----------------
 (millions)                               1998       1997         1998       1997
- - ---------------------------------------------------------------------------------
<CAPTION>
<S>                                      <C>        <C>          <C>        <C>

Change in Benefit Obligation:
Benefit obligation as of January 1       $ 528      $ 492        $ 219      $ 222
Service cost                                14         12            6          6
Interest cost                               39         36           14         15
Employee contributions                       9          8            2          2
Benefits paid                              (47)       (37)         (13)       (10)
Plan amendment                               3          -            -          -
Actuarial (gain) loss                       90         17          (14)       (16)
Foreign currency rate change                (3)         -            -          -
- - ---------------------------------------------------------------------------------
Benefit obligation
   as of December 31                       633        528          214        219
=================================================================================

Change in Plan Assets:
Fair value as of January 1                 554        464            -          -
Actual return on plan assets                79         96            -          -                     -
Employer contributions                       7         27            -          -
Employee contributions                       9          8            -          -
Benefits paid                              (47)       (37)           -          -
Foreign currency rate change                (5)         -            -          -
Other                                        -         (4)           -          -
- - ---------------------------------------------------------------------------------
Fair value as of December 31               597        554            -          -
=================================================================================

Funded Status:
As of December 31                          (36)        26         (214)     (219)
Unrecognized prior service                   4          -            1         1
Unrecognized net (gain) loss                14        (39)         (23)      (10)
- - ---------------------------------------------------------------------------------
Net balance sheet liability                (18)       (13)        (236)     (228)
=================================================================================

Assumptions as of December 31:
Discount rate                             6.75%      7.25%        6.75%     7.25%
Pension plans expected return                9%         9%            -         -
Compensation increase rate                   5%         5%           5%        5%
- - ---------------------------------------------------------------------------------
</TABLE>
<TABLE>

The  assumed  health-care-cost  trend  rate used in  measuring  the  accumulated
postretirement  benefit  obligation was 7% as of December 31, 1998, and 8% as of
December 31, 1997,  with a rate gradually  declining to 5% by 2000 and remaining
at  that  level  thereafter.  A  one-percentage-point   change  in  the  assumed
health-care-cost trend rate would have the following effects:



                                    One Percentage             One Percentage
(millions)                          Point Increase             Point Decrease
- - ---------------------------------------------------------------------------------
<CAPTION>
<S>                                   <C>                       <C>

Effect on total service and
   interest cost components           $        3                $        (3)
Effect on postretirement
   benefit obligation                         32                        (26)
- - ---------------------------------------------------------------------------------
</TABLE>


13.  Stock-Based Compensation

The Corporation has issued stock options from three  successive  plans under its
long-term  equity program.  Under each of the plans,  options were granted at an
exercise  price  equal to the  market  value on the date of grant.  All  options
granted under the plans have 10-year terms and vesting schedules of two or three
years. The options expire on the 10th  anniversary of the date of grant,  except
in the case of retirement, death or disability, in which case they expire on the
earlier of the fifth anniversary of such event or the expiration of the original
option term.

The  Corporation  accounts  for  stock-based  compensation  in  accordance  with
Accounting Principles Board Opinion No. 25 and discloses such compensation under
the provisions of SFAS 123, "Accounting for Stock-Based Compensation."

The fair value of each option grant was  estimated as of the date of grant using
the  Black-Scholes  option  pricing  model with the following  weighted  average
assumptions for options granted in 1998, 1997 and 1996.

<TABLE>

                                  1998        1997       1996
- - -------------------------------------------------------------
<CAPTION>
<S>                              <C>         <C>        <C>

Expected life (years)             7.4         7.4        7.4
Risk-free interest rate           5.7%        6.8%       5.9%
Expected volatility              30.7%       29.6%      33.0%
Dividend yield                       -           -          -
- - -------------------------------------------------------------
</TABLE>

     The  weighted  average  fair  values of  options  granted  on January 2 and
January 19, 1998,  were $22.32 and $24.53,  respectively.  The weighted  average
fair  values of options  granted  during the years ended  December  31, 1997 and
1996, were $15.61 and $14.17, respectively.

     If  the  Corporation  had  elected  to  recognize   compensation  cost  for
stock-based  compensation  grants  consistent with the method prescribed by SFAS
No. 123, net earnings and net earnings per common share for 1998,  1997 and 1996
would have changed to the following pro forma amounts: <TABLE>


(millions, except per share data)           1998        1997        1996
- - ------------------------------------------------------------------------
<CAPTION>
<S>                                      <C>           <C>        <C>

Net Earnings: As reported                $   332       $ 148      $   15
              Pro forma                      328         144          13
Basic EPS:    As reported                   6.81        3.19        0.32
              Pro forma                     6.73        3.12        0.29
Diluted EPS:  As reported                   6.61        3.03        0.31
              Pro forma                     6.54        2.96        0.28
- - ------------------------------------------------------------------------

     Stock option activity was as follows:

(options in thousands)                      1998        1997        1996
- - ------------------------------------------------------------------------
Options:
Outstanding, January 1                     2,049       2,565       2,560
Granted                                      413         378         359
Exercised                                   (388)       (882)       (343)
Canceled                                     (40)        (12)        (11)
- - ------------------------------------------------------------------------
Outstanding, December 31                   2,034       2,049       2,565
Exercisable, December 31                   1,292       1,339       1,889
Available for grant, December 31           1,122       1,671         467

Weighted Average Exercise Price:
Outstanding, January 1                  $  25.54    $  21.71    $  19.19
Granted                                    48.44       34.60       29.40
Exercised                                  22.72       18.20       10.75
Canceled                                   40.53       32.00       28.29
Outstanding, December 31                   30.43       25.54       21.71
Exercisable, December 31                   23.80       22.06       18.82
- - ------------------------------------------------------------------------
</TABLE>
<TABLE>

The following table summarizes information about stock options outstanding as of
December 31, 1998:

       Options Outstanding                        Options Exercisable
- - ----------------------------------      -------------------------------------
                                        Weighted
                          Weighted      Average                      Weighted
Range of                  Average       Remaining                    Average
Exercise      Options     Exercise      Contractual     Options      Exercise
 Prices        (000)      Price         Life (yrs.)      (000)       Price
<CAPTION>
<S>           <C>           <C>             <C>           <C>         <C>

$  5 - 15       391         $ 10            4.4           391         $  10
  15 - 25       161           22            5.6           161            22
  25 - 35     1,086           32            6.6           740            31
  35 - 55       396           48            9.0             -             -
- - -----------------------------------------------------------------------------
Total         2,034                                     1,292
=============================================================================
</TABLE>

14.  Segments

USG adopted SFAS 131,  "Disclosures  about Segments of an Enterprise and Related
Information," as of December 31, 1998. This statement established new disclosure
requirements  related to operating and  geographic  segments as presented in the
following tables:
<TABLE>

OPERATING SEGMENTS

(millions)                    1998            1997          1996
- - ----------------------------------------------------------------
<CAPTION>
<S>                        <C>          <C>           <C>

Net Sales:
North American Gypsum      $ 2,576      $    2,338    $    2,067
Worldwide Ceilings             657             634           612
Eliminations                  (103)            (98)          (89)
- - ----------------------------------------------------------------
Total                        3,130           2,874         2,590
================================================================

Amortization of Excess
   Reorganization Value:
North American Gypsum            -              62            82
Worldwide Ceilings               -              65            87
- - ----------------------------------------------------------------
Total                            -             127           169
================================================================

Operating Profit (Loss):
North American Gypsum          574             429           291
Worldwide Ceilings              65              (1)          (44)
Corporate                      (54)            (49)          (39)
- - ----------------------------------------------------------------
Total                          585             379           208
================================================================

Depreciation, Depletion
   and Amortization:
North American Gypsum           55              48            44
Worldwide Ceilings              18              17            15
Corporate                        8               5             6
- - ----------------------------------------------------------------
Total                           81              70            65
================================================================

Capital Expenditures:
North American Gypsum          269             126            63
Worldwide Ceilings              39              45            56
Corporate                        1               1             1
- - ----------------------------------------------------------------
Total                          309             172           120
================================================================

Assets:
North American Gypsum        1,548           1,247         1,161
Worldwide Ceilings             434             398           478
Corporate                      383             289           230
Eliminations                    (8)             (8)           (5)
- - ----------------------------------------------------------------
Total                        2,357           1,926         1,864
================================================================
</TABLE>
<TABLE>

GEOGRAPHIC SEGMENTS

(millions)                    1998           1997           1996
- - ----------------------------------------------------------------
<CAPTION>
<S>                       <C>          <C>            <C>

Net Sales:
United States             $  2,829     $    2,570     $    2,319
Canada                         206            184            169
Other Foreign                  256            251            242
Geographic transfers          (161)          (131)          (140)
- - ----------------------------------------------------------------
Total                        3,130          2,874          2,590
================================================================

Long-Lived Assets:
United States                1,094            869            947
Canada                         155            156            159
Other Foreign                   83             71             99
- - ----------------------------------------------------------------
Total                        1,332          1,096          1,205
================================================================
</TABLE>

Transactions  between  operating  and  geographic  segments are accounted for at
transfer  prices  that are  approximately  equal to market  value.  Intercompany
transfers   between   operating  and  geographic   segments  are  not  material.
Eliminations  represent intercompany sales between operating segments. No single
customer  accounted  for 10% or more of  consolidated  net sales.  Revenues  are
attributed to geographic areas based on the location of the assets producing the
revenues. Export sales to foreign unaffiliated customers represent less than 10%
of consolidated  net sales.  Segment  operating profit (loss) includes all costs
and  expenses  directly  related to the segment  involved and an  allocation  of
expenses that benefit more than one segment. Segment operating profit (loss) for
1997 and 1996 also includes the noncash  amortization  of excess  reorganization
value,  which had the impact of  reducing  operating  profit for North  American
Gypsum and Worldwide Ceilings.

Corporate  assets  include  the  assets  of USG  Funding,  which  represent  the
outstanding  balances  of  receivables   purchased  from  U.S.  Gypsum  and  USG
Interiors,  net of  reserves.  As of  December  31,  1998,  1997 and 1996,  such
receivables,  net of reserves,  amounted to $141 million,  $128 million and $121
million,  respectively,  including  $106  million,  $95  million and $89 million
purchased  from  U.S.  Gypsum  and $35  million,  $33  million  and $32  million
purchased from USG Interiors as of the respective dates.

15.  Litigation

ASBESTOS AND RELATED INSURANCE LITIGATION

One of the Corporation's subsidiaries,  U.S. Gypsum (or "the Company"), is among
many  defendants  in  lawsuits  arising  out  of the  manufacture  and  sale  of
asbestos-containing  materials.  U.S.  Gypsum sold  certain  asbestos-containing
products  beginning in the 1930s; in most cases, the products were  discontinued
or asbestos  was removed  from the formula by 1972,  and no  asbestos-containing
products  were  produced  after  1977.  Some of these  lawsuits  seek to recover
compensatory  and in many cases punitive  damages for costs  associated with the
maintenance  or removal  and  replacement  of  asbestos-containing  products  in
buildings (the "Property  Damage Cases").  Others seek  compensatory and in many
cases punitive damages for personal injury allegedly  resulting from exposure to
asbestos-containing products (the "Personal Injury Cases").

Property  Damage Cases:  U.S. Gypsum is a defendant in 12 Property Damage Cases,
most of which involve  multiple  buildings.  One of the cases is a conditionally
certified class action  comprised of all colleges and universities in the United
States,  which  certification is presently  limited to the resolution of certain
allegedly  "common"  liability issues (Central  Wesleyan College v. W.R. Grace &
Co., et al., U.S.D.C.  S.C.).  Fourteen  additional  property damage claims have
been threatened against U.S. Gypsum. The Company anticipates that few additional
Property  Damage Cases will be filed as a result of the operation of statutes of
limitations  and the  impact of certain  other  factors,  although  if the class
action  referred to above is  decertified,  it is likely that some  colleges and
universities will file individual  Property Damage Cases against U.S. Gypsum. It
is possible that any cases that are filed will seek substantial damages.

In total,  U.S.  Gypsum has settled  approximately  114  Property  Damage  Cases
involving 244 plaintiffs, in addition to four class action settlements.  Twenty-
four cases have been tried to verdict,  16 of which were won by U.S.  Gypsum and
five lost;  three other  cases,  one won at the trial  level and two lost,  were
settled during appeals.  In the cases lost,  compensatory  damage awards against
U.S. Gypsum totaled $11.5 million.  Punitive  damages totaling $5.5 million were
entered against U.S.  Gypsum in four trials.  Two of the punitive damage awards,
totaling  $1.45  million,  were paid,  and two were settled during the appellate
process.

In 1998,  two Property  Damage Cases were filed against U.S.  Gypsum,  two cases
were dismissed before trial, four were settled, and 12 were pending at year end.
U.S.  Gypsum  expended  $29.5 million for the defense and resolution of Property
Damage Cases (most of which consisted of payments for  settlements  agreed to in
the prior year) and received  insurance  payments of $22.0  million in 1998.  In
1997, one Property Damage Case was filed against U.S.  Gypsum,  three cases were
dismissed before trial, six were settled,  one closed case was reopened,  and 16
were pending at year end. U.S.  Gypsum expended $7.8 million for the defense and
resolution  of Property  Damage Cases and received  insurance  payments of $15.5
million in 1997.  During 1996, two Property Damage Cases were filed against U.S.
Gypsum, three cases were dismissed before trial, eight were settled, and 23 were
pending at year end;  U.S.  Gypsum  expended  $33.4  million for the defense and
resolution of Property Damage Cases in 1996 and received  insurance  payments of
$84 million. A substantial portion of the insurance payments received during the
years 1996-1997  constituted  reimbursement  for amounts  expended in connection
with Property Damage Cases in prior years.

U.S.  Gypsum's  estimated  cost of resolving  pending  Property  Damage Cases is
discussed below (see "Estimated Cost").

Personal Injury Cases:  U.S. Gypsum is also a defendant in approximately  98,000
Personal  Injury Cases  pending at December 31, 1998,  as well as an  additional
approximately  43,000 cases that have been settled but will be closed over time.
Filings  of new  Personal  Injury  Cases  increased  to  80,000  claims in 1998,
compared to 23,500 claims in 1997 and 28,000 claims in 1996.  The higher rate of
personal  injury case filings in 1998 is believed to have resulted,  at least in
part,  from the Supreme  Court  ruling  striking  down the  Georgine  settlement
described  below. It is anticipated  that Personal Injury Cases will continue to
be filed  in  substantial  numbers  for the  foreseeable  future,  although  the
percentage  of  such  cases  filed  by  claimants  with  little  or no  physical
impairment is expected to remain high.

U.S.  Gypsum's  average  settlement cost for Personal Injury Cases over the past
several  years has been  approximately  $1,600 per claim,  exclusive  of defense
costs. In 1998, U.S. Gypsum (through the Center for Claims Resolution, discussed
below) agreed to  settlements of  approximately  60,000  Personal  Injury Cases,
including 39,000 cases that will be closed in future years at an average cost of
approximately  $1,600 per case,  and 21,000  claims  closed  during  1998 for an
average  settlement  of  approximately  $2,600  per  case.  The  higher  cost of
settlements  of those cases  actually  closed in 1998 was due  primarily to more
costly settlements in particular jurisdictions, and an increase in the number of
such claims that came from individuals  alleging serious illness, due in part to
the courts' accelerated  treatment of such claims.  Management  anticipates that
the  average  settlement  cost for  most  pending  claims  will  continue  to be
moderated by opportunities  for block settlements of large numbers of claims and
the  apparently  high  percentage  of claims that appear to have been brought by
individuals  with  little or no physical  impairment.  However,  other  factors,
including the litigation strategies of certain co-defendants and an increasingly
adverse litigation environment in particular jurisdictions, are expected to have
an adverse  impact on  settlement  costs for some  pending and future cases and,
therefore, on U.S. Gypsum's overall settlement costs.

U.S.  Gypsum  is  a  member,   together  with  18  other  former   producers  of
asbestos-containing   products,   of  the  Center  for  Claims  Resolution  (the
"Center"),  which has assumed the handling of all Personal  Injury Cases pending
against U.S.  Gypsum and the other  members of the Center.  Costs of defense and
settlement are shared among the members of the Center pursuant to  predetermined
sharing  formulae.  Most of U.S.  Gypsum's personal injury liability and defense
costs have been paid by those of its  insurance  carriers that in 1985 signed an
Agreement  Concerning  Asbestos-Related  Claims  (the  "Wellington  Agreement"),
obligating them to provide coverage for the defense and indemnity costs incurred
by U.S.  Gypsum in  Personal  Injury  Cases.  Punitive  damages  have never been
awarded  against U.S.  Gypsum in a Personal  Injury Case;  whether such an award
would be covered by insurance  under the  Wellington  Agreement  would depend on
state law and the terms of the individual policies.

U.S.  Gypsum and the Center were parties to a class action  settlement  known as
Georgine  that would have  required  most  future  Personal  Injury  Cases to be
resolved  through an  administrative  system and provided  prescribed  levels of
benefits based on the nature of the claimants' physical impairment.  However, on
June 25,  1997,  the  Supreme  Court  affirmed  a May 1996  ruling  by a federal
appellate  court  finding  that class  certification  in Georgine  was  improper
(Amchem Products,  Inc. v. Windsor, Case No. 96-270).  Since the invalidation of
the Georgine  settlement,  U.S.  Gypsum and the other  Center  members have been
named in a substantial  number of additional  Personal Injury Cases. A number of
defendants in asbestos  personal  injury  claims,  including U.S.  Gypsum,  have
stated their intention to continue pursuit of an alternative to the current tort
system,  including  possible  federal  legislation  that would impose  objective
disease criteria on asbestos cases, although there can be no assurance that such
an alternative can be implemented.  In addition,  some settlements negotiated by
the Center during 1998 included  agreements by plaintiffs' firms to recommend to
their future  clients that they defer filing  personal  injury claims unless and
until they meet  established  disease  criteria.  The Center  will  continue  to
attempt  to  negotiate  similar  agreements  in the  future.  The impact of such
agreements cannot be determined at this time.

During 1998,  approximately 80,000 Personal Injury Cases were filed against U.S.
Gypsum,  and 21,000 were settled or dismissed.  U.S. Gypsum incurred expenses of
$61.1  million in 1998 with  respect to the  resolution  and defense of Personal
Injury  Cases,  of which  $45.5  million  was paid by  insurance.  During  1997,
approximately  23,500  Personal  Injury Cases were filed  against  U.S.  Gypsum,
approximately  5,000  claims  were  refiled or  amended to add U.S.  Gypsum as a
defendant,  and  approximately  14,000 were settled or  dismissed.  U.S.  Gypsum
incurred  expenses  of $31.6  million in 1997 with  respect to  Personal  Injury
Cases, of which $27.2 million was paid by insurance.  During 1996, approximately
28,000 Personal Injury Cases were filed against U.S. Gypsum,  and  approximately
20,000 were settled or dismissed. U.S. Gypsum incurred expenses of $28.6 million
in 1996 with respect to Personal  Injury Cases,  of which $21.6 million was paid
by insurance.

U.S.  Gypsum's  estimated cost of resolving the pending Personal Injury Cases is
discussed below (see "Estimated Cost").

Insurance  Coverage Action:  U.S. Gypsum sued its insurance  carriers in 1983 to
obtain  coverage for asbestos cases (the "Coverage  Action") and has settled all
disputes  with most of its solvent  carriers.  As of December  31,  1998,  after
deducting insolvent coverage and insurance paid out to date,  approximately $262
million of potential insurance remained, including approximately $217 million of
insurance from six carriers that have agreed, subject to certain limitations and
conditions,  to cover asbestos-related costs, and approximately $45 million from
three  carriers  that have not yet agreed to make their  coverage  available  on
acceptable  terms. A minimum of $10 million of the disputed coverage is expected
to be available regardless of the outcome of further proceedings. U.S. Gypsum is
attempting to resolve its disputes with the nonsettling  carriers through either
a negotiated resolution or further litigation in the Coverage Action.

U.S. Gypsum's total  expenditures for all  asbestos-related  matters,  including
property damage,  personal  injury,  insurance  coverage  litigation and related
expenses,  exceeded  aggregate  insurance  payments by $24 million in 1998,  but
insurance  payments exceeded  asbestos-related  expenses by $0.7 million in 1997
and $41 million in 1996, due primarily to nonrecurring reimbursement for amounts
expended in prior years.

Insolvent Carriers:  Four of U.S. Gypsum's domestic insurance carriers,  as well
as  underwriters  of  portions  of various  policies  issued by Lloyds and other
London  market  companies,  providing a total of  approximately  $106 million of
coverage, are insolvent. Because these policies would already have been consumed
by U.S. Gypsum's asbestos expenses to date if the carriers had been solvent, the
insolvencies  will not  adversely  affect  U.S.  Gypsum's  coverage  for  future
asbestos-related   costs.   However,   U.S.   Gypsum  is  pursuing   claims  for
reimbursement  from the  insolvent  estates  and other  sources  and  expects to
recover a  presently  indeterminable  portion of the policy  amounts  from these
sources.

Estimated Cost: The asbestos  litigation  involves numerous  uncertainties  that
affect U.S. Gypsum's ability to estimate reliably its probable  liability in the
Personal Injury and Property  Damage Cases.  In the Property Damage Cases,  such
uncertainties  include  the  identification  and  volume of  asbestos-containing
products in the buildings at issue in each case,  which is often  disputed;  the
claimed damages associated  therewith;  the viability of statute of limitations,
product identification and other defenses, which varies depending upon the facts
and  jurisdiction of each case; the amount for which such cases can be resolved,
which normally (but not uniformly) has been substantially lower than the claimed
damages;  and the  viability  of claims for punitive and other forms of multiple
damages.  Uncertainties  in  the  Personal  Injury  Cases  include  the  number,
characteristics  and venue of Personal  Injury Cases that are filed against U.S.
Gypsum;  the Center's ability to continue to negotiate  pretrial  settlements at
historical or acceptable levels; the level of physical  impairment of claimants;
the viability of claims for punitive  damages;  any changes in membership in the
Center and the  ability to develop an  alternate  claims-handling  vehicle  that
retains the key benefits of Georgine. As a result, any estimate of U.S. Gypsum's
liability, while based upon the best information currently available, may not be
an accurate  prediction of actual costs and is subject to revision as additional
information becomes available and developments occur.

Subject to the above uncertainties, and based in part on information provided by
the Center,  U.S. Gypsum  estimates that it is probable that Property Damage and
Personal  Injury  Cases  pending at December  31,  1998,  can be resolved for an
amount totaling between $330 million and $410 million,  including defense costs.
Most of these  amounts are  expected to be expended  over the next three to five
years,  although  settlements of some Personal  Injury Cases will be consummated
over periods as long as seven years.  Significant insurance funding is available
for these costs, as detailed below,  although resolution of the pending cases is
expected to consume U.S. Gypsum's remaining insurance. At this time, U.S. Gypsum
does not believe  that the number and  severity of  asbestos-related  cases that
ultimately will be filed in the future can be predicted with sufficient accuracy
to provide the basis for a  reasonable  estimate of the  liability  that will be
associated with such cases.

Accounting  for Asbestos  Liability:  As of December 31, 1998,  U.S.  Gypsum had
reserved $330 million for liability  from pending  Property  Damage and Personal
Injury Cases  (equaling the lower end of the estimated  range of costs  provided
above).  U.S. Gypsum had a corresponding  receivable from insurance  carriers of
approximately $227 million, the estimated portion of the reserved amount that is
expected to be paid or  reimbursed  by  insurance  that is either  committed  or
probable  of  recovery.  Additional  amounts  may  be  reimbursed  by  insurance
depending  upon the outcome of litigation and  negotiations  relating to the $35
million of insurance that is presently disputed.

U.S.  Gypsum compares its estimates of liability to  then-existing  reserves and
available  insurance  assets and adjusts  its  reserves  as  appropriate.  As of
December  31,  1998,  U.S.  Gypsum had an  additional  $43 million  reserved for
asbestos liabilities and asbestos-related expenses. The Company historically has
accrued $18 million  annually for asbestos  costs.  In view of the high level of
personal injury filings that followed the  termination of Georgine,  U.S. Gypsum
accrued an  additional  $8 million in the fourth  quarter of 1998.  The  Company
expects that an increased level of accrual will continue to be necessary  during
1999 and possibly  longer.  The amount of future  periodic  accruals will depend
upon  factors  that  include,  but may not be limited  to, the rate at which new
asbestos-related  claims are filed,  the imposition of medical  criteria through
legislation or negotiated agreements, U.S. Gypsum's average settlement cost, and
the  necessity  of  higher-cost  settlements  in  particular  jurisdictions.  In
addition,  the Company will continue to evaluate  whether its ultimate  probable
liability for future Personal Injury Cases can be reasonably estimated.  If such
an estimate can be made,  it is probable that  additional  charges to results of
operations  would be  necessary,  although  whether such an estimate can be made
and,  if so,  the  timing  and  amount of the  resulting  charge to  results  of
operations cannot presently be determined.  However,  the amount of the periodic
and other charges  described above could be material to results of operations in
the period in which they are taken.

Conclusion:  The above estimates and reserves are  re-evaluated  periodically as
additional information becomes available. Additional periodic charges to results
of operations are expected to be necessary in light of future  events,  and such
charges  could be material to results of  operations in the period in which they
are taken. However, it is management's  opinion,  taking into account all of the
above information and uncertainties,  including currently available  information
concerning U.S. Gypsum's liabilities,  reserves and probable insurance coverage,
that the  asbestos  litigation  will not have a material  adverse  effect on the
liquidity or financial position of the Corporation.

ENVIRONMENTAL LITIGATION

The Corporation and certain of its subsidiaries  have been notified by state and
federal  environmental  protection  agencies of possible  involvement  as one of
numerous "potentially  responsible parties" in a number of so-called "Superfund"
sites in the United  States.  In most of these  sites,  the  involvement  of the
Corporation  or its  subsidiaries  is expected to be  minimal.  The  Corporation
believes  that  appropriate  reserves  have been  established  for its potential
liability in connection with all Superfund sites but is continuing to review its
accruals as additional  information  becomes available.  Such reserves take into
account all known or estimated costs associated with these sites, including site
investigations and feasibility costs, site cleanup and remediation, legal costs,
and fines and penalties, if any. In addition, environmental costs connected with
site cleanups on USG-owned property also are covered by reserves  established in
accordance  with the  foregoing.  The  Corporation  believes  that neither these
matters  nor any other known  governmental  proceeding  regarding  environmental
matters will have a material  adverse  effect upon its results of  operations or
financial position.


                              REPORT OF MANAGEMENT

Management of USG Corporation is responsible for the preparation,  integrity and
fair  presentation  of the financial  information  included in this report.  The
financial  statements have been prepared in accordance  with generally  accepted
accounting  principles and necessarily include certain amounts that are based on
management's estimates and judgment.

Management  is  responsible  for  maintaining  a system of  internal  accounting
controls to provide reasonable  assurance as to the integrity and reliability of
the financial  statements,  the proper  safeguarding and use of assets,  and the
accurate  execution  and recording of  transactions.  Such controls are based on
established  policies and procedures and are  implemented by trained  personnel.
The system of internal  accounting  controls is monitored  by the  Corporation's
internal   auditors  to  confirm  that  the  system  is  proper  and   operating
effectively.  The  Corporation's  policies  and  procedures  prescribe  that the
Corporation and its subsidiaries are to maintain ethical  standards and that its
business practices are to be consistent with those standards.

The Corporation's financial statements have been audited by Arthur Andersen LLP,
independent  public  accountants.  Their audit was conducted in accordance  with
generally  accepted  auditing  standards  and  included   consideration  of  the
Corporation's  internal control system.  Management has made available to Arthur
Andersen LLP all the  Corporation's  financial records and related data, as well
as minutes of the meetings of the Board of Directors.  Management  believes that
all representations made to Arthur Andersen LLP were valid and appropriate.

The Board of Directors,  operating through its Audit Committee composed entirely
of nonemployee directors, provides oversight to the financial reporting process.
The Audit Committee meets  periodically  with management,  the internal auditors
and Arthur Andersen LLP, jointly and separately,  to review financial  reporting
matters,  internal  accounting  controls  and audit  results to assure  that all
parties are properly fulfilling their responsibilities. Both Arthur Andersen LLP
and the internal auditors have unrestricted access to the Audit Committee.


/s/ William C. Foote
- - ----------------------
Chairman and Chief Executive Officer

/s/ Richard H. Fleming
- - ----------------------
Executive Vice President and Chief Financial Officer

/s/ Raymond T. Belz
- - ----------------------
Senior Vice President and Controller


                          REPORT OF INDEPENDENT PUBLIC
                                   ACCOUNTANTS

To the Stockholders and Board of Directors of USG Corporation:

We have audited the accompanying  consolidated balance sheets of USG Corporation
and subsidiaries as of December 31, 1998 and 1997, and the related  consolidated
statements  of  earnings,  cash flows,  stockholders'  equity and  comprehensive
income for the years ended  December 31, 1998,  1997 and 1996.  These  financial
statements  are  the  responsibility  of  the  Corporation's   management.   Our
responsibility  is to express an opinion on these financial  statements based on
our audits.

We  conducted  our  audits  in  accordance  with  generally   accepted  auditing
standards.  Those standards require that we plan and perform the audit to obtain
reasonable assurance about whether the financial statements are free of material
misstatement.  An audit includes examining, on a test basis, evidence supporting
the amounts and disclosures in the financial statements.  An audit also includes
assessing the  accounting  principles  used and  significant  estimates  made by
management,  as well as evaluating the overall financial statement presentation.
We believe that our audits provide a reasonable basis for our opinion.

In our opinion,  the financial  statements  referred to above present fairly, in
all  material   respects,   the  financial   position  of  USG  Corporation  and
subsidiaries  as of  December  31,  1998  and  1997,  and the  results  of their
operations and their cash flows for the years ended December 31, 1998,  1997 and
1996, in conformity with generally accepted accounting principles.


/s/ Arthur Andersen LLP
- - -----------------------
ARTHUR ANDERSEN LLP
Chicago, Illinois

January 22, 1999
<PAGE>
<TABLE>


                                                  USG CORPORATION
                                   SELECTED QUARTERLY FINANCIAL DATA (unaudited)
                                         (millions, except per share data)


                                     First              Second          Third            Fourth            Total
                                    Quarter            Quarter         Quarter           Quarter           Year
                                    -------            -------         -------           -------          -------
<CAPTION>
     <S>                         <C>               <C>              <C>               <C>             <C>

     1998
     Net sales.................  $      735        $       775      $      814        $      806      $     3,130
     Gross profit..............         196                221             233               234              884
     Operating profit .........         124                147             158               156              585
     Net earnings .............          67                 82              91                92              332
     Per Common Share:
       Net earnings (a)   - basic      1.42               1.68            1.83              1.85             6.81
                          - diluted    1.35               1.63            1.80              1.83             6.61
       Price range  (b)   - high     56.750             58.000          58.750            51.625           58.750
                          - low      47.000             49.500          41.375            35.500           35.500
       Cash dividends paid ....           -                  -               -              0.10             0.10
     EBITDA....................         142                165             177               175              659


     1997
     Net sales.................         673                723             757               721            2,874
     Gross profit..............         177                202             210               198              787
     Operating profit (c)......          69                 88              97               125              379
     Net earnings (c)..........          15                 27              34                72              148
     Per Common Share:
       Net earnings (a)   - basic      0.33               0.57            0.74              1.53             3.19
                          - diluted    0.32               0.55            0.70              1.45             3.03
       Price range  (b)   - high     38.750             38.625          48.000            51.500           51.500
                          - low      30.000             29.875          35.750            41.375           29.875
     EBITDA....................         127                147             156               142              572

(a)  Basic  earnings per share is calculated  using average  shares  outstanding
     during the period.  Diluted  earnings per share is calculated using average
     shares  and  common  stock  equivalents   outstanding  during  the  period.
     Consequently,  the sum of the four quarters is not  necessarily the same as
     the total for the year.

(b)  Stock  price  ranges are for  transactions  on the New York Stock  Exchange
     (trading symbol USG), which is the principal  market for these  securities.
     Stockholders of record as of January 31, 1999: Common - 4,773;  Preferred -
     none.

(c)  Includes excess reorganization value amortization of $42 million in each of
     the first and second quarters and $43 million in the third quarter of 1997.
     Excess  reorganization  value,  which was  established in connection with a
     financial restructuring in 1993, was eliminated as of September 30, 1997.
</TABLE>
<PAGE>
<TABLE>

                                                           USG CORPORATION
                                                  FIVE-YEAR SUMMARY (unaudited)
                                          (dollars in millions, except per share data)

                                                                             Years Ended December 31,
                                                              -----------------------------------------------------
                                                                  1998       1997        1996       1995      1994
                                                              ---------  ---------  ---------  ---------  --------
<CAPTION>
<S>                                                           <C>        <C>        <C>        <C>        <C>

Earnings Statement Data:
Net sales........................................             $   3,130  $   2,874  $   2,590  $   2,444  $   2,290
Gross profit.....................................                   884        787        645        603        517
Selling and administrative expenses..............                   299        281        268        244        244
Amortization of excess reorganization value......                     -        127        169        169        169
Operating profit.................................                   585        379        208        190        104
Interest expense.................................                    53         60         75         99        149
Interest income..................................                    (5)        (3)        (2)        (6)       (10)
Other expense, net...............................                     3          2          3         32          3
Income taxes.....................................                   202        172        117         97         54
Net earnings (loss)..............................                   332        148         15        (32)       (92)
Net Earnings (Loss) Per Common Share:
   Basic.........................................                  6.81       3.19       0.32      (0.71)     (2.14)
   Diluted.......................................                  6.61       3.03       0.31      (0.71)     (2.14)

Balance Sheet Data (as of the end of the period):
Working capital .................................                   368        264        159        167        311
Current ratio....................................                  1.86       1.70       1.41       1.46       1.83
Property, plant and equipment, net...............                 1,214        982        887        842        755
Total assets.....................................                 2,357      1,926      1,864      1,927      2,173
Total debt (a)...................................                   596        620        772        926      1,149
Total stockholders' equity (deficit).............                   518        147        (23)       (37)        (8)

Other Information:
EBITDA...........................................                   659        572        437        417        325
Capital expenditures.............................                   309        172        120        147         64
Gross margin %...................................                  28.2       27.4       24.9       24.7       22.6
EBITDA margin %..................................                  21.1       19.9       16.9       17.1       14.2
Stock price (per common share) (b)...............                 50.94      49.00      33.88      30.00      19.50
Average number of employees......................                13,700     13,000     12,500     12,400     12,300

(a) Total debt is shown at  principal  amounts  for all periods  presented.  The
carrying amounts of total debt (net of unamortized  reorganization  discount) as
reflected on the  consolidated  balance sheets as of December 31, 1996, 1995 and
1994, were $755 million, $907 million and $1,122 million, respectively.

(b) Stock price per common  share  reflects  the closing  price on December  31.
</TABLE>

<TABLE>

                                                    EXHIBIT 21

                                                   SUBSIDIARIES

     The companies listed below are the primary subsidiaries of the Corporation.
The financial  data for these  subsidiaries,  as well as for other  subsidiaries
that are not considered to be significant  and are therefore  excluded from this
exhibit,   comprised  the  Corporation's   consolidated   financial  statements.
<CAPTION> <S> <C>

                                                                                            Organized Under
Name of Company                                                                                 Laws of

Domestic:

United States Gypsum Company(a).........................................................       Delaware
USG Interiors, Inc. (a).................................................................       Delaware
L&W Supply Corporation (a)(b)...........................................................       Delaware
USG International, Ltd..................................................................       Delaware
USG Foreign Investments, Ltd. (a).......................................................       Delaware
USG Interiors International, Inc........................................................       Ohio
USG Funding Corporation.................................................................       Delaware
La Mirada Products Co., Inc.............................................................       Ohio
USG Foreign Sales Corporation...........................................................       Virgin Islands
Gypsum Engineering Company..............................................................       Delaware
Alabaster Assurance Company, Ltd........................................................       Vermont
H & B Gypsum, Inc. (c) .................................................................       Oklahoma
USG Latin America ......................................................................       Delaware


International:

CGC Inc. (a)............................................................................       Canada
USG Canadian Mining Ltd.................................................................       Ontario
Gypsum Transportation Limited...........................................................       Bermuda
Yeso Panamericano, S.A. de C.V..........................................................       Mexico
Grupo Yeso de Mexico, S.A. de C.V.......................................................       Mexico
Exploracion de Yeso,  S.A. de C.V.......................................................       Mexico
USG Manufacturing Worldwide, Ltd........................................................       Caymans
USG Interiors (Donn) S.A................................................................       Belgium
Donn Products GmbH......................................................................       Germany
USG Interiors Eastern Manufacturing Baulemente GmbH.....................................       Germany
USG Interiors East Innenausbau-vertriebsgesellschaft mbH................................       Germany
USG (U.K.) Ltd..........................................................................       United Kingdom
USG France S.A..........................................................................       France
USG (Netherlands) B.V...................................................................       Netherlands
USG Interiors (Europe) S.A..............................................................       Belgium
USG Interiors Coordination Centre S.A...................................................       Belgium
USG Europe, S.A.........................................................................       Belgium
USG Belgium Holdings S.A................................................................       Belgium
USG Asia Pacific Holdings Pty. Ltd......................................................       Singapore
USG Interiors Pacific Ltd...............................................................       New Zealand
USG Interiors Australia Pty. Ltd........................................................       Australia
USG Interiors (Far East) SDN BHD........................................................       Malaysia
Shenzhen USG Zhongbei Building Materials Co. (60% ownership)............................       China
Alabaster Engineering (Nederland) B.V...................................................       Netherlands
Red Top Technology (Nederland) B.V......................................................       Netherlands


(a) Accounts for material revenues.

(b) As of December  31,  1998,  L&W Supply  conducted  its  business  out of 187
locations in 36 states using various names registered  under applicable  assumed
business name statutes.

(c) Acquired on January 6, 1999.

</TABLE>



              EXHIBIT 23 CONSENT OF INDEPENDENT PUBLIC ACCOUNTANTS


As independent  public  accountants,  we hereby consent to the  incorporation by
reference of our reports dated January 22, 1999,  included in this Form 10-K for
the year ended  December  31,  1998,  into the  Corporation's  previously  filed
Registration  Statements Nos. 33-60563 and 33-64217 on Form S-3 and 33-22581, as
amended,  33-36303,  33-52715,  33-63554,  33-65383,  333-34147,  333-29137  and
33-11496 on Form S-8.





/s/Arthur Andersen LLP
- - ----------------------
ARTHUR ANDERSEN LLP

Chicago, Illinois
February 26, 1999



                                POWER OF ATTORNEY

KNOW ALL MEN BY THESE  PRESENTS,  that each  person  whose  name  appears  below
constitutes  and  appoints  Richard H.  Fleming,  Raymond  T. Belz,  and Dean H.
Goossen  and each of them,  his or her true  and  lawful  attorneys-in-fact  and
agents,  with full power of substitution and  resubstitution,  for and in his or
her name, place and stead, in any and all capacities,  to sign the Annual Report
on Form 10-K for the year ending December 31, 1998 of USG Corporation and any or
all amendments  thereto,  and to file the same, with all exhibits  thereto,  and
other  documents  in  connection  therewith,  with the  Securities  and Exchange
Commission,  granting unto said  attorneys-in-fact and agents, and each of them,
full  power  and  authority  to do and  perform  each and  every  act and  thing
requisite and  necessary to be done in and about the  premises,  as fully to all
intents and purposes as he or she might or could do in person,  hereby ratifying
and  confirming  all that said  attorneys-in-fact  and agents or any of them, or
their or his substitutes, may lawfully do or cause to be done by virtue hereof.
<TABLE>
This power of attorney has been signed as of the 10th day of February,  1999, by
the following persons:
<CAPTION>

<S>                                   <C>



/s/ William C. Foote                  /s/ W.H. Clark
- - --------------------------------      --------------------------------
William C. Foote,                     W.H. Clark,
Director, Chairman of the Board       Director
and Chief Executive Officer



/s/ P.J. O'Bryan                      /s/ James C. Cotting
- - --------------------------------      --------------------------------
P.J. O'Bryan,                         James C. Cotting,
Director, President and Chief         Director
Operating Officer



/s/ Robert L. Barnett                 /s/ Lawrence M. Crutcher
- - --------------------------------      --------------------------------
Robert L. Barnett,                    Lawrence M. Crutcher,
Director                              Director



/s/ Keith A. Brown                    /s/ W. Douglas Ford
- - --------------------------------      --------------------------------
Keith A. Brown,                       W. Douglas Ford,
Director                              Director



/s/ David W. Fox                      /s/ John B. Schwemm
- - --------------------------------      --------------------------------
David W. Fox,                         John B. Schwemm,
Director                              Director


/s/ Philip C. Jackson, Jr.            /s/ Judith A. Sprieser
- - --------------------------------      --------------------------------
Philip C. Jackson, Jr.                Judith A. Sprieser,
Director                              Director


/s/ Valerie B. Jarrett
- - --------------------------------
Valerie B. Jarrett
Director


/s/ Marvin E. Lesser
- - --------------------------------
Marvin E. Lesser
Director

</TABLE>

<TABLE> <S> <C>

<ARTICLE> 5
<MULTIPLIER> 1,000,000
       
<S>                                                   <C>
<PERIOD-TYPE>                                              12-MOS
<FISCAL-YEAR-END>                                        DEC-31-1998
<PERIOD-END>                                             DEC-31-1998
<CASH>                                                       152
<SECURITIES>                                                  0
<RECEIVABLES>                                                367
<ALLOWANCES>                                                 18
<INVENTORY>                                                  234
<CURRENT-ASSETS>                                             797
<PP&E>                                                      1,512
<DEPRECIATION>                                               298
<TOTAL-ASSETS>                                              2,357
<CURRENT-LIABILITIES>                                        429
<BONDS>                                                      561
                                         0
                                                   0
<COMMON>                                                      5
<OTHER-SE>                                                   513
<TOTAL-LIABILITY-AND-EQUITY>                                2,357
<SALES>                                                     3,130
<TOTAL-REVENUES>                                            3,130
<CGS>                                                       2,246
<TOTAL-COSTS>                                               2,246
<OTHER-EXPENSES>                                             299
<LOSS-PROVISION>                                              0
<INTEREST-EXPENSE>                                           53
<INCOME-PRETAX>                                              534
<INCOME-TAX>                                                 202
<INCOME-CONTINUING>                                          332
<DISCONTINUED>                                                0
<EXTRAORDINARY>                                               0
<CHANGES>                                                     0
<NET-INCOME>                                                 332
<EPS-PRIMARY>                                               6.81
<EPS-DILUTED>                                               6.61
        

</TABLE>


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