ELCOR CORP
10-Q, 2000-02-14
ASPHALT PAVING & ROOFING MATERIALS
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<PAGE>   1


                             SECURITIES AND EXCHANGE
                                   COMMISSION

                             Washington, D.C. 20549

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

                                    FORM 10-Q

                   Quarterly Report Under Section 13 or 15(d)
                     of the Securities Exchange Act of 1934

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


For Quarter Ended December 31, 1999                Commission File number 1-5341


                                ELCOR CORPORATION
            --------------------------------------------------------
             (Exact name of Registrant as specified in its charter)


         DELAWARE                                                 75-1217920
- ---------------------------                                  -------------------
(State or other jurisdiction of                              (I.R.S. Employer
incorporation or organization)                               Identification No.)


           14643 DALLAS PARKWAY
SUITE 1000, WELLINGTON CENTRE, DALLAS, TEXAS                          75240-8871
- --------------------------------------------                          ----------
(Address of principal executive offices)                              (Zip Code)

Registrant's telephone number, including area code                (972) 851-0500


         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   .
                                              ---    ---

         As of close of business on February 1, 2000, Registrant had outstanding
19,601,671 shares of Common Stock, Par Value $1 per Share.


<PAGE>   2



PART I.  FINANCIAL INFORMATION

ITEM 1.  Financial Statements

                                ELCOR CORPORATION
                           CONSOLIDATED BALANCE SHEET
                           (Unaudited, $ in thousands)

<TABLE>
<CAPTION>
                                                                         December 31,         June 30,
ASSETS                                                                       1999               1999
- ------                                                                   ------------        ----------
<S>                                                                      <C>                 <C>
CURRENT ASSETS
Cash and cash equivalents                                                $      3,270        $    4,186
Trade receivables, less allowance of $1,023 and $967                           51,259            72,866
Inventories -
         Finished goods                                                        20,809            15,377
         Work-in-process                                                          565               180
         Raw materials                                                         13,653            10,213
                                                                         ------------        ----------
                  Total inventories                                            35,027            25,770
                                                                         ------------        ----------

Prepaid expenses, insurance receivable and other                                4,918             8,352
Deferred income taxes                                                           2,413             2,111
                                                                         ------------        ----------
                  Total current assets                                         96,887           113,285
                                                                         ------------        ----------

PROPERTY, PLANT AND EQUIPMENT, AT COST                                        244,034           212,704
         Less - accumulated depreciation                                      (82,223)          (76,984)
                                                                         ------------        ----------
                  Property, plant and equipment, net                          161,811           135,720
                                                                         ------------        ----------

OTHER ASSETS                                                                    3,234             3,177
                                                                         ------------        ----------
                                                                         $    261,932        $  252,182
                                                                         ============        ==========
LIABILITIES AND SHAREHOLDERS' EQUITY
CURRENT LIABILITIES
Accounts payable                                                         $     24,961        $   18,067
Accrued liabilities                                                            15,910            15,817
                                                                         ------------        ----------
                  Total current liabilities                                    40,871            33,884
                                                                         ------------        ----------

LONG-TERM DEBT                                                                 49,300            63,000
DEFERRED INCOME TAXES                                                          18,749            18,047

SHAREHOLDERS' EQUITY -
         Common stock, $1 par                                                  19,988            19,988
         Paid-in-capital                                                       59,035            59,586
         Retained earnings                                                     80,156            64,632
                                                                         ------------        ----------
                                                                              159,179           144,206
         Less  -  Treasury stock (416,118 and 465,149 shares, at cost)         (6,167)           (6,955)
                                                                         ------------        ----------
                  Total shareholders' equity                                  153,012           137,251
                                                                         ------------        ----------
                                                                         $    261,932        $  252,182
                                                                         ============        ==========
</TABLE>

See accompanying notes to consolidated financial statements.

                                       1

<PAGE>   3



                                ELCOR CORPORATION
                      CONSOLIDATED STATEMENT OF OPERATIONS
                           (Unaudited, $ in thousands
                             except per share data)


<TABLE>
<CAPTION>
                                                   Three Months Ended        Six Months Ended
                                                 ----------------------    ----------------------
                                                 12-31-99     12-31-98     12-31-99     12-31-98
                                                 ---------    ---------    ---------    ---------
<S>                                              <C>          <C>          <C>          <C>
SALES                                            $  81,736    $  71,199    $ 177,525    $ 157,067
                                                 ---------    ---------    ---------    ---------

COST AND EXPENSES
       Cost of sales                                60,674       53,311      130,416      116,374
       Selling, general and administrative           9,838        9,812       19,350       20,084
                                                 ---------    ---------    ---------    ---------
INCOME FROM OPERATIONS                              11,224        8,076       27,759       20,609
                                                 ---------    ---------    ---------    ---------

OTHER INCOME (EXPENSE)
       Gain from involuntary conversion                889           --          889           --
       Interest expense, net                          (104)        (445)        (521)      (1,004)
                                                 ---------    ---------    ---------    ---------

INCOME BEFORE INCOME TAXES                          12,009        7,631       28,127       19,605
       Provision for income taxes                    4,538        2,953       10,647        7,401
                                                 ---------    ---------    ---------    ---------
INCOME BEFORE CUMULATIVE EFFECT OF
       CHANGE IN ACCOUNTING PRINCIPLE                7,471        4,678       17,480       12,204

CUMULATIVE EFFECT OF CHANGE IN
       ACCOUNTING PRINCIPLE                             --           --           --       (4,340)
                                                 ---------    ---------    ---------    ---------

NET INCOME                                       $   7,471    $   4,678    $  17,480    $   7,864
                                                 =========    =========    =========    =========

INCOME PER COMMON SHARE-BASIC:
       Before cumulative effect of
          change in accounting principle         $     .38    $     .24    $     .89    $     .62
       Cumulative effect of change
         in accounting principle                        --           --           --         (.22)
                                                 ---------    ---------    ---------    ---------
NET INCOME PER SHARE-BASIC                       $     .38    $     .24    $     .89    $     .40
                                                 =========    =========    =========    =========

INCOME PER COMMON SHARE-DILUTED:
       Before cumulative effect of change
          in accounting principle                $     .37    $     .24    $     .87    $     .61
       Cumulative effect of change in
          accounting principle                          --           --           --         (.22)
                                                 ---------    ---------    ---------    ---------
NET INCOME PER SHARE-DILUTED                     $     .37    $     .24    $     .87    $     .39
                                                 =========    =========    =========    =========

DIVIDENDS PER COMMON SHARE                       $     .05    $   .0467    $     .10    $   .0933
                                                 =========    =========    =========    =========
</TABLE>

See accompanying notes to consolidated financial statements.


                                       2
<PAGE>   4


                                ELCOR CORPORATION
                      CONSOLIDATED STATEMENT OF CASH FLOWS
                           (Unaudited, $ in thousands)

<TABLE>
<CAPTION>
                                                                          Six Months Ended
                                                                            December 31,
                                                                        --------------------
                                                                          1999        1998
                                                                        --------    --------
<S>                                                                     <C>         <C>
CASH FLOWS FROM OPERATING ACTIVITIES

         Net income                                                     $ 17,480    $  7,864
         Adjustments to reconcile net income
            to net cash provided by operating activities:

                  Depreciation and amortization                            5,254       4,532
                  Deferred income taxes                                      401         804
                  Gain from involuntary conversion                          (889)         --
                  Cumulative effect of change in accounting principle         --       4,340
                  Changes in assets and liabilities:
                     Trade receivables                                    21,607       8,366
                     Inventories                                          (9,257)      2,302
                     Prepaid expenses, insurance receivable and other      2,672         331
                     Accounts payable and accrued liabilities              6,987         (16)
                                                                        --------    --------

                  Net cash provided by operating activities               44,255      28,523
                                                                        --------    --------

CASH FLOWS FROM INVESTING ACTIVITIES

         Additions to property, plant and equipment                      (31,330)    (12,062)
         Insurance proceeds from involuntary conversion                    1,651       2,000
         Other                                                               (72)        999
                                                                        --------    --------

                  Net cash used for investing activities                 (29,751)     (9,063)
                                                                        --------    --------

CASH FLOWS FROM FINANCING ACTIVITIES

         Long-term borrowings, net                                       (13,700)    (14,500)
         Dividends on common stock                                        (1,956)     (1,818)
         Treasury stock transactions and other, net                          236      (6,026)
                                                                        --------    --------

                  Net cash used for financing activities                 (15,420)    (22,344)
                                                                        --------    --------

NET DECREASE IN CASH AND CASH EQUIVALENTS                                   (916)     (2,884)

CASH AND CASH EQUIVALENTS AT BEGINNING OF YEAR                             4,186       5,240
                                                                        --------    --------

CASH AND CASH EQUIVALENTS AT END OF PERIOD                              $  3,270    $  2,356
                                                                        ========    ========
</TABLE>

See accompanying notes to consolidated financial statements.


                                       3
<PAGE>   5


                                ELCOR CORPORATION
                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
                                   (Unaudited)

1.       The attached condensed consolidated financial statements have been
         prepared pursuant to the rules and regulations of the Securities and
         Exchange Commission. As a result, certain information and footnote
         disclosures normally included in financial statements prepared in
         accordance with generally accepted accounting principles have been
         condensed or omitted. The company believes that the disclosures
         included herein are adequate to make the information presented not
         misleading. These condensed consolidated financial statements should be
         read in conjunction with the consolidated financial statements and
         related notes included in the company's 1999 Annual Report on Form
         10-K. The unaudited financial information contained herein has been
         prepared in conformity with generally accepted accounting principles on
         a consistent basis and does reflect all adjustments which are, in the
         opinion of management, necessary for a fair presentation of the results
         of operations for the three-month and six-month periods ending December
         31, 1999 and 1998, but are, however, subject to year-end audit by the
         company's independent auditors. Because of seasonal, weather-related
         conditions in some of the Company's market areas, sales can vary at
         times, and results of any one quarter or other interim reporting period
         should not necessarily be considered as indicative of results for a
         full fiscal year.

2.       In the first quarter of fiscal 1999, the company adopted Statement of
         Position 98-5, "Reporting on the Costs of Start-Up Activities," issued
         by the Accounting Standards Executive Committee of the American
         Institute of Certified Public Accountants. This Statement of Position
         requires, among other things, companies to expense on a current basis
         previously capitalized start-up costs. Adoption of this Statement of
         Position resulted in a $4,340,000 charge, net of tax, and is reported
         as a cumulative effect of change in accounting principle on the
         Consolidated Statement of Operations for fiscal 1999.

3.       On September 15, 1998, the company experienced an explosion at its
         nonwoven fiberglass roofing mat plant in Ennis, Texas. The explosion
         significantly damaged a drying oven and caused less extensive damage to
         the remainder of the mat manufacturing line. There was no damage to a
         separate mat line that runs in parallel to the damaged line, nor was
         there any damage to the company's Ennis, Texas shingle manufacturing
         plant. There were no injuries from the explosion. The damaged line was
         restored to partial operation in December 1998. By March 1999, the
         damaged section had been replaced. In June 1999, the line was operating
         at line speeds equivalent to line speeds at the time of the explosion.

         The company has submitted claims totaling $17,492,000 for property
         damage and business interruption. As of December 31, 1999, the company
         had received insurance advances of $12,862,000. Operating income from
         some of the lost shingle sales portion of the business interruption
         claim had not been recorded to income at December 31, 1999. Assets with
         net book value of $3,990,000 were destroyed in the explosion and were
         insured for replacement value. As of December 31, 1999, the company had
         received replacement value payments on the property claim in excess of
         the net book value of destroyed assets in the amount of $889,000. This
         amount was recorded as a gain from involuntary conversion in December
         1999.


                                       4
<PAGE>   6


         In February 2000, the company reached a settlement with its insurance
         company, which resulted in the receipt of an additional $4,155,000 in
         claimed losses. Recognition into income of about $650,000 of gain from
         involuntary conversion and about $1,700,000 of income from the business
         interruption claim will be recorded in the March 2000 quarter.

4.       In the fourth quarter of fiscal 1999, management approved a
         consolidation plan for Chromium Corporation's reciprocating engine
         components business. All operations for this business activity at the
         Lufkin, Texas facility are being transferred to the Cleveland, Ohio
         plant. Costs to relocate equipment and other consolidation items with
         an estimated cost of $1,145,000 are expected to be incurred and
         recorded to expense in fiscal 2000. The majority of the consolidation
         costs were incurred in the December 1999 quarter. Subsequent to the
         completion of this business consolidation, the entire Lufkin, Texas
         facility will be used for Cybershield's products for digital wireless
         cellular phones and other electronic equipment.

5.       In June 1999, the Board of Directors declared a three-for-two stock
         split payable in the form of a stock dividend, which was distributed on
         August 11, 1999 to shareholders of record on July 15, 1999. Appropriate
         references to number of shares and to per share information in the
         consolidated financial statements as of December 31, 1998 have been
         adjusted to reflect the stock split on a retroactive basis.

6.       Effective January 5, 2000, the company increased its unsecured
         revolving credit facility from $100,000,000 to $125,000,000 and
         extended its term to December 15, 2004. There were no significant
         changes to the financial covenants or to the interest rate the company
         pays for either LIBOR based borrowings or prime rate based borrowings
         or to the commitment fee paid for the unused portion of the line.

7.       In accordance with the requirements of FASB SFAS No. 131, the company
         is segregated into two segments: Roofing Products and Industrial
         Products. The Roofing Products Group consists of the various operating
         subsidiaries of Elk Corporation of Dallas (collectively Elk). These
         companies manufacture and sell premium laminated fiberglass asphalt
         residential and accessory roofing products, together with nonwoven mats
         used in manufacturing asphalt roofing products and various industrial
         applications.

         The Industrial Products Group is comprised of three businesses: (1)
         products used in digital wireless cellular phones and other electronic
         equipment; (2) remanufactured large diesel reciprocating engine
         components used in the railroad and marine transportation industries;
         and (3) technology licensing and consulting services for the natural
         gas processing and sulfer recovery industries.

         Historically, the first two businesses in the Industrial Products Group
         were operated as separate divisions of Chromium Corporation. Effective
         July 1, 1999, Chromium's operations were segregated into separate
         companies. The reciprocating engine components business will continue
         to do business as Chromium Corporation (Chromium) and the conductive
         coatings and related products business will be operated as subsidiaries
         of Cybershield, Inc. (Cybershield). The technology licensing and
         consulting services business will continue to be conducted as Ortloff
         Engineers, LTD (OEL).


                                       5
<PAGE>   7


Financial information by company segment is summarized as follows (in
thousands):

<TABLE>
<CAPTION>
                                     Three Months Ended         Six Months Ended
                                        December 31,              December 31,
                                   ----------------------    ----------------------
                                     1999         1998         1999         1998
                                   ---------    ---------    ---------    ---------
<S>                                <C>          <C>          <C>          <C>
SALES
Roofing products                   $  68,830    $  62,366    $ 151,769    $ 139,280
Industrial products                   12,861        8,798       25,667       17,737
Corporate and eliminations                45           35           89           50
                                   ---------    ---------    ---------    ---------
                                   $  81,736    $  71,199    $ 177,525    $ 157,067
                                   =========    =========    =========    =========
OPERATING PROFIT
Roofing products                   $  11,318    $   9,445    $  27,595    $  22,145
Industrial products                    1,407        1,089        2,936        2,631
Corporate and other                   (1,501)      (2,458)      (2,772)      (4,167)
                                   ---------    ---------    ---------    ---------
                                      11,224        8,076       27,759       20,609

Gain from involuntary conversion         889           --          889           --
Interest expense, net                   (104)        (445)        (521)      (1,004)
                                   ---------    ---------    ---------    ---------
Income before income taxes         $  12,009    $   7,631    $  28,127    $  19,605
                                   =========    =========    =========    =========

IDENTIFIABLE ASSETS
Roofing products                   $ 212,863    $ 169,820    $ 212,863    $ 169,820
Industrial products                   31,620       18,054       31,620       18,054
Corporate                             17,449       13,030       17,449       13,030
                                   ---------    ---------    ---------    ---------
                                   $ 261,932    $ 200,904    $ 261,932    $ 200,904
                                   =========    =========    =========    =========
DEPRECIATION AND AMORTIZATION
Roofing products                   $   2,110    $   2,016    $   4,211    $   3,955
Industrial products                      499          242          967          488
Corporate                                 38           44           76           89
                                   ---------    ---------    ---------    ---------
                                   $   2,647    $   2,302    $   5,254    $   4,532
                                   =========    =========    =========    =========
CAPITAL EXPENDITURES
Roofing products                   $  16,130    $   4,521    $  25,372    $   6,724
Industrial products                    1,456        1,212        3,379        2,648
Corporate                              1,134        1,292        2,579        2,690
                                   ---------    ---------    ---------    ---------
                                   $  18,720    $   7,025    $  31,330    $  12,062
                                   =========    =========    =========    =========
</TABLE>


                                       6
<PAGE>   8


8.       Basic earnings per share is computed based on the average number of
         common shares outstanding. Diluted earnings per share includes
         adjustments for the number of shares subject to outstanding stock
         options. The following table sets forth the computation of basic and
         diluted earnings per share (in thousands):

<TABLE>
<CAPTION>
                                           Three Months Ended    Six Months Ended
                                              December 31,         December 31,
                                           ------------------   -------------------
                                             1999      1998       1999       1998
                                           --------  --------   --------   --------
<S>                                        <C>       <C>        <C>        <C>
Net income                                 $  7,471  $  4,678   $ 17,480   $  7,864
                                           ========  ========   ========   ========

Denominator for basic earnings
per share - weighted average
shares outstanding                           19,564    19,485     19,546     19,589

Effect of dilutive securities:
Employee stock options                          507       383        481        345
                                           --------  --------   --------   --------

Denominator for dilutive earnings
per share - adjusted weighted
average shares and assumed
issuance of shares purchased
under incentive stock option plan
using the treasury stock method              20,071    19,868     20,027     19,934
                                           ========  ========   ========   ========

Basic earnings per share                   $    .38  $    .24   $    .89   $    .40
                                           ========  ========   ========   ========

Diluted earnings per share                 $    .37  $    .24   $    .87   $    .39
                                           ========  ========   ========   ========
</TABLE>


                                       7
<PAGE>   9


ITEM 2. Management's Discussion and Analysis of Results of Operations and
Financial Condition

RESULTS OF OPERATIONS

CHANGES IN THE THREE-MONTH PERIOD ENDED DECEMBER 31, 1999 COMPARED TO THE
THREE-MONTH PERIOD ENDED DECEMBER 31, 1998.

     During the three-month period ended December 31, 1999, net income increased
60% to $7,471,000 from $4,678,000 in the three-month period ended December 31,
1998. Sales increased 15% to $81,736,000 in the current year quarter compared to
$71,199,000 in the prior year period. The increases in sales and operating
income reflected rapidly accelerating demand for Cybershield's products used in
digital wireless cellular phones, together with a strong level of shipments for
Elk's Prestique(R) premium laminated fiberglass asphalt shingles and roofing mat
products. During the three-month period ended December 31, 1999, the company
recorded $889,000 from involuntary conversion as a result of replacement value
payments on a property claim in excess of the net book value of destroyed
assets. See Note 3 on page 4 of this Form 10-Q for further information on this
claim.

     Sales for the Roofing Products Group increased 10% to $68,830,000 for the
three months ended December 31, 1999 compared to $62,366,000 in the same prior
year quarter. Elk continued to achieve strong sales levels for its nonwoven mats
used in manufacturing asphalt roofing products and various industrial
applications. Demand remained strong for Elk's premium laminated fiberglass
asphalt shingles. However, shipments in the current year quarter were held down
by lower laminated shingle inventories as a result of a 22% increase in demand
during the twelve months ended September 30, 1999 coupled with manufacturing
inefficiencies related to Elk's use of alternative sources of nonwoven
fiberglass mat in its manufacturing process as a result of the nonwoven mat
plant accident referred to above. Lost sales and operating profit related to the
inventory shortage were partially offset by $1,130,000 of business interruption
insurance recoveries recognized during the quarter ended December 31, 1999.
Average selling prices were also slightly higher in the second quarter of fiscal
2000 compared to the same prior year quarter. Operating income for the Roofing
Products Group increased 20% to $11,318,000 in the three months ended December
31, 1999 compared to $9,445,000 in the prior year quarter, primarily as a result
of higher sales.

     Sales for the Industrial Products Group increased 46% in the three-month
period ended December 31, 1999 to $12,861,000 from $8,798,000 in the same prior
year quarter. Operating income for the Industrial Products Group increased 29%
to $1,407,000 in the current year quarter compared to $1,089,000 in the prior
year quarter. Cybershield's sales more than doubled for the three-month period
ended December 31, 1999 and operating profit rose substantially compared to the
same prior year quarter. This continuing growth is primarily the result of
rapidly accelerating demand for digital wireless handsets, combined with a
significant increase in the number of value added products and services provided
to the digital wireless cellular phone industry by Cybershield.

     Significantly higher sales and operating results for Cybershield were
offset by a 30% decrease in sales and an $866,000 operating loss at Chromium,
which experienced lower demand for remanufactured diesel engine components used
in the railroad and marine transportation industries. The operating loss
included over $800,000 of nonrecurring costs to relocate equipment and other
consolidation related items incurred in transferring its manufacturing
operations in Lufkin, Texas to Cleveland, Ohio. When the relocation is completed
in the March 2000 quarter, Chromium's operating expenses will have been reduced
by about $1,000,000 per year as a result of this consolidation. OEL, the
company's patent licensing and engineering consulting services business,
reported lower revenues


                                       8
<PAGE>   10


and operating income for the three months ended December 31, 1999 compared to
the same quarter in the prior fiscal year.

     Overall selling, general and administrative costs (SG&A) in the three-month
period ending December 31, 1999 were only slightly higher than in the same
period in the prior fiscal year despite the 15% increase in revenues. As a
percentage of sales, SG&A costs were 12.0% of sales in the current year quarter
compared to 13.8% in the prior year quarter.

     Interest expense for the three months ended December 31, 1999 was lower
than in the same quarter last year. The company capitalized $509,000 of interest
in the current year quarter in connection with the construction of its new
Myerstown, Pennsylvania shingle plant and other major projects.

CHANGES IN THE SIX-MONTH PERIOD ENDED DECEMBER 31, 1999 COMPARED TO THE
SIX-MONTH PERIOD ENDED DECEMBER 31, 1998.

     During the six-month period ended December 31, 1999, net income before last
year's cumulative effect of a change in accounting principle increased 43% to
$17,480,000 from $12,204,000 in last year's first half. Sales increased 13%
compared to the prior year period. The increases in sales and net income before
the accounting change were primarily the result of rapidly increasing demand for
Cybershield's products used in digital wireless cellular phones, combined with
strong shipments of roofing mat products and premium laminated fiberglass
asphalt shingles. In the first quarter of fiscal 1999, the company adopted
Statement of Position 98-5, "Reporting on the Costs of Start-Up Activities,"
issued by the Accounting Standards Executive Committee of the American Institute
of Certified Public Accountants, which resulted in a $4,340,000 charge, net of
tax, for the cumulative effect of this accounting change. This one-time
cumulative charge reduced last year's first half net income to $7,864,000
compared to $17,480,000 in the first half of the current fiscal year.

     Sales for the Roofing Products Group increased 9% to $151,769,000 for the
six months ended December 31, 1999 compared to $139,280,000 in the same period
last year. Despite strong demand for Elk's premium laminated asphalt shingles,
shipments were held down by lower laminated shingle inventories at the beginning
of the current fiscal year as a result of a 24% increase in demand during the
last nine months of fiscal 1999. Strong sales increases were achieved for
nonwoven mats used in manufacturing asphalt roofing products and various
industrial applications. Operating income for the Roofing Products Group
increased 25% in the first half of fiscal 2000 to $27,595,000 from $22,145,000
in the prior year period, primarily as a result of strong sales of premium
laminated fiberglass asphalt shingles and nonwoven fiberglass mats, together
with improved margins from increased manufacturing output. During the first half
of fiscal 2000, Elk was able to largely offset increasing asphalt and glass
fiber raw material costs by increasing laminated shingle prices. As a result of
rapidly escalating crude oil prices, asphalt costs for the month of January
2000 were about 30% higher than in the same month last year. Further asphalt
price increases are expected in February 2000. In addition, prices for glass
fiber are expected to be about 10% higher in the March 2000 quarter compared to
the same quarter last year. About one-half of the higher raw material costs
expected in the March 2000 quarter should be offset by higher selling prices
for Elk Prestique laminated shingles.

     Raw material cost increases not offset by higher selling prices are
presently expected to reduce net income by about $1,000,000 in the March 2000
quarter. If asphalt prices increase beyond their price level in early February
2000, the reduction in net income may be higher. If Elk Prestique laminated
shingle price increases announced for late March 2000 are successfully
implemented, the higher raw material cost increases currently being experienced
should be fully offset in the June 2000 quarter, provided that raw material
costs stabilize at current levels.

     Sales for the Industrial Products Group increased 45% in the first half of
fiscal 2000 to $25,667,000 from $17,737,000 in the same period in the prior
fiscal year. Operating income for the Industrial Products Group increased 12% in
the six months ended December 31, 1999 to $2,936,000 compared to $2,631,000 in
the same period last year. Sales of Cybershield's advanced shielding products
and related services for the digital wireless cellular phone industry more than
doubled in the first six months of fiscal 2000 and Cybershields' operating
profit nearly doubled compared to the first six months in the prior fiscal year.
The current year results include Cybershield's Canton, Georgia


                                       9
<PAGE>   11


operation, which was acquired in January 1999 as YDK America, Inc. This new
company generated positive operating income during the first half of fiscal 2000
after incurring initial operating losses in the latter half of fiscal 1999. In
addition to the strong growth in demand for digital wireless handsets, recent
significant orders for new business in other areas include shielding of a new
laptop computer for one of the largest computer manufacturers, shielding of
components for telecommunications switching equipment for a leading
manufacturer, high performance coatings for magnesium components of lightweight
digital video projectors used for computerized business presentations, and
shielding of bar code readers for a leading manufacturer.

    Cybershield plans to expand its digital wireless cellular phone business to
serve the European, Asian and Latin American markets over the next few years
through acquisition or other business arrangements to better serve its
customers' growing markets for digital wireless cellular phones and other
digital wireless electronic products. Cybershield is planning to establish
operations in Europe by the summer of calendar year 2000 before pursuing other
global growth opportunities.

     For the first six months of fiscal 2000, Chromium Corporation's sales
decreased 31% compared to the same prior year period as a result of lower demand
for remanufactured diesel engine components used in the railroad and marine
transportation industries. Excluding nonrecurring items relating to the
consolidation of its manufacturing operations, Chromium's operating results were
near break-even in the first six months of fiscal 2000 compared to a small
operating profit achieved in the first half last year. Revenues for OEL's patent
licensing and engineering consulting services were lower in the first half of
fiscal 2000 compared to the same six month period last year, but operating
profit was slightly higher. Management expects some improvement at OEL in the
second half of fiscal 2000 because of higher demand for its services resulting
from higher oil prices.

     Overall SG&A costs in the six-month period ending December 31, 1999 were
lower than in the same period in the prior fiscal year. In the prior year, the
company adjusted its medical and casualty self-insurance reserves to reflect
escalating cost trends and recorded a write-off of certain computer related
items. As a percentage of sales, SG&A costs were 10.9% of sales in the first
half of fiscal 2000 compared to 12.8% in the prior year period.

     Interest expense in the first half of fiscal 2000 was lower than in the
same period last year, as the company capitalized $784,000 of interest in the
current year period in connection with the construction of its new Myerstown,
Pennsylvania shingle plant and other major projects.

FINANCIAL CONDITION

     During the first six months of fiscal 2000, the company generated cash
flows of $44,255,000 from operating activities. Of this total, $22,469,000 was
the result of the significantly reduced level of working capital. The decrease
in working capital was primarily due to a significant seasonal decrease in trade
receivables, and increased current liabilities, partially offset by higher
inventories. The higher level of current liabilities was primarily attributable
to the normal timing of vendor payments and payables associated to the
construction of a new roofing plant. Trade receivables were lower primarily due
to seasonality in the roofing products business. The trade receivable balance at
the end of fiscal 1999 was unusually high as a result of a 28% year-to-year
increase in sales during the last two months of fiscal 1999 (the period to which
most outstanding receivables at June 30, 1999 apply). Higher inventories were
primarily attributable to seasonality and to increased raw materials, which
reflected the purchase of certain raw materials in anticipation of price
increases. The current ratio at December 31, 1999 was 2.4:1 compared to 3.3:1 at
June 30, 1999. Historically, working capital requirements fluctuate during the
year because of seasonality in some market areas. Generally, working capital
requirements and related borrowings are higher in the spring and summer months,
and lower in the fall and winter months.


                                       10
<PAGE>   12


     The company used $29,751,000 for investing activities in the first six
months of fiscal 2000. Most expenditures were for additions to property, plant
and equipment. About $22,000,000 of capital expenditures in the first six months
of fiscal 2000 were for the purchase of land and construction costs relating to
the new $70,000,000 Myerstown, Pennsylvania premium laminated fiberglass asphalt
shingle plant. This new facility is expected to be completed next fall with
manufacturing operations scheduled to begin in the December quarter of calendar
year 2000. The Myerstown plant is expected to increase the company's overall
laminated shingle capacity by about 38%. The company plans to invest about
$137,000,000 over a three-year period beginning in fiscal 2000, including the
costs to build the new roofing plant, together with expenditures to expand
capacity and improve productivity at existing plants, to install production
lines for new products and to increase capacity for Cybershield's digital
wireless cellular phone business. The company expects to incur about $75,000,000
of these capital expenditures in fiscal 2000.

     Cash flows used for financing activities were $15,420,000 during the first
six months of fiscal 2000, primarily resulting from dividend payments and a
$13,700,000 decrease in long-term debt. Long-term debt represented 24% of the
$202,312,000 of invested capital (long-term debt plus shareholders' equity) at
December 31, 1999.

     In September 1998, the company's Board of Directors authorized the purchase
of up to $10,000,000 of common stock from time to time on the open market to be
used for general corporate purposes. As of December 31, 1999, 129,992 shares
with a cumulative cost of $1,771,000 had been repurchased under this
authorization.

     Effective January 5, 2000, the company increased its revolving credit
facility from $100,000,000 to $125,000,000 and extended the facility to December
15, 2004 to support its capital expansion program. Management believes that
current cash and cash equivalents, cash flows from operations and its unsecured
revolving credit facility should be sufficient during fiscal 2000 and beyond to
fund its currently planned capital expenditures, working capital needs,
dividends, stock repurchases and other cash requirements.

     The company's operations are subject to extensive federal, state and local
laws and regulations relating to environmental matters. Although the company
does not believe it will be required to expend amounts which will have a
material adverse effect on the company's consolidated financial position or
results of operations by reason of environmental laws and regulations, such laws
and regulations are frequently changed and could result in significantly
increased cost of compliance. Further, certain of the company's industrial
products operations utilize hazardous materials in their production processes.
As a result, the company incurs costs for remediation activities off-site and at
its facilities from time to time. The company establishes and maintains reserves
for such remediation activities, when appropriate. Current reserves established
for known or probable remediation activities are not material to the company's
financial position or results of operations.


                                       11
<PAGE>   13


YEAR 2000 ISSUE

     The company is currently developing a new information system for most of
its critical financial, distribution and manufacturing applications. While the
primary purpose of the new information system is to modernize and improve the
company's operations, it is also expected to resolve the Year 2000 issues in
these critical computer systems. The system was completed and implemented at all
but one location as of December 31, 1999 at an estimated total cost of about
$12,000,000. Implementation at one operating location has been deferred until
the first quarter of calendar year 2000. This location will continue to utilize
the company's existing information system until the new system is implemented.
The company has completed all testing and remedial programming for the existing
computer system and believes this existing system to be Year 2000 compliant.
Costs to develop the new information system are being capitalized. Other costs
relating to Year 2000 readiness projects have been about $425,000.

     As of February 14, 2000, the company has experienced no significant
problems relating to its Year 2000 readiness. Activities within the company and
with its suppliers and other third parties are continuing to be monitored.

FORWARD-LOOKING STATEMENTS

This Form 10-Q contains "forward-looking statements" about the company's
prospects for the future. Such statements are subject to certain risks and
uncertainties which could cause actual results to differ materially from those
projected. Such risks and uncertainties include, but are not limited to, the
following:

         1.       The company's roofing products business is substantially
                  non-cyclical, but can be affected by weather, the availability
                  of financing and general economic conditions. In addition, the
                  asphalt roofing products manufacturing business is highly
                  competitive. Actions of competitors, including changes in
                  pricing, or slowing demand for asphalt roofing products due to
                  general or industry economic conditions or the amount of
                  inclement weather could result in decreased demand for the
                  company's products, lower prices received or reduced
                  utilization of plant facilities. Further, changes in building
                  codes and other standards from time to time can cause changes
                  in demand, or increases in costs that may not be passed
                  through to customers.

         2.       In the asphalt roofing products business, the significant raw
                  materials are ceramic coated granules, asphalt, glass fibers,
                  resins and mineral filler. Increased costs of raw materials
                  can result in reduced margins, as can higher trucking and rail
                  costs. Historically, the company has been able to pass some of
                  the higher raw material and transportation costs through to
                  the customer. Should the company be unable to recover higher
                  raw material and/or transportation costs from price increases
                  of its products, operating results could be adversely affected
                  and/or lower than projected.

         3.       The company expects to make up to $137 million in new
                  investments to expand capacity and improve productivity at
                  existing plants and to build new plants over a three-year
                  period beginning in fiscal 2000. Progress in achieving
                  anticipated operating efficiencies and financial results is
                  difficult to predict for new plant facilities. If such
                  progress is slower than anticipated, if substantial cost
                  overruns occur in building new plants, or if demand for
                  products produced at new plants does not meet current
                  expectations, operating results could be adversely affected.


                                       12
<PAGE>   14


         4.       Certain facilities of the company's industrial products
                  subsidiaries must utilize hazardous materials in their
                  production process. As a result, the company could incur costs
                  for remediation activities at its facilities or off-site, and
                  other related exposures from time to time in excess of
                  established reserves for such activities.

         5.       The company's litigation, including its patent infringement
                  suits against GAF Building Materials Corporation and certain
                  affiliates, is subject to inherent and case-specific
                  uncertainty. The outcome of such litigation depends on
                  numerous interrelated factors, many of which cannot be
                  predicted.

         6.       Although the company currently anticipates that most of its
                  needs for new capital in the near future will be met with
                  internally generated funds and borrowings under its existing
                  loan facility, significant increases in interest rates could
                  substantially affect its borrowing costs under its existing
                  loan facility, or its cost of alternative sources of capital.

         7.       Each of the company's businesses, especially its Cybershield's
                  digital wireless cellular phone business, is subject to the
                  risks of technological changes that could affect the demand
                  for or the relative cost of the company's products and
                  services, or the method and profitability of the method of
                  distribution or delivery of such products and services. In
                  addition, the company's businesses each could suffer
                  significant setbacks in revenues and operating income if it
                  lost one or more of its largest customers, or if its
                  customers' plans and/or markets should change significantly.

         8.       Although the company insures itself against physical loss to
                  its manufacturing facilities, including business interruption
                  losses, natural or other disasters and accidents, including
                  but not limited to fire, earthquake, damaging winds and
                  explosions, operating results could be adversely affected if
                  any of its manufacturing facilities became inoperable for an
                  extended period of time due to such events.

         9.       Each of the company's businesses is actively involved in the
                  development of new products, processes and services which are
                  expected to contribute to the company's ongoing long-term
                  growth and earnings. If such development activities are not
                  successful, or the company cannot provide the requisite
                  financial and other resources to successfully commercialize
                  such developments, the growth of future sales and earnings may
                  be adversely affected.

     Parties are cautioned not to rely on any such forward-looking beliefs or
judgments in making investment decisions.


                                       13
<PAGE>   15


PART II.  OTHER INFORMATION

ITEM 1: Legal Proceedings

         GAF Patent Litigation

         On February 9, 2000, Elk and GAF stipulated to a dismissal of all
claims and counterclaims in the utility patent case. Trial on Elk's trade dress
claim in the design case, including GAF's counterclaims, is unscheduled but
pending. GAF's motion for attorneys fees also is pending.

         While management can give no assurances regarding the ultimate outcome
of the remaining litigation, even if the outcome were to be adverse to Elk, it
is not expected to have a material adverse effect on the Registrant's financial
position or liquidity.

         Gibraltar Tort Litigation

         On February 7, 2000, the settlement with the plaintiffs in the
remaining Gibraltar tort litigation was consummated. The settlement, which was
accrued in the fourth quarter of fiscal 1999, did not have a material adverse
effect on the Registrant's results of operations, financial position or
liquidity.

         On November 22, 1999, Cybershield of Texas, Inc. (f/k/a Chromium
Corporation) filed suit in County Court in Dallas County, Texas, against its
primary and umbrella/excess insurance carriers seeking recovery of its defense
costs, and certain other damages, in connection with the Gibraltar tort
litigation. The coverage litigation is not expected to have a material effect on
the Registrant's results of operations, financial position or liquidity.

ITEM 4:  Submission of Matters to a Vote of Security Holders

(a)      The company's Annual Meeting of Shareholders was held on October 26,
         1999 for the purpose of electing two directors ratifying the
         appointment of the company's independent auditors.

(b)      Directors Elected:                              NUMBER OF VOTES
                                                         ---------------
<TABLE>
<CAPTION>
                                                                    AUTHORITY
                                                       FOR           WITHHELD
                                                       ---          ---------
<S>                                                 <C>                <C>
                 David W. Quinn                     16,681,341         87,612
                 Richard J. Rosebery                16,676,092         92,861
</TABLE>

                 Other Directors Whose Term Continued After the Meeting:

                 James E. Hall
                 Thomas D. Karol
                 Dale V. Kesler
                 William F. Ortloff*
                 Harold K. Work

                 *Mr. Ortloff passed away October 27, 1999


                                       14
<PAGE>   16


   (c)   Other matters voted upon at the meeting and the number of
         affirmative votes, negative votes and abstentions.

<TABLE>
<CAPTION>
                                                                NUMBER OF VOTES
                                                  ----------------------------------------

                                                  AFFIRMATIVE     AGAINST      ABSTENTIONS
                                                  -----------     -------      -----------
<S>                                               <C>             <C>          <C>
                 Ratification of Arthur
                 Andersen LLP as
                 independent auditors of
                 the company for the fiscal
                 year ending June 30, 2000         16,689,740      36,463           42,750
</TABLE>

ITEM 6:  Exhibits and Reports of Form 8-K

   (a)   Exhibit:

         Exhibit (4.11): Fifth Amendment dated January 5, 2000 to Loan Agreement
         dated September 29, 1993 among Elcor Corporation, Bank of America,
         N.A., as Issuer, Administrative Lender, and Lender; and Comerica
         Bank-Texas, Bank of Tokyo-Mitsubishi, Ltd., The Frost National Bank,
         and Bank One, Texas, N.A., as Lenders.

         Exhibit (27): Financial Data Schedule (EDGAR submission only).

   (b)   The registrant filed one report on Form 8-K during the quarter ended
         December 31, 1999. The registrant filed a Form 8-K on October 19, 1999
         relating to a press release containing "forward-looking statements"
         about its prospects for the future.


                                       15
<PAGE>   17
                                   SIGNATURES


Pursuant to the requirements of the Securities and Exchange Act of 1934, the
Registrant has duly caused this report to be signed on its behalf by the
undersigned thereunto duly authorized.



                                           ELCOR CORPORATION



DATE:    February 14, 2000                 /s/ Richard J. Rosebery
     --------------------------            -------------------------------------
                                           Richard J. Rosebery
                                           Vice Chairman, Chief Financial &
                                           Administrative Officer and Treasurer

                                           /s/ Leonard R. Harral
                                           -------------------------------------
                                           Leonard R. Harral
                                           Vice President and Chief
                                           Accounting Officer



                                       16


<PAGE>   18




                                 EXHIBIT INDEX



<TABLE>
<CAPTION>
EXHIBIT
NUMBER                           DESCRIPTION
- -------                          -----------
<S>                <C>
Exhibit (4.11):    Fifth Amendment dated January 5, 2000 to Loan Agreement dated
                   September 29, 1993 among Elcor Corporation, Bank of America,
                   N.A., as Issuer, Administrative Lender, and Lender; and
                   Comerica Bank-Texas, Bank of Tokyo-Mitsubishi, Ltd., The
                   Frost National Bank and Bank One, Texas, N.A., as Lenders.

Exhibit (27):      Financial Data Schedule (EDGAR submission only).

                   The registrant filed one report on Form 8-K during the
                   quarter ended December 31, 1999. The registrant filed a Form
                   8-K on October 19, 1999 relating to a press release
                   containing "forward-looking statements" about its prospects
                   for the future.
</TABLE>


<PAGE>   1
                                                                    EXHIBIT 4.11


                        FIFTH AMENDMENT TO LOAN AGREEMENT


         THIS FIFTH AMENDMENT TO LOAN AGREEMENT (this "Fifth Amendment"), dated
as of January 5, 2000, is entered into among ELCOR CORPORATION, a Delaware
corporation ("Company"), the lenders listed on the signature pages hereof
("Lenders"), BANK OF AMERICA, N.A. (formerly known as NationsBank, N.A.,
successor by merger to NationsBank of Texas, N.A.), as Issuer (in said capacity,
"Issuer"), and BANK OF AMERICA, N.A. (formerly known as NationsBank, N.A.,
successor by merger to NationsBank of Texas, N.A.), as Administrative Lender (in
said capacity, "Administrative Lender").


                                   BACKGROUND

         A. Company, Lenders, Issuer and Administrative Lender are parties to
that certain Loan Agreement, dated as of September 29, 1993, as amended by that
certain First Amendment to Loan Agreement, dated as of October 31, 1994, that
certain Second Amendment to Loan Agreement, dated as of December 15, 1995, that
certain Third Amendment to Loan Agreement, dated as of October 31, 1996, and
that certain Fourth Amendment to Loan Agreement, dated as of December 15, 1997
(said Loan Agreement, as amended, the "Loan Agreement"; the terms defined in the
Loan Agreement and not otherwise defined herein shall be used herein as defined
in the Loan Agreement).

         B. Company, Lenders, Issuer and Administrative Lender desire to amend
the Loan Agreement to (i) increase the Commitment to $125,000,000, (ii) extend
the Termination Date, (iii) add Bank One, Texas, N.A. as a Lender thereto ("Bank
One"), and (iv) make certain other amendments thereto.

         NOW, THEREFORE, in consideration of the covenants, conditions and
agreements hereafter set forth, and for other good and valuable consideration,
the receipt and adequacy of which are all hereby acknowledged, Company, Lenders,
Issuer and Administrative Lender covenant and agree as follows:

         1. AMENDMENTS TO LOAN AGREEMENT.

         (a) The dollar amount of "$100,000,000" set forth in the Background
paragraph of the Loan Agreement is hereby amended to be "$125,000,000".

         (b) The definition of "Applicable Law" set forth in Section 1.1 of the
Loan Agreement is hereby amended to read as follows:

                  "Applicable Law" means (a) in respect of any Person, all
         provisions of constitutions, statutes, rules, regulations and orders of
         governmental bodies or regulatory agencies applicable to such Person
         and its properties, including, without limiting the foregoing, all
         orders and decrees of all courts and arbitrators in proceedings or
         actions to which the Person


<PAGE>   2


         in question is a party, and (b) in respect of contracts relating to
         interest or finance charges that are made or performed in the State of
         Texas, "Applicable Law" shall mean the laws of the United States of
         America, including, without limitation, 12 USC Sections 85 and 86, as
         amended from time to time, and any other statute of the United States
         of America now or at any time hereafter prescribing the maximum rates
         of interest on loans and extensions of credit, and the laws of the
         State of Texas, including, without limitation, Art. 1H, if applicable,
         and if Art. 1H is not applicable, Art. 1D, and any other statute of the
         State of Texas now or at any time hereafter prescribing maximum rates
         of interest on loans and extensions of credit; provided that the
         parties hereto agree pursuant to Texas Finance Code Section 346.004
         that the provisions of Chapter 346 of the Texas Finance Code shall not
         apply to Advances, Reimbursement Obligations, this Agreement, the Notes
         or any other Loan Papers.

         (c) The definition of "Commitment" set forth in Section 1.1 of the Loan
Agreement is hereby amended to read as follows:

                  "Commitment" means as to any Lender, the amount set forth
         opposite such Lender's name under the column titled "Commitment" on
         Schedule 7 hereto, as the same may be reduced or terminated pursuant to
         Article 2, which at no time shall exceed such Lender's Specified
         Percentage of $125,000,000.

         (d) The definition of "Consolidated Debt" set forth in Section 1.1 of
the Credit Agreement is hereby amended to read as follows:

                  "Consolidated Debt" means for Company and its Subsidiaries on
         a consolidated basis determined in accordance with GAAP, at any time,
         without duplication, an amount equal to the sum of (i) Capital Leases,
         debt created, issued, incurred or assumed for money borrowed or for the
         capitalized deferred purchase price of property or services purchased
         (excluding accounts payable in the ordinary course of business) and the
         fair value (any net liability that is required to be carried on the
         Company's consolidated balance sheet) of any Interest Hedge Agreement
         minus (ii) cash in excess of $2,000,000.

         (e) The definition of "Guaranty Agreement" set forth in Section 1.1 of
the Loan Agreement is hereby amended to read as follows:

                  "Guaranty Agreement" means each Guaranty Agreement executed by
         certain Subsidiaries, in substantially the form of Exhibit B hereto, as
         amended, modified, restated or supplemented from time to time.

         (f) The definition of "Highest Lawful Rate" set forth in Section 1.1 of
the Loan Agreement is hereby amended to read as follows:


                                      - 2 -

<PAGE>   3



                  "Highest Lawful Rate" means at the particular time in question
         the maximum rate of interest which, under Applicable Law, Lenders are
         then permitted to charge on the Obligations. If the maximum rate of
         interest which, under Applicable Law, the Lenders are permitted to
         charge on the Obligations shall change after the date hereof, the
         Highest Lawful Rate shall be automatically increased or decreased, as
         the case may be, from time to time as of the effective time of each
         change in the Highest Lawful Rate without notice to the Company. For
         purposes of determining the Highest Lawful Rate under the Applicable
         Law of the State of Texas, the applicable rate ceiling shall be (a) the
         weekly rate ceiling described in and computed in accordance with the
         provisions of Art. 1D.003, or (b) if the parties subsequently contract
         as allowed by Applicable Law, the quarterly ceiling or the annualized
         ceiling computed pursuant to Art. 1D.008; provided, however, that at
         any time the weekly rate ceiling, the quarterly ceiling or the
         annualized ceiling shall be less than 18% per annum or more than 24%
         per annum, the provisions of Art. 1D.009(a) and (b) shall control for
         purposes of such determination, as applicable.

         (g) The definition of "Loan Papers" set forth in Section 1.1 of the
Loan Agreement is hereby amended to read as follows:

                  "Loan Papers" means this Agreement, the Notes, each Guaranty
         Agreement, any Interest Hedge Agreement entered into with any Lender or
         any affiliate of any Lender in the ordinary course of business and
         which is not for speculative purposes, and all other documents to be
         executed by Company or any of its Subsidiaries pursuant to the terms of
         this Agreement, all as amended, modified, restated or supplemented from
         time to time.

         (h) The definition of "Obligations" set forth in Section 1.1 of the
Loan Agreement is hereby amended to read as follows:

                  "Obligations" means all present and future obligations
         (including all Reimbursement Obligations), indebtedness and
         liabilities, and all renewals and extensions of all or any part
         thereof, of Company to Administrative Lender, Issuer and Lenders (or
         any affiliate of any Lender) arising from, by virtue of, or pursuant to
         this Agreement, the Notes, the Guaranty Agreement or any other Loan
         Papers, and any and all renewals and extensions thereof, or any part
         thereof, or future amendments thereto, all interest accruing on all or
         any part thereof and reasonable attorneys' fees and other reasonable
         expenses incurred in the enforcement or the collection of all or any
         part thereof, whether such obligations, indebtedness and liabilities
         are direct, indirect, fixed, contingent, joint, several, or joint and
         several.

         (i) The definition of "Restricted Investments" set forth in Section 1.1
of the Loan Agreement is hereby amended by (i) deleting "and" at the end of
clause (g) thereof, (ii) adding a new clause (h) thereto to read as follows:
"(h) Investments in or advances to Foreign Subsidiaries not to exceed in
aggregate amount at any time the lesser of (i) $30,000,000 or (ii) on a cost
basis 20% of Consolidated Net Worth; and", (iii) re-lettering former clause (h)
as clause (i) and amending such clause (i) as follows: "(i) Investments either
(i) in excess of what would otherwise be the maximum

                                      - 3 -

<PAGE>   4



amount for such type of investment under the provision of this definition of
Restricted Investments (but excluding additional Investments in Foreign
Subsidiaries); or (ii) in any Person or Property not otherwise permitted by this
definition of Restricted Investments; but which, in the aggregate do not exceed,
at the time of and after giving effect to any such investments, on a cost basis
$10,000,000."

         (j) The definition of "Termination Date" set forth in Section 1.1 of
the Loan Agreement is hereby amended to read as follows:

                  "Termination Date" means December 15, 2004, or such earlier
         date that the Commitment is terminated or such later date that the
         Commitment is extended pursuant to Section 2.19 hereof.

         (k) Section 1.1 of the Loan Agreement is hereby amended by adding the
following defined terms thereto in proper alphabetical order to read as follows:

                  "Art. 1D" means Article 5069-1D, Title 79, Revised Civil
         Statutes of Texas, 1925, as amended.

                  "Art. 1H" means Article 5069-1H, Title 79, Revised Civil
         Statutes of Texas, 1925, as amended.

                  "Consolidated Net Worth" means, for Company and its
         Subsidiaries, on a consolidated basis, determined in accordance with
         GAAP, total stockholders' equity.

                  "Foreign Subsidiary" means any Subsidiary of Company or any of
         its Subsidiaries which is not organized under the Laws of the United
         States of America or the District of Columbia.

                  "Interest Hedge Agreements" means any and all agreements,
         devices or arrangements designed to protect at least one of the parties
         thereto from the fluctuations of interest rates, exchange rates or
         forward rates applicable to such party's assets, liabilities or
         exchange transactions, including, but not limited to,
         dollar-denominated or cross-currency interest rate exchange agreements,
         forward currency exchange agreements, interest rate cap or collar
         protection agreements, forward rate currency or interest rate options,
         puts and warrants, as the same may be amended or modified and in effect
         from time to time, and any and all cancellations, buy backs, reversals,
         terminations or assignments of any of the foregoing.

         (l) Section 2.11(d) of the Loan Agreement is hereby amended to read as
follows:

                  "(d) After acceleration of the Obligations pursuant to Section
         7.2, all payments in respect of the Obligations (and payments under the
         Guaranty Agreements) shall be applied by the Administrative Lender in
         the following order of priority: (i) to the payment of Administrative
         Lender's expenses incurred on behalf of Lenders then due and payable,
         if any;

                                      - 4 -

<PAGE>   5



         (b) to the payment of all other fees then due and payable; (iii) to the
         payment of interest then due and payable on the Advances and
         Reimbursement Obligations; (iv) to the payment of all other amounts not
         otherwise referred to in this clause (d) then due and payable under
         this Agreement and the Notes; and (v) to the payment of principal then
         due and payable on the Advances and Reimbursement Obligations, and in
         the case of any payments under the Guaranty Agreements, to pay any
         other obligations to any Guarantied Party (as defined in the Guaranty)
         not covered above, ratably among the Guarantied Parties in accordance
         with the aggregate principal amount of Advances and the Reimbursement
         Obligations and, in case of payment under any Guaranty Agreement, the
         obligations guaranteed thereby, owed to each Guarantied Party.

         (m) Section 5.9 of the Loan Agreement is hereby amended by (i) deleting
"and" at the end of clause (e), (ii) deleting "." at the end of clause (f)
thereof and adding "; and" in lieu thereof; and (iii) adding a new clause (g)
thereto to read as follows:

                  "(g) Liens on property of Foreign Subsidiaries to secure
         Indebtedness of Foreign Subsidiaries to the extent such Indebtedness is
         permitted pursuant to the terms of Section 5.27 of this Agreement."

         (n) Section 5.15 of the Loan Agreement is hereby amended to read as
follows:

                  "5.15. Restricted Payments. Company shall not declare or make
         any Restricted Payments; provided that, after giving effect to any
         proposed Restricted Payment, no Default or Event of Default shall have
         occurred or be continuing, the Company may make Restricted Payments
         during the term of this Agreement not to exceed the sum of (i)
         $10,000,000 plus (or minus in the case of a deficit), (ii) 35% of
         cumulative Consolidated Net Income (100% in the case of a deficit) for
         the period commencing July 1, 1993 and ending on the date such proposed
         Restricted Payment is to be made, plus (iii) without duplication, the
         amount of cash received by Company as a result of the sale or
         disposition of capital stock of Company acquired in a Treasury Stock
         Purchase."

         (o) Section 5.23 of the Loan Agreement is hereby amended to read as
follows:

                  "5.23. Guaranties by New Subsidiaries. Company shall cause
         each Subsidiary which Company or any of its Subsidiaries forms during
         the term of this Agreement which is not a Foreign Subsidiary to execute
         and deliver to Administrative Lender a Guaranty Agreement, together
         with a certified copy of a resolution of the board of directors (or
         other authorizing document of the appropriate governing body or Person)
         of such new Subsidiary authorizing the execution and delivery of the
         Guaranty Agreement and the performance of its terms."

         (p) Article 5 of the Loan Agreement is hereby amended by adding new
Sections 5.26 and 5.27 thereto to read as follows:



                                      - 5 -

<PAGE>   6



                  "5.26 Year 2000 Compliance. Company and its Subsidiaries will
         be Year 2000 Compliant, except to the extent that the failure to do so
         could not reasonably be expected to have a Material Adverse Effect.
         Company will promptly notify Administrative Lender in the event Company
         discovers or determines that any computer application (including those
         of its suppliers and vendors) that is material to its or any of its
         Subsidiaries' business and operations will not be Year 2000 Compliant
         on a timely basis, except to the extent that such failure could not
         reasonably be expected to have a Material Adverse Effect.

                  5.27 Foreign Subsidiary Indebtedness. Notwithstanding anything
         herein to the contrary, (i) no Foreign Subsidiary shall create, assume,
         incur or otherwise become or remain obligated in respect of any, or
         permit to be outstanding, or suffer to exist any Debt, except Debt for
         working capital and other general corporate purposes not to exceed
         $20,000,000 in aggregate amount, and (ii) Company and no other
         Subsidiary which is not a Foreign Subsidiary shall Guaranty any Debt of
         a Foreign Subsidiary except to the extent that the Debt is otherwise
         permitted pursuant to clause (i) above."

         (q) Article 6 of the Loan Agreement is hereby amended by adding a new
Section 6.16 thereto to read as follows:

                  "6.16 Year 2000 Compliance. Company has (i) initiated a review
         and assessment of all areas within its and each of its Subsidiaries'
         business and operations (including those affected by suppliers and
         vendors) that could be adversely affected by the "Year 2000 Problem"
         (that is, the risk that computer applications used by Company or any of
         its Subsidiaries (or its suppliers and vendors) may be unable to
         recognize and perform properly date-sensitive functions involving
         certain dates prior to and any date after December 1, 1999), (ii)
         developed a plan and timeline for addressing the Year 2000 Problem on a
         timely basis, and (iii) to date, implemented that plan in accordance
         with the timetable, except where the failure to so initiate, develop or
         implement could not reasonably be expected to have a Material Adverse
         Effect. Company reasonably believes that all computer applications
         (including those of its suppliers and vendors) that are material to its
         or any of its Subsidiaries' business and operation will on a timely
         basis be able to perform properly date-sensitive functions for all
         dates before and after January 1, 2000 (that is, be "Year 2000
         Compliant"), except to the extent that a failure to do so could not
         reasonably be expected to have a Material Adverse Effect."

         (r) The Guaranty Agreement is hereby amended to be in the form of
Exhibit B attached to this Fifth Amendment.

         (s) Schedule 1 to the Loan Agreement is hereby amended to be in the
form of Schedule 1 to this Fifth Amendment.

         (t) Schedule 4 to the Loan Agreement is hereby amended to be in the
form of Schedule 4 to this Fifth Amendment.


                                      - 6 -

<PAGE>   7




         (u) Schedule 6 to the Loan Agreement is hereby amended and supplemented
as set forth on Schedule 6 to this Fifth Amendment.

         (v) Schedule 7 to the Loan Agreement is hereby amended to be in the
form of Schedule 7 to this Fourth Amendment, and the Specified Percentage of
Bank One is established and the applicable Specified Percentages of the other
Lenders are amended as provided therein.

         2. DISSOLUTION OF SUBSIDIARIES. Upon completion of the sale of certain
assets of M Machinery Company Incorporated, a Delaware corporation ("M
Machinery"), M Machinery, M Service Corporation, a Delaware corporation, and GA
Industries Corporation, a Delaware corporation (collectively, the "Dissolving
Subsidiaries"), will be dissolved. As a result thereof, Company has requested
that Lenders (a) consent to the dissolution of the Dissolving Subsidiaries and
(b) not require that the Dissolving Subsidiaries execute the Guaranty Agreement
to be executed in conjunction with this Fifth Amendment. Lenders hereby (a)
consent to the dissolution of the Dissolving Subsidiaries and (b) agree that the
Dissolving Subsidiaries shall not be required to execute the Guaranty Agreement,
provided that (i) the aggregate value of the assets of the Dissolving
Subsidiaries shall not exceed $2,000,000 and (ii) contributions to or
investments in the Dissolving Subsidiaries after the date of this Fifth
Amendment shall not exceed $500,000.

         3. REPRESENTATIONS AND WARRANTIES TRUE; NO EVENT OF DEFAULT. By its
execution and delivery hereof, Company represents and warrants that, as of the
date hereof and after giving effect to the amendments contemplated by the
foregoing Section 1:

         (a) the representations and warranties contained in the Loan Agreement
are true and correct on and as of the date hereof as if made on and as of such
date;

         (b) no event has occurred and is continuing which constitutes a Default
or an Event of Default;

         (c) Company has full power and authority to execute and deliver this
Fifth Amendment, the $25,000,000 Note payable to the order of Bank One, Texas,
N.A. in the form of Exhibit A hereto (the "Bank One Note"), the $50,000,000 Note
payable to the order of Bank of America, N.A. in form of Exhibit C hereto (the
"Bank of America Note"), and this Fifth Amendment, the Loan Agreement, as
amended hereby, the Bank One Note and the Bank of America Note constitute the
legal, valid and binding obligations of Company, enforceable in accordance with
their respective terms, except as enforceability may be limited by applicable
debtor relief laws and by general principles of equity (regardless of whether
enforcement is sought in a proceeding in equity or at law) and except as rights
to indemnity may be limited by federal or state securities law;

         (d) neither the execution, delivery and performance of this Fifth
Amendment, the Bank One Note, the Bank of America Note or the Loan Agreement, as
amended hereby, nor the consummation of any transactions contemplated herein or
therein, will conflict with any Law to


                                      - 7 -

<PAGE>   8



which Company or any Subsidiary is subject, or any indenture, agreement or other
instrument to which Company or any Subsidiary or any of their respective
property is subject; and

         (e) no authorization, approval, consent, or other action by, notice to,
or filing with, any governmental authority or other Person (other than the Board
of Directors of Company), is required for the execution, delivery or performance
by Company of this Fifth Amendment, the Bank One Note or the Bank of America
Note or the acknowledgment of this Fifth Amendment by each Subsidiary which
executed the Guaranty Agreement (a "Guarantor").

         4. CONDITIONS OF EFFECTIVENESS. This Fifth Amendment shall be effective
as of January 5, 2000, subject to the following:

         (a) Administrative Lender shall have received counterparts of this
Fifth Amendment executed by each Lender and Issuer;

         (b) Administrative Lender shall have received counterparts of this
Fifth Amendment executed by Company;

         (c) Bank One shall have received its Bank One Note executed by Company;

         (d) Administrative Lender shall have received the Bank America Note
executed by Company;

         (e) the representations and warranties set forth in Section 2 of this
Fifth Amendment shall be true and correct;

         (f) Administrative Lender shall have received certified copies of
resolutions of Company authorizing execution, delivery and performance of this
Fifth Amendment and the Bank One Note;

         (g) Each Lender shall have received an amendment fee in an amount equal
to the product of (a) 0.05% multiplied by each Lender's portion of the
Commitment;

         (h) Administrative Lender shall have received a Guaranty Agreement (in
the form of Exhibit B to this Fifth Amendment) executed by each Guarantor; and

         (i) Administrative Lender shall have received, in form and substance
satisfactory to Administrative Lender and its counsel, such other documents,
certificates and instruments as Administrative Lender shall require.



                                      - 8 -

<PAGE>   9



         5. REFERENCE TO THE LOAN AGREEMENT.

         (a) Upon the effectiveness of this Fifth Amendment, each reference in
the Loan Agreement to "this Agreement", "hereunder", or words of like import
shall mean and be a reference to the Loan Agreement, as affected and amended by
this Fifth Amendment.

         (b) The Loan Agreement, as amended by this Fifth Amendment, and all
other Loan Papers shall remain in full force and effect and are hereby ratified
and confirmed.

         6. COSTS, EXPENSES AND TAXES. Company agrees to pay on demand all costs
and expenses of Administrative Lender in connection with the preparation,
reproduction, execution and delivery of this Fifth Amendment, the Notes, and the
other instruments and documents to be delivered hereunder (including the
reasonable fees and out-of-pocket expenses of counsel for Administrative Lender
with respect thereto and with respect to advising Administrative Lender as to
its rights and responsibilities under the Loan Agreement, as amended by this
Fifth Amendment).

         7. ADVANCES. Upon effectiveness of this Agreement, each of the
appropriate Lenders, through the Administrative Lender, by assignments,
purchases and adjustments (which shall occur and shall be deemed to occur
automatically upon such effectiveness), shall have purchased or sold such
Advances so that after giving effect to such assignments, purchases and
adjustments, each Lender shall hold Advances and Reimbursement Obligations in
accordance with its Specified Percentage, as established or amended hereby. The
parties hereto agree that the requirements of Section 9.1 of the Loan Agreement
with respect to assignments are hereby waived for purposes of this Fifth
Amendment only. Each Lender selling and assigning all or any portion of an
Advance and Reimbursement Obligations hereby represents and warrants that such
interest being sold is free and clear of any Lien or adverse claim. Bank One (a)
confirms that it has received a copy of the Loan Agreement and the other Loan
Papers, together with copies of the financial statements referred to in Sections
5.5 and 6.2 of the Loan Agreement and such other documents and information as it
has deemed appropriate to make its own credit analysis and decision to enter
into this Fifth Amendment, (b) agrees that it will, independently and without
reliance upon the Administrative Lender, or any other Lender, and based on such
documents and information as it shall deem appropriate at the time, continue to
make its own credit decisions in taking or not taking action under the Loan
Agreement and the other Loan Papers, (c) appoints and authorizes the
Administrative Lender to take such action as agent on its behalf and to exercise
such powers under the Loan Agreement and the other Loan Papers as are delegated
to the Administrative Lender by the terms thereof, together with such powers as
are reasonably incidental thereto and hereto, and (d) agrees that it will
perform in accordance with its terms all of the obligations which by the terms
of the Loan Agreement, the other Loan Papers, and this Assignment and are
required to be performed by it as a Lender.

         8. EXECUTION IN COUNTERPARTS. This Fifth Amendment may be executed in
any number of counterparts and by different parties hereto in separate
counterparts, each of which when so executed and delivered shall be deemed to be
an original and all of which taken together shall constitute but one and the
same instrument.



                                      - 9 -

<PAGE>   10


         9. GOVERNING LAW; BINDING EFFECT. This Fifth Amendment shall be
governed by and construed in accordance with the laws of the State of Texas and
shall be binding upon Company, each Lender, Issuer and Administrative Lender and
their respective successors and assigns.

         10. HEADINGS. Section headings in this Fifth Amendment are included
herein for convenience of reference only and shall not constitute a part of this
Fifth Amendment for any other purpose.

         11. ENTIRE AGREEMENT. THE LOAN AGREEMENT, AS AMENDED BY THIS FIFTH
AMENDMENT, AND THE OTHER LOAN PAPERS REPRESENT THE FINAL AGREEMENT BETWEEN THE
PARTIES AS TO THE SUBJECT MATTER THEREIN AND HEREIN AND MAY NOT BE CONTRADICTED
BY EVIDENCE OF PRIOR, CONTEMPORANEOUS, OR SUBSEQUENT ORAL AGREEMENTS BETWEEN THE
PARTIES.


================================================================================
                   REMAINDER OF PAGE LEFT INTENTIONALLY BLANK
================================================================================



                                     - 10 -

<PAGE>   11



         IN WITNESS WHEREOF, the parties hereto have executed this Fifth
Amendment as of the date first above written.

                                         ELCOR CORPORATION



                                         By:
                                            ------------------------------------
                                            Richard J. Rosebery
                                            Vice Chairman, Chief Financial and
                                            Administrative Officer and Treasurer





                                     - 11 -

<PAGE>   12



                                        BANK OF AMERICA, N.A., as Administrative
                                        Lender, Lender and Issuer



                                        By:
                                           -------------------------------------
                                           Name:
                                                --------------------------------
                                           Title:
                                                 -------------------------------




                                     - 12 -

<PAGE>   13



                                        BANK ONE, TEXAS, N.A.



                                        By:
                                           -------------------------------------
                                           Name:
                                                --------------------------------
                                           Title:
                                                 -------------------------------




                                     - 13 -

<PAGE>   14



                                        THE FROST NATIONAL BANK



                                        By:
                                           -------------------------------------
                                           Name:
                                                --------------------------------
                                           Title:
                                                 -------------------------------



                                     - 14 -

<PAGE>   15



                                        COMERICA BANK - TEXAS



                                        By:
                                           -------------------------------------
                                           Name:
                                                --------------------------------
                                           Title:
                                                 -------------------------------





                                     - 15 -

<PAGE>   16



                                        THE BANK OF TOKYO-MITSUBISHI, LTD.



                                        By:
                                           -------------------------------------
                                           Name:
                                                --------------------------------
                                           Title:
                                                 -------------------------------





                                     - 16 -

<PAGE>   17



                                   SCHEDULE 1

                                  CONFIDENTIAL

                               EXISTING LITIGATION

         The following Schedule 1 to the Fifth Amendment to Loan Agreement dated
November 5, 1999, among the Company, certain lenders, Bank of America, N.A.,
formerly known as NationsBank, N.A., successor by merger to NationsBank of
Texas, N.A., as Issuer and Bank of America, N.A. as Administrative Lender,
amends and restates the items set forth in Schedule 1 to the Loan Agreement
dated September 29, 1993 among the parties, as amended pursuant to the First
Amendment to Loan Agreement dated October 31, 1994, the Second Amendment to Loan
Agreement dated December 15, 1995, the Third Amendment to Loan Agreement dated
October 31, 1996, and the Fourth Amendment to Loan Agreement dated December 15,
1997. Schedule 1 is amended and restated in its entirety as set forth herein.

         The following describes pending or, to the knowledge of the Company,
threatened litigation which, in the opinion of its management, could have a
Material Adverse Effect on the Company.

         GAF Patent Litigation

         On February 8, 1994, the Company's wholly owned subsidiary, Elk
Corporation of Dallas (Elk) was granted a design patent covering the ornamental
aspects of certain Elk Shingles. On December 6, 1994, Elk was granted a utility
patent on the functional aspects of certain Elk shingles. Elk sued GAF Building
Materials Corporation and related GAF entities (collectively, GAF) in federal
court for infringement of these patents and trade dress. In the design patent
case, Elk seeks to recover as damages the total profit that GAF has made from
the infringing shingles. In the utility patent case, Elk seeks to recover as
damages a reasonable royalty on GAF's sales of infringing shingles and certain
lost profits.

         GAF filed counterclaims seeking a declaratory judgment that the Elk
patents are not infringed and are either invalid or unenforceable. GAF also
asserted claims for unfair competition, Lanham Act violations based on alleged
false advertising, and common law fraud, generally praying for damages of not
less than $25 million including actual and punitive damages, plus interest,
costs, and reasonable attorney fees. To date, GAF has not produced any evidence
of damages. Elk disputes GAF's claims, and management intends vigorously to
defend them and to enforce its intellectual property rights.

         In April 1998, the District Court for the Northern District of Texas
entered a partial final judgment in the design patent case based on an
inequitable conduct ruling and certified the case for appeal. On February 11,
1999, the United States Court of Appeals for the Federal Circuit (Court of
Appeals) issued a decision upholding the district court's partial final judgment
against Elk in its design patent case. The decision held that the district court
committed no reversible error in finding Elk's design patent unenforceable. On
April 16, 1999, the Court of Appeals denied Elk's petition for


<PAGE>   18


a rehearing of the case. On October 4, 1999, the United States Supreme Court
denied Elk's petition for certiorari in the case.

         Trials on the trade dress claim in the design case, and in the utility
patent case, including GAF's counterclaims in the cases, are unscheduled but
pending. GAF's motion for attorneys fees also is pending.

         While management can give no assurances regarding the ultimate outcome
of the remaining litigation, even if the outcome were to be adverse to Elk, it
is not expected to have a Material Adverse Effect on the Company.


         Gibraltar Tort Litigation

         In December 1995 through August 1996, Chromium Corporation was sued in
four separate tort lawsuits brought by the same attorneys on behalf of numerous
plaintiffs who alleged unspecified personal injuries and property damages
associated with the former operation of a licensed hazardous waste treatment,
storage and disposal facility near Winona in Smith County, Texas known as the
Gibraltar facility. The four suits were brought against or expanded to include
the current and former owners and operators of the facility, and more than fifty
other defendants, including Chromium and several Fortune 500 companies, as
generators of waste sent to the facility (as named in a particular lawsuit,
"Generator Defendants"). The facility owners and Chromium's insurers declined or
failed to accept Chromium's claims relating to defense and indemnity from the
Gibraltar suits.

         The plaintiffs non-suited or dismissed the Generator Defendants from
two of the cases. In another case, Williams, et al. v. Akzo Nobel Chemicals,
Inc., et al., the Smith County (Texas) District Court dismissed Chromium and
certain other Generator Defendants, but the ruling dismissing these Generator
Defendants was reversed on appeal. Trial for twelve of the approximately 650
plaintiffs in the fourth case, Adams v. American Ecology Environmental Services
Corporation, a related case pending in the Tarrant County (Texas) District, was
set for November 1999.

         In June 1999, the Company entered into a settlement agreement under
which it agreed with plaintiffs in the pending Gibraltar cases to a resolution
of the cases. The terms of settlement under the agreement did not and, if
consummated in accordance with the terms of the settlement agreement, will not
have a Material Adverse Effect on the Company, whether or not Chromium is able
to collect through indemnification from the facility owners or insurers the
settlement amount or its defense costs. Chromium accrued the settlement in the
fourth quarter of fiscal 1999.


         White v. Elcor Corporation

         Joseph White, an ex-employee of the former Chromium Corporation (now
known because of a name change as Cybershield of Texas, Inc.), brought suit in
state district court in Angelina


                                      - 2 -

<PAGE>   19



County, Texas, against the Company to recover damages for alleged bodily
injuries (kidney failure) that Mr. White claims are due to exposure to chromium
at the Lufkin plant facility. Mr. White had previously filed a workers
compensation lawsuit against Chromium's workers compensation carrier after
unsuccessfully pursuing a claim for workers compensation benefits under the
administrative procedures provided under the Texas workers compensation statute.
The administrative decision was that Mr. White was not entitled to benefits
because there was no or inadequate evidence that his condition was due to
occupational exposure to chromium. Mr. White's lawsuit against Chromium's
workers compensation carrier still is pending.

         The Company's motions for summary judgment in the litigation against it
are pending. Management believes the case against the Company and Chromium's
workers compensation carrier both are without merit. The Company believes suit
against the Company was brought to attempt to circumvent the limitations of
employer liability under the Texas workers compensation statute. The Company
intends vigorously to defend the White lawsuit. Neither of the two White
lawsuits is expected to have a Material Adverse Effect on the Company.


         Other

         There are various other lawsuits and claims pending against the Company
and/or its subsidiaries arising in the ordinary course of their businesses. In
the opinion of the Company's management based in part on advice of counsel, none
of these actions should have a Material Adverse Effect on the Company.




                                      - 3 -

<PAGE>   20



                                   SCHEDULE 4

                                  CONFIDENTIAL


                           FIXED ASSETS HELD FOR SALE


The following Schedule 4 to the Fifth Amendment to Loan Agreement dated November
5, 1999, among the Company, certain lenders, Bank of America, N.A., formerly
known as NationsBank, N.A., successor by merger to NationsBank of Texas, N.A.,
as Issuer and Bank of America, N.A. as Administrative Lender, amends and
restates the items set forth in Schedule 4 to the Loan Agreement dated September
29, 1993 among the parties, as amended pursuant to the First Amendment to Loan
Agreement dated October 31, 1994, the Second Amendment to Loan Agreement dated
December 15, 1995, the Third Amendment to Loan Agreement dated October 31, 1996,
and the Fourth Amendment to Loan Agreement dated December 15, 1997. Schedule 4
is amended and restated in its entirety as set forth herein.

1.       Homes purchased under employee relocation programs.

2.       Land, offices and other facilities formerly occupied by Mosley
         Machinery Company, Inc. in Waco, Texas. Sale of the property to a third
         party for a gross sales price of approximately $600,000 is pending.

3.       Chromium Corporation has discontinued the large-bore cylinder liner
         segment of its plating business and is holding for sale certain fully
         depreciated equipment at its Lufkin plant formerly used in that
         business, including certain hones, plating anodes/fixtures and related
         equipment. Sale of that equipment "as is" to a third party for a
         nominal sum is pending.



<PAGE>   21



                                   SCHEDULE 6


BANK OF AMERICA, N.A.
901 Main Street
Dallas, Texas 75202


BANK ONE, TEXAS, N.A.
1717 Main Street, 3rd Floor
Dallas, Texas 75201


THE FROST NATIONAL BANK
4200 South Hulen Street
Fort Worth, Texas 76109


COMERICA BANK - TEXAS
1300 Northpark Center
Dallas, Texas 75225


THE BANK OF TOKYO-MITSUBISHI, LTD.
3150 Trammell Crow Center
2001 Ross Avenue
Dallas, Texas 75201


<PAGE>   22



                                   SCHEDULE 7



<TABLE>
<CAPTION>
                                                                    SPECIFIED
      LENDER                         COMMITMENT                     PERCENTAGE
      ------                         ----------                     ----------
<S>                                 <C>                           <C>
Bank of America, N.A.                $50,000,000                    40.00%
Bank One, Texas, N.A.                $25,000,000                    20.00%
The Frost National Bank              $20,000,000                    16.00%
Comerica Bank - Texas                $15,000,000                    12.00%
The Bank of Tokyo-Mitsubishi, Ltd.   $15,000,000                    12.00%
</TABLE>



<PAGE>   23



                                    EXHIBIT A

                                 PROMISSORY NOTE

$25,000,000.00                                            Dated: January 5, 2000

         FOR VALUE RECEIVED, the undersigned, ELCOR CORPORATION, a Delaware
corporation ("Company"), hereby promises to pay to the order of BANK ONE, TEXAS,
N.A. ("Lender") the principal amount of each Advance made by Lender to Company
pursuant to the Loan Agreement (as hereinafter defined). All Advances remaining
unpaid shall be repaid in full on the Termination Date. Company promises to pay
interest on the unpaid principal balance of each Advance from the date of such
Advance until said principal amount is paid in full, at the times and at the
rate or rates as specified in the Loan Agreement.

         Both principal and interest are payable in lawful money of the United
States of America to Bank of America, N.A., as Administrative Lender, at 901
Main Street, Dallas, Texas 75202, in immediately available funds. Each Advance
made by Lender to Company pursuant to the Loan Agreement and all payments made
on account of principal hereof shall be recorded by Lender and, prior to any
transfer hereof, endorsed on the grid attached hereto which is part of this
Note; provided, however, failure to make any such recordation or endorsement
shall not affect the obligations of Company hereunder or under the Loan
Agreement.

         This Note is one of the Notes referred to in, and is entitled to the
benefits of and obligations pertaining to, the Loan Agreement dated as of
September 29, 1993 (said Loan Agreement, as amended, modified or supplemented
from time to time, the "Loan Agreement") among Company, Lender, certain other
Lenders, and Bank of America, N.A., as Administrative Lender.

         The Loan Agreement, among other things, (i) provides for the making of
Advances by Lender to Company from time to time in an aggregate amount not to
exceed at any time outstanding the U.S. dollar amount first above mentioned, the
indebtedness of Company resulting from each such Advance being evidenced by this
Note, and (ii) contains provisions for acceleration of the maturity hereof upon
the happening of certain stated events and also for prepayments on account of
principal hereof prior to the maturity hereof upon the terms and conditions
therein specified. All terms not expressly defined herein shall have the same
definitions as set forth in the Loan Agreement.

                                       ELCOR CORPORATION



                                       By:
                                          -------------------------------------
                                          Richard J. Rosebery
                                          Vice Chairman, Chief Financial and
                                          Administrative Officer and Treasurer



<PAGE>   24


                                    EXHIBIT B

                               GUARANTY AGREEMENT


         THIS GUARANTY AGREEMENT, dated as of January 5, 2000 (this "Guaranty"),
is made by each of the parties listed on the signature pages hereof, each in its
capacity as a guarantor (the "Guarantors") of the obligations of Elcor
Corporation, a Delaware corporation ("Company"), under the Loan Agreement
(defined below) among Company, each lender a party thereto (each of said lenders
being herein called a "Lender" or collectively the "Lenders"), Bank of America,
N.A. (formerly known as NationsBank, N.A., successor by merger to NationsBank of
Texas, N.A.) as issuer of letters of credit ("Issuer"), and Bank of America,
N.A., as Administrative Lender for Lenders and Issuer under the Loan Agreement
(in such capacity herein called "Administrative Lender") and under the other
Loan Papers (as defined in said Loan Agreement).

         PRELIMINARY STATEMENT. Lenders and Company have entered into the Loan
Agreement, dated as of September 29, 1993 (said Loan Agreement, as it may have
been heretofore and may be hereafter amended or otherwise modified from time to
time, being the "Loan Agreement"). The capitalized terms not otherwise defined
herein have the meanings specified in the Loan Agreement. Company may, subject
to the terms of the Loan Agreement and the other Loan Papers, request that
Lenders make Advances and that Issuer issue Letters of Credit for the account of
Company and other Joint Account Parties. It is a requirement of the Fifth
Amendment to the Loan Agreement, dated as of January 5, 2000, that each
Guarantor execute and deliver this Guaranty. Each Guarantor has determined that
it will receive substantial benefit if the Advances are made to Company and
Letters of Credit are issued for the account of Company and other Joint Account
Parties pursuant to the terms of the Loan Agreement. Administrative Lender, the
Issuer, the Lenders and any affiliate of any Lender entering into an Interest
Hedge Agreement (provided that such Lender was a Lender at the time such
Interest Hedge Agreement was entered into) are herein referred to collectively
as "Guarantied Parties".

         NOW, THEREFORE, in consideration of the premises and in order to induce
the Lenders to make Advances and Issuer to issue Letters of Credit under the
Loan Agreement, Guarantors hereby agree as follows:

         A. Guaranty. Each Guarantor, jointly and severally, hereby
unconditionally guarantees the punctual payment of, and promises to pay, when
due, whether at stated maturity, by mandatory prepayment, by acceleration or
otherwise, all obligations, indebtedness and liabilities, and all
rearrangements, renewals and extensions of all or any part thereof, of Company,
each of the other Guarantors and each other Obligor now or hereafter arising
from, by virtue of or pursuant to the Loan Agreement, the Notes, any Interest
Hedge Agreement, and any other Loan Paper, and any and all renewals and
extensions thereof, or any part thereof, or future amendments thereto, whether
for principal, interest (including, without limitation, interest accruing or
becoming owing both prior to and subsequent to the commencement of any
proceeding against or with respect to Company under any chapter of the
Bankruptcy Code of 1978, 11 U.S.C. Section 101 et seq.), premium, fees,
commissions, expenses or otherwise (such obligations being the "Obligations"),
and agrees to pay any and all


<PAGE>   25


reasonable expenses (including reasonable counsel fees and expenses) incurred in
enforcement or collection of all or any part thereof, whether such obligations,
indebtedness and liabilities are direct, indirect, fixed, contingent, joint,
several or joint and several, and any Rights under this Guaranty. The liability
of each Guarantor hereunder with respect to the Obligations shall not exceed at
any time the Maximum Amount (as hereinafter defined) less the sum of the
amounts, if any, collected by or on behalf of the Guarantied Parties from such
Guarantor pursuant to any other Loan Papers. "Maximum Amount" means the maximum
amount of liability that can be incurred by a Guarantor without rendering this
Guaranty, as it relates to such Guarantor, voidable under applicable law
relating to fraudulent conveyance, fraudulent transfer, and not for any greater
amount.

         B. Guaranty Absolute. Guarantors, jointly and severally, guarantee that
the Obligations will be paid strictly in accordance with the terms of the Loan
Agreement, the Notes, and the other Loan Papers, regardless of any Law,
regulation or order now or hereafter in effect in any jurisdiction affecting any
of such terms or the Rights of any Guarantied Party with respect thereto;
provided, however, nothing contained in this Guaranty shall require Guarantors
to make any payment under this Guaranty in violation of any Law, regulation or
order now or hereafter in effect. The obligations and liabilities of each
Guarantor hereunder are independent of the obligations of Company under the Loan
Papers and any Laws. The liability of each Guarantor under this Guaranty shall
be absolute and unconditional irrespective of:

         1. any increase, reduction or payment in full at any time or from time
to time of any part of the Obligations;

         2. any lack of validity or enforceability of the Loan Agreement, the
Notes or any other Loan Paper or other agreement or instrument relating thereto;

         3. any insolvency, bankruptcy, reorganization, receivership or other
proceeding under any Debtor Relief Laws involving the Company, any Guarantor,
any Obligor or any other Person obligated on any of the Obligations;

         4. any renewal, compromise, extension, acceleration or other change in
the time, manner or place of payment of, or in any other term of, all or any of
the Obligations, or any other amendment or waiver of or any consent to departure
from the Loan Agreement, the Notes or any other Loan Paper and other agreement
or instrument relating thereto;

         5. any exchange, release, sale or non-perfection of any collateral or
Lien therein or any lack of validity or enforceability or change in priority,
destruction, reduction, or loss or impairment of value of any collateral or Lien
therein;

         6. any release or amendment or waiver of or consent to departure from
any other guaranty for all or any of the Obligations; or

         7. any other circumstance which might otherwise constitute a defense
available to, or a discharge of, Company, any Guarantor, any other guarantor,
any Obligor or other Person liable on


                                      - 2 -

<PAGE>   26


the Obligations, including without limitation any defense by reason of any
disability or other defense of the Company, or the cessation from any cause
whatsoever of the liability of Company, or any claim that Guarantors'
obligations hereunder exceed or are more burdensome than those of Company or any
other Obligor.

This Guaranty shall continue to be effective or be reinstated, as the case may
be, if at any time any payment of any of the Obligations is rescinded or must
otherwise be returned by any Guarantied Party or any other Person upon the
insolvency, bankruptcy or reorganization of Company, any Guarantor, any Obligor
or otherwise, all as though such payment had not been made.

         C. Waiver. Each Guarantor hereby waives: (a) promptness, protests,
diligence, presentments, acceptance, performance, demands for performance,
notices of nonperformance, notices of protests, notices of dishonor, notices of
acceptance of this Guaranty and of the existence, creation or incurrence of new
or additional indebtedness, and any of the events described in Section 2 and of
any other occurrence or matter with respect to any of the Obligations, this
Guaranty or any of the other Loan Papers; (b) any requirement that any
Guarantied Party protect, secure, perfect or insure any Lien or security
interest or any property subject thereto or exhaust any Right or take any action
against Company, any Obligor or any other Person or any collateral or pursue any
other remedy in any Guarantied Party's power whatsoever; (c) any Right to assert
against any Guarantied Party as a counterclaim, set-off or cross-claim, any
counterclaim, set-off or claim which it may now or hereafter have against
Company, any Obligor or other Person liable on the Obligations; (d) any Right to
seek or enforce any remedy or Right that any Guarantied Party now has or may
hereafter have against Company (to the extent permitted by Laws) or any other
Obligor; and (e) any Right to participate in any collateral or any Right
benefitting the Guarantied Parties in respect of the Obligations.

         D. Subrogation and Subordination.

         (a) Notwithstanding any reference to subrogation contained herein to
the contrary, each Guarantor hereby irrevocably waives any claim or other Rights
which it may have or hereafter acquire against Company, any Obligor or any other
guarantor that arise from the existence, payment, performance or enforcement of
such Guarantor's obligations under this Guaranty, including, without limitation,
any Right of subrogation, reimbursement, exoneration, contribution,
indemnification, any Right to participate in any claim or remedy of any
Guarantied Party against Company, any Obligor or any guarantor or any collateral
which any Guarantied Party now has or hereafter acquires, whether or not such
claim, remedy or Right arises in equity, or under contract or Laws, including
without limitation, the Right to take or receive from Company or any Obligor,
directly or indirectly, in cash or other property or by set-off or in any other
manner, payment or security on account of such claim or other Rights. If any
amount shall be paid or any Guarantor in violation of the preceding sentence and
the Obligations shall not have been paid in full, such amount shall be deemed to
have been paid to such Guarantor for the benefit of, and held in trust for the
benefit of, the Guarantied Parties and shall forthwith be paid to Administrative
Lender to be credited and applied upon the Obligations, whether matured or
unmatured, in accordance with the terms of the Loan Agreement. Each Guarantor
acknowledges that it will receive direct and indirect benefits from the
financing


                                      - 3 -

<PAGE>   27


arrangements contemplated by the Loan Agreement and the other Loan Papers and
that the waiver set forth in this Paragraph D(a) is knowingly made in
contemplation of such benefits.

         (b) All debt and other liabilities of Company to any Guarantor
("Company Debt") are expressly subordinate and junior to the Obligations and any
instruments evidencing the Company Debt shall contain provisions acceptable to
Determining Lenders providing for such subordination (such provisions to be in
substantially the form of and not more favorable to such Guarantor than the
provisions specified in the Loan Agreement) and shall be binding on all holders
of such Company Debt. If the instrument evidencing the Company Debt does not
contain such provisions as may be acceptable to Determining Lenders
(notwithstanding the obligation of each Guarantor to assure that such provisions
are contained in any such instrument) or if such Company Debt is not evidenced
by any instrument or other document, then the provisions specified in the Loan
Agreement shall be incorporated therein by reference and such Company Debt shall
be subject thereto.

         E. Representations and Warranties. Each Guarantor, jointly and
severally, hereby represents and warrants that each of the provisions of Article
6 of the Loan Agreement (each of which is hereby incorporated by reference) is
true and correct.

         F. Covenants. Each Guarantor, jointly and severally, covenants and
agrees that, so long as any part of the Obligations shall remain unpaid or any
Guarantied Party shall have any commitment under the Loan Agreement or any other
Loan Paper, each Guarantor will, unless the Guarantied Parties or Determining
Lenders shall otherwise consent in writing (which of the Guarantied Parties or
Determining Lenders shall be required to so consent to be determined in
accordance with the Loan Agreement), comply, to the extent applicable to it, and
cause the other Guarantors to comply, with the terms of the Loan Agreement and
the other Loan Papers.

         G. Amendments, Etc. No amendment or waiver of any provision of this
Guaranty nor consent to any departure by any Guarantor therefrom shall in any
event be effective unless the same shall be in writing and signed by the
Guarantied Parties or Determining Lenders (which of the Guarantied Parties or
Determining Lenders shall be required to so consent to be determined in
accordance with the Loan Agreement) and then such waiver or consent shall be
effective only in the specific instance and for the specific purpose for which
given.

         H. Addresses for Notices. Unless otherwise provided herein, all
notices, requests, consents and demands shall be in writing and shall be
delivered by hand or overnight courier service, mailed or sent by telecopy to
the respective addresses specified in the Loan Agreement (if to Administrative
Lender or any Lender) or on the signature pages hereof (if to a Guarantor), or,
as to any party, to such other addresses as may be designated by it in written
notice to all other parties. All notices, requests, consents and demands
hereunder shall be deemed to have been given on the date of receipt if delivered
by hand or overnight courier service or sent by telecopy, or if mailed,
effective on the earlier of actual receipt or three days after being mailed by
certified mail, return receipt requested, postage prepaid, addressed as
aforesaid.


                                      - 4 -

<PAGE>   28




         I. No Waiver; Remedies. No failure on the part of any Guarantied Party
to exercise, and no delay in exercising, any Right hereunder or under any of the
Loan Papers shall operate as a waiver thereof; nor shall any single or partial
exercise of any Right hereunder or under any of the Loan Papers preclude any
other or further exercise thereof or the exercise of any other Right. No
Guarantied Party shall be required to (a) prosecute collection or seek to
enforce or resort to any remedies against Company or any other Person liable on
any of the Obligations, (b) join Company or any other Obligor liable on any of
the Obligations in any action in which any Guarantied Party prosecutes
collection or seeks to enforce or resort to any remedies against Company or
other Obligor liable on any of the Obligations, or (c) seek to enforce or resort
to any remedies with respect to any Liens granted to (or benefitting, directly
or indirectly) any Guarantied Party by Company or any other Obligor liable on
any of the Obligations. No Guarantied Party shall have any obligation to
protect, secure or insure any of the Liens or the properties or interests in
properties subject thereto. The remedies herein provided are cumulative and not
exclusive of any remedies provided by Law.

         J. Right of Set-off. Upon the occurrence and during the continuance of
any Event of Default, or upon the breach of any Guarantor's obligations
hereunder, each Guarantied Party (and each of their Participants) are hereby
authorized at any time and from time to time, to the fullest extent permitted by
Law, to set off and apply any and all deposits (general or special, time or
demand, provisional or final) at any time held and other indebtedness at any
time owing by such Guarantied Party (and each of their Participants) to or for
the credit or the account of any Guarantor against any and all of the
obligations of any Guarantor now or hereafter existing under this Guaranty,
irrespective of whether or not such Guarantied Party shall have made any demand
under this Guaranty and although such obligations may be contingent and
unmatured. Each Guarantied Party agrees to promptly notify such Guarantor after
any such set-off by them and application, provided that the failure to give such
notice shall not affect the validity of such set-off and application. The Rights
of each Guarantied Party (and each of their Participants) under this Section 10
are in addition to other Rights and remedies (including, without limitation,
other Rights of set-off) which each Guarantied Party (and each of their
Participants) may have.

         K. Liens. Each Guarantor agrees that each Guarantied Party, in its
discretion, without notice or demand and without affecting either the liability
of such Guarantor, Company or any Obligor, or the Liens and security interests
created by, this Guaranty, or any security interest or other Lien, may foreclose
any deed of trust or mortgage or similar Lien it may hold covering interests in
real or personal property, and the interests in real or personal property
secured thereby, by non- judicial sale; and such Guarantor hereby waives any
defense to the recovery by any Guarantied Party hereunder against Company, such
Guarantor or any collateral of any deficiency after a non-judicial sale and such
Guarantor expressly waives any defense or benefits that may be derived from
Chapter 34 of the Texas Business and Commerce Code, Section 51.003 of the Texas
Property Code, or any similar statute in effect in any other jurisdiction.
Without limiting the foregoing, each Guarantor waives any defense arising out of
any such non-judicial sale even though such sale operates to impair or
extinguish any Right of reimbursement or subrogation or any other Right or
remedy of such Guarantor against Company or any other Person or any Collateral
or any other collateral. Each Guarantor hereby agrees that such Guarantor shall
be liable, subject to the limitations of Section 1 hereof, for any part of the
Obligations remaining unpaid after any foreclosure.


                                      - 5 -

<PAGE>   29


         L. Continuing Guaranty; Transfer of Notes. This Guaranty is an
irrevocable continuing guaranty of payment and shall (a) remain in full force
and effect until final payment in full (after the Termination Date), of the
Obligations and all other amounts payable under this Guaranty, (b) be binding
upon each Guarantor, its successors and assigns, and (c) inure to the benefit of
and be enforceable by each Guarantied Party and its successors, transferees and
assigns. Without limiting the generality of the foregoing clause (c), each
Guarantied Party may assign or otherwise transfer its Rights under the Loan
Agreement, the Notes or any of the Loan Papers or any interest therein to any
other Person, and such other Person shall thereupon become vested with all the
Rights or any interest therein, as appropriate, in respect thereof granted to
such Guarantied Party herein or otherwise.

         M. Information. Each Guarantor acknowledges and agrees that it shall
have the sole responsibility for obtaining from Company such information
concerning Company's financial condition or business operations as such
Guarantor may require, and that none of Administrative Lender, any Lender or
Issuer has any duty at any time to disclose to any Guarantor any information
relating to the business operations or financial conditions of the Company.

         N. Governing Law. This Guaranty shall be governed by, and construed in
accordance with, the Laws of the State of Texas.

         O. Ratable Benefit. This Guaranty is for the ratable benefit of each
Guarantied Party, each of which shall share any proceeds of this Guaranty
pursuant to the terms of Section 2.11(d) of the Loan Agreement.

         P. Guarantor Insolvency. Should any Guarantor become insolvent, fail to
pay its debts generally as they become due, voluntarily seek, consent to, or
acquiesce in the benefits of any Debtor Relief Law or become a party to or be
made the subject of any proceeding provided for by any Debtor Relief Law (other
than as a creditor or claimant) that could suspend or otherwise adversely affect
the rights of any Guarantied Party granted hereunder, then, the obligations of
such Guarantor under this Guaranty shall be, as between such Guarantor and such
Guarantied Party, a fully-matured, due, and payable obligation of such Guarantor
to such Guarantied Party (without regard to whether Company is then in default
under the Loan Agreement or any other Loan Paper or whether any part of the
Obligations is then due and owing by Company to such Guarantied Party), payable
in full by such Guarantor to such Guarantied Party upon demand, which shall be
the estimated amount owing in respect of the contingent claim created hereunder.


                                      - 6 -

<PAGE>   30



         IN WITNESS WHEREOF, Guarantors have caused this Guaranty to be duly
executed and delivered by their respective officers or representatives thereunto
duly authorized as of the date first above written.

                                       ELK CORPORATION OF DALLAS
                                       ELK CORPORATION OF TEXAS
                                       ELK CORPORATION OF AMERICA
                                       ELK CORPORATION OF ARKANSAS
                                       ELK CORPORATION OF ALABAMA



                                       By:
                                           -------------------------------------
                                           Richard J. Rosebery
                                           Vice President for all
Address for Guarantors:
c/o Elcor Corporation
14643 Dallas Parkway, Suite 1000
Dallas, Texas 75240-8871


                                       OEL, LTD.
                                       CHROMIUM CORPORATION



                                       By:
                                           -------------------------------------
                                           Richard J. Rosebery
                                           Chairman of the Board for both


                                       NELPA, INC.



                                       By:
                                           -------------------------------------
                                           Monte L. Miller
                                           President


                                      - 7 -

<PAGE>   31



                                     ELCOR SERVICE LIMITED PARTNERSHIP

                                     By:  ELCOR MANAGEMENT CORPORATION,
                                          Its General Partner



                                     By:
                                         -------------------------------------
                                         Richard J. Rosebery
                                         Vice Chairman, Chief Financial and
                                         Administrative Officer and Treasurer


                                     ELCOR MANAGEMENT CORPORATION



                                     By:
                                         -------------------------------------
                                         Richard J. Rosebery
                                         Vice Chairman, Chief Financial and
                                         Administrative Officer and Treasurer


                                     CYBERSHIELD OF GEORGIA, INC.
                                     CYBERSHIELD, INC.
                                     CYBERSHIELD INTERNATIONAL, INC.
                                     CYBERSHIELD OF TEXAS, INC. (formerly known
                                     as Chromium Corporation)



                                     By:
                                         -------------------------------------
                                         Richard J. Rosebery
                                         Chairman and Chief Executive Officer


                                      - 8 -

<PAGE>   32


                                    EXHIBIT C

                                 PROMISSORY NOTE

$50,000,000.00                                            Dated: January 5, 2000

         FOR VALUE RECEIVED, the undersigned, ELCOR CORPORATION, a Delaware
corporation ("Company"), hereby promises to pay to the order of BANK OF AMERICA,
N.A. ("Lender") the principal amount of each Advance made by Lender to Company
pursuant to the Loan Agreement (as hereinafter defined). All Advances remaining
unpaid shall be repaid in full on the Termination Date. Company promises to pay
interest on the unpaid principal balance of each Advance from the date of such
Advance until said principal amount is paid in full, at the times and at the
rate or rates as specified in the Loan Agreement.

         Both principal and interest are payable in lawful money of the United
States of America to Bank of America, N.A., as Administrative Lender, at 901
Main Street, Dallas, Texas 75202, in immediately available funds. Each Advance
made by Lender to Company pursuant to the Loan Agreement and all payments made
on account of principal hereof shall be recorded by Lender and, prior to any
transfer hereof, endorsed on the grid attached hereto which is part of this
Note; provided, however, failure to make any such recordation or endorsement
shall not affect the obligations of Company hereunder or under the Loan
Agreement.

         This Note is one of the Notes referred to in, and is entitled to the
benefits of and obligations pertaining to, the Loan Agreement dated as of
September 29, 1993 (said Loan Agreement, as amended, modified or supplemented
from time to time, the "Loan Agreement") among Company, Lender, certain other
Lenders, and Bank of America, N.A., as Administrative Lender, and this Note is a
substitution for (but is not an extinguishment or novation of any indebtedness
in respect of) that certain (a) Note of Company payable to the order of
NationsBank of Texas, N.A. (now known as Bank of America, N.A., successor by
merger to NationsBank, N.A.), dated December 15, 1997, in the principal amount
of $40,000,000.00 and (b) Note of Company payable to the order of Bank of
America Texas, N.A. (now known as Bank of America, N.A.), dated January 29,
1999, in the original principal amount of $10,000,000.00.

         The Loan Agreement, among other things, (i) provides for the making of
Advances by Lender to Company from time to time in an aggregate amount not to
exceed at any time outstanding the U.S. dollar amount first above mentioned, the
indebtedness of Company resulting from each such Advance being evidenced by this
Note, and (ii) contains provisions for acceleration of the maturity hereof upon
the happening of certain stated events and also for prepayments on account of
principal hereof prior to the maturity hereof upon the terms and conditions
therein specified. All terms not expressly defined herein shall have the same
definitions as set forth in the Loan Agreement.

                                     ELCOR CORPORATION


                                     By:
                                        --------------------------------------
                                        Richard J. Rosebery
                                        Vice Chairman, Chief Financial and
                                        Administrative Officer and Treasurer



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<FISCAL-YEAR-END>                          DEC-31-1999
<PERIOD-END>                               DEC-31-1999
<CASH>                                           3,270
<SECURITIES>                                         0
<RECEIVABLES>                                   52,282
<ALLOWANCES>                                     1,023
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