TREX CO INC
10-Q, 1999-05-17
PLASTICS PRODUCTS, NEC
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<PAGE>
 
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                   FORM 10-Q

[x]    QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES
       EXCHANGE ACT OF 1934

For the quarterly period ended March 31, 1999
                                       OR

[_]    TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES
EXCHANGE ACT OF 1934

For the transition period from _____________________ to _____________________

                        Commission File Number:  001-14649

                               Trex Company, Inc.

              (Exact name of registrant as specified in its charter)

<TABLE>
<S>                                          <C> 
           Delaware                              54-1910453

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

20 South Cameron Street
Winchester, Virginia                         22601

(Address of principal executive offices)     (Zip Code)
</TABLE> 

Registrant's telephone number, including area code:  (540) 678-4070

                                Not Applicable
                                --------------
             (Former name, former address and former fiscal year,
                         if changed since last report)

     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  [_]                       No  [x]

     The number of shares of the registrant's common stock, par value $.01
     per share, outstanding at May 14, 1999 was 14,115,450 shares.
     
<PAGE>
                              TREX COMPANY, INC.

                                     INDEX

<TABLE>
<CAPTION>

                                                                                           Page
<S>      <C>                                                                               <C>
PART I.  FINANCIAL INFORMATION                                                             

         Item 1.        Financial Statements

                        Trex Company, Inc. (Registrant)
                        ------------------------------

                        Balance Sheets as of December 31, 1998
                          and March 31, 1999 (unaudited)                                     3
                  
                        Notes to Balance Sheets                                              4
                  
                        TREX Company, LLC (Predecessor)
                        ------------------------------

                        Consolidated Balance Sheets as of December 31, 1998
                          and March 31, 1999 (unaudited)                                     6
                  
                        Consolidated Statements of Operations for the three months
                          ended March 31, 1998 and 1999 (unaudited)                          7
                  
                        Consolidated Statements of Cash Flows for the three months
                          ended March 31, 1998 and 1999 (unaudited)                          8
             
                        Notes to Consolidated Financial Statements                           9

         Item 2.        Management's Discussion and Analysis of
                          Financial Condition and Results of Operations                     14
 
         Item 3.        Quantitative and Qualitative Disclosures                            18
                          About Market Risk
 
PART II. OTHER INFORMATION
 
         Item 2.        Changes in Securities and Use of Proceeds                           18
 
         Item 4.        Submission of Matters to a Vote of Security Holders                 19
 
         Item 6.        Exhibits and Reports on Form 8-K                                    20

         Signatures                                                                         21

         Exhibit Index
</TABLE>
                                      -2-
<PAGE>
 
                        Part I.   FINANCIAL INFORMATION
                                        

Item 1.  Financial Statements

                              TREX COMPANY, INC.

                                Balance Sheets

<TABLE>
<CAPTION>
                                                                                     December 31,       March 31,
                                                                                        1998*             1999
                                                                                     -----------       -----------
                                                                                                       (unaudited)
<S>                                                                                 <C>            <C>
Assets
     Cash.........................................................................      $1,000            $1,000
                                                                                        ------            ------  
Total assets......................................................................      $1,000            $1,000
                                                                                        ======            ======

Stockholder's equity
Preferred stock, $0.01 par value, 3,000,000 shares authorized, none issued and
outstanding.......................................................................      $   --            $   --
 Common stock, $0.01 par value, 40,000,000 shares authorized, 100 shares  issued
  issued and outstanding..........................................................           1                 1
 Additional capital...............................................................         999               999
 Retained earnings................................................................          --                --
                                                                                        ------            ------
Total stockholder's equity........................................................      $1,000            $1,000
                                                                                        ======            ======
</TABLE>


*  The balance sheet at December 31, 1998 has been derived from the audited
financial statements at that date, but does not include all of the information
and footnotes required by generally accepted accounting principles for complete
financial statements.

                   SEE ACCOMPANYING NOTES TO BALANCE SHEETS.

                                      -3-
<PAGE>
 
                               TREX COMPANY, INC

                            Notes to Balance Sheets
                     December 31, 1998 and March 31, 1999


1.   BUSINESS AND ORGANIZATION

Trex Company, Inc. (the "Company"), a Delaware corporation, was incorporated
on September 4, 1998 for the purpose of acquiring 100% of the membership
interests and operating the business of TREX Company, LLC, a Delaware
limited liability company, in connection with an initial public offering
("IPO") of the Company's common stock.  The IPO was consummated on April 13,
1999.  On March 22, 1999, the Company amended its certificate of incorporation
to increase its authorized capital to 40,000,000 shares of common stock (the
"Common Stock") and 3,000,000 shares of preferred stock. All references in the
accompanying balance sheets have been restated to reflect the increase in the
Company's authorized capital.

Reorganization

Trex Company, Inc., TREX Company, LLC and the holders of membership interests in
TREX Company, LLC completed certain transactions (the "Reorganization") on 
April 7, 1999, prior to the consummation of the IPO.  In the Reorganization, 
the junior members of TREX Company, LLC contributed their membership interests 
to Trex Company, Inc. in exchange for 9,500,000 shares of Common Stock of Trex 
Company, Inc.  Concurrently with such exchange, the preferred member of TREX 
Company, LLC exchanged its preferred membership interest for a $3.1 million 
note of Trex Company, Inc.  As a result of such exchanges, TREX Company, LLC 
became a wholly owned subsidiary of Trex Company, Inc.  The Company has 
accounted for the Reorganization as an exchange of shares between entities 
under common control at historical cost in a manner similar to a pooling of 
interests.  After the Reorganization, the ownership percentage of each Trex 
Company, Inc. common stockholder was the same as its ownership percentage in 
the junior membership interests of TREX Company, LLC.

As part of the Reorganization, the Company made a special cash distribution (the
"LLC Distribution") to its junior members in the amount of $12.6 million, of
which $6.7 million was paid prior to the consummation of the IPO.  A deferred
income tax liability of $2.6 million was recognized as a result of the
conversion of TREX Company, LLC in the Reorganization from a partnership for
federal income tax purposes to a corporation taxed in accordance with Subchapter
C of the Internal Revenue Code.

Immediately prior to the Reorganization, TREX Company, LLC exercised an option
to repurchase 667 units of junior membership interest from certain members at 
a price of $.01 per unit.

Initial Public Offering

In the IPO, the Company sold 4,615,450 shares of Common Stock at a public
offering price of $10.00 per share. Of such shares, the Company sold 4,000,000
shares on April 13, 1999 and 615,450 shares on May 6, 1999 pursuant to the
underwriters' exercise in full of their over-allotment option. The net proceeds
from the IPO, after deducting underwriting discounts and commissions and
offering expenses payable by the Company, totaled approximately $41.2 million.
The net proceeds of approximately $35.5 million from the sale of shares on April
13, 1999 were used as follows: approximately $28.1 million was used to repay
approximately $26.3 million of senior and subordinated notes, accrued interest
thereon and a related prepayment premium of approximately $1.5 million;
approximately $3.1 million was used to repay the note issued to the preferred
member of TREX Company, LLC in the Reorganization; and approximately $4.3
million was used to fund a portion of the LLC Distribution. The net proceeds of
approximately $5.7 million from the over-allotment exercise were used as
follows: approximately $4.4 million was used to repay borrowings under the
Company's revolving credit facility and approximately $1.3 million has been
temporarily invested pending application for working capital and general
corporate purposes.

                                      -4-
<PAGE>
 

2.  BASIS OF PRESENTATION

The accompanying unaudited financial statements have been prepared in accordance
with generally accepted accounting principles for interim financial information
and the instructions to Form 10-Q and Article 10 of Regulation S-X.
Accordingly, the accompanying financial statements do not include all of the
information and footnotes required by generally accepted accounting principles
for complete financial statements. In the opinion of management, all adjustments
(consisting of normally recurring accruals, except as described below)
considered necessary for a fair presentation have been included in the
accompanying financial statements.  These financial statements should be read in
conjunction with the Company's audited financial statements as of December 31,
1998 included in the Company's registration statement on Form S-1 (File No. 333-
63287), as filed with the Securities and Exchange Commission.

The Company had no operations or activity from inception on September 4, 1998
through April 7, 1999, immediately prior to the Reorganization.

3.   STOCKHOLDER'S EQUITY

Subsequent to March 31, 1999, the Company granted certain employees stock
options to acquire a total of 105,050 shares of the Company's Common Stock at an
exercise price of $10.00 per share and its two non-employee directors stock
options to acquire a total of 3,000 shares of Common Stock at an exercise price
of $13.75 per share.  Each option vests with respect to 25% of the shares
subject to the option on each of the first, second, third and fourth
anniversaries of the date of grant.  The options are forfeitable upon
termination of an option holder's service as an employee or director under
certain circumstances.

4.   PRO FORMA DATA (Unaudited)

The unaudited consolidated financial statements and related notes of TREX
Company, LLC included elsewhere in this report set forth the pro forma
consolidated statements of operations data on the face of TREX Company, LLC's
Consolidated Statements of Operations and the pro forma consolidated balance
sheet data, supplemental pro forma consolidated balance sheet data and
supplemental pro forma consolidated statements of operations data in Note 7 to
such financial statements. The pro forma financial information gives effect to
the Reorganization and the supplemental pro forma financial information gives
effect to the Reorganization and the IPO.

                                      -5-
<PAGE>
 
                               TREX COMPANY, LLC

                          Consolidated Balance Sheets

<TABLE>
<CAPTION>
 
                                                                         December 31,     March 31,
                                                                         -----------     -----------
                                                                            1998*           1999
                                                                         -----------     -----------
                                                                                        (unaudited)
<S>                                                                 <C>                <C>
ASSETS                                                                                  
Current assets:
  Cash and cash equivalents........................................      $ 1,200,000     $ 3,439,000
  Trade accounts receivable........................................           34,000       4,746,000
  Inventories......................................................        6,007,000       3,111,000
  Prepaid expenses and other assets................................          673,000       1,065,000
                                                                         -----------     -----------
Total current assets...............................................        7,914,000      12,361,000
                                                                         -----------     -----------

Property, plant and equipment, net.................................       33,886,000      41,118,000
Intangible assets, net.............................................        9,298,000       9,089,000
Deferred financing charges, net....................................          233,000         221,000
                                                                         -----------     -----------
Total assets.......................................................      $51,331,000     $62,789,000
                                                                         ===========     ===========

LIABILITIES AND MEMBERS' EQUITY
Current liabilities:
  Trade accounts payable...........................................      $ 2,577,000     $ 6,007,000
  Accrued expenses.................................................        1,086,000         971,000
  Other current liabilities........................................        1,314,000         734,000
  Current portion of long-term debt................................        6,109,000       7,599,000
                                                                         -----------     -----------
Total current liabilities..........................................       11,086,000      15,311,000
Long term debt.....................................................       26,954,000      26,905,000
                                                                         -----------     -----------
Total liabilities..................................................       38,040,000      42,216,000
                                                                         -----------     -----------

Members' equity:
  Preferred units, 1,000 units authorized, issued and
    outstanding....................................................        3,000,000       3,000,000
  Junior units, 4,000 units authorized, issued and
    outstanding....................................................        2,350,000       2,350,000
  Undistributed income.............................................        7,941,000      15,223,000
                                                                         -----------     -----------
Total members' equity..............................................       13,291,000      20,573,000
                                                                         -----------     -----------
Total liabilities and members' equity..............................      $51,331,000     $62,789,000
                                                                         ===========     ===========
</TABLE>

*  The consolidated balance sheet at December 31, 1998 has been derived from 
the audited financial statements at that date, but does not include all of the 
information and footnotes required by generally accepted accounting principles 
for complete financial statements.

         SEE ACCOMPANYING NOTES TO CONSOLIDATED FINANCIAL STATEMENTS.

                                      -6-
<PAGE>
 
                               TREX COMPANY, LLC

                     Consolidated Statements of Operations
                                  (Unaudited)

<TABLE>
<CAPTION>
 
                                                                           Three Months Ended March 31,
                                                                         --------------------------------
                                                                              1998             1999
                                                                         ---------------  ---------------
<S>                                                                      <C>              <C>
Net sales..............................................................     $15,525,000      $22,365,000
Cost of sales..........................................................       7,378,000        9,942,000
                                                                            -----------      -----------
Gross profit...........................................................       8,147,000       12,423,000
Selling, general, and administrative expenses..........................       2,414,000        4,065,000
                                                                            -----------      -----------
Income from operations.................................................       5,733,000        8,358,000
Interest income........................................................          34,000           19,000
Interest (expense).....................................................        (693,000)        (819,000)
                                                                            -----------      -----------
Net income.............................................................     $ 5,074,000      $ 7,558,000
                                                                            ===========      ===========

Basic earnings per junior unit.........................................       $1,243.25        $1,864.25
                                                                            ===========      ===========

Weighted average junior units outstanding..............................           4,000            4,000
                                                                            ===========      ===========

Pro forma data (unaudited, see Note 7):
  Historical net income................................................     $ 5,074,000      $ 7,558,000
  Pro forma income taxes...............................................      (2,030,000)      (3,023,000)
                                                                            -----------      -----------
  Pro forma net income.................................................     $ 3,044,000      $ 4,535,000
                                                                            ===========      ===========
  Pro forma income per share, basic....................................           $0.32            $0.48
                                                                            ===========      ===========
  Pro forma weighted average shares outstanding........................       9,500,000        9,500,000
                                                                            ===========      ===========
</TABLE>

         SEE ACCOMPANYING NOTES TO CONSOLIDATED FINANCIAL STATEMENTS.

                                      -7-
<PAGE>
 
                               TREX COMPANY, LLC

                     Consolidated Statements of Cash Flows
                                  (Unaudited)

<TABLE>
<CAPTION>
 
                                                                           Three Months Ended March 31,
                                                                        ----------------------------------
                                                                             1998              1999
                                                                        ---------------  -----------------
<S>                                                                     <C>              <C>
OPERATING ACTIVITIES
Net income........................................................         $ 5,074,000        $ 7,558,000
Adjustments to reconcile net income to net cash
 provided by operating activities
  Depreciation and amortization...................................             724,000            933,000
  Amortization of deferred financing charges......................              13,000             12,000
  Loss on disposal of property, plant and
    equipment.....................................................                  --            151,000
  Changes in operating assets and liabilities
     Trade accounts receivable....................................          (1,582,000)        (4,712,000)
     Inventories..................................................           2,568,000          2,896,000
     Prepaid expenses and other assets............................             (23,000)          (392,000)
     Trade accounts payable.......................................             523,000          3,430,000
     Accrued expenses.............................................             (13,000)          (115,000)
     Other current liabilities....................................            (554,000)          (580,000)
                                                                           -----------        -----------
Net cash provided by operating activities.........................           6,730,000          9,181,000
                                                                           -----------        -----------

INVESTING ACTIVITIES
Expenditures for property, plant and equipment....................            (386,000)        (8,107,000)
                                                                           -----------        -----------
Net cash used in investing activities.............................            (386,000)        (8,107,000)
                                                                           -----------        -----------

FINANCING ACTIVITIES
Borrowings under mortgages and notes..............................                  --          1,487,000
Principal payments under mortgages and notes......................                  --            (46,000)
Preferred distributions paid......................................            (101,000)          (101,000)
Tax distributions paid............................................             (69,000)          (175,000)
                                                                           -----------        -----------
Net cash (used in) provided by financing activities...............            (170,000)         1,165,000
                                                                           -----------        -----------
Net increase in cash and cash
 equivalents......................................................           6,174,000          2,239,000
Cash and cash equivalents at beginning of period..................           2,000,000          1,200,000
                                                                           -----------        -----------
Cash and cash equivalents at end of period........................         $ 8,174,000        $ 3,439,000
                                                                           ===========        ===========
</TABLE>

         SEE ACCOMPANYING NOTES TO CONSOLIDATED FINANCIAL STATEMENTS.

                                      -8-
<PAGE>
 
                               TREX COMPANY, LLC

                  Notes to Consolidated Financial Statements
        For The Three Months Ended March 31, 1998 and 1999 (Unaudited)


1.   BUSINESS AND ORGANIZATION

TREX Company, LLC (the "Company") manufactures and distributes wood/plastic
composite products primarily for residential and commercial decking
applications. Trex Wood-Polymer(TM) lumber is manufactured in a proprietary
process that combines waste wood fibers and reclaimed polyethylene.

Organization

The Company is a limited liability company formed under the laws of the State of
Delaware on July 1, 1996 (inception).  The Company initiated commercial activity
on August 29, 1996.

On August 29, 1996, the Company acquired substantially all of the assets and
assumed certain liabilities of the Composite Products Division of Mobil Oil
Corporation for a cash purchase price of approximately $29.5 million.  The
acquisition was accounted for using the purchase accounting method.

On September 4, 1998, the Company formed a wholly owned subsidiary, Trex
Company, Inc., for the purpose of acquiring 100% of the membership interests and
operating the business of the Company in connection with the subsidiary's
initial public offering (the "IPO") of common stock (the "Common Stock").  The
IPO was consummated on April 13, 1999. As of December 31, 1998 and March 31,
1999, the Company had capitalized its subsidiary with an initial capital
contribution of $1,000 and the subsidiary had no other assets or operations as
of those dates or for the periods then ended. The Company has reflected its
investment in its subsidiary as a component of other assets as of December 31,
1998 and March 31, 1999.

Reorganization

Trex Company, Inc., TREX Company, LLC and the holders of membership interests in
TREX Company, LLC completed certain transactions (the "Reorganization") on 
April 7, 1999, prior to the consummation of the IPO.  In the Reorganization, 
the junior members of TREX Company, LLC contributed their membership interests 
(or "units") to Trex Company, Inc. in exchange for 9,500,000 shares of Common 
Stock of Trex Company, Inc.  Concurrently with such exchange, the preferred 
member of TREX Company, LLC exchanged its preferred membership interest for a 
$3.1 million note of Trex Company, Inc.  As a result of such exchanges, TREX 
Company, LLC became a wholly owned subsidiary of Trex Company, Inc.  The 
Company has accounted for the Reorganization as an exchange of shares between 
entities under common control at historical cost in a manner similar to a 
pooling of interests.  After the Reorganization, the ownership percentage of 
each Trex Company, Inc. common stockholder was the same as its ownership 
percentage in the junior membership interests of TREX Company, LLC.

As part of the Reorganization, the Company made a special cash distribution (the
"LLC Distribution") to its junior members in the amount of $12.6 million, of
which $6.7 million was paid prior to the consummation of the IPO.  A deferred
income tax liability of $2.6 million was recognized as a result of the
conversion of TREX Company, LLC in the Reorganization from a partnership for
federal income tax purposes to a corporation taxed in accordance with Subchapter
C of the Internal Revenue Code (a "C corporation").

Immediately prior to the Reorganization, TREX Company, LLC exercised an option
to repurchase 667 units of junior membership interest from certain members at 
a price of $.01 per unit.

                                      -9-
<PAGE>
 
Initial Public Offering

In the IPO, Trex Company, Inc. sold 4,615,450 shares of Common Stock at a public
offering price of $10.00 per share. Of such shares, Trex Company, Inc. sold
4,000,000 shares on April 13, 1999 and 615,450 shares on May 6, 1999 pursuant to
the underwriters' exercise in full of their over-allotment option. The net
proceeds from the IPO, after deducting underwriting discounts and commissions
and offering expenses payable by Trex Company, Inc., totaled approximately $41.2
million. The net proceeds of approximately $35.5 million from the sale of shares
on April 13, 1999 were used as follows: approximately $28.1 million was used to
repay approximately $26.3 million of senior and subordinated notes, accrued
interest thereon and a related prepayment premium of approximately $1.5 million;
approximately $3.1 million was used to repay the note issued to the preferred
member of TREX Company, LLC in the Reorganization; and approximately $4.3
million was used to fund a portion of the LLC Distribution. The net proceeds of
approximately $5.7 million from the over-allotment exercise were used as
follows: approximately $4.4 million was used to repay borrowings under the
Company's revolving credit facility and approximately $1.3 million has been
temporarily invested pending application for working capital and general
corporate purposes.

2.  Basis of Presentation

The accompanying unaudited consolidated financial statements have been prepared
in accordance with generally accepted accounting principles for interim
financial information and the instructions to Form 10-Q and Article 10 of
Regulation S-X. Accordingly, the accompanying consolidated financial statements
do not include all of the information and footnotes required by generally
accepted accounting principles for complete financial statements. In the opinion
of management, all adjustments (consisting of normally recurring accruals,
except as described below) considered necessary for a fair presentation have
been included in the accompanying consolidated financial statements. The
consolidated results of operations for the three-month period ended March 31,
1999 are not necessarily indicative of the results that may be expected for the
full fiscal year. These consolidated financial statements should be read in
conjunction with the consolidated audited financial statements as of December
31, 1998 and 1997 and for the period from July 1, 1996 (inception) to December
31, 1996 and for each of the two years in the period ended December 31, 1998
included in the registration statement of Trex Company, Inc. on Form S-1 (File
No. 333-63287), as filed with the Securities and Exchange Commission.

3.  Inventory

Inventories consist of the following:

<TABLE>
<CAPTION>
                                                                      December 31, 1998         March 31, 1999
                                                                   ---------------------    ---------------------
<S>                                                                  <C>                       <C>
Finished goods.....................................................      $4,847,000              $1,731,000
Raw materials......................................................       1,160,000               1,380,000
                                                                   ---------------------    ---------------------
                                                                         $6,007,000              $3,111,000
                                                                   =====================   ======================
</TABLE>

4.  Debt

On March 23, 1999, the Company revised the terms of its bank revolving credit
facility. The new terms of the revolving credit facility provide for borrowings
of up to $10.0 million for working capital and general corporate purposes. In
addition, under this facility, the Company may obtain a total of $7.5 million of
term loans to finance equipment purchases. Amounts drawn under the revolving
credit facility and any term loans bear interest at an 

                                      -10-
<PAGE>
 
annual rate equal to LIBOR plus 2%. The revolving credit facility will mature on
May 31, 2001. The unpaid principal balance of term loans outstanding on August
31, 1999 will be payable in consecutive monthly payments beginning on October 1,
1999 and the entire unpaid principal balance of the term loans and all accrued
interest thereon will be payable in full on April 1, 2000.

In the three-month period ended March 31, 1999, the Company borrowed $1.5
million under a $4.6 million construction loan for application to the
construction of its second manufacturing facility. The loan accrues interest at
7.5% per annum and is payable in November 1999. The Company intends to refinance
this construction loan with long-term borrowings upon completion of the
manufacturing facility.

5.  Members' Equity

The following table sets forth the computation of basic earnings per junior
unit:

<TABLE>
<CAPTION>
                                                       Three Months Ended March 31,
                                                  -----------------------------------
                                                         1998               1999
                                                  ----------------   ----------------
<S>                                                 <C>                <C>
Numerator:
  Net income......................................      $5,074,000         $7,558,000
  Preferred dividends.............................        (101,000)          (101,000)
                                                  ----------------    ---------------
  Net income available to junior unitholders......      $4,973,000         $7,457,000
                                                  ================    ===============
 
Denominator:
  Denominator for basic earnings per junior unit
   -weighted average units outstanding...........            4,000              4,000
                                                  ================    =============== 
 
Basic earnings per junior unit....................      $ 1,243.25         $ 1,864.25
                                                  ================    ===============
</TABLE>

The basic earnings per junior unit amounts shown above have not been adjusted to
reflect (i) the Reorganization, (ii) the issuance of 9,500,000 shares of Trex
Company, Inc. Common Stock in exchange for the junior units in the Company or
(iii) the effect of federal and state income taxes, since the Company was not
subject to income taxes for the periods presented. Fully diluted earnings per
junior unit is the same as basic earnings per junior unit, and, therefore, is
not separately presented.

6.  Seasonality

The Company's net sales and income from operations have historically varied from
quarter to quarter. Such variations are principally attributable to seasonal
trends in the demand for Trex. The Company typically experiences lower net sales
during the fourth quarter due to holidays and adverse weather conditions in
certain regions, which reduce the level of home improvement and new construction
activity. Net sales during the first quarter of 1998 accounted for approximately
33% of annual sales in the year ended December 31, 1998.

7.   Pro Forma Data (Unaudited)

The unaudited pro forma consolidated balance sheet data set forth in the
following table give effect to the Reorganization (see Note 1) as if the
Reorganization had occurred on March 31, 1999 and reflect (i) the issuance of a
$3.1 million note by Trex Company, Inc. in exchange for the preferred units in
the Company, (ii) the distribution of previously taxed earnings of the Company
of approximately $10.2 million and a return of capital totaling approximately
$2.4 million and (iii) the issuance of 9,500,000 shares of Trex Company, Inc.
Common Stock in exchange for the junior units in the Company.

                                      -11-
<PAGE>
 

The unaudited supplemental pro forma consolidated balance sheet data set forth 
in the following table give effect to (i) the LLC Distribution of approximately
$12.6 million at March 31, 1999, (ii) the issuance of a $3.1 million note by
Trex Company, Inc. in exchange for the preferred units in the Company, (iii) a
net deferred tax liability of approximately $2.6 million that would have been
recorded by the Company if it had converted to C corporation status on March 31,
1999, (iv) a $1.1 million extraordinary charge for the extinguishment of
debt repaid from the net proceeds of the IPO, (v) the issuance of 9,500,000
shares of Trex Company, Inc. Common Stock in exchange for the junior units in
the Company and (vi) the sale by Trex Company, Inc. of 4,615,450 shares of
Common Stock in the IPO and the application of the net proceeds therefrom.

<TABLE>
<CAPTION>
                                                                                 March 31, 1999
                                                       ------------------------------------------------------------------
                                                       TREX Company, LLC                      Trex Company, Inc.
                                                       -----------------           --------------------------------------
                                                                                                         Supplemental Pro
                                                          Historical               Pro Forma                  Forma
                                                          ----------               ---------             ----------------
                                                                                 (in thousands)

<S>                                                        <C>                      <C>                       <C>
Cash and cash equivalents................                  $ 3,439                  $     0                   $ 1,884
Accounts receivable, net.................                    4,746                    4,746                     4,746
Inventories..............................                    3,111                    3,111                     3,111
Prepaid expenses.........................                    1,065                    1,065                       839
                                                           -------                  -------                   -------
  Total current assets...................                   12,361                    8,922                    10,580
                                                                                                              -------
Property, plant and equipment, net.......                   41,118                   41,118                    41,118
Intangible assets, net...................                    9,089                    9,089                     9,089
Deferred financing charges, net..........                      221                      221                         -
                                                           -------                  -------                   -------
  Total assets...........................                  $62,789                  $59,350                   $60,787
                                                           =======                  =======                   =======
 
Accounts payable.........................                  $ 6,007                  $ 6,007                   $ 6,007
Other current liabilities................                    9,304                   21,456                     5,126
                                                           -------                  -------                   -------
  Total current liabilities..............                   15,311                   27,463                    11,133
                                                           
Deferred taxes...........................                        -                        -                     2,586
Long term debt...........................                   26,905                   26,905                     4,505
                                                           -------                  -------                   -------
  Total liabilities......................                   42,216                   54,368                    18,224
                                                           -------                  -------                   -------
Preferred units..........................                    3,000                        -                         -
Junior units.............................                    2,350                        -                         -
Preferred stock..........................                        -                        -                         -
Common stock.............................                        -                       95                       141
Additional capital.......................                        -                        -                    41,178
Undistributed income/retained earnings...                   15,223                    4,887                     1,244
                                                           -------                  -------                   -------
  Total members'/stockholders' equity                       20,573                    4,982                    42,563
                                                           -------                  -------                   -------
    Total liabilities and members'/
      stockholders' equity...............                  $62,789                  $59,350                   $60,787
                                                           =======                  =======                   =======
</TABLE>

The pro forma consolidated statement of operations data set forth in the 
accompanying consolidated statements of operations give effect to the 
Reorganization as if the Reorganization had occurred on January 1 of each 
period presented. The pro forma income taxes and pro forma net income reflect 
federal and state income taxes (assuming a 40% combined effective tax rate) as 
if the Company had been taxed as a C corporation for the three months ended 
March 31, 1998 and 1999. Pro forma weighted average shares outstanding reflect 
9,500,000 shares of Trex Company, Inc. Common Stock outstanding, which assumes
that the shares issued in the Reorganization were outstanding for the three-
month periods ended March 31, 1998 and 1999 (See Note 1). Fully diluted income
per share is the same as basic income per share, and, therefore, is not
separately presented.

                                      -12-
<PAGE>
 
The following table sets forth the computation of basic earnings per common
share on a supplemental pro forma basis:

<TABLE>
<CAPTION>
                                                                                       Three Months Ended
                                                                                            March 31,
                                                                               ----------------------------------
                                                                                    1998                 1999
                                                                               --------------     ---------------
<S>                                                                            <C>                  <C>
Numerator:                                                                     
  Net income..................................................................    $ 5,074,000         $ 7,558,000
  Reduction in interest expense, net..........................................        694,000             694,000
  Pro forma income tax provision..............................................     (2,307,000)         (3,301,000)
                                                                                  -----------         -----------
  Supplemental pro forma net income available to common shareholders..........    $ 3,461,000         $ 4,951,000
                                                                                  ===========         ===========
                                                                               
Denominator:                                                                   
  Denominator for pro forma basic earnings per common 
    share-weighted average shares outstanding.................................     14,115,450          14,115,450
                                                                                  ===========         ===========
                                                                               
  Supplemental pro forma basic earnings per common share......................          $0.25               $0.35
                                                                                  ===========         ===========
</TABLE>

The foregoing supplemental pro forma basic earnings per common share amounts
have been adjusted to reflect the Reorganization (see Note 1) as if the
Reorganization had occurred on January 1, 1998 and 1999, respectively. The
supplemental pro forma reduction in interest expense gives effect to the
repayment of the senior and subordinated notes of the Company (see Note 1) as if
such repayments had been made as of January 1, 1998 and 1999, respectively. The
supplemental pro forma income tax provision reflects federal and state income
taxes (assuming a 40% combined effective tax rate) as if the Company had been
taxed as a C corporation as of January 1, 1998 and 1999, respectively.
Supplemental pro forma net income available to common shareholders assumes the
preferred units were exchanged for a note of Trex Company, Inc. as of January 1,
1998 and 1999, and excludes one-time charges relating to the Reorganization and
IPO, including (i) a net deferred tax liability of approximately $2.6 million
and (ii) $1.1 million extraordinary charge for the extinguishment of debt repaid
from the net proceeds of the IPO. Supplemental pro forma weighted average shares
outstanding assumes that the shares issued in the Reorganization and the IPO
were outstanding for the entire period. Supplemental pro forma fully diluted
earnings per share is the same as supplemental pro forma basic earnings per
share, and therefore, is not separately presented.

                                      -13-
<PAGE>
 
Item 2.  Management's Discussion and Analysis of Financial Condition and Results
         of Operations

This Management's Discussion and Analysis of Financial Condition and Results of
Operations contains forward-looking statements within the meaning of Section 27A
of the Securities Act of 1933 and Section 21E of the Securities Exchange Act of
1934.  All statements regarding the Company's expected financial position and
operating results, its business strategy and its financing plans are forward-
looking statements.  These statements are subject to risks and uncertainties
that could cause the Company's actual results to differ materially.  Such risks
and uncertainties include the Company's ability to increase market acceptance of
its Trex product; the Company's lack of product diversification; the Company's
current dependence on a single manufacturing facility and its ability to
increase its manufacturing capacity in its existing facility and its proposed
new facility; the Company's reliance on the supply of raw materials used in its
production process; the Company's sensitivity to economic conditions, which
influence the level of activity in home improvements and new home construction;
the Company's ability to manage its growth; the Company's significant capital
requirements; and the Company's dependence on its largest distributors to market
and sell its products.

References to the "Company" in the following discussion mean TREX Company, LLC
until the consummation of the reorganization on April 7, 1999 (the
"Reorganization") and Trex Company, Inc. and its wholly owned subsidiary, TREX
Company, LLC, at all times thereafter. See Note 1 to the Balance Sheets of Trex
Company, Inc. and Note 1 to the Consolidated Financial Statements of TREX
Company, LLC included elsewhere in this report.

Overview

The Company is the nation's largest manufacturer of non-wood decking alternative
products, which are marketed under the brand name Trex.(R)  Trex Wood-
Polymer(TM) lumber ("Trex") is a wood/plastic composite which is manufactured in
a proprietary process that combines waste wood fibers and reclaimed
polyethylene.  Trex is used primarily for residential and commercial decking.
Trex also has non-decking product applications, including industrial block
flooring, applications for parks and recreational areas, floating and fixed
docks and other marine applications, and landscape edging.

Net sales consists of sales net of returns and discounts. Cost of sales consists
of raw material costs, direct labor costs and manufacturing costs, including
depreciation. The principal component of selling, general and administrative
expenses is sales and marketing costs, which have increased significantly as the
Company has sought to build brand awareness of Trex in the decking market. Sales
and marketing costs consist primarily of salaries, commissions and benefits paid
to sales and marketing personnel, advertising expenses and other promotional
costs. General and administrative expenses include salaries and benefits of
personnel engaged in research and development, procurement, accounting and other
business functions and office occupancy costs attributable to such functions, as
well as amortization expense.

The Company did not record an income tax provision for any period through March
31, 1999.  Until the Reorganization, the Company elected to be treated as a
partnership for federal and state income tax purposes. Accordingly, the
Company's income through April 7, 1999 has been taxed directly to the Company's
members, rather than to the Company.

Three Months Ended March 31, 1999 Compared with Three Months Ended March 31,
1998

Net Sales.   Net sales in the three months ended March 31, 1999 (the "1999
quarter") increased 44.1% to $22.4 million from $15.5 million in the three
months ended March 31, 1998 (the "1998 quarter").  The increase in net sales was
primarily attributable to the growth in sales volume, which increased to 68.9
million pounds of finished product in the 1999 quarter from 51.1 million pounds
in the 1998 quarter, and, to a lesser extent, to a price increase of
approximately 6%.  Production line rate increases and the addition of three
production lines since March 31, 1998 significantly increased the Company's
production capacity in the 1999 quarter.  The increase in the number of 

                                      -14-
<PAGE>
 
dealer outlets, from approximately 1,600 at March 31, 1998 to approximately
2,000 at March 31, 1999, contributed to the growth in sales volume.

Cost of Sales.   Cost of sales increased 34.8% to $9.9 million in the 1999
quarter from $7.4 million in the 1998 quarter. All components of cost of sales
increased to support the higher level of sales activity. Cost of sales as a
percentage of net sales decreased to 44.5% in the 1999 quarter from 47.5% in the
1998 quarter. The decline principally reflected operating efficiencies from
improved production line rates and the economies of scale resulting from the
three additional production lines.

Gross Profit.   Gross profit increased 52.5% to $12.4 million in the 1999
quarter from $8.1 million in the 1998 quarter.  The increase in gross profit was
attributable to the higher sales volume and improved operating efficiencies.
Gross profit as a percentage of net sales increased to 55.5% in the 1999 quarter
from 52.5% in the 1998 quarter.

Selling, General and Administrative Expenses.   Selling, general and
administrative expenses increased 68.4% to $4.1 million in the 1999 quarter from
$2.4 million in the 1998 quarter. The increase was primarily attributable to
higher sales and marketing expenses, which increased 47.7% to $2.1 million in
the 1999 quarter from $1.4 million in the 1998 quarter. The largest component of
the increase was advertising costs, which increased 122.4% as the Company
expanded its advertising and promotional activities. General and administrative
expenses increased 90% to $1.9 million in the 1999 quarter from $1.0 million in
the 1998 quarter. The increase was primarily attributable to costs associated
with an increase in staffing necessary to support the Company's growth, the
Company's second manufacturing facility, which is scheduled to start production
in the fourth quarter of 1999, and an increase in research and development
activities.  Selling, general and administrative expenses as a percentage of net
sales increased to 18.2% in the 1999 quarter from 15.5% in the 1998 quarter.

Interest Expense.   Net interest expense increased 21.4% to $.8 million in the
1999 quarter from $.7 million in the 1998 quarter. The increase reflected higher
average borrowings resulting from indebtedness incurred to finance the Company's
purchase of its Winchester manufacturing facility and Trex Technical Center in
June and November 1998, respectively, its purchase in December 1998 of the site
in Nevada for its second manufacturing facility and commencement of construction
of the Nevada facility in the 1999 quarter.

Net Income.   Net income increased 49.0% to $7.6 million in the 1999 quarter 
from $5.1 million in the 1998 quarter.

Liquidity and Capital Resources

The Company's total assets increased from $51.3 million at December 31, 1998 to
$62.8 million at March 31, 1999. Higher receivables balances resulting from an
increase in net sales in the 1999 quarter accounted for $4.7 million of the
increase. Inventories decreased $2.9 million in relation to the increased net
sales. Property, plant and equipment, net, increased $7.2 million as the Company
incurred the balance of the costs of installing two additional production lines
in its Winchester, Virginia facility and began construction of its second
manufacturing facility in Nevada.

The Company historically has financed its operations and growth primarily with
cash flow from operations, operating leases, normal trade credit terms and
borrowings under its credit facility.

The Company's cash flow from operating activities for the 1999 quarter was 
$9.2 million compared to $6.7 million for the 1998 quarter. Higher sales 
volume accounted for the significant increase in cash flows in the 1999 quarter.

The Company's working capital generally averages between 12% and 18% of net
sales. The Company's working capital needs correlate closely with the level of
the Company's net sales. Consequently, the Company's short-term borrowing
requirements are affected by the seasonality of its business. The Company
currently maintains a 

                                      -15-
<PAGE>
 
revolving credit facility which provides for borrowings of up to $10.0 million
for working capital. In addition, under this facility, the Company may obtain a
total of $7.5 million of term loans to finance equipment purchases. Amounts
drawn under the revolving credit facility and any term loans bear interest at an
annual rate equal to LIBOR plus 2.0%. The revolving credit facility will mature
on May 31, 2001. The unpaid principal balance of term loans outstanding on
August 31, 1999 will be payable in consecutive monthly payments beginning
October 1, 1999, and the entire unpaid principal balance of the term loans and
all accrued interest thereon will be payable in full on April 1, 2000.

The Company substantially reduced its overall long-term indebtedness on 
April 13, 1999 following its repayment of $26.3 million principal amount of 
senior and subordinated notes with the net proceeds of the Company's initial 
public offering.  As of March 31, 1999, the Company's long-term indebtedness 
(excluding such indebtedness repaid on April 13, 1999) had an overall weighted 
average interest rate of approximately 7.2% per annum.

The Company financed its purchase of its Winchester, Virginia facility in June
1998 with a ten-year term loan of $3.8 million. Pursuant to an interest rate
swap agreement, the Company pays interest on this loan at an annual rate of
7.12%.

The Company financed its purchase of the Trex Technical Center in November 1998
in part with the proceeds of a ten-year term loan of $1.0 million. Pursuant to
an interest rate swap agreement, the Company pays interest on this loan at an
annual rate of 6.8%.

The Company financed its acquisition of the site for its second manufacturing
facility located in Nevada in December 1998 in part with a $2.1
million loan which is payable in September 1999. The Company will finance
construction of the facility in part with proceeds of up to $4.6 million under a
construction loan which is payable in November 1999. The site acquisition and
construction loans accrue interest at an annual rate of 7.5%. The Company
intends to refinance both loans with long-term borrowings.  As of April 30,
1999, the Company had expended approximately $9.8 million of the approximately
$19.6 million it estimates will be required to complete construction and
equipping of the Nevada facility. The Company will fund the remaining $9.8
million of expenditures from cash on hand, cash flow from operations and
borrowings under its construction loan and credit facility.

As part of the Reorganization, TREX Company, LLC in April 1999 made the LLC
Distribution of approximately $12.6 million to certain of its members.  See Note
1 to the Balance Sheets of Trex Company, Inc. and Note 1 to the Consolidated 
Financial Statements of TREX Company, LLC included elsewhere in this report. 
The LLC Distribution was funded from $3.9 million of cash on hand, $4.4 million
of borrowings under the credit facility and $4.3 million of net proceeds from 
the initial public offering.

Expansion of the Company's production capacity will require significant capital
expenditures. The Company currently estimates that its aggregate capital
requirements in 1999 and 2000 will total approximately $23.8 million, of which
approximately $20.3 million is expected to be incurred in 1999 and approximately
$3.5 million in 2000. Capital expenditures in the first quarter of 1999 totaled
approximately $8.1 million. Capital expenditures will be used primarily for the
construction and equipping of the Company's new manufacturing facility in
Nevada. The Company believes that cash on hand, cash flow from operations and
borrowings expected to be available under the Company's credit agreements and
construction loan for the new facility will provide sufficient funds to enable
the Company to expand its business as currently planned for at least the next 12
months. The actual amount and timing of the Company's future capital
requirements may differ materially from the Company's estimate depending on the
demand for Trex and new market developments and opportunities. The Company may
determine that it is necessary or desirable to obtain financing for such
requirements through bank borrowings or the issuance of debt or equity
securities. Debt financing would increase the leverage of the Company, while
equity financing may dilute the ownership of the Company's stockholders. There
can be no assurance as to whether, or as to the terms on which, the Company will
be able to obtain such financing.

                                      -16-
<PAGE>
 
Year 2000 Issue

The Company's Program.   The Company has undertaken a program to address the
Year 2000 issue with respect to the following: (i) the Company's information
technology and operating systems, including its billing, accounting and
financial reporting systems; (ii) the Company's non-information technology
systems, such as buildings, plant, equipment and other infrastructure systems
that may contain embedded microcontroller technology; (iii) certain systems of
the Company's major suppliers and material service providers, insofar as such
systems relate to the Company's business activities with such parties; and (iv)
the Company's major distributors, insofar as the Year 2000 issue relates to the
ability of such distributors to distribute Trex to the Company's dealer outlets.
As described below, the Company's Year 2000 program involves (i) an assessment
of the Year 2000 problems that may affect the Company, (ii) the development of
remedies to address the problems discovered in the assessment phase and the
testing of such remedies and (iii) the preparation of contingency plans to deal
with worst case scenarios.

Assessment Phase.   As part of the assessment phase of its program, the Company
will attempt to identify substantially all of the major components of the
systems described above. To determine the extent to which such systems are
vulnerable to the Year 2000 issue, the Company has completed an evaluation of
its software applications and began remediation and testing activities for such
applications in the first quarter of 1999. In addition, in the fourth quarter of
1998, the Company completed its distribution of letters to certain of its major
suppliers and other material service providers and to the Company's major
distributors, requesting them to provide the Company with detailed, written
information concerning existing or anticipated Year 2000 compliance by their
systems insofar as the systems relate to such parties' business activities with
the Company. The Company is currently processing the responses to those
inquiries and re-soliciting responses from those entities that have not yet
responded.

Remediation and Testing Phase.   Based upon the results of its assessment
efforts, the Company will undertake remediation and testing activities. The
Company intends to complete this phase by June 30, 1999. The activities
conducted during the remediation and testing phase are intended to address
potential Year 2000 problems in computer software used by the Company in its
information technology and non-information technology systems in an attempt to
demonstrate that this software will be made substantially Year 2000 compliant on
a timely basis. In this phase, the Company will first evaluate a program
application and, if a potential Year 2000 problem is identified, will take steps
to attempt to remediate the problem and individually test the application to
confirm that the remediating changes are effective and have not adversely
affected the functionality of that application. After the individual
applications and system components have undergone remediation and testing
phases, the Company will conduct integrated testing for the purpose of
demonstrating functional integrated systems operation.

Contingency Plans.   The Company intends to develop contingency plans to handle
its most reasonably likely worst case Year 2000 scenarios, which it has not yet
identified fully. The Company intends to complete its determination of such
worst case scenarios after it has received and analyzed responses to
substantially all of the inquiries it has made of third parties and completed
its remediation and testing activities. The Company expects to complete
development of its contingency plans by August 31, 1999.

Costs Related to the Year 2000 Issue.   To date, the Company has incurred
approximately $10,000 in costs for its Year 2000 program. Such costs do not
include internal staff costs, consisting principally of payroll costs, incurred
on Year 2000 matters, because the Company does not separately track such costs.
The Company currently estimates that it will incur additional costs (excluding
internal staff costs), which are not expected to exceed approximately $45,000,
to complete its Year 2000 compliance work. Such costs will constitute
approximately 40% of the Company's budgeted expenditures for information
technology. Actual costs may vary from the foregoing estimates based on the
Company's evaluation of responses to its third-party inquiries and on the
results of its remediation and testing activities. The Company expects to fund
its Year 2000 remediation costs out of the cash flows generated by its
operations. The Company has not deferred any of its information technology
projects to date as a result of the Year 2000 issue.

                                      -17-
<PAGE>
 
Risks Related to the Year 2000 Issue.   Although the Company's Year 2000 efforts
are intended to minimize the adverse effects of the Year 2000 issue on the
Company's business and operations, the actual effects of the issue and the
success or failure of the Company's efforts described above cannot be known
until the year 2000. Failure by the Company and its major suppliers, other
material service providers and major distributors to address adequately their
respective Year 2000 issues in a timely manner insofar as such issues relate to
the Company's business could have a material adverse effect on the Company's
business, results of operations and financial condition.

Item 3.  Quantitative and Qualitative Disclosures About Market Risk

The Company's major market risk exposure is to changing interest rates.  The
Company's policy is to manage interest rates through a combination of fixed-rate
and variable-rate debt.  As of March 31, 1999, excluding the indebtedness repaid
on April 13, 1999 with the net proceeds of the initial public offering of Trex
Company, Inc., the Company's long-term debt consisted of fixed-rate debt of
$3.6 million and variable-rate debt of $4.7 million.  Substantially all
of the Company's variable-rate debt is based on LIBOR.  The Company uses
interest rate swap contracts to manage its exposure to fluctuations in interest
rates on its variable-rate debt.  As of March 31, 1999, the Company had
effectively fixed its interest rate exposure at approximately 7% on 
approximately $4.7 million of its variable-rate debt through 2008.

The Company does not use foreign currency forward contracts or commodity
contracts and does not have any material foreign currency exposure.

                         Part II.   OTHER INFORMATION

Item 2.  Changes in Securities and Use of Proceeds

The following information is furnished by Trex Company, Inc. with respect to the
initial public offering by the Company and certain stockholders of the Company
(the "Selling Stockholders") of 4,718,450 shares of the Company's Common Stock.
Of such shares, 4,615,450 shares were sold by the Company and 103,000 shares 
were sold by the Selling Stockholders.

The offering and sale of the Common Stock was effected pursuant to registration
statement no. 333-63287, which was declared effective by the Securities and
Exchange Commission on April 8, 1999.

The offering commenced on April 8, 1999 following declaration of effectiveness
of the Company's registration statement. The offering has terminated following
the sale of all 4,718,450 shares of Common Stock registered. Of the shares sold
by the Company, 4,000,000 shares were sold on April 13, 1999 and 615,450 shares
were sold on May 6, 1999 pursuant to the underwriters' exercise in full of their
over-allotment option. The managing underwriter of the offering was J.C.
Bradford & Co. The sole class of securities registered was Common Stock, par
value $.01 per share, of the Company.

The following information is provided with respect to the shares of Common Stock
registered for the account of the Company:

<TABLE>
        <S>                                                            <C>
        Amount registered                                              4,615,450 shares

        Aggregate price of offering amount registered                  $46,154,500
        
        Amount sold                                                    4,615,450 shares
        
        Aggregate offering price of amount sold                        $46,154,500
</TABLE>

                                      -18-
<PAGE>
 
The following information is provided with respect to the shares of Common Stock
registered for the account of the Selling Stockholders:

<TABLE>
        <S>                                                            <C>
        Amount registered                                              103,000 shares

        Aggregate price of offering amount registered                  $1,030,000

        Amount sold                                                    103,000 shares

        Aggregate offering price of amount sold                        $1,030,000
</TABLE>

The foregoing information reflects the initial public offering price of $10.00
per share before deducting underwriting discounts and commissions of $0.70 per
share and expenses of the offering.  Of the shares offered and sold for the
Company's account, 200,000 shares were sold to certain individuals, including
directors, executive officers and employees of the Company, members of their
families or friends, and other persons having business relationships with the
Company, at the initial public offering price less the underwriting discounts
and commissions.

In connection with the offering, the Company incurred for its own account total
expenses of approximately $4.9 million.  Such expenses consisted of underwriting
discounts and commissions of approximately $3.2 million and other expenses,
including legal, accounting, financial advisory, printing and filing fees, of
approximately $1.7 million.  The amount of other expenses constitutes the
Company's reasonable estimate.  All of the foregoing expenses involved direct or
indirect payments to persons who were not directors or officers of the Company
or their associates, owners of 10% or more of any class of equity securities of
the Company, or affiliates of the Company.

After deducting the total expenses of approximately $4.9 million referred to
above, the net proceeds of the offering to the Company were approximately $41.2
million. The net proceeds of approximately $35.5 million from the sale of
4,000,000 shares on April 13, 1999 were used as follows: approximately $28.1
million was used to repay approximately $26.3 million of senior and subordinated
notes of TREX Company, LLC, accrued interest thereon and a related prepayment
premium of approximately $1.5 million; approximately $3.1 million was used to
repay the note issued to the preferred member of TREX Company, LLC in the
Reorganization described in Note 1 to the Balance Sheets of Trex Company, Inc.
and Note 1 to the Consolidated Financial Statements of TREX Company, LLC
included elsewhere in this report; and approximately $4.3 million was used to
fund a portion of the LLC Distribution described in Note 1 to the Balance Sheets
of Trex Company, Inc. and Note 1 to the Consolidated Financial Statements of
TREX Company, LLC included elsewhere in this report. The net proceeds of
approximately $5.7 million from the sale of 615,450 shares pursuant to the
underwriters' exercise of their over-allotment option were used as follows:
approximately $4.4 million was used to repay borrowings under the Company's
revolving credit facility and approximately $1.3 million has been temporarily
invested in short-term, investment grade repurchase obligations pending
application for working capital and general corporate purposes.

Of the net offering proceeds, the $28.1 million used to repay the senior and
subordinated notes of TREX Company, LLC constituted direct payments to persons
who collectively owned 10% of the Company's Common Stock immediately prior to
the IPO. Such persons (collectively, the "Institutional Investors") are
Connecticut General Life Insurance Company, Life Insurance Company of North
America and The Lincoln National Life Insurance Company. In addition, of the net
offering proceeds, the $4.3 million used to fund a portion of the LLC
Distribution constituted direct payments to the Institutional Investors and to
the Company's four directors and executive officers prior to the IPO, each of
whom owns more than 10% of the Company's Common Stock (collectively, the
"Management Holders"). The Management Holders are Robert G. Matheny, Anthony J.
Cavanna, Andrew U. Ferrari and Roger A. Wittenberg. The application of net
offering proceeds to repay borrowings under the Company's revolving credit
facility used to fund a portion of the LLC Distribution may be deemed to
constitute indirect payments to the Institutional Investors and the Management
Holders.

Item 4.  Submission of Matters to a Vote of Security Holders

During the quarterly period ended March 31, 1999 covered by this report, all of
the outstanding capital stock of the Company was owned by TREX Company, LLC.  As
the Company's sole stockholder during this period, TREX Company, LLC held
special meetings on March 23, 1999 and March 27, 1999 and took action by written
consent in lieu of a meeting on March 12, 1999 and March 20, 1999.

                                      -19-
<PAGE>
By a written consent dated March 12, 1999, the stockholder voted to approve
matters relating to the reorganization consummated on April 7, 1999 (the
"Reorganization") and the Company's proposed initial public offering, the 
amendment and restatement of the Company's certificate of incorporation and 
by-laws, the Company's 1999 Stock Option and Incentive Plan, 1999 Incentive 
Plan for Outside Directors and 1999 Employee Stock Purchase Plan, the 
classification of the Company's Board of Directors and the election of William 
F. Andrews and William H. Martin, III to the Board of Directors effective upon 
the consummation of the Company's initial public offering.  The terms of Robert
G. Matheny, Anthony J. Cavanna, Andrew U. Ferrari and Roger A. Wittenberg as 
directors of the Company continued after the effective date of the written 
consent.

By a written consent dated March 20, 1999, the stockholder voted to approve
matters relating to the Reorganization and the Company's proposed initial public
offering and the amendment and restatement of the Company's certificate of
incorporation.

At a special meeting held on March 23, 1999, the stockholder voted to approve
matters relating to the Reorganization and the Company's proposed initial public
offering, the classification of the Company's Board of Directors and the
election of William F. Andrews and William H. Martin, III to the Board of
Directors effective upon the consummation of the Company's initial public
offering. The terms of Robert G. Matheny, Anthony J. Cavanna, Andrew U. Ferrari
and Roger A. Wittenberg as directors of the Company continued after the meeting.

At a special meeting held on March 27, 1999, the stockholder voted to approve
matters relating to the Reorganization and the Company's proposed initial public
offering.

Item 6.  Exhibits and Reports on Form 8-K

<TABLE>
        <S>    <C>
        (a)     The Company files herewith the following exhibits:

                3.1    Restated Certificate of Incorporation of the Company. Filed as 
                       Exhibit 3.1 to the Company's Registration Statement on Form S-1
                       (No. 333-63287) and incorporated herein by reference.
               
                3.2    Amended and Restated By-Laws of the Company. Filed as 
                       Exhibit 3.2 to the Company's Registration Statement on Form S-1 
                       (No. 333-63287) and incorporated herein by reference.
               
                4.1    Specimen certificate representing the Common Stock. Filed as 
                       Exhibit 4.1 to the Company's Registration Statement on Form S-1
                       (No. 333-63287) and incorporated herein by reference.
               
                10.1   Registration Rights Agreement, dated as of April 7, 1999, among 
                       Trex Company, Inc. and each of the persons named on the schedule
                       thereto. Filed herewith.
               
                10.2   Trex Company, Inc. 1999 Stock Option and Incentive Plan. Filed as
                       Exhibit 4.2 to the Company's Registration Statement on Form S-8
                       (No. 333-76847) and incorporated herein by reference.
               
                10.3   Trex Company, Inc. 1999 Incentive Plan for Outside Directors.
                       Filed herewith.
               
                10.4   Form of Distributor Agreement of the Company. Filed as Exhibit 
                       10.6 to the Company's Registration Statement on Form S-1 
                       (No. 333-63287) and incorporated herein by reference.
               
                10.5   $3,780,000 Promissory Note, dated June 15, 1998, made by TREX
                       Company, LLC payable to First Union National Bank of Virginia. 
                       Filed as Exhibit 10.7 to the Company's Registration Statement
                       on Form S-1 (No. 333-63287) and incorporated herein by 
                       reference.
               
                10.6   $1,035,000 Promissory Note, dated November 20, 1998, made by 
                       TREX Company, LLC payable to First Union National Bank of 
                       Virginia. Filed as Exhibit 10.8 to the Company's Registration 
                       Statement on Form S-1 (No. 333-63287) and incorporated herein 
                       by reference.
               
                10.7   Business Loan Agreement, dated December 2, 1998, between TREX
                       Company, LLC and Pioneer Citizens Bank of Nevada. Filed as 
                       Exhibit 10.9 to the Company's Registration Statement on 
                       Form S-1 (No. 333-63287) and incorporated herein by reference.
               
                10.8   Construction Loan Agreement, dated February 5, 1999, between 
                       TREX Company, LLC and Pioneer Citizens Bank of Nevada. Filed
                       as Exhibit 10.10 to the Company's Registration Statement on 
                       Form S-1 (No. 333-63287) and incorporated herein by reference.
               
                10.9   Amended and Restated Credit Agreement, dated as of March 23, 
                       1999, between the Company and First Union National Bank of 
                       Virginia. Filed as Exhibit 10.14 to the Company's Registration 
                       Statement on Form S-1 (No. 333-63287) and incorporated herein 
                       by reference.
               
                27.    Financial Data Schedule.  Filed herewith.

        (b)     The Company did not file any Current Reports on Form 8-K during
                the quarterly period ended March 31, 1999.
</TABLE> 
                                      -20-
<PAGE>
 
                                  SIGNATURES

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

                                    TREX COMPANY, INC.
                                    (Registrant)



Date:  May 17, 1999                 /s/  Anthony J. Cavanna
                                    -----------------------
                                    Anthony J. Cavanna, Executive Vice 
                                      President and Chief Financial Officer
                                      (Duly Authorized Officer and Principal
                                       Financial Officer)

                                      -21-
<PAGE>
 
                                 EXHIBIT INDEX
                                 -------------

                   (Pursuant to Item 601 of Regulation S-K)


3.1     Restated Certificate of Incorporation of the Company. Filed as Exhibit
        3.1 to the Company's Registration Statement on Form S-1 (No. 333-63287)
        and incorporated herein by reference.

3.2     Amended and Restated By-Laws of the Company. Filed as Exhibit 3.2 to the
        Company's Registration Statement on Form S-1 (No. 333-63287) and
        incorporated herein by reference.

4.1     Specimen certificate representing the Common Stock. Filed as Exhibit 4.1
        to the Company's Registration Statement on Form S-1 (No. 333-63287) and
        incorporated herein by reference.

10.1    Registration Rights Agreement, dated as of April 7, 1999, among Trex
        Company, Inc. and each of the persons named on the schedule thereto.
        Filed herewith.

10.2    Trex Company, Inc. 1999 Stock Option and Incentive Plan. Filed as
        Exhibit 4.2 to the Company's Registration Statement on Form S-8
        (No. 333-76847) and incorporated herein by reference.

10.3    Trex Company, Inc. 1999 Incentive Plan for Outside Directors. Filed 
        herewith.

10.4    Form of Distributor Agreement of the Company. Filed as Exhibit 10.6 to
        the Company's Registration Statement on Form S-1 (No. 333-63287) and
        incorporated herein by reference.

10.5    $3,780,000 Promissory Note, dated June 15, 1998, made by TREX Company,
        LLC payable to First Union National Bank of Virginia. Filed as Exhibit
        10.7 to the Company's Registration Statement on Form S-1 (No. 333-63287)
        and incorporated herein by reference.

10.6    $1,035,000 Promissory Note, dated November 20, 1998, made by TREX
        Company, LLC payable to First Union National Bank of Virginia. Filed as
        Exhibit 10.8 to the Company's Registration Statement on Form S-1 (No.
        333-63287) and incorporated herein by reference.

10.7    Business Loan Agreement, dated December 2, 1998, between TREX Company,
        LLC and Pioneer Citizens Bank of Nevada. Filed as Exhibit 10.9 to the
        Company's Registration Statement on Form S-1 (No. 333-63287) and
        incorporated herein by reference.

10.8    Construction Loan Agreement, dated February 5, 1999, between TREX
        Company, LLC and Pioneer Citizens Bank of Nevada. Filed as Exhibit 10.10
        to the Company's Registration Statement on Form S-1 (No. 333-63287) and
        incorporated herein by reference.

10.9    Amended and Restated Credit Agreement, dated as of March 23, 1999,
        between the Company and First Union National Bank of Virginia. Filed as
        Exhibit 10.14 to the Company's Registration Statement on Form S-1 (No.
        333-63287) and incorporated herein by reference.

27      Financial Data Schedule. Filed herewith.



<PAGE>
 
                                                                   EXHIBIT 10.1

                         REGISTRATION RIGHTS AGREEMENT

     REGISTRATION RIGHTS AGREEMENT (this "Agreement"), is dated as of this 7th
day of April, 1999 among Trex Company, Inc., a Delaware corporation (the
"Company"), each of the Institutional Investors named on Schedule A hereto and
                                                         ----------           
each of the Management Holders named on Schedule B hereto.
                                        ----------        

                              W I T N E S S E T H:

     WHEREAS, TREX Company, LLC ("TREX LLC"), the Institutional Investors and
the Management Holders are parties to a Members' Agreement, dated as of August
29, 1996, as amended (the "Members' Agreement");

     WHEREAS, the Company, TREX LLC and the members of TREX LLC have consummated
a reorganization as a result of which, among other things, (i) the Company has
issued all outstanding shares of its common stock, $.01 par value per share (the
"Common Stock"), to the Institutional Investors and the Management Holders in
exchange for all outstanding junior membership interests in TREX LLC and (ii)
TREX LLC has become a wholly owned subsidiary of the Company;

     WHEREAS, the Company intends to consummate an initial public offering of
the Common Stock;

     WHEREAS, the Members' Agreement will be terminated upon consummation of
such initial public offering;

     WHEREAS, the parties hereto wish to provide in this Agreement for the
registration rights currently set forth in the Members' Agreement;

     NOW THEREFORE, in consideration of the mutual promises herein contained,
the parties hereto mutually agree as follows:

     1.  Certain Definitions.
         --------------------

     As used herein, the following terms shall have the meanings set forth
below:

     "Business Day" means a day other than a Saturday, a Sunday or a day on
      ------------                                                         
which banks in New York City are required or permitted by law (other than
general banking moratorium or holiday for a period exceeding four (4)
consecutive days) to be closed.

     "Common Stock" has the meaning set forth in the recitals herein.
      ------------                                                   
<PAGE>
 
     "Exchange Act" means the Securities Exchange Act of 1934, as amended, and
      ------------                                                            
the rules and regulations of the SEC promulgated thereunder.

     "Incidental Registration" has the meaning set forth in Section 2.2 hereof.
      -----------------------                                                  

     "Initiating Holders" means, at any time, the Institutional Investors
      ------------------                                                 
holding at least fifty percent (50%) of the Registrable Securities at such time
held by all Institutional Investors.

     "Initial Public Offering Date" means the first date upon which shares of
      ----------------------------                                           
the Common Stock shall have been issued or sold pursuant to an underwritten
public offering (whether on a firm commitment basis or a best efforts basis if
such best efforts are successful) thereof pursuant to an effective registration
statement filed with the SEC pursuant to the Securities Act.

     "Institutional Investors" means those Persons named on Schedule A hereto.
      -----------------------                               ----------        

     "Management Holders" means those persons named on Schedule B hereto.
      ------------------                               ----------        

     "NASDAQ" means the National Association of Securities Dealers Automated
      ------                                                                
Quotation System.

     "Person" means an individual, partnership, corporation, limited liability
      ------                                                                  
company, trust, unincorporated organization, or a government or agency or
political subdivision thereof.

     "Public Offering" means any sale of Common Stock in a transaction either
      ---------------                                                        
registered under, or requiring registration under, Section 5 of the Securities
Act.

     "Registrable Securities" means (i) all shares of Common Stock issued to the
      ----------------------                                                    
Institutional Investors on or prior to the date of this Agreement and (ii) any
Securities paid, issued or distributed in respect of any such Common Stock by
way of stock dividend or distribution or stock split or in connection with a
combination of shares, recapitalization, reorganization, merger, consolidation
or otherwise.  As to any particular Registrable Securities once issued, such
Securities shall cease to be Registrable Securities: (i) when a registration
statement with respect to the sale of such Securities shall have become
effective under the Securities Act and such Securities shall have been disposed
of in accordance with such registration statement; (ii) when they shall have
been distributed to the public pursuant to Rule 144 (or any successor provision)
under the Securities Act; or (iii) when they shall have been otherwise
transferred and subsequent disposition of them shall not require registration or
qualification under the Securities Act or any similar state law then in force.

                                       2
<PAGE>
 
     "Registration" means each Required Registration and each Incidental
      ------------                                                      
Registration.

     "Registration Expenses" means all expenses incident to the Company's
      ---------------------                                              
performance of or compliance with Sections 2.1 through Section 2.5 hereof,
inclusive, including, without limitation, all registration and filing fees, fees
and expenses of compliance with securities or blue sky laws (including
reasonable fees and disbursements of counsel in connection with blue sky
qualifications of the Registrable Securities), expenses of printing certificates
for the Registrable Securities in a form eligible for deposit with the
Depository Trust Company, messenger and delivery expenses, internal expenses
(including, without limitation, all salaries and expenses of the Company's
officers and employees performing legal or accounting duties), and fees and
disbursements of counsel for the Company and its independent certified public
accountants (including the expenses of any management review, cold comfort
letters or any special audits required by or incident to such performance and
compliance), securities acts liability insurance (if the Company elects to
obtain such insurance), the reasonable fees and expenses of any special experts
retained by the Company in connection with such registration, fees and expenses
of other Persons retained by the Company and fees and expenses of counsel
(including local counsel) for holders of Registrable Securities, selected by the
Requisite Holders; but not including any underwriting fees, discounts or
commissions attributable to the sale of Registrable Securities or fees and
expenses of more than one counsel representing the holders of Registrable
Securities or any other selling expenses, discounts or commissions incurred in
connection with the sale of Registrable Securities.

     "Required Registration" has the meaning set forth in Section 2.1 hereof.
      ---------------------                                                  

     "Requisite Holders" means, with respect to any registration or proposed
      -----------------                                                     
registration of Registrable Securities pursuant to Section 2 hereof, any
Institutional Investor or Institutional Investors holding at least sixty-six and
two-thirds percent (66-2/3%) of the shares of Registrable Securities to be so
registered.

     "SEC" means, at any time, the Securities and Exchange Commission or any
      ---                                                                   
other federal agency at such time administering the Securities Act.

     "Securities Act" means the Securities Act of 1933, as amended, and the
      --------------                                                       
rules and regulations of the SEC promulgated thereunder.

     "Security" means "security" as defined by Section 2(1) of the Securities
      --------                                                               
Act.

     "Subsidiary" means, as to any Person, any corporation in which such Person
      ----------                                                               
or one or more Subsidiaries of such Person or such Person and one or more
Subsidiaries of such Person owns sufficient voting securities to enable it or
them (as 

                                       3
<PAGE>
 
a group) ordinarily, in the absence of contingencies, to elect a majority of the
directors (or Persons performing similar functions) of such corporation. The
term "Subsidiary," as used herein without reference to any Person, shall mean a
Subsidiary of the Company.

2.  Registration Rights.
    --------------------

    2.1  Required Registration.
         ----------------------

    (a)  Filing of Registration Statement.  The Company will, upon the written
         ---------------------------------                                    
request of the Initiating Holders given at any time after the Initial Public
Offering Date requesting that the Company effect the registration under the
Securities Act of all or part of such Initiating Holders' Registrable Securities
and specifying the Registrable Securities to be sold and the intended method of
disposition thereof, promptly give written notice of such requested registration
to all holders of Registrable Securities, and thereupon will use its best
efforts to effect the registration (the "Required Registration") under the
Securities Act of:

         (i)  the Registrable Securities that the Company has been so requested
to register by the Initiating Holders; and

         (ii)  all other Registrable Securities that the Company has been
requested to register by the holders thereof by written request given to the
Company within thirty (30) days after the giving of such written notice by the
Company (which request shall specify the Registrable Securities to be sold and
the intended method of disposition of such Registrable Securities);

all to the extent required to permit the disposition (in accordance with the
intended method thereof as aforesaid) of the Registrable Securities so to be
registered; provided, however, that the Company shall be required to effect only
two (2) registrations pursuant to this Section 2.1 that are deemed effected
under Section 2.1(e) hereof.

    (b)  Time for Filing and Effectiveness.  On or before the date which is
          ----------------------------------                                
ninety (90) days after the request for such registration, the Company shall file
with the SEC the Required Registration with respect to all Registrable
Securities to be so registered, and shall use its best efforts to cause such
Required Registration to become effective as promptly as practicable after the
filing thereof, and use its best efforts to cause such Required Registration to
become effective no later than the day which is one hundred eighty (180) days
after the request for such registration.

    (c)  Selection of Underwriters.  If Registrable Securities that the Company
          --------------------------                                            
has been requested to register pursuant to a Required Registration are to be
disposed of in an underwritten public offering, the underwriters of such
offering 

                                       4
<PAGE>
 
shall be one or more underwriting firms of recognized standing selected by the
Requisite Holders and reasonably acceptable to the Company.

     (d)  Priority on Required Registrations.  If the managing underwriter shall
          -----------------------------------                                   
advise the Company in writing (with a copy to each holder of Registrable
Securities requesting sale) that, in such underwriter's opinion, the number of
shares of Securities requested to be included in such Required Registration
exceeds the number that can be sold in such offering within a price range
acceptable to the Company (such writing to state the basis of such opinion and
the approximate number of shares of Securities that may be included in such
offering without such effect), the Company will include in such Required
Registration, to the extent of the number of shares of Securities that the
Company is so advised can be sold in such offering:

          (i)  first, Registrable Securities requested to be sold by the
Institutional Investors pursuant to this Section 2.1, pro rata among the holders
requesting sale on the basis of the number of shares of Registrable Securities
requested by each to be included in such Registration; and

          (ii)  second, all other Securities proposed to be registered by the
Company and the Management Holders, in such proportions as the Company and such
Management Holders shall agree.

     (e)  When Required Registration Is Deemed Effected.  A Required
          ----------------------------------------------            
Registration pursuant to this Section 2.1 shall not be deemed to have been
effected for purposes of the proviso to Section 2.1(a) hereof if:

          (i)  the registration does not become effective and remain effective
for a period of at least one hundred eighty (180) days, without interference by
the issuance by the SEC of any stop order with respect thereto;

          (ii)  in the case of any underwritten offering undertaken on a firm
commitment basis, all the Registrable Securities requested to be registered in
connection therewith were not sold;

          (iii) the Requisite Holders withdraw their request for registration in
its entirety at any time because the Requisite Holders reasonably believed that
the registration statement or any prospectus related thereto contained an untrue
statement of a material fact or omitted to state a material fact required to be
stated therein or necessary to make the statements made therein (in the case of
any prospectus, in light of the circumstances under which they were made) not
misleading, notified the Company of such fact and requested that the Company
correct such alleged misstatement or omission, and the Company has refused to
correct such alleged misstatement or omission; or

                                       5
<PAGE>
 
          (iv)  the conditions to closing specified in the purchase
agreement or underwriting agreement entered into in connection with such
Required Registration are not satisfied, other than by reason of some act or
omission by the holders of the Registrable Securities that were to have been
registered and sold.

     2.2  Incidental Registration.
          ------------------------

          (a) Filing of Registration Statement. If the Company at any time
              --------------------------------
proposes to register any shares of Common Stock (an "Incidental Registration")
under the Securities Act (other than pursuant to a registration statement on
Form S-4 or Form S-8 or any successor forms thereto, in connection with an offer
made solely to existing Security holders or employees of the Company), for sale
to the public in a public offering, it will each such time giv prompt written
notice to all holders of Registrable Securities of its intention to do so, which
notice shall be given to all such holders at least thirty (30) Business Days
prior to the date that a registration statement relating to such registration is
proposed to be filed with the SEC. Upon the written request of any such holder
to include its shares under such registration statement (which request shall be
made within fifteen (15) Business Days after the receipt of any such notice and
shall specify the Registrable Securities intended to be disposed of by such
holder), the Company will use its best efforts to effect the registration of all
Registrable Securities that the Company has been so requested to register by
such holder; provided, however, that if, at any time after giving written notice
of its intention to register any Securities and prior to the effective date of
the registration statement filed in connection with such registration, the
Company shall determine for any reason not register such shares of Common Stock,
the Company may, at its election, give written notice of such determination to
each such holder and, thereupon, shall be relieved of its obligation to register
any Registrable Securities of such Persons in connection with such registration.

          (b)  Selection of Underwriters.  Notice of the Company's intention to
               --------------------------                                      
register such shares of Common Stock shall designate the proposed underwriters
of such offering (which shall be one or more underwriting firms of recognized
standing) and shall contain the Company's agreement to use its best efforts, if
requested to do so, to arrange for such underwriters to include in such
underwriting the Registrable Securities that the Company has been so requested
to sell pursuant to this Section 2.2, it being understood that the holders of
Registrable Securities shall have no right to select different underwriters for
the disposition of their Registrable Securities.

          (c)  Priority on Incidental Registrations. If the managing underwriter
               ------------------------------------
shall advise the Company in writing (with a copy to each holder of Registrable

                                       6
<PAGE>
 
Securities requesting sale) that, in such underwriter's opinion, the number of
shares of Common Stock requested to be included in such Incidental Registration
exceeds the number that can be sold in such offering within a price range
acceptable to the Company (such writing to state the basis of such opinion and
the approximate number of shares of Common Stock that may be included in such
offering without such effect), the Company will include in such Incidental
Registration, to the extent of the number of shares of Common Stock that the
Company is so advised can be sold in such offering:

               (i)  in the case of any registration initiated by the Company for
the purpose of selling securities for its own account:

                    (A)  first, the number of shares of Common Stock that the
Company proposes to issue and sell for its own account; and

                    (B)  second, Registrable Securities requested to be sold by
the Institutional Investors pursuant to this Section 2.2 and all shares of
Common Stock proposed to be registered by the Management Holders, pro rata among
such holders on the basis of the number of shares of Common Stock requested by
each to be included in such Registration; and

               (ii)  in the case of a registration initiated by any Management
Holder pursuant to demand or required registration rights in favor of such
Management Holder:

                    (A) first, Securities requested to be sold by the Management
Holders requesting such registration and Registrable Securities requested to be
sold by the Institutional Investors pursuant to this Section 2.2, pro rata among
such holders on the basis of the number of shares of Common Stock requested to
be so registered by such holders; and

                    (B)  second, the number of shares of Common Stock that the
Company proposes to issue and sell for its own account.

     2.3  Registration Procedures.  The Company will use its best efforts to
          ------------------------                                          
effect each Required Registration pursuant to Section 2.1 hereof and any
Incidental Registration of any Registrable Securities as provided in Section 2.2
hereof, and to cooperate with the sale of such Registrable Securities in
accordance with the intended method of disposition thereof as quickly as
practicable, and the Company will as expeditiously as possible:

          (a)  subject, in the case of an Incidental Registration, to the
proviso to Section 2.2(a), prepare and file with the SEC the registration
statement and use its best efforts to cause the Registration to become
effective; provided, however, that
                                       7
<PAGE>
 
before filing any registration statement or prospectus or any amendments or
supplements thereto, the Company will furnish to the holders of the Registrable
Securities covered by such registration statement, their counsel, and the
underwriters, if any, and their counsel, copies of each original registration
statement proposed to be filed at least fifteen (15) days prior thereto and
copies of each amendment, prospectus and supplement at least three (3) Business
Days prior thereto, which documents will be subject to the reasonable review,
within such period, of such holders, their counsel and the underwriters; and the
Company will not file any registration statement or amendment thereto or any
prospectus or any supplement thereto (including such documents incorporated by
reference) to which the Requisite Holders shall reasonably object within such
period;

     (b)  subject, in the case of an Incidental Registration, to the proviso to
Section 2.2(a), prepare and file with the SEC such amendments and post-effective
amendments to any registration statement and any prospectus used in connection
therewith as may be necessary to keep such registration statement effective and
to comply with the provisions of the Securities Act with respect to the
disposition of all Registrable Securities covered by such registration statement
until such time as all of such Securities have been disposed of in accordance
with the intended methods of disposition by the seller or sellers thereof set
forth in such registration statement and cause the prospectus to be supplemented
by any required prospectus supplement, and as so supplemented to be filed
pursuant to Rule 424 under the Securities Act, provided that if the Company is
not then eligible to use a registration statement on Form S-3 under the
Securities Act, the Company shall not be obligated to keep such registration
statement effective for more than two (2) years after the original effective
date of such registration statement;

     (c)  furnish to each holder of Registrable Securities included in such
Registration and the underwriter or underwriters, if any, without charge, at
least one signed copy of the registration statement and any post-effective
amendment thereto, upon request, and such number of conformed copies thereof and
such number of copies of the prospectus (including each preliminary prospectus
and each prospectus filed under Rule 424 under the Securities Act), any
amendments or supplements thereto and any documents incorporated by reference
therein, as such holder or underwriter may reasonably request in order to
facilitate the disposition of the Registrable Securities being sold by such
holder (it being understood that the Company consents to the use of the
prospectus and any amendment or supplement thereto by each holder of Registrable
Securities covered by such registration statement and the underwriter or
underwriters, if any, in connection with the offering and sale of the
Registrable Securities covered by the prospectus or any amendment or supplement
thereto);

     (d)  notify each holder of the Registrable Securities of any stop order or
other order suspending the effectiveness of any registration statement, issued
or 

                                       8
<PAGE>
 
threatened by the SEC in connection therewith, and take all reasonable actions
required to prevent the entry of such stop order or to remove it or obtain
withdrawal of it at the earliest possible moment if entered;

     (e)  if requested by the managing underwriter or underwriters or any holder
of Registrable Securities in connection with any sale pursuant to a registration
statement, promptly incorporate in a prospectus supplement or post-effective
amendment such information relating to such underwriting as the managing
underwriter or underwriters or such holder reasonably requests to be included
therein; and make all required filings of such prospectus supplement or
posteffective amendment as soon as practicable after being notified of the
matters incorporated in such prospectus supplement or post-effective amendment;

     (f)  on or prior to the date on which a Registration is declared effective,
use its best efforts to register or qualify, and cooperate with the holders of
Registrable Securities included in such Registration, the underwriter or
underwriters, if any, and their counsel, in connection with the registration or
qualification of the Registrable Securities covered by such Registration for
offer and sale under the securities or "blue sky" laws of each state and other
jurisdiction of the United States as any such holder or underwriter reasonably
requests in writing; use its best efforts to keep each such registration or
qualification effective, including through new filings, or amendments or
renewals, during the period such registration statement is required to be kept
effective; and do any and all other acts or things necessary or advisable to
enable the disposition in all such jurisdictions reasonably requested of the
Registrable Securities covered by such Registration; provided, however, that the
Company will not be required to qualify generally to do business in any
jurisdiction where it is not then so qualified or to take any action which would
subject it to general service of process in any such jurisdiction where it is
not then so subject;

     (g)  in connection with any sale pursuant to a Registration, cooperate with
the holders of Registrable Securities and the managing underwriter or
underwriters, if any, to facilitate the timely preparation and delivery of
certificates (not bearing any restrictive legends) representing Securities to be
sold under such Registration, and enable such Securities to be in such
denominations and registered in such names as the managing underwriter or
underwriters, if any, or such holders may request;

     (h)  use its best efforts to cause the Registrable Securities to be
registered with or approved by such other governmental agencies or authorities
within the United States and having jurisdiction over the Company or any
Subsidiary as may reasonably be necessary to enable the seller or sellers
thereof or the underwriter or underwriters, if any, to consummate the
disposition of such Securities;

                                       9
<PAGE>
 
     (i)  make available for inspection by any holder of Registrable Securities
included in any Registration, any underwriter participating in any disposition
pursuant to any Registration, and any attorney, accountant or other agent
retained by any such seller or underwriter, all financial and other records,
pertinent corporate documents and properties of the Company, as shall be
reasonably necessary to enable them to exercise their due diligence
responsibility, and cause the Company's officers, directors and employees to
supply all information reasonably requested by any such Person in connection
with such Registration;

     (j)  use its best efforts to obtain:

          (i)    at the time of effectiveness of each Registration, a "comfort
letter" from the Company's independent certified public accountants covering
such matters of the type customarily covered by "cold comfort letters" as the
Requisite Holders and the underwriters reasonably request; and

          (ii)   at the time of any underwritten sale pursuant to the
registration statement, a "bring-down comfort letter," dated as of the date of
such sale, from the Company's independent certified public accountants covering
such matters of the type customarily covered by comfort letters as the Requisite
Holders and the underwriters reasonably request;

     (k)  use its best efforts to obtain, at the time of effectiveness of each
Incidental Registration and at the time of any sale pursuant to each
Registration, an opinion or opinions, favorable to the Requisite Holders in form
and scope, from counsel for the Company in customary form;

     (l)  notify each seller of Registrable Securities covered by such
Registration, upon discovery that, or upon the happening of any event as a
result of which, the prospectus included in such Registration, as then in
effect, includes an untrue statement of a material fact or omits to state any
material fact required to be stated therein or necessary to make the statements
therein not misleading, and promptly prepare, file with the SEC and furnish to
such seller or holder a reasonable number of copies of a supplement to or an
amendment of such prospectus as may be necessary so that, as thereafter
delivered to the purchasers or prospective purchasers of such Securities, such
prospectus shall not include an untrue statement of a material fact or omit to
state a material fact required to be stated therein or necessary to make the
statements therein not misleading in the light of the circumstances under which
they are made;

     (m)  otherwise comply with all applicable rules and regulations of the SEC,
and make generally available to its security holders (as contemplated by Section
11(a) under the Securities Act) an earnings statement satisfying the 

                                       10
<PAGE>

 
provisions of Rule 158 under the Securities Act not later than ninety (90) days
after the end of the twelve (12) month period beginning with the first month of
the Company's first fiscal quarter commencing after the effective date of the
registration statement, which statement shall cover said twelve (12) month
period;

          (n)  provide and cause to be maintained a transfer agent and registrar
for all Registrable Securities covered by each Registration from and after a
date not later than the effective date of such Registration;

          (o)  use its best efforts to cause all Registrable Securities covered
by each Registration to be listed subject to notice of issuance, prior to the
date of first sale of such Registrable Securities pursuant to such Registration,
on each securities exchange on which the Common Stock issued by the Company is
then listed, and admitted to trading on NASDAQ, if the Common Stock or any such
other Securities are then admitted to trading on NASDAQ; and

          (p)  enter into such agreements (including underwriting agreements in
customary form) and take such other actions as the Requisite Holders shall
reasonably request in order to expedite or facilitate the disposition of such
Registrable Securities.

The Company may require each holder of Registrable Securities that will be
included in such Registration to furnish the Company with such information in
respect of such holder of its Registrable Securities that will be included in
such Registration as the Company may reasonably request in writing and as is
required by applicable laws or regulations.

     2.4  Preparation; Reasonable Investigation.  In connection with the
          --------------------------------------                        
preparation and filing of each registration statement registering Registrable
Securities under the Securities Act, the Company will give the holders of such
Registrable Securities so registered, their underwriters, if any, and their
respective counsel and accountants the opportunity to participate in the
preparation of such registration statement (other than reports and proxy
statements incorporated therein by reference and lawfully and properly filed
with the SEC) and each prospectus included therein or filed with the SEC, and
each amendment thereof or supplement thereto, and will give each of them such
access to its books and records and such opportunities to discuss the business
of the Company with its officers and the independent public accountants who have
certified its financial statements as shall be necessary, in the opinion of such
holders or such underwriters to conduct a reasonable investigation within the
meaning of the Section 11 (b)(3) of the Securities Act.

     2.5  Rights of Requesting Holders.  Each holder of Registrable Securities
          -----------------------------                                       
which makes a written request therefor within thirty (30) days after the 

                                       11
<PAGE>

 
notice to such holders provided for in Section 2.1 or Section 2.2 hereof, as the
case may be, hereof, shall have the right to receive the copies of the
information, notices and other documents described in Section 2.3(c), Section
2.3(l) and Section 2.3(m) hereof in connection with any proposed Registration by
the Company under the Securities Act.

     2.6  Registration Expenses.  The Company will pay all Registration Expenses
          ----------------------                                                
in connection with each registration of Registrable Securities, including,
without limitation, any such registration not effected by the Company.

     2.7  Indemnification; Contribution.
          ------------------------------

          (a)  Indemnification by the Company. The Company shall indemnify, to
               ------------------------------
the fullest extent permitted by law, each holder of Registrable Securities, its
officers, directors and agents, if any, and each Person, if any, who controls
such holder within the meaning of Section 15 of the Securities Act, against all
losses, claims, damages, liabilities (or proceedings in respect thereof) and
expenses (under the Securities Act or common law or otherwise), joint or
several, resulting from any violation by the Company of the provisions of the
Securities Act or any untrue statement or alleged untrue statement of a material
fact contained in any registration statement or prospectus (and as amended or
supplemented if amended or supplemented) or any preliminary prospectus or caused
by any omission or alleged omission to state therein a material fact required to
be stated therein or necessary to make the statements therein (in the case of
any prospectus, in light of the circumstances under which they were made) not
misleading, except to the extent that such losses, claims, damages, liabilities
(or proceedings in respect thereof) or expenses are caused by any untrue
statement or alleged untrue statement contained in or by any omission or alleged
omission from information concerning any holder furnished in writing to the
Company by such holder expressly for use therein. If the offering pursuant to
any registration statement provided for under this Section 2 is made through
underwriters, no action or failure to act on the part of such underwriters
(whether or not such underwriter is an affiliate of any holder of Registrable
Securities) shall affect the obligations of the Company to indemnify any holder
of Registrable Securities or any other Person pursuant to the preceding
sentence. If the offering pursuant to any registration statement provided for
under this Section 2 is made through underwriters, the Company agrees, to the
extent required by such underwriters, to enter into an underwriting agreement in
customary form with such underwriters and to indemnify such underwriters, their
officers, directors and agents, if any, and each Person, if any, who controls
such underwriters within the meaning
                                       12
<PAGE>
 
of Section 15 of the Securities Act to the same extent as hereinbefore provided
with respect to the indemnification of the holders of Registrable Securities;
provided that the Company shall not be required to indemnify any such
underwriter, or any officer or director of such underwriter or any Person who
controls such underwriter within the meaning of Section 15 of the Securities
Act, to the extent that the loss, claim, damage, liability (or proceedings in
respect thereof) or expense for which indemnification is claimed results from
such underwriter's failure to send or give a copy of an amended or supplemented
final prospectus to the Person asserting an untrue statement or alleged untrue
statement or omission or alleged omission at or prior to the written
confirmation of the sale of Registrable Securities to such Person if such
statement or omission was corrected in such amended or supplemented final
prospectus prior to such written confirmation and the underwriter was provided
with such amended or supplemented final prospectus.

     (b) Indemnification by the Holders.  In connection with any registration
         -------------------------------                                     
statement in which a holder of Registrable Securities is participating, each
such holder, severally and not jointly, shall indemnify, to the fullest extent
permitted by law, the Company, each underwriter and their respective officers,
directors and agents, if any, and each Person, if any, who controls the Company
or such underwriter within the meaning of Section 15 of the Securities Act,
against any losses, claims, damages, liabilities (or proceedings in respect
thereof) and expenses resulting from any untrue statement or alleged untrue
statement of a material fact or any omission or alleged omission of a material
fact required to be stated in the registration statement or prospectus or
preliminary prospectus or any amendment thereof or supplement thereto or
necessary to make the statements therein (in the case of any prospectus, in
light of the circumstances under which they were made) not misleading, but only
to the extent that such untrue statement is contained in or such omission is
from information so concerning a holder furnished in writing by such holder
expressly for use therein; provided, however, that such holder's obligations
hereunder shall be limited to an amount equal to the proceeds to such holder of
the Registrable Securities sold pursuant to such registration statement.

     (c)  Control of Defense.  Any Person entitled to indemnification under the
          -------------------                                                  
provisions of this Section 2.7 shall give prompt notice to the indemnifying
party of any claim with respect to which it seeks indemnification and unless in
such indemnified party's reasonable judgment a conflict of interest between such
indemnified and indemnifying parties may exist in respect of such claim, permit
such indemnifying party to assume the defense of such claim, with counsel
reasonably satisfactory to the indemnified party; and if such defense is so
assumed, such indemnifying party shall not enter into any settlement without the
consent of the indemnified party if such settlement attributes liability to the
indemnified party and such indemnifying party shall not be subject to any
liability for any settlement made without its consent (which shall not be
unreasonably withheld); and any underwriting agreement entered into with respect
to any registration statement provided for under this Section 2 shall so
provide.  In the event an indemnifying party shall not be entitled, or elects
not, to assume the defense of a claim, such indemnifying party shall not be
obligated to pay the fees and expenses 

                                       13
<PAGE>
 
of more than one counsel or firm of counsel for all parties indemnified by such
indemnifying party in respect of such claim, unless in the reasonable judgment
of any such indemnified party a conflict of interest may exist between such
indemnified party and any other of such indemnified parties in respect to such
claim.

     (d)  Contribution.  If for any reason the foregoing indemnity is
          -------------                                              
unavailable, then the indemnifying party shall contribute to the amount paid or
payable by the indemnified party as a result of such losses, claims, damages,
liabilities or expenses:

          (i)   in such proportion as is appropriate to reflect the relative
benefits received by the indemnifying party on the one hand and the indemnified
party on the other; or

          (ii)  if the allocation provided by clause (i) above is not permitted
by applicable law or provides a lesser sum to the indemnified party than the
amount hereinafter calculated, in such proportion as is appropriate to reflect
not only the relative benefits received by the indemnifying party on the one
hand and the indemnified party on the other but also the relative fault of the
indemnifying party and the indemnified party as well as any other relevant
equitable considerations.

Notwithstanding the foregoing, no holder of Registrable Securities shall be
required to contribute any amount in excess of the amount such holder would have
been required to pay to an indemnified party if the indemnity under Section
2.7(b) hereof was available.  No Person guilty of fraudulent misrepresentation
(within the meaning of Section 11(f) of the Securities Act) shall be entitled to
contribution from any Person who was not guilty of such fraudulent
misrepresentation.  The obligation of any Person to contribute pursuant to this
Section 2.7 shall be several and not joint.

     (e)  Timing of Payments.  An indemnifying party shall make payments of all
          -------------------                                                  
amounts required to be made pursuant to the foregoing provisions of this Section
2.7 to or for the account of the indemnified party from time to time promptly
upon receipt of bills or invoices relating thereto or when otherwise due or
payable.

     (f)  Survival.  The indemnity and contribution agreements contained in this
          ---------                                                             
Section 2.7 shall remain in full force and effect regardless of any
investigation made by or on behalf of a participating holder of Registrable
Securities, its officers, directors, agents or any Person, if any, who controls
such holder as aforesaid, and shall survive the transfer of such Securities by
such holder.

                                       14
<PAGE>

 
     2.8  Holdback Agreements; Registration Rights to Others.
          ---------------------------------------------------

          (a)  In connection with each underwritten sale of Registrable
Securities, the Company agrees, and each holder of Registrable Securities by
acquisition of such Registrable Securities agrees, to enter into customary
holdback agreements concerning sale or distribution of Registrable Securities
and other equity Securities of the Company, except, in the case of any holder of
Registrable Securities, to the extent that such holder is prohibited by
applicable law or exercise of fiduciary duties from agreeing to withhold
Registrable Securities from sale or is acting in its capacity as a fiduciary or
investment adviser. Without limiting the scope of the term "fiduciary," a holder
shall be deemed to be acting as a fiduciary or an investment adviser if its
actions or the Registrable Securities proposed to be sold are subject to the
Employee Retirement Income Security Act of 1974, as amended, or the Investment
Company Act of 1940, as amended, or if such Registrable Securities are held in a
separate account under applicable insurance law or regulation.

          (b)  If the Company shall at any time after the date hereof provide to
any holder of any Securities of the Company rights with respect to the
registration of such Securities under the Securities Act:

               (i)  such rights shall not be in conflict with or adversely
affect any of the rights provided in this Section 2 to the holders of
Registrable Securities; and

              (ii)  if such rights are provided on terms or conditions more
favorable to such holder than the terms and conditions provided in this Section
2, the Company will provide (by way of amendment to this Agreement or otherwise)
such more favorable terms or conditions to the holders of Registrable
Securities.

     2.9  Availability of Information.  The Company will comply with the
          ----------------------------                                  
reporting requirements of Sections 13 and 15(d) of the Exchange Act and will
comply with all other public information reporting requirements of the SEC as
from time to time in effect, and cooperate with the holders of Registrable
Securities, so as to permit disposition of the Registrable Securities pursuant
to an exemption from the Securities Act for the sale of any Registrable
Securities (including, without limitation, the current public information
requirements of Rule 144(c) and Rule 144A under the Securities Act).  The
Company will also cooperate with each holder of any Registrable Securities in
supplying such information as may be necessary for such holder to complete and
file any information reporting forms presently or hereafter required by the SEC
as a condition to the availability of an exemption from the Securities Act for
the sale of any Registrable Securities.

                                       15
<PAGE>
 
     3.   Miscellaneous.
          ------------- 

          3.1  Binding Effect.  The provisions of this Agreement shall be 
               ---------------  
binding upon and inure to the benefit of parties hereto and their respective
successors and assigns.

          3.2  Notices.  All written communications provided for hereunder shall
               -------
be binding overnight delivery service (with charges prepaid), or by facsimile,
delivery confirmed with a copy by first class mail or overnight courier (with
charges prepaid), and:

               (a)  if to the Company:

                    Trex Company, Inc.
                    20 South Cameron Street
                    Winchester, VA 22601
                    Fax: (540) 678-0886
                    Attention:  Anthony J. Cavanna
                  
                    with a copy (which shall not constitute notice) to:

                    Hogan & Hartson L.L.P.
                    555 13th Street, NW
                    Washington, D.C.  20004
                    Fax: 202-637-5910
                    Attention:  Richard J. Parrino, Esq.

or such other address as the Company shall designate to each Institutional
Investor in writing;

               (b) if to any Institutional Investor, at the address set forth on
Schedule A hereto for each such Institutional Investor or such other address as
- -------- -
an Institutional Investor shall designate to the Company in writing; and

               (c) if to any Management Holder, at the address set forth on
Schedule B hereto for each such Management Holder or such other address as a
- -------- -
Management Holder shall designate to the Company in writing.

          3.3  Amendments and Waivers.  The provisions of this Agreement,
               ----------------------
including the provisions of this sentence, may be amended, modified or
supplemented only by a writing duly executed by or on behalf of the
Institutional Investors holding at least sixty-six and two-thirds percent (66-
2/3%) of the Registrable Securities held by the Institutional Investors at such
time and the Company; provided, however, that compliance by the Company with the
provisions
                                       16
<PAGE>
 
of this Agreement, with respect to any particular registration, may be waived by
such Institutional Investors holding at least sixty-six and two-thirds percent
(66-2/3%) of the Registrable Securities held by the Institutional Investors at
such time; and provided, further, that no amendment, modification or supplement
of the provisions of Section 2.1(d) or 2.2(c) hereof which adversely affects the
rights of any Management Holder shall be made without the consent of such
Management Holder.

     3.4  Availability of Information.  At any time that any class of the Common
          ----------------------------                                          
Stock is registered under section 12(b) or section 12(g) of the Exchange Act,
the Company will comply with the reporting requirements of Sections 13 and 15(d)
of the Exchange Act (whether or not it shall be required to do so pursuant to
such sections) and will comply with all other public information reporting
requirements of the SEC from time to time in effect.  In addition, the Company
shall file such reports and information, and shall make available to the public
and to the Institutional Investors such information, as shall be necessary to
permit such holders to offer and sell shares of Common Stock pursuant to the
provisions of Rules 144 and 144A promulgated under the Securities Act.  The
Company will also cooperate with each such holder in supplying such information
as may be necessary for such holder to complete and file any information
reporting forms presently or hereafter required by the SEC as a condition to the
availability of an exemption from the registration provisions of the Securities
Act in connection with the sale of any shares of Common Stock.  The Company will
furnish to each such holder, promptly upon their becoming available, copies of
all financial statements, reports, notices and proxy statements sent or made
available generally by the Company to its holders of equity securities, and
copies of all regular and periodic reports and all registration statements and
prospectuses filed by the Company with any securities exchange or with the SEC.

     3.5  GOVERNING LAW.  THIS AGREEMENT SHALL BE CONSTRUED AND ENFORCED IN
          --------------                                                   
ACCORDANCE WITH, AND THE RIGHTS OF THE PARTIES SHALL BE GOVERNED BY, THE
INTERNAL LAW OF THE STATE OF NEW YORK.

     3.6  JURISDICTION; JURY TRIAL.  EACH OF THE PARTIES HERETO IRREVOCABLY
          -------------------------                                        
SUBMITS TO THE NON-EXCLUSIVE JURISDICTION OF ANY UNITED STATES FEDERAL OR NEW
YORK STATE COURT IN ANY ACTION OR PROCEEDING ARISING OUT OF OR RELATING TO THIS
AGREEMENT OR ANY OF THE OTHER DOCUMENTS AND INSTRUMENTS CONTEMPLATED HEREBY AND
EACH OF THE PARTIES HERETO HEREBY IRREVOCABLY AGREES THAT ALL CLAIMS IN RESPECT
OF SUCH ACTION OR PROCEEDING MAY BE HEARD AND DETERMINED IN ANY SUCH COURT.
NONE OF THE PARTIES HERETO SHALL SEEK A JURY TRIAL IN ANY LAWSUIT, PROCEEDING,
COUNTERCLAIM OR OTHER LITIGATION ARISING OUT OF OR OTHERWISE RELATED TO THIS
AGREEMENT AND EACH OF THE PARTIES HERETO WAIVES ANY AND ALL RIGHT TO ANY SUCH
JURY TRIAL AND ANY RIGHT EACH MAY HAVE TO ASSERT THE DOCTRINE OF FORUM NON
CONVENIENS OR TO OBJECT TO 

                                       17
<PAGE>
 
VENUE TO THE EXTENT ANY SUCH PROCEEDING IS BROUGHT IN ACCORDANCE WITH THIS
SECTION 3.6.

     3.7  Counterparts.  This Agreement may be executed in any number of
          -------------                                                 
counterparts and each of such counterparts shall for all purposes be deemed to
be an original, and all such counterparts shall together constitute but one and
the same instrument.

     3.8  Descriptive Headings.  Descriptive headings of the several sections of
          ---------------------                                                 
this Agreement are inserted for convenience only and shall not control or affect
the meaning or construction of any of the provisions hereof.

     3.9  Severability.  The fact that any given provisions of this Agreement is
          -------------                                                         
found to be unenforceable, void or voidable under applicable laws of any
jurisdiction shall not affect the validity of the remaining provisions of this
Agreement in such jurisdiction, and shall not affect the enforceability of the
entire Agreement under the laws of any other jurisdiction.

     3.10  Effective Date.  This Agreement shall be effective as of the date of
           --------------                                                      
termination of the Members' Agreement.



                  [Remainder of page intentionally left blank]

                                       18
<PAGE>
 
IN WITNESS WHEREOF, the parties, each by its duly authorized signatory, have
executed this Agreement as of the date first above written.


                       TREX COMPANY, INC.

                       By  /s/ Robert G. Matheny
                           ---------------------
                       Name:  Robert G. Matheny
                       Title: President


                       CONNECTICUT GENERAL LIFE INSURANCE COMPANY, on behalf of
                       one or more separate accounts

                       By:  CIGNA Investments, Inc., authorized agent

                       By  /s/ James R. Kuzemchak
                           ----------------------
                       Name:  James R. Kuzemchak
                       Title: Managing Director


                       CONNECTICUT GENERAL LIFE INSURANCE COMPANY

                       By:  CIGNA Investments, Inc., authorized agent

                       By  /s/ James R. Kuzemchak
                           ----------------------
                       Name:  James R. Kuzemchak
                       Title: Managing Director


                       LIFE INSURANCE COMPANY OF NORTH AMERICA

                       By:  CIGNA Investments, Inc., authorized agent

                       By  /s/ James R. Kuzemchak
                           ----------------------
                       Name:  James R. Kuzemchak
                       Title: Managing Director

                                       19
<PAGE>
 
                       THE LINCOLN NATIONAL LIFE INSURANCE COMPANY


                       By Lincoln Investment Management Company, its Attorney-
                       in-Fact

                       By  /s/ R. Scott Krafft
                           -------------------
                       Name:  R. Scott Krafft
                       Title: Second Vice President



                       /s/ Anthony J. Cavanna
                       ----------------------
                       Anthony J. Cavanna



                       /s/ Roger A. Wittenberg
                       -----------------------
                       Roger A. Wittenberg



                       /s/ Robert G. Matheny
                       ---------------------
                       Robert G. Matheny



                       /s/ Andrew U. Ferrari
                       ---------------------
                       Andrew U. Ferrari

                                       20
<PAGE>
 
                       CIG & CO.

                       By  /s/ James R. Kuzemchak
                           ----------------------
                       Name:  James R. Kuzemchak
                       Title: Partner

                                       21
<PAGE>
 
                                   SCHEDULE A

                 NAMES AND ADDRESSES OF INSTITUTIONAL INVESTORS
                                        
CIG & CO.

Address:  c/o CIGNA Investments, Inc.
          900 Cottage Grove Road
          Hartford, Connecticut 06152-2307
          Attention: Private Securities Division S-307
          Fax: 860-726-7203


CONNECTICUT GENERAL LIFE INSURANCE COMPANY:

Address:  900 Cottage Grove Road
          Hartford, Connecticut 06152-2307
          Attention: Private Securities Division S-307
          Fax: 860-726-7203


CONNECTICUT GENERAL LIFE INSURANCE COMPANY, on behalf of one or more separate
accounts:

Address:  c/o CIGNA Investments, Inc.
          900 Cottage Grove Road
          Hartford, Connecticut 06152-2307
          Attention: Private Securities Division S-307
          Fax: 860-726-7203


LIFE INSURANCE COMPANY OF NORTH AMERICA:

Address:  c/o CIGNA Investments, Inc.
          900 Cottage Grove Road
          Hartford, Connecticut 06152-2307
          Attention: Private Securities Division S-307
          Fax: 860-726-7203

                                       
<PAGE>
 
THE LINCOLN NATIONAL LIFE INSURANCE COMPANY:

Address:  200 East Berry Street
          Renaissance Square
          Fort Wayne, Indiana 46802

                                       
<PAGE>
 
                                   SCHEDULE B

                   NAMES AND ADDRESSES OF MANAGEMENT HOLDERS


ANTHONY J. CAVANNA

Address:  c/o Trex Company, Inc.
          20 South Cameron Street
          Winchester, Virginia  22601
          Fax:  540-678-0886


ROGER A. WITTENBERG

Address:  c/o Trex Company, Inc.
          20 South Cameron Street
          Winchester, Virginia  22601
          Fax:  540-678-0886


ROBERT G. MATHENY

Address:  c/o Trex Company, Inc.
          20 South Cameron Street
          Winchester, Virginia  22601
          Fax:  540-678-0886


ANDREW U. FERRARI

Address:  c/o Trex Company, Inc.
          20 South Cameron Street
          Winchester, Virginia  22601
          Fax:  540-678-0886

                                       

<PAGE>

                                                                    EXHIBIT 10.3

                              TREX COMPANY, INC.

                              1999 INCENTIVE PLAN
                             FOR OUTSIDE DIRECTORS
                                        
<PAGE>

                               TABLE OF CONTENTS


<TABLE>
                                                                                                         Page
                                                                                                         ----
<S><C>                                                                                                   <C>
1. DEFINITIONS............................................................................................ 1
2. PURPOSE................................................................................................ 2
3. SHARES SUBJECT TO THE PLAN............................................................................. 2
4. ANNUAL DIRECTOR FEES................................................................................... 3
   4.1. General........................................................................................... 3
   4.2. Form of Annual Fee................................................................................ 3
   4.3. Valuation of Options.............................................................................. 3
5. GRANT DATE............................................................................................. 3
6. OPTION PRICE........................................................................................... 3
7. TERM OF OPTIONS........................................................................................ 3
8. VESTING OF OPTIONS..................................................................................... 3
9. SERVICE TERMINATION.................................................................................... 4
10. RIGHTS IN THE EVENT OF DEATH OR DISABILITY............................................................ 4
   10.1. Death............................................................................................ 4
   10.2. Disability....................................................................................... 4
11. ELECTION TO RECEIVE ADDITIONAL OPTIONS................................................................ 5
   11.1. Election Form.................................................................................... 5
   11.2. Time for Filing Election Form.................................................................... 5
   11.3. Modification of the Election Form................................................................ 5
12. ADMINISTRATION........................................................................................ 5
   12.1. Committee........................................................................................ 5
   12.2. Rules for Administration......................................................................... 5
   12.3. Committee Action................................................................................. 6
   12.4. Delegation....................................................................................... 6
   12.5. Services......................................................................................... 6
   12.6. Indemnification.................................................................................. 6
13. AMENDMENT AND TERMINATION ............................................................................ 6
14. GENERAL PROVISIONS.................................................................................... 6
   14.1. Limitation of Rights............................................................................. 6
   14.2. No Rights as Stockholders........................................................................ 7
   14.3. Rights as a Non-Employee Director................................................................ 7
   14.4. Assignment, Pledge or Encumbrance................................................................ 7
   14.5. Binding Provisions............................................................................... 7
   14.6. Notices.......................................................................................... 7
   14.7. Governing Law.................................................................................... 7
   14.8. Withholding...................................................................................... 7
   14.9. Effective Date................................................................................... 8
</TABLE>

                                      -i-
<PAGE>
 
1.   DEFINITIONS
    
           To the extent any capitalized words used in this Plan are not
defined, they shall have the definitions stated for them in the Trex Company,
Inc. 1999 Stock Option and Incentive Plan

1.1  "Annual Director Fee" means an annual fee earned by an Eligible Director
      -------------------                                                    
     for service on the Board of Directors.

1.2  "Board of Directors" or "Board" means the Board of Directors of the
      ------------------      -----                                     
Company.

1.3  "Committee" means the Administrative Committee which administers the Plan.
      ---------                                                                

1.4  "Common Stock" means the common stock, par value $0.01 per share, of the
      ------------                                                           
     Company.

1.5  "Company" means Trex Company, Inc., a Delaware corporation, or any
      -------                                                          
     successor thereto.

1.6  "Election Form" means the form used by an Eligible Director to elect to
      -------------                                                         
     receive all or a portion of his Annual Director Fee for a Plan Year in the
     form of Options.

1.7  "Eligible Director" for each Plan Year means a member of the Board of
      -----------------                                                   
     Directors who is not an employee of the Company or any Subsidiary.

1.8  "Fair Market Value" means the closing price of a share of Common Stock
      -----------------                                                    
     reported on the New York Stock Exchange (the "NYSE") on the date Fair
     Market Value is being determined, provided that if there is no closing
     price reported on such date, the Fair Market Value of a share of Common
     Stock on such date shall be deemed equal to the closing price as reported
     by the NYSE for the last preceding date on which sales of shares of Common
     Stock were reported.  Notwithstanding the foregoing, in the event that the
     shares of Common Stock are listed upon more than one established stock
     exchange, "Fair Market Value" means the closing price of the shares of
     Common Stock reported on the exchange that trades the largest volume of
     shares of Common Stock on the date Fair Market Value is being determined.
     If the Common Stock is not at the time listed or admitted to trading on a
     stock exchange, Fair Market Value means the mean between the lowest
     reported bid price and highest reported asked price of the Common Stock on
     the date in question in the over-the-counter market, as such prices are
     reported in a publication of general circulation selected by the Board and
     regularly reporting the market price of Common Stock in such market.  If
     the Common Stock is not listed or admitted to trading on any stock exchange
     or traded in 

                                       1
<PAGE>
 
     the over-the-counter market, Fair Market Value shall be as determined in 
     good faith by the Board.

1.9  "Grant Date" has the meaning set forth in Section 5 hereof.
      ----------                                                

1.10 "Option" means a non-qualified Option granted pursuant to the Trex Company,
      ------                                                                    
     Inc. 1999 Stock Option and Incentive Plan.

1.11 "Option Agreement" means the written agreement between the Company and the
      ----------------                                                         
     Participant that evidences and sets out the terms and conditions of the
     Option.

1.12 "Option Price" has the meaning set forth in Section 6 hereof.
      ------------                                                

1.13 "Participant" for any Plan Year means an Eligible Director who participates
      -----------                                                               
     in the Plan for that Plan Year in accordance with Section 11.1 hereof.

1.14 "Plan" means the Trex Company, Inc. 1999 Incentive Plan for Outside
      ----                                                              
     Directors as set forth herein and as amended from time to time.

1.15 "Plan Year" means each fiscal year of the Company.
      ---------                                        

1.16 "Subsidiary" means any "subsidiary corporation" of the Company within the
      ----------                                                              
     meaning of Section 424(f) of the Internal Revenue Code of 1986, as amended.

2.   PURPOSE

           The purpose of the Plan is to provide an incentive for Eligible
Directors to increase their equity holdings in the Company so that the financial
interests of the Eligible Directors shall be more closely aligned with the
financial interests of the Company's stockholders.

3.   SHARES SUBJECT TO THE PLAN
          
           The shares of Common Stock issuable under the Plan shall be issued
pursuant to the Trex Company, Inc. 1999 Stock Option and Incentive Plan.


4.  ANNUAL DIRECTOR FEES

    4.1.  General

           Each Eligible Director shall be entitled to an Annual Director Fee
which is equal in value to twenty-five thousand dollars ($25,000); provided,
                                                                   -------- 
however, that such Annual Director Fee may be adjusted by the Board.  The Cash
- -------                                                                       
Portion of the Annual Director Fee as defined in Section 4.2 hereof (after
reduction 

                                       

                                       2
<PAGE>
 
pursuant to Section 4.2 hereof) shall be paid to an Eligible Director
in four equal quarterly installments in arrears on the first business day of
each quarter of the Plan Year in which the Eligible Director is providing
services to the Company.

    4.2. Form of Annual Fee

          The Annual Director Fee shall be paid in the form of: (i)  an Option
representing fifty percent (50%) of the value of the Annual Director Fee and
(ii)  cash representing fifty percent (50%) of the value of the Annual Director
Fee (the "Cash Portion of the Annual Director's Fee"); provided, however, that
                                                       --------  -------      
pursuant to Section 11 hereof, the Eligible Director may elect to receive all or
a portion of the Cash Portion of the Annual Director's Fee in the form of an
Option of equal value.

    4.3. Valuation of Options

          The value of all Options to be issued under the Plan shall be
determined pursuant to the Black-Scholes stock option valuation model.

5.   GRANT DATE

          The date of grant for Options granted under the Plan (the "Grant
Date") shall be the first day of the Plan Year.

6.   OPTION PRICE
    
          The Option Price of the Common Stock covered by each Option granted
under the Plan shall be the Fair Market Value of such Common Stock on the Grant
Date.

7.   TERM OF OPTIONS

          Each Option granted under the Plan shall terminate, and all rights to
purchase shares of Common Stock thereunder shall cease, upon the expiration of
ten years from the date such Option is granted.

8.   VESTING OF OPTIONS

          The Eligible Director may exercise the Option at any time and from
time to time after the Grant Date and prior to termination of the Option in
installments as follows:  on the first anniversary of the Grant Date, the Option
shall be exercisable in respect of twenty five percent (25%) of the number of
shares covered by the grant, and on each of the next three anniversaries of the
Grant Date, the Option shall be exercisable in respect of an additional twenty
five percent (25%) of the number of shares covered by the grant.  Any limitation
on the exercise of an Option contained in any Option Agreement may be rescinded,
modified or waived by the Committee, in its sole discretion, at any time and
from time to time after the date of grant of such Option.  The foregoing
installments, to the extent not 

                                       3
<PAGE>
 
exercised, shall accumulate and be exercisable, in whole or in part, at any time
and from time to time, after becoming exercisable and prior to the termination
of the Option; provided, that no single exercise of the Option shall be for less
               --------
than 100 shares, unless the number of shares purchased is the total number at
the time available for purchase under the Option.

9.  SERVICE TERMINATION

          Except as otherwise provided in the Option Agreement, upon the
termination of service (a "Service Termination") of the Participant as a
director of the Company, other than by reason of the death or permanent and
total disability of such Participant, any Option granted to a Participant
pursuant to the Plan shall terminate to the extent unvested and the vested
portion of the Option shall terminate ninety (90) days after such Service
Termination, and such Participant shall have no further right to purchase shares
of Common Stock pursuant to such Option.

10. RIGHTS IN THE EVENT OF DEATH OR DISABILITY

    10.1.  Death

          If a Participant dies while in service as a director of the Company,
the executors or administrators or legatees or distributees of such
Participant's estate shall have the right at any time within one year after the
date of such Participant's death and prior to termination of the Option pursuant
to Section 7 hereof, to exercise any Option held by such Participant at the date
of such Participant's death whether or not such Option was exercisable
immediately prior to such Optionee's death.

     10.2. Disability

          If there is a Service Termination by reason of the permanent and total
disability of the Participant, then such Participant shall have the right at any
time within one year after such Service Termination and prior to termination of
the Option pursuant to Section 7 hereof, to exercise, in whole or in part, any
Option held by such Participant at the date of such Service Termination whether
or not such Option was exercisable immediately prior to such Optionee's Service
Termination.  Whether a Service Termination is to be considered by reason of
permanent and total disability for purposes of this Plan shall be determined by
the Committee, which determination shall be final and conclusive.

                                       4
<PAGE>
 
11.  ELECTION TO RECEIVE ADDITIONAL OPTIONS

     11.1. Election Form

           A Participant who wishes to be receive all or part of the Cash
Portion of the Annual Director Fee in the form of Options shall file an Election
Form with the Company, in the form and manner prescribed by the Committee.
Filing of a completed Election Form will authorize the Company to issue Options
to the Participant in lieu of all or part of the Cash Portion of the Annual
Director Fee, in accordance with the Participant's instructions on the Election
Form. Options issued pursuant to an election made under this Section 11 shall
vest in accordance with the schedule set forth in Section 8 hereof.

     11.2. Time for Filing Election Form

           An Election Form shall be completed and filed by each newly elected
Eligible Director within thirty (30) days after the Participant's election to
the Board, and elections under the Plan made by newly elected Eligible Directors
shall apply to the Participant's Annual Director Fee for the remainder of the
Plan Year. Continuing Directors shall complete an Election Form prior to the
last day of the Plan Year for an Annual Director Fee earned in the next
succeeding Plan Year.

     11.3. Modification of the Election Form

           An election made by an Eligible Director pursuant to Section 11.1
hereof shall be irrevocable for the Plan Year for which such election is made.

12.  ADMINISTRATION

     12.1. Committee

           The general administration of the Plan and the responsibility for
carrying out its provisions shall be placed in an Administrative Committee.  The
Committee shall consist of at least two members appointed from time to time by
the Board of Directors to serve at the pleasure thereof.  The initial
Administrative Committee shall consist of the President and the Chief Financial
Officer of the Company.  Any member of the Committee may resign by delivering a
written resignation to the Company, and may be removed at any time by action of
the Board of Directors.

     12.2. Rules for Administration

           Subject to the limitations of the Plan, the Committee may from time
to time establish such rules and procedures for the administration and
interpretation of the Plan and the transaction of its business as the Committee
may deem necessary or appropriate. The determination of the Committee as to any
disputed 

                                       5
<PAGE>
 
question relating to the administration and interpretation of the Plan shall be
conclusive.

     12.3. Committee Action

           Any act which the Plan authorizes or requires the Committee to do may
be done by a majority of its members.  The action of such majority, expressed
from time to time by a vote at a meeting (i) in person, (ii) by telephone or
other means by which all members can hear one another or (iii) in writing
without a meeting shall constitute the action of the Committee and shall have
the same effect for all purposes as if assented to by all members of the
Committee at the time in office.

     12.4. Delegation

           The members of the Committee may authorize one or more of their
number to execute or deliver any instrument, make any payment or perform any
other act which the Plan authorizes or requires the Committee to do.

     12.5. Services
           
           The Committee may employ or retain agents to perform such clerical,
accounting and other services as it may require in carrying out the provisions
of the Plan.

     12.6. Indemnification

           The Company shall indemnify and save harmless each member of the
Committee against all expenses and liabilities arising out of membership on the
Committee, other than expenses and liabilities arising from the such member's
own gross negligence or willful misconduct, as determined by the Board of
Directors.

13.  AMENDMENT AND TERMINATION

           The Company, by action of the Board of Directors or the
Administrative Committee, may at any time or from time to time modify or amend
any or all of the provisions of the Plan, or may at any time terminate the Plan.
No such action shall adversely affect the accrued rights of any Participant
hereunder without the Participant's consent thereto.

14.  GENERAL PROVISIONS

     14.1. Limitation of Rights
          
           No Participant shall have any right to any payment or benefit
hereunder except to the extent provided in the Plan.

                                       6
<PAGE>
 
     14.2. No Rights as Stockholders
          
           Nothing contained in this Plan shall be construed as giving any
Participant rights as a stockholder of the Company.

     14.3. Rights as a Non-Employee Director

           Nothing contained in this Plan shall be construed as giving any
Participant a right to be retained as a non-employee director of the Company.

     14.4. Assignment, Pledge or Encumbrance

           No assignment, pledge or other encumbrance of any payments or
benefits under the Plan shall be permitted or recognized and, to the extent
permitted by law, no such payments or benefits shall be subject to legal process
or attachment for the payment of any claim of any person entitled to receive the
same, except to the extent such assignment, pledge or other encumbrance is in
favor of the Company to secure a loan or other extension of credit from the
Company to the Participant.

     14.5. Binding Provisions

           The provisions of this Plan shall be binding upon each Participant as
a consequence of the Participant's election to participate in the Plan, upon the
Company, upon the Participant's heirs, executors and administrators and upon the
successors and assigns of the Participant and the Company.

     14.6. Notices

           Any election made or notice given by a Participant pursuant to the
Plan shall be in writing to the Committee or to such representative thereof as
may be designated by the Committee for such purpose and shall be deemed to have
been made or given on the date received by the Committee or its representative.

     14.7. Governing Law

           The validity and interpretation of the Plan and of any of its
provisions shall be construed under the laws of the State of Delaware without
giving effect to the choice of law provisions thereof.

     14.8. Withholding

           The Company shall have the right to deduct from the amounts
distributable hereunder any federal, state or local taxes required by law to be
withheld with respect to such distributions, and such additional amounts of
withholding as are reasonably requested by the Participant.

                                       7
<PAGE>
 
     14.9. Effective Date
          
           This Plan shall be effective as of March 12, 1999.

                                       8

<TABLE> <S> <C>

<PAGE>
<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION DERIVED FROM FINANCIAL
STATEMENTS INCLUDED IN TREX COMPANY, INC.'S QUARTERLY REPORT ON FORM 10-Q FOR
THE THREE MONTHS ENDED MARCH 31, 1999 AND IS QUALIFIED IN ITS ENTIRETY BY
REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   3-MOS
<FISCAL-YEAR-END>                          DEC-31-1999
<PERIOD-START>                             MAR-31-1999
<PERIOD-END>                               MAR-31-1999
<CASH>                                           3,439
<SECURITIES>                                         0
<RECEIVABLES>                                    4,746
<ALLOWANCES>                                         0
<INVENTORY>                                      3,111
<CURRENT-ASSETS>                                12,361
<PP&E>                                          41,118
<DEPRECIATION>                                       0
<TOTAL-ASSETS>                                  62,789
<CURRENT-LIABILITIES>                           15,311
<BONDS>                                         26,905
                                0
                                      3,000
<COMMON>                                         2,350
<OTHER-SE>                                      15,223
<TOTAL-LIABILITY-AND-EQUITY>                    62,789
<SALES>                                         22,365
<TOTAL-REVENUES>                                22,365
<CGS>                                            9,942
<TOTAL-COSTS>                                    4,065
<OTHER-EXPENSES>                                     0
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                 819
<INCOME-PRETAX>                                  7,558
<INCOME-TAX>                                         0
<INCOME-CONTINUING>                              7,885
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                     7,885
<EPS-PRIMARY>                                        2
<EPS-DILUTED>                                        0
        


</TABLE>


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