Document:

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                                                                    EXHIBIT 10.5
                          [BUILDERS FIRSTSOURCE LOGO]

                            1998 STOCK INCENTIVE PLAN

                       NONQUALIFIED STOCK OPTION AGREEMENT

NAME OF OPTIONEE:                              <<Name>>

NUMBER OF SHARES OF BUILDERS FIRSTSOURCE, INC.
COMMON STOCK, $.01 PAR VALUE,
COVERED BY OPTION:                             <<TotalShares>>shares ("Option
                                               Shares")

PER SHARE OPTION PRICE:                        $0.315

OPTION GRANT DATE:                             March 1, 2004

<PAGE>

DATE NONQUALIFIED STOCK
OPTION BECOMES EXERCISABLE
(SUBJECT TO THE ATTAINMENT OF
THE PERFORMANCE CRITERIA AND
SUBJECT TO THE OTHER TERMS AND
CONDITIONS SET FORTH ON SCHEDULE A
TO THIS AGREEMENT):                     Up to <<ExerciseableShares>> Shares on
                                        December 31, 2004

                                        Up to <<ExerciseableShares>> Shares on
                                        December 31, 2005

                                        Up to <<ExerciseableShares2006>> Shares
                                        on December 31, 2006

      -     Schedule A to this Agreement sets forth the performance criteria and
            other terms and conditions to the vesting and exercisability of this
            Option based on the vesting schedule set forth above.

      -     Notwithstanding the foregoing vesting schedule and Schedule A to
            this Agreement, and subject to the terms of the Plan, the Option
            will become fully vested and exercisable on December 31, 2011,
            provided that the Optionee is continuously employed with the Company
            through such date, unless the Option is terminated earlier pursuant
            to the terms of the Plan or this Agreement.

OPTION TERMINATION DATE:                             April 30, 2014

<PAGE>

      This Stock Option Agreement (this "Agreement") is executed and delivered
as of the Option Grant Date by and between Builders FirstSource, Inc. (the
"Company") and the Optionee. The Optionee and the Company hereby agree as
follows:

      1.    Grant of Option. The Company, pursuant to the Builders FirstSource,
Inc. 1998 Stock Incentive Plan (as amended from time to time, the "Plan"), which
is incorporated herein by reference, and subject to the terms and conditions
thereof, hereby grants to the Optionee an option to purchase the Option Shares
at the Per Share Option Price.

      2.    Nonqualified Stock Options. The Option granted hereby shall be
treated as a nonqualified stock option under the Internal Revenue Code.

      3.    Termination of Options.

            (a)   Except as provided in this Section 3 or as otherwise provided
by the Board, the Option granted hereby may not be exercised and shall terminate
unless the Optionee at the time of exercise is then in the employ or service of
the Company and unless the Optionee has remained continuously so employed or in
such service since the Option Grant Date. No additional Option Shares become
exercisable after the Optionee's employment or service with the Company has
terminated for any reason. For purposes of this Agreement, the Company shall
determine the effective date of an Optionee's termination of employment or
service.

            (b)   In case of termination of the Optionee's employment or service
with the Company due to death, the Option granted hereby shall remain
exercisable by the Optionee's estate, beneficiaries, or heirs as to the number
of shares of Common Stock for which it was exercisable as of the date of death
for a period of ninety (90) days immediately following such date of death and
shall be cancelled and terminated with respect to the remainder of the shares of
Common Stock covered by the Option as of the date of death.

            (c)   In case of termination of the Optionee's employment or service
with the Company for Cause (as defined below), the Option granted hereby shall
be cancelled and terminated as of the date of such termination of employment.

            (d)   In case of termination of the Optionee's employment or service
with the Company for reason other than those set forth in subsections (b) or (c)
of this Section 3, the Option granted hereby shall remain exercisable as to the
number of shares of Common Stock for which it was exercisable as of the date of
termination for a period of sixty (60) days immediately following such
termination of employment or service and shall be cancelled and terminated with
respect to the remainder of the shares of Common Stock covered by the Option as
of the date of termination.

            (e)   The Option granted hereby shall in no event terminate later
than the close of business on the Option Termination Date and may be terminated
earlier pursuant to this Agreement or the provisions of the Plan.

      4.    For purposes of this Agreement, "Cause" shall mean:

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            (a)   any act of fraud, gross negligence, or dishonesty in the
performance of the Optionee's duties or the willful failure by the Optionee to
perform Optionee's duties;

            (b)   engaging in any action with the intention of causing harm or
damage to any of the Company's operations;

            (c)   conviction of a felony; or

            (d)   obtaining personal gain from a transaction in which the
Optionee has a conflict of interest with the Company.

      5.    The Optionee shall comply with and be bound by all the terms and
conditions contained in the Plan, as incorporated by reference herein.

      6.    Options granted hereby shall not be transferable except by will or
the laws of descent and distribution. During the lifetime of the Optionee, the
Option may be exercised only by the Optionee or the guardian or legal
representative of the Optionee.

      7.    The obligation of the Company to sell and deliver any stock under
this Option is specifically subject to all provisions of the Plan and all
applicable laws, rules, regulations, governmental and stockholder approvals, and
Company policies.

      8.    The Option Shares issued upon exercise of this Option may not be
sold, assigned, mortgaged, pledged, hypothecated, or otherwise transferred or
disposed of to any third party unless and until the Company successfully
completes an initial public offering of its Common Stock pursuant to the
Securities Act of 1933, as amended (the "Securities Act"). If the Company
completes an initial public offering of its Common Stock pursuant to the
Securities Act, the Option Shares may be sold thereafter in the open market,
subject to applicable legal and timing restrictions. If Optionee's employment
with the Company is terminated prior to an initial public offering of the
Company's Common Stock, the Optionee's Option Shares are subject to repurchase
by the Company under the terms and conditions described on Schedule A to the
Agreement.

      9.    In addition to the restrictions on transfer imposed by the Company
as described in paragraph 8 above, the Option Shares issued upon exercise of
this Option are "restricted securities," as such term is defined in Rule 144
under the Securities Act. Any resale of such Option Shares must comply with the
registration requirements of the Securities Act (and any state securities laws
that may be applicable) or an exemption therefrom.

      10.   The certificates for the Option Shares will bear restrictive legends
in substantially the following form:

      THE SECURITIES REPRESENTED BY THIS CERTIFICATE HAVE NOT BEEN REGISTERED
      UNDER THE SECURITIES ACT OF 1933, AS AMENDED, OR UNDER THE SECURITIES ACT
      OF ANY STATE. THE SECURITIES MAY NOT BE SOLD OR OFFERED FOR SALE IN THE
      ABSENCE OF AN EFFECTIVE REGISTRATION STATEMENT FOR THE

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      SECURITIES UNDER THE SECURITIES ACT OF 1933, AS AMENDED, AND SUCH STATE
      LAWS AS MAY BE APPLICABLE, OR AN OPINION OF COUNSEL SATISFACTORY TO THE
      COMPANY THAT SUCH REGISTRATION IS NOT REQUIRED.

      IN ADDITION TO THE FOREGOING, THE SECURITIES REPRESENTED BY THIS
      CERTIFICATE ARE SUBJECT TO CERTAIN RESTRICTIONS ON TRANSFER AND TO CERTAIN
      REPURCHASE RIGHTS EXERCISABLE BY THE COMPANY. THESE RESTRICTIONS ON
      TRANSFER AND REPURCHASE RIGHTS ARE SET FORTH IN THE STOCK OPTION AGREEMENT
      BETWEEN THE COMPANY AND THE HOLDER OF THE SECURITIES, AND REFERENCE TO
      SUCH AGREEMENT SHOULD BE MADE FOR A FULL DESCRIPTION OF SUCH TRANSFER
      RESTRICTIONS AND REPURCHASE RIGHTS.

      11.   By signing this Agreement, the Optionee agrees not to sell any
Option Shares at a time when any law, rule, regulation, or Company policy
prohibits a sale.

      12.   This Agreement does not give the Optionee the right to be retained
by the Company or any of its subsidiaries in any capacity. The Company reserves
the right to terminate the Optionee's service at any time, with or without
Cause.

      13.   The Optionee or the Optionee's estate, beneficiaries or heirs have
no rights as a stockholder of the Company until a certificate for the Option
Shares has been issued. No adjustments are made for dividends or other rights if
the applicable record date occurs before the Optionee's stock certificate is
issued, except as described in the Plan.

      14.   Any notice by the Optionee to the Company hereunder shall be in
writing and shall be deemed duly given only upon receipt thereof by the Company
at its principal offices. Any notice by the Company to the Optionee shall be in
writing and shall be deemed duly given if mailed to the Optionee at the address
last specified to the Company by the Optionee.

      15.   In signing this Agreement, Optionee agrees to keep confidential and
not to disclose to any person or any entity information concerning the Company's
Option Program, the number of Option Shares covered by this Agreement, any
transactions between the Optionee and the Company pursuant to this Agreement, or
the Company's stock price.

      16.   The validity and construction of this Agreement shall be governed by
the laws of the State of Delaware, without regard to the conflict of law
provisions thereof.

      THIS AGREEMENT IS MADE UNDER AND SUBJECT TO THE PROVISIONS OF THE PLAN (AS
IT MAY BE AMENDED FROM TIME TO TIME), AND ALL OF THE PROVISIONS OF THE PLAN ARE
ALSO PROVISIONS OF THIS AGREEMENT. IF THERE IS A DIFFERENCE OR CONFLICT BETWEEN
THE PROVISIONS OF THIS AGREEMENT AND THE PROVISIONS OF THE PLAN, THE PROVISIONS
OF THE PLAN WILL GOVERN. BY SIGNING THIS AGREEMENT, THE OPTIONEE ACCEPTS AND
AGREES TO ALL OF THE FOREGOING TERMS AND PROVISIONS AND TO ALL OF THE TERMS AND
PROVISIONS OF THE PLAN INCORPORATED HEREIN BY REFERENCE AND CONFIRMS THAT
OPTIONEE HAS RECEIVED A COPY OF THE PLAN.

<PAGE>

      IN WITNESS WHEREOF, the Company has caused this Agreement to be executed
by a duly authorized representative and the Optionee has hereunto set Optionee's
hand as of the Option Grant Date.

                                 BUILDERS FIRSTSOURCE, INC.

                                 By:  ____________________________________
                                      Donald F. McAleenan
                                      Senior Vice President and General Counsel

                                     _____________________________________
                                     <<Name>> (Optionee)

<PAGE>

                                   SCHEDULE A

                  TERMS AND CONDITIONS RELATING TO OPTION GRANT
           UNDER BUILDERS FIRSTSOURCE, INC. 1998 STOCK INCENTIVE PLAN

NAME OF OPTIONEE:                                    <<Name>>

NUMBER OF OPTION SHARES:                             <<TotalShares>>

OPTION GRANT DATE:                                   March 1, 2004

EXERCISE PRICE:                                      $0.315

VESTING SCHEDULE AND CONDITIONS:

A.    The Option granted hereby will vest in installments ("Option
      Installments") contingent on the Company achieving certain financial
      targets during the 2004-2006 calendar year periods, as set forth below.
      The Company's financial targets are based on the EBITDA amounts and RONA
      percentages (EBITDA and RONA are defined in Section E below) achieved by
      the Company during the applicable time periods. The Options granted hereby
      will vest in installments as follows:

      (i)   on December 31, 2004:

            (a)   <<M_112_of_TotalShares>> Option Shares (1/12 of total Option
                  Shares) will vest if the Company's EBITDA for calendar year
                  2004 is equal to or greater than $77,500,000.

            (b)   <<M_112_of_TotalShares>> Option Shares (1/12 of total Option
                  Shares) will vest if the Company's RONA for calendar year 2004
                  is equal to or greater than 19.1%.

      (ii)  on December 31, 2005:

            (a)   <<M_112_of_TotalShares>> Option Shares (1/12 of total Option
                  Shares) will vest if the Company's EBITDA for calendar year
                  2005 is equal to or greater than $88,200,000.

            (b)   <<M_112_of_TotalShares>> Option Shares (1/12 of total Option
                  Shares) will vest if the Company's RONA for calendar year 2005
                  is equal to or greater than 22.4%.

      (iii) on December 31, 2006:

<PAGE>

            (a)   <<M_112_of_TotalShares>> Option Shares (1/12 of total Option
                  Shares) will vest if the Company's EBITDA for calendar year
                  2006 is equal to or greater than $100,200,000.

            (b)   << M_112_of_TotalShares>> Option Shares (1/12 of total Option
                  Shares) will vest if the Company's RONA for calendar year 2006
                  is equal to or greater than 26.1%.

            (c)   <<EBITDA__of_TotalShares>> Option Shares (1/4 of total Option
                  Shares) will vest if the Company's cumulative EBITDA for
                  calendar years 2004, 2005, and 2006 is equal to or greater
                  than $265,900,000.

            (d)   <<RONA__of_TotalShares>> Option Shares (1/4 of total Option
                  Shares) will vest if the Company's RONA percentage (as
                  calculated in the manner set forth below in Section G) for the
                  period consisting of calendar years 2004, 2005, and 2006 is
                  equal to or greater than 22.6%.

B.    (i)   If a Change of Control (as defined below in Section F) occurs on or
      after January 1, 2005, but before December 31, 2006, (i) one half of any
      Option Installment that is scheduled to vest after the date of such Change
      of Control (as outlined in Section A above) will vest immediately prior to
      such Change of Control if the Company's cumulative EBITDA for the calendar
      years completed prior to such Change of Control meets or exceeds the sum
      of the annual EBITDA targets set forth in Section A above for the calendar
      years completed prior to such Change of Control and (ii) one half of any
      Option Installment that is scheduled to vest after the date of such Change
      of Control (as outlined in Section A above) will vest immediately prior to
      such Change of Control if the Company's average RONA (as calculated in the
      manner set forth in Section G below) for the calendar years completed
      prior to such Change of Control meets or exceeds the average of the annual
      RONA targets set forth in Section A above for the calendar years completed
      prior to such Change of Control. If the Change of Control occurs in 2005,
      the target will be actual 2004 performance meeting or exceeding the 2004
      target. If the Change of Control occurs in 2006, the target will be
      combined EBITDA for 2004 and 2005 being $165,700,000 or greater and the
      average RONA percentage for 2004 and 2005 combined being 20.75% or
      greater.

      (ii)  If a Change of Control occurs on or prior to December 31, 2004, (i)
            one half of the Option Shares covered by this Agreement will vest
            immediately prior to such Change of Control if the Company's EBITDA
            during the period of January 1, 2004 through the date of the Change
            of Control, considered on an annualized basis, meets the 2004 EBITDA
            target and (ii) one half of the Option Shares covered by this
            Agreement will vest immediately prior to such Change of Control if
            the Company's RONA during the period of January 1, 2004 through the
            date of the Change of Control, considered on an annualized basis,
            meets the 2004 RONA target.

<PAGE>

      (iii) Any Option Installment that did not vest on or prior to the date of
            a Change of Control due to the Company's failure to meet the
            applicable financial target will not vest as a result of the Change
            of Control. See Example B below.

      (iv)  Examples of vesting of Option Installments upon a Change of Control:

            (a)   Example A - Assume:

                  -     2004 EBITDA and RONA targets met.

                  -     2005 EBITDA and RONA targets met.

                  -     Cumulative EBITDA for the 2004-2005 period exceeds
                        $165,700,000.

                  -     RONA for the 2004-2005 period exceeds 20.75%.

                  -     A Change of Control occurs on May 31, 2006.

                  Result:

                  -     All Option Shares scheduled to vest on December 31, 2004
                        would vest.

                  -     All Option Shares scheduled to vest on December 31, 2005
                        would vest.

                  -     All Option Shares scheduled to vest on December 31, 2006
                        (including the Option Installments based on three (3)
                        year cumulative financial performance) would vest.

            (b)   Example B - Assume:

                  -     2004 EBITDA and RONA targets met.

                  -     2005 RONA target met; 2005 EBITDA target missed.

                  -     Cumulative EBITDA for the 2004-2005 period exceeds
                        $165,700,000.

                  -     RONA for the 2004-2005 period exceeds 20.75%.

                  -     A Change of Control occurs on May 31, 2006.

                  Result:

                  -     All Option Shares scheduled to vest on December 31, 2004
                        would vest.

                  -     One half (1/2) of the Option Shares scheduled to vest on
                        December 31, 2005 would vest; the other one half (1/2)
                        would not vest.

<PAGE>

                  -     All Option Shares scheduled to vest on December 31, 2006
                        (including the Option Installments based on three (3)
                        year cumulative financial performance) would vest.

            (c)   Example C - Assume:

                  -     2004 EBITDA and RONA targets met.

                  -     2005 RONA target met; 2005 EBITDA target missed.

                  -     Cumulative EBITDA for the 2004-2005 period is less than
                        $165,700,000.

                  -     RONA for the 2004-2005 period exceeds 20.75%.

                  -     A Change of Control occurs on May 31, 2006.

                  Result:

                  -     All Option Shares scheduled to vest on December 31, 2004
                        would vest.

                  -     One-half (1/2) of the Option Shares scheduled to vest on
                        December 31, 2005 would vest, the other one-half (1/2)
                        would not vest.

                  -     One-half (1/2) of the Option Shares scheduled to vest on
                        December 31, 2006 (including one-half (1/2) of the
                        Option Installments based on three (3) year cumulative
                        financial performance) would vest; the other one-half
                        (1/2) would not vest.

            (d)   Example D - Assume:

                  -     EBITDA amounts for January 1, 2004 to December 14, 2004
                        annualized to approximate the year-end amount equal or
                        exceed 77,500,000.

                  -     RONA percentages for January 1, 2004 to December 14,
                        2004 annualized to approximate the year-end percentage
                        do not equal or exceed 19.1%.

                  -     A Change of Control occurs on December 15, 2004.

                  Result:

                  -     One half (1/2) of the Option Shares would vest; the
                        other one half (1/2) would not vest.

C.    If any of the Option Installments have not previously vested in accordance
      with either Section A or B above, those Option Installments will vest,
      regardless of the achievement by the Company of the financial performance
      targets set forth in Section A above, on December 31, 2011.

<PAGE>

D.    In all cases, the vesting of each Option Installment (whether pursuant to
      Section A, B, or C above) is contingent on the continuous, uninterrupted
      employment or service of the Optionee with the Company from the Option
      Grant Date through the applicable vesting date.

E.    For purposes of this Agreement, (i) "RONA" (Return on Net Tangible Assets)
      shall mean EBIT divided by average Net Tangible Assets; (ii) "EBIT" shall
      mean earnings before interest and taxes; (iii) "EBITDA" shall mean
      earnings before interest, taxes, depreciation and amortization; and (iv)
      "Net Tangible Assets" shall mean the sum of (a) accounts receivable, net
      of allowance for doubtful accounts (inclusive of securitized accounts
      receivable), (b) inventory at the lower of cost or market, (c) prepaid
      expenses and other current assets, (d) accounts payable, (e) accrued
      liabilities (including book overdrafts), and (f) net property plant and
      equipment. RONA and EBITDA shall be determined by the Company in its
      reasonable discretion consistent with generally accepted accounting
      principles in effect on the Option Grant Date.

F.    For purposes of this Agreement, a "Change of Control" means the occurrence
      of any of the following events: (a) any "Person" (within the meaning of
      Section 12(d)(3) or 14(d)(2) of the Securities Exchange Act of 1934, as
      amended (the "Exchange Act")), other than JLL Fund II, L.P. or JLL Fund
      III, L.P., or any of their respective affiliates, becomes a Beneficial
      Owner (within the meaning of Rule 13d-3 promulgated under the Exchange
      Act) of more than fifty percent (50%) of the combined voting power of the
      then outstanding voting securities of the Company entitled to vote
      generally in the election of directors; (b) there is consummated a merger
      or consolidation of the Company or any direct or indirect subsidiary of
      the Company with any other Company, other than a merger or consolidation
      that would result in the voting securities of the Company outstanding
      immediately prior to such merger or consolidation continuing to represent
      (either by remaining outstanding or by being converted into voting
      securities of the surviving entity or any parent thereof) at least fifty
      percent (50%) of the combined voting power of the securities of the
      Company or such surviving entity or any parent thereof outstanding
      immediately after such merger or consolidation; (c) the stockholders of
      the Company approve a plan of complete liquidation or dissolution of the
      Company or there is consummated an agreement for the sale or disposition
      by the Company of all or substantially all of the Company's assets; or (d)
      the following individuals cease for any reason to constitute a majority of
      the number of directors then serving: individuals who, as of the date
      hereof, constitute the Board of Directors of the Company (the "Board") and
      any new director (other than a director whose initial assumption of office
      is in connection with an actual or threatened election contest, including
      but not limited to a consent solicitation, relating to the election of
      directors of the Company) whose appointment or election by the Board or
      nomination for election by the Company's stockholders was approved or
      recommended by a vote of at least a majority of the directors then still
      in office who either were directors on the date hereof or whose
      appointment, election or nomination for election was previously so
      approved or recommended.

G.    For the purposes of calculating cumulative performance over multiple
      calendar years in Subsections A(iii) and B(i) above, (a) EBITDA will be
      the sum of the earnings before interest, taxes, depreciation and
      amortization for all the relevant calendar years and (b)

<PAGE>

      RONA will be the sum of EBIT for each of the relevant calendar years
      divided by the sum of the average Net Tangible Assets for each of the
      relevant years.

REPURCHASE OF OPTION SHARES AT THE COMPANY'S OPTION:

The Company will have a 120-day option to repurchase the Optionee's Option
Shares in the event that the Optionee's employment with the Company terminates
for any reason. If the Company exercises this repurchase option, the repurchase
price will be the fair market value of the Option Shares as determined by the
Board in its sole discretion. The Company may exercise its option within 120
days after the Optionee's last date of employment (the "Repurchase Option
Period") by providing the Optionee with written notice of its election to
repurchase. Upon the giving of such notice, the Option Shares will be deemed
repurchased and Optionee shall have no rights as a stockholder, except that upon
delivering the stock certificate representing such Option Shares to the Company,
properly endorsed over to the Company as reasonably required by the Company, the
Company will promptly deliver to Optionee a check in the full amount of the
repurchase price. If the Optionee has not held the Option Shares for at least
six-months since exercising the Option, the period during which the Company may
exercise its repurchase option will be extended until 120 days after the
expiration of such six-month period. The Company's repurchase rights relating to
the Option Shares will terminate upon completion of an initial public offering
of the Company's Common Stock.

RESTRICTIONS ON TRANSFER:

Please refer to Sections 8, 9 and 10 of the Stock Option Agreement for a
description of the transfer restrictions applicable to the Option Shares.
,<PAGE>

                                                                    EXHIBIT 10.6

                           BUILDERS FIRSTSOURCE, INC.
                            1998 STOCK INCENTIVE PLAN

                       NONQUALIFIED STOCK OPTION AGREEMENT

NAME OF OPTIONEE:                                  <<Name>>

NUMBER OF SHARES OF BUILDERS FIRSTSOURCE, INC.
COMMON STOCK, $.01 PAR VALUE,
COVERED BY OPTION:                                 <<TotalShares>> shares
                                                   ("Option Shares")

PER SHARE OPTION PRICE:                            $1.00

OPTION GRANT DATE:                                 <<GrantDate>>

<PAGE>

DATE NONQUALIFIED STOCK
OPTION BECOMES EXERCISABLE
(SUBJECT TO THE ATTAINMENT OF
THE PERFORMANCE CRITERIA AND
SUBJECT TO THE OTHER TERMS AND
CONDITIONS SET FORTH ON SCHEDULE A
TO THIS AGREEMENT):                         <<ExerciseableShares>> Shares on
                                     <<ExerciseDate>>, 2004

                                            <<ExerciseableShares>> Shares on
                                     <<ExerciseDate>>, 2005

                                            <<ExerciseableShares>> Shares on
                                     <<ExerciseDate>>, 2006

                                            <<ExerciseableShares>> Shares on
                                     <<ExerciseDate>>, 2007

                                            <<ExerciseableShares>> Shares on
                                     <<ExerciseDate>>, 2008.

      -     Schedule A to this Agreement sets forth the performance criteria and
            other terms and conditions to the vesting and exercisability of this
            Option based on the vesting schedule set forth above.

      -     Notwithstanding the foregoing vesting schedule and Schedule A to
            this Agreement, and subject to the terms of the Plan, the Option
            will become fully vested and exercisable on the ninth anniversary of
            the Option Grant Date (NinthAnniversaryDate), provided that the
            Optionee is continuously employed with the Company through such
            date, unless the Option is terminated earlier pursuant to the terms
            of the Plan or this Agreement.

OPTION TERMINATION DATE:                           <<OptionTermDate>>

<PAGE>

      This Stock Option Agreement (this "Agreement") is executed and delivered
as of the Option Grant Date by and between Builders FirstSource, Inc. (the
"Company") and the Optionee. The Optionee and the Company hereby agree as
follows:

      1. Grant of Option. The Company, pursuant to the Builders FirstSource,
Inc. 1998 Stock Incentive Plan (the "Plan"), which is incorporated herein by
reference, and subject to the terms and conditions thereof, hereby grants to the
Optionee an option to purchase the Option Shares at the Per Share Option Price.

      2. Nonqualified Stock Options. The Option granted hereby shall be treated
as a nonqualified stock option under the Internal Revenue Code.

      3. Termination of Options.

           (a)  Except as provided in this Section 3 or as otherwise provided by
the Board, the Option granted hereby may not be exercised and shall terminate
unless the Optionee at the time of exercise is then in the employ or service of
the Company, and unless the Optionee has remained continuously so employed or in
such service since the date of grant of the Option. No additional Option Shares
become exercisable after the Optionee's employment or service with the Company
has terminated for any reason. For purposes of this Agreement, the Company shall
determine the effective date of an Optionee's termination of employment or
service.

            (b) In case of termination of the Optionee's employment or service
with the Company due to death, the Option granted hereby shall be exercisable as
to the number of shares of Common Stock for which it was exercisable as of the
date of death and shall remain exercisable as to such shares by the Optionee's
estate, beneficiaries or heirs for a period of ninety days immediately following
such termination of employment.

            (c) In case of termination of the Optionee's employment or service
with the Company for Cause (as defined below), the Option granted hereby shall
be cancelled and terminated as of the date of such termination of employment.

            (d) In case of termination of the Optionee's employment or service
with the Company for any other reason, the Option granted hereby shall remain
exercisable as to the number of shares of Common Stock for which it was
exercisable as of the date of termination for a period of 60 days immediately
following such termination of employment or service and shall be cancelled and
terminated with respect to the remainder of the shares of Common Stock covered
by the Option as of the date of termination.

            (e) The Option granted hereby shall in no event terminate later than
the close of business on the Option Termination Date and may be terminated
earlier pursuant to this Agreement or the provisions of the Plan.

      4. For purposes of this Agreement, "Cause" shall mean:

            (a) any act of fraud, gross negligence or dishonesty in the
performance of the Optionee's duties or the willful failure by the Optionee to
perform his or her duties;

<PAGE>

            (b) engaging in any action with the intention of causing harm or
damage to any of the Company's operations;

            (c) conviction of a felony; or

            (d) obtaining personal gain from a transaction in which the Optionee
has a conflict of interest with the Company.

      5. The Optionee shall comply with and be bound by all the terms and
conditions contained in the Plan, as incorporated by reference herein.

      6. Options granted hereby shall not be transferable except by will or the
laws of descent and distribution. During the lifetime of the Optionee, the
Option may be exercised only by the Optionee, the guardian or legal
representative of the Optionee.

      7. The obligation of the Company to sell and deliver any stock under this
Option is specifically subject to all provisions of the Plan and all applicable
laws, rules, regulations, governmental and stockholder approvals and Company
policies.

      8. The Option Shares issued upon exercise of this Option may not be sold,
assigned, mortgaged, pledged, hypothecated, or otherwise transferred or disposed
of to any third party, until and unless the Company successfully completes an
initial public offering of its Common Stock pursuant to the Securities Act of
1933, as amended (the "Securities Act"). In the event the Company completes an
initial public offering of its Common Stock pursuant to the Securities Act, the
Option Shares may be sold thereafter in the open market, subject to applicable
legal and timing restrictions. If Optionee's employment with the Company is
terminated prior to an initial public offering of the Company's Common Stock,
the Optionee's Option Shares are subject to repurchase by the Company under the
terms and conditions described on Schedule A to the Agreement.

      9. In addition to the restrictions on transfer imposed by the Company as
described in paragraph 8 above, the Option Shares issued upon exercise of this
Option are "restricted securities," as such term is defined in Rule 144 under
the Securities Act. Any resale of such Option Shares must comply with the
registration requirements of the Securities Act (and any state securities laws
that may be applicable) or an exemption therefrom.

      10. The certificates for the Option Shares will bear restrictive legends
in substantially the following form:

      THE SECURITIES REPRESENTED BY THIS CERTIFICATE HAVE NOT BEEN REGISTERED
      UNDER THE SECURITIES ACT OF 1933, AS AMENDED, OR UNDER THE SECURITIES ACT
      OF ANY STATE. THE SECURITIES MAY NOT BE SOLD OR OFFERED FOR SALE IN THE
      ABSENCE OF AN EFFECTIVE REGISTRATION STATEMENT FOR THE SECURITIES UNDER
      THE SECURITIES ACT OF 1933, AS AMENDED, AND SUCH STATE LAWS AS MAY BE
      APPLICABLE, OR AN OPINION OF

<PAGE>

      COUNSEL SATISFACTORY TO THE COMPANY THAT SUCH REGISTRATION IS NOT
      REQUIRED.

      IN ADDITION TO THE FOREGOING, THE SECURITIES REPRESENTED BY THIS
      CERTIFICATE ARE SUBJECT TO CERTAIN RESTRICTIONS ON TRANSFER AND TO CERTAIN
      REPURCHASE RIGHTS EXERCISABLE BY THE COMPANY. THESE RESTRICTIONS ON
      TRANSFER AND REPURCHASE RIGHTS ARE SET FORTH IN THE STOCK OPTION AGREEMENT
      BETWEEN THE COMPANY AND THE HOLDER OF THE SECURITIES, AND REFERENCE TO
      SUCH AGREEMENT SHOULD BE MADE FOR A FULL DESCRIPTION OF SUCH TRANSFER
      RESTRICTIONS AND REPURCHASE RIGHTS.

      11. By signing this Agreement, the Optionee agrees not to sell any Option
Shares at a time when any law, regulation or Company policy prohibits a sale.

      12. This Agreement does not give the Optionee the right to be retained by
the Company or any of its subsidiaries in any capacity. The Company reserves the
right to terminate the Optionee's service at any time, with or without Cause.

      13. The Optionee or the Optionee's estate, beneficiaries or heirs have no
rights as a stockholder of the Company until a certificate for the Option Shares
has been issued. No adjustments are made for dividends or other rights if the
applicable record date occurs before the Optionee's stock certificate is issued,
except as described in the Plan.

      14. Any notice by the Optionee to the Company hereunder shall be in
writing and shall be deemed duly given only upon receipt thereof by the Company
at its principal offices. Any notice by the Company to the Optionee shall be in
writing and shall be deemed duly given if mailed to the Optionee at the address
last specified to the Company by the Optionee.

      15. The validity and construction of this Agreement shall be governed by
the laws of the State of Delaware.

      THIS AGREEMENT IS MADE UNDER AND SUBJECT TO THE PROVISIONS OF THE PLAN,
AND ALL OF THE PROVISIONS OF THE PLAN ARE ALSO PROVISIONS OF THIS AGREEMENT. IF
THERE IS A DIFFERENCE OR CONFLICT BETWEEN THE PROVISIONS OF THIS AGREEMENT AND
THE PROVISIONS OF THE PLAN, THE PROVISIONS OF THE PLAN WILL GOVERN. BY SIGNING
THIS AGREEMENT, THE OPTIONEE ACCEPTS AND AGREES TO ALL OF THE FOREGOING TERMS
AND PROVISIONS AND TO ALL OF THE TERMS AND PROVISIONS OF THE PLAN INCORPORATED
HEREIN BY REFERENCE AND CONFIRMS THAT HE OR SHE HAS RECEIVED A COPY OF THE PLAN.

<PAGE>

      IN WITNESS WHEREOF, the Company has caused this Agreement to be executed
by a duly authorized representative and the Optionee has hereunto set his hand
as of the Option Grant Date.

                                   BUILDERS FIRSTSOURCE, INC.:

                                   By: ____________________________________
                                       Donald F. McAleenan
                                       Senior Vice President and General Counsel

                                      ____________________________________
                                       <<Name>> (Optionee)

<PAGE>

                                   SCHEDULE A

                  TERMS AND CONDITIONS RELATING TO OPTION GRANT
           UNDER BUILDERS FIRSTSOURCE, INC. 1998 STOCK INCENTIVE PLAN

NAME OF OPTIONEE:                                    <<Name>>

NUMBER OF OPTION SHARES:                             <<TotalShares>>

OPTION GRANT DATE:                                   <<GrantDate>>

EXERCISE PRICE:                                      $1.00

VESTING SCHEDULE AND CONDITIONS:

A.    The Option granted hereby will vest in five equal annual installments
      (each, an "Installment") commencing on the first anniversary of the Option
      Grant Date with full vesting on the fifth anniversary of the Option Grant
      Date (the "Performance Period"); provided, that the vesting of each
      Installment is subject to the following conditions:

      (i)   the continued employment of the Optionee with the Company through
            the applicable vesting date; and

      (ii)  the achievement by the Company of a 10% Return on Net Assets for the
            calendar year (January 1 - December 31) immediately preceding the
            vesting of the Installment. For example, the Option Installment
            scheduled to vest on (ExerciseDate), 2004 will vest if the Company's
            Return on Net Assets for the 2003 calendar year equals or exceeds
            10%.

      (iii) If an Installment does not vest due to the Company's failure to
            achieve a 10% Return on Net Assets for any calendar year during the
            five-year Performance Period, that Installment will subsequently
            vest if the Company achieves an average annual 10% Return on Net
            Assets for the period commencing January 1 of such calendar year and
            ending on December 31 of any succeeding calendar year during the
            Performance Period.

      (iv)  Return on Net Assets is calculated as follows: Earnings before
            interest and taxes (EBIT) divided by the sum of net fixed assets and
            working capital.

B.    The Option will vest in full on (NinthAnniversaryDate) regardless of
      whether the performance criteria described in A (ii) or (iii) above have
      been achieved as long as the Optionee has been continuously employed by
      the Company through such date, unless the Option is terminated earlier
      pursuant to the Plan or this Agreement.

REPURCHASE OF OPTION SHARES:

<PAGE>

A.    AT THE EMPLOYEE'S OPTION:

(i)   In the event that the Optionee's employment with the Company terminates
      for any reason other than for Cause, the Optionee may request that the
      Company repurchase his or her Option Shares issued upon exercise of the
      Option. The Optionee's written irrevocable request to the Company to
      repurchase such Option Shares (along with the stock certificate endorsed
      to the Company) must be received by the Company within 60 days after the
      Optionee's last date of employment. Subject to compliance with the
      conditions described below, the Company will repurchase the Option Shares
      issued upon exercise of the Option at their then applicable fair market
      value, as determined by the Board of Directors in its sole discretion. The
      Company's obligation to repurchase an Optionee's Option Shares will be
      subject to the following conditions:

            (a)   The Optionee must have exercised his or her Option and owned
                  the underlying Option Shares for at least six (6) months prior
                  to the date of repurchase;

            (b)   The Optionee must have had full investment risk with respect
                  to such Option Shares during the six- month period prior to
                  the date of repurchase (i.e., the Optionee must have paid the
                  full exercise price for such Option Shares prior to the start
                  of such six-month period and such Option Shares must not have
                  been subject to forfeiture under any pledge or loan
                  arrangement during such six-month period); and

            (c)   Fulfillment of the additional conditions set forth in (ii)
                  below.

      The Company will repurchase the Option Shares by delivering a check to the
      Optionee in the full amount of the purchase price.

(ii)  The Company's obligation to repurchase the Optionee's Option Shares will
      not apply to the extent that total repurchases by the Company of common
      stock (the "Common Stock") from all employees during the calendar year in
      which the Optionee's employment is terminated exceed $500,000 (the "Annual
      Cap"). The Annual Cap will be applied in accordance with the policy set
      forth in subsections (a) through (e) below. The Company's obligation to
      repurchase the Option Shares will also be subject to compliance with
      applicable law and the provisions of the Company's then existing loan
      facility.

            (a)   During a calendar year (the "Calendar Year"), the Company will
                  repurchase the first $25,000 of Common Stock (including Option
                  Shares) from each employee departing during that Calendar Year
                  who tenders his or her Common Stock for repurchase in
                  accordance with the Agreement. The Company's repurchase
                  obligation for any Calendar Year will be subject to the Annual
                  Cap for that Calendar Year. The shares tendered (up to
                  $25,000) by each employee will be repurchased

<PAGE>

                  by the Company on a "first come, first served" basis (up to
                  $500,000 in repurchases in that Calendar Year).

            (b)   If the Annual Cap is met at any time during the Calendar Year,
                  the Company may, at its option, continue to repurchase up to
                  $25,000 of tendered shares from departing employees at such
                  times it deems appropriate.

            (c)   If the Annual Cap is not exceeded during the Calendar Year, in
                  December of the Calendar Year, the Company will contact those
                  departing employees who previously tendered MORE than $25,000
                  in shares during the year to determine if they are still
                  interested in having their additional shares repurchased at
                  that time. The shares of employees who still wish to tender
                  will be aggregated. The Company will then repurchase that
                  number of shares whose aggregate purchase price is equal to
                  the difference between $500,000 and the amount spent by the
                  Company to date repurchasing shares to date in the Calendar
                  Year. Shares will be repurchased from all such participating
                  employees on a pro rata basis.

            (d)   Tendered shares that are not repurchased as of the end of the
                  Calendar Year under the preceding procedures will be eligible
                  for repurchase during the following calendar year (the
                  "Following Calendar Year"). It is currently the Company's
                  intent to repurchase an additional $25,000 of any remaining
                  balance of each former employee's Stock in January of the
                  Following Calendar Year. Any balance remaining after such
                  repurchase will again be subject to pro rata repurchase if the
                  Company has not met the Annual Cap in December of the
                  Following Calendar Year. The Company intends, but is not
                  required, to repeat this process each subsequent calendar year
                  until all of the former employee's Stock is repurchased.

            (e)   Shares tendered by departing employees will be purchased at
                  their then applicable fair market value at the time of
                  purchase, as determined by the Board of Directors of the
                  Company in its sole discretion.

B.    AT THE COMPANY'S OPTION:

      (i)   The Company will have a 120-day option to repurchase the Optionee's
            Option Shares in the event that the Optionee's employment with the
            Company terminates for any reason. If the Company exercises this
            repurchase option, the repurchase price will be the fair market
            value of the Option Shares as determined by the Board in its sole
            discretion. The Company may exercise its option by providing the
            Optionee with written notice of its election to repurchase, together
            with a check in the full amount of the purchase price, within 120
            days after the Optionee's last date of employment (the "Repurchase
            Option Period"). In the event that the Optionee has not satisfied
            the minimum six-month holding period

<PAGE>

            referred to in A(i) above, the period during which the Company may
            exercise its repurchase option will be extended until thirty (30)
            days after the expiration of the six-month holding period.

C.    The Company's repurchase rights and obligations relating to the Option
      Shares will terminate upon completion of an initial public offering of the
      Company's Common Stock.

RESTRICTIONS ON TRANSFER:

Please refer to Sections 8, 9 and 10 of the Stock Option Agreement for a
description of the transfer restrictions applicable to the Option Shares.

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