Exhibit 2.1

                        KB INDUSTRIES LIMITED PARTNERSHIP
                                  AGREEMENT ON
                         TRANSFER OF GENERAL PARTNER AND
                            LIMITED PARTNER INTERESTS


     This agreement ("AGREEMENT"), dated as of July 3, 2001, is by and among LWK
Management Company,  Inc., a Nevada corporation ("LWK"), in its capacity as both
the  general  partner,  and  as a  limited  partner,  of KB  Industries  Limited
Partnership,  a California  limited  partnership  ("Partnership");  L&H Partners
Limited Partnership,  a Nevada limited partnership ("L&H"), in its capacity as a
limited partner in the Partnership;  BMC Framing,  Inc., a Delaware  corporation
("Framing"),  in its capacity as a limited partner in Partnership;  and Building
Materials Holding Corporation, a Delaware corporation ("BMHC").

                                  INTRODUCTION

     A.   The partnership interests in Partnership are owned as follows:

                           General Partner

          LWK Management Company, Inc.                         1%

                   Limited Partner

          LWK Management Company, Inc.                         49%
          L&H Partners Limited Partnership                     1%
          BMC Framing, Inc.                                    49%

     B.   Under Section 8.1 of the Limited Partnership  Agreement  ("PARTNERSHIP
AGREEMENT") of the  Partnership,  Framing reserved the right, by written notice,
to cause LWK and L&H to redeem their partnership  interests (the "INTERESTS") in
the Partnership (the  "REDEMPTION")  for an amount equal to the Redemption Price
(as defined below). As of May 1, 2001, Framing furnished a written notice of its
request for the  Redemption  (the  "NOTICE"),  in which  Framing  specified,  as
required  by the  Partnership  Agreement,  that  the  Redemption  Price  be paid
entirely in cash. The Notice also provided that the Redemption  would close, and
that LWK and L&H would cease to be partners of Partnership,  at 12:01 AM on July
3, 2001.

     C.   Rather than complete the redemption as provided for in the Partnership
Agreement,  LWK  desires  to sell and  BMHC  desires  to  purchase  the  general
partnership  interest  owned by LWK,  and LWK and L&H desire to sell and Framing
desires to purchase the limited  partnership  interests owned by LWK and L&H for
the price that  would  have been paid on the  Redemption  of the  Interests.  In
connection  with the purchase (the  "PURCHASE")  of the  Interests,  the parties
desire to set forth the terms and the




mechanism  for  determining  the  purchase  price  and  to  make  certain  other
agreements related to the Purchase as provided in this Agreement.

                                    AGREEMENT

     For valuable consideration, the receipt and sufficiency of which are hereby
acknowledged, the parties agree as follows:

     1.   THE PURCHASES. LWK shall sell its 1% general partner interest and BMHC
shall  purchase  the general  partner  interest.  LWK shall sell its 49% limited
partner  interest and L&H shall sell its 1% limited partner interest and Framing
shall purchase the collective 50% limited partner interests.  As a result,  BMHC
will hold a 1% general  partner  interest  and  Framing  will hold a 99% limited
partner interest in the Partnership upon consummation of the purchases.

     2.   PURCHASE PRICE AND PAYMENT TERMS. The purchase price for the Interests
to be  purchased  is a total of $1,020.00  consisting  of  $1,000.00  for the 1%
general partner  interest and 49% limited partner interest of LWK and $20.00 for
the 1% limited partner interest of L&H.

     3.   TRANSFER OF PARTNERSHIP  INTERESTS AND TAX MATTERS. On July 2, 2001 at
12:01 AM, the Interests  shall be  transferred by instruments of transfer in the
form attached hereto as Exhibit A and LWK and L&H shall have no further interest
whatsoever  as partners of the  Partnership  upon the  transfer,  but until such
date,  LWK shall  continue  as a partner  of the  Partnership  with a 1% general
partner interest and a 49% limited partner interest, and L&H shall continue as a
partner of the Partnership with a 1% limited partner interest.

     4.   REPRESENTATIONS  AND  WARRANTIES OF LWK. LWK  represents  and warrants
that: (a) LWK owns the 1% general  partner  interest and the 49% limited partner
interest  being  transferred of record and  beneficially,  free and clear of all
liens, encumbrances or other restrictions,  except for restrictions contained in
the  Partnership  Agreement;  (b) other than the  partnership  interests  in the
Partnership  owned by L&H and Framing,  to LWK's knowledge there are outstanding
no other partnership interests or rights to acquire partnership interests in the
Partnership;  and (c) to LWK's actual  knowledge,  the Partnership does not have
any  material  liabilities  or  obligations  of any nature  (absolute,  accrued,
contingent or otherwise), except as set forth or reflected on the latest balance
sheet of the Partnership delivered to Framing.

     5.   REPRESENTATIONS  AND  WARRANTIES OF L&H. L&H  represents  and warrants
that: (a) L&H owns the 1% limited partner  interest being  transferred of record
and  beneficially,   free  and  clear  of  all  liens,   encumbrances  or  other
restrictions,  except for restrictions  contained in the Partnership  Agreement;
(b)  other  than  the  partnership  interests  in  Partnership  owned by LWK and
Framing, to L&H's knowledge there are outstanding no other partnership interests
or rights to acquire partnership interests in the Partnership;  and (c) to L&H's
actual  knowledge,  the  Partnership  does not have any

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material liabilities or obligations of any nature (absolute, accrued, contingent
or  otherwise),  except as set forth or reflected on the latest balance sheet of
the Partnership delivered to Framing.

     6.   LIMITED  PARTNERSHIP  AGREEMENT;   PURCHASE.  To  the  extent  of  any
inconsistency between this Agreement and the Partnership Agreement, the terms of
this Agreement  shall control.  Upon payment of the purchase price hereunder the
terms and  conditions  of  Section  8.1 of the  Partnership  Agreement  shall be
considered satisfied in full.

     7.   NOTICES.  All  notices,   offers,   demands  or  other  communications
hereunder  shall be in writing.  Notices shall be deemed received on the date of
delivery or, if mailed,  on the date appearing on the return  receipt  therefor.
Notices  shall be  deemed to have been duly  given if  delivered  or if  mailed,
postage  prepaid and by registered  or certified  United States mail with return
receipt  requested and returned showing the date of delivery,  to the parties at
the addresses set forth below.

If to Framing:
                            BMC Framing, Inc.
          Physical          ATTN:  Paul Street
          Address:          720 Park Boulevard, Suite 200
                            Boise, Idaho 83712-7714
          Mailing           P.O. Box 70006
          Address:          Boise, Idaho 83707-0106

If to LWK:                  LWK Management Company, Inc.
                            ATTN:  Lawrence Knipp
                            22436 North Violetta Drive
                            Scottsdale, Arizona 85255

With a copy to:             Lewis and Roca LLP
                            Attn:  David E. Manch
                            40 N. Central Avenue
                            Phoenix, Arizona 85004-4429

If to L&H:                  L&H Partners Limited Partnership
                            ATTN:  Lawrence Knipp
                            22436 North Violetta Drive
                            Scottsdale, Arizona 85255

With a copy to:             Lewis and Roca LLP
                            Attn:  David E. Manch
                            40 N. Central Avenue
                            Phoenix, Arizona 85004-4429

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If to BMHC:                Building Materials Holding Corporation
                           One Market Plaza
                           Steuart Tower, Suite 2650
                           San Francisco, CA  94105-1475
                           Attention: Robert E. Mellor
                                      President and CEO

With copy to:              Building Materials Holding Corporation
                           720 Park Blvd, Suite 200
                           P.O. Box 70006
                           Boise, Idaho  83707-0106
                           Attention: Paul S. Street, Sr. Vice President,
                                      Chief Administrative Officer,
                                      General Counsel, and Corporate Secretary

     8.   ENTIRE AGREEMENT, AMENDMENT AND SUCCESSORS. This Agreement constitutes
the entire  agreement of the parties with respect to the matters  covered by it.
No alteration or  modification  of this Agreement shall be valid except as is in
writing and fully  executed by the parties.  If any term or provision  hereof is
illegal or invalid for any reason  whatsoever,  such  illegality  or  invalidity
shall not affect the  legality or validity of the  remainder  of the  Agreement.
This Agreement shall be binding upon the parties hereto,  their heirs,  personal
representatives, successors and assigns.

     9.   WAIVER AND  CONFLICT.  In the event of any conflict  between the terms
and provisions of this Agreement and the Partnership  Agreement,  this Agreement
shall control.

     10.  ARIZONA LAW. This Agreement  shall be construed in accordance with the
laws of the state of Arizona.

     11.  COUNTERPARTS.  This  Agreement  may  be  executed  in  any  number  of
counterparts.

     12.  HART-SCOTT-RODINO  ANTITRUST IMPROVEMENTS ACT OF 1976. Notwithstanding
any other provision of this  Agreement,  the  transactions  contemplated by this
Agreement shall not be consummated  until the expiration of the required waiting
period under the  Hart-Scott-Rodino  Antitrust  Improvements  Act of 1976 or the
early termination of such waiting period.

     13.  EXECUTION.  The parties have executed  this  Agreement as of the first
date shown above.

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         IN WITNESS WHEREOF, each of the parties has caused this Agreement to be
executed by its duly authorized officers or partners.

                                FRAMING:

                                BMC FRAMING, INC.


                                By: /s/ ROBERT E. MELLOR
                                    -------------------------------------------
                                Its: PRESIDENT AND CHIEF EXECUTIVE OFFICER
                                    -------------------------------------------


                                LWK:

                                LWK MANAGEMENT COMPANY, INC.


                                By: /s/ Larry Knipp
                                    -------------------------------------------
                                Its: MANAGER
                                    -------------------------------------------


                                L&H:

                                L&H PARTNERS LIMITED PARTNERSHIP

                            By: LAWRENCE W. KNIPP AND BEVERLY A. KNIPP
                                FAMILY TRUST, General Partner


                                /s/ LARRY W. KNIPP
                                -----------------------------------------------
                                Lawrence W. Knipp, Trustee


                                /s/ BEVERLY A. KNIPP
                                -----------------------------------------------
                                Beverly A. Knipp, Trustee


                                BMHC:

                                BUILDING MATERIALS HOLDING CORPORATION


                                By: /s/ ROBERT E. MELLOR
                                    -------------------------------------------
                                Its: PRESIDENT AND CHIEF EXECUTIVE OFFICER
                                    -------------------------------------------

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