JOINDER AND REVOLVER INCREASE AGREEMENT REGARDING AMENDED AND RESTATED CREDIT AGREEMENT

(a)    The New Revolving Lender (i) confirms that it has received copies of the Credit Agreement and the other Loan Documents, together with copies of the financial statements referred to therein and such other documents and information as it has deemed appropriate to make its own credit analysis and decision to enter into this Agreement; (ii) agrees that it will, independently and without reliance upon Agent or any Lender, based upon such documents and information as it shall deem appropriate at the time, continue to make its own credit decisions in taking or not taking any action under the Loan Documents; (iii) appoints and authorizes the Agent to take such action as agent on its behalf and to exercise such powers under the Loan Documents as are delegated to Agent by the terms thereof, together with such powers as are reasonably incidental thereto; and (iv) agrees that it will perform in accordance with their terms all of the obligations which by the terms of the Loan Documents are required to be performed by it as a Lender.

(b)    As of the Agreement Effective Date (as defined in Section 5 hereof), the New Revolving Lender shall be a party to the Credit Agreement and, to the extent of its Revolver Commitment set forth on Schedule C-1 to the Credit Agreement (as amended hereby), have the rights and obligations of a Lender thereunder and under the other Loan Documents.

(a)    The definition of “Maximum Revolver Amount” in Schedule 1.1 to the Credit Agreement is hereby amended and restated in its entirety to read as follows:

(b)    Schedule C-1 to the Credit Agreement is hereby amended and restated in its entirety as set forth on Schedule C-1 hereto.

(a)    that such Borrower is duly authorized to execute and deliver this Agreement, and that each Loan Party is duly authorized to perform its obligations under the Loan Documents to which it is a party;

(b)    that the execution and delivery of this Agreement by such Borrower do not and will not violate any material provision of federal, state or local law or regulation applicable to it or of their respective Governing Documents, or of any order, judgment, or decree of any court or other Governmental Authority binding on them;

(c)    that this Agreement is a legal, valid, and binding obligation of each Loan Party hereto, enforceable against such Loan Party in accordance with its terms, except as enforcement is limited by equitable principles or by bankruptcy, insolvency, reorganization, moratorium, or similar laws relating to or limiting creditors’ rights generally;

(d)    that, as of the Agreement Effective Date and after giving effect to this Agreement, the representations and warranties set forth in Section 4 of the Credit Agreement are true and correct in all material respects (except that such materiality qualifier shall not be applicable to any representations and warranties that already are qualified or modified by materiality in the text thereof), in each case with the same effect as if such representations and warranties had been made on the Agreement Effective Date, except to the extent that any such representation or warranty expressly relates to an earlier date;

(e)    that, as of the Agreement Effective Date and after giving effect to this Agreement, no Default or Event of Default has occurred and is continuing; and

(f)    that this Agreement may be effected without the consent or other approval of any Lender (other than the New Revolving Lender) pursuant to Section 2.4(g)(iv) of the Credit Agreement.

(a)    this Agreement shall have been executed and delivered by Agent, the New Revolving Lender and Borrowers, and acknowledged by (i) the Revolving Lenders identified on the Revolving Lender Acknowledgment attached hereto and (ii) the Guarantors;

(b)    Agent shall have received a certificate of each Loan Party dated as of the date hereof signed by the Secretary of such Loan Party as to the matters set forth in Section 2.4(g)(v) of the Credit Agreement, in form and substance reasonably satisfactory to Agent;

(c)    Agent shall have received the forms prescribed by the Internal Revenue Service of the United States certifying as to the New Revolving Lender’s status for purposes of determining exemption from United States withholding taxes with respect to all payments to be made to the New Revolving Lender under the Credit Agreement or such other documents as are necessary to indicate that all such payments are subject to such rates at a rate reduced by an applicable tax treaty, in each case in form satisfactory to Agent; and

(d)    Agent shall have received the administrative details of the New Revolving Lender, in form satisfactory to Agent.

(b)    Except as specifically modified by the terms of this Agreement, all other terms and provisions of the Credit Agreement and the other Loan Documents are incorporated by reference in this Agreement and in all respects continue in full force and effect. Each Borrower, by execution of this Agreement, and each Guarantor, by acknowledgement of this Agreement, hereby reaffirms, assumes, and binds itself to all applicable obligations, duties, rights, covenants, terms, and conditions that are contained

in the Credit Agreement (as amended hereby) and the other Loan Documents (including the granting of any Liens for the benefit of Agent and the Lenders).

(c)    This Agreement is a Loan Document. Each Borrower acknowledges that Agent’s reasonable costs and expenses (including reasonable attorneys’ fees) incurred in connection with this Agreement constitute Lender Group Expenses.

(d)    The parties may sign this Agreement in several counterparts, each of which will be deemed to be an original but all of which together will constitute one instrument. Delivery of an executed counterpart of a signature page of this Agreement by facsimile or in electronic (i.e., “pdf” or “tif”) format shall be effective as delivery of a manually executed counterpart of this Agreement.

BOISE CASCADE COMPANY,
a Delaware corporation, as a Borrower

By:    /s/ Kelly Hibbs
Name:    Kelly Hibbs
Title:    Vice President and Controller

BOISE CASCADE BUILDING MATERIALS DISTRIBUTION, L.L.C.,
a Delaware limited liability company, as a Borrower

By:    /s/ Kelly Hibbs
Name:    Kelly Hibbs
Title:    Vice President and Controller

BOISE CASCADE WOOD PRODUCTS, L.L.C.,
a Delaware limited liability company, as a Borrower

By:    /s/ Kelly Hibbs
Name:    Kelly Hibbs
Title:    Vice President and Controller

WELLS FARGO CAPITAL FINANCE, LLC,
as Agent

By:    /s/ Emily Chase
Name:    Emily Chase
Title:    Vice President

ZB, N.A. DBA ZIONS FIRST NATIONAL BANK,
as a Lender

By:    /s/ Odette Sutton
Name:    Odette Sutton
Title:    Vice President

Acknowledged and Agreed:

BOISE CASCADE WOOD PRODUCTS HOLDINGS CORP.,
a Delaware corporation, as a Guarantor

By:    /s/ Kelly Hibbs
Name:    Kelly Hibbs
Title:    Vice President and Controller

CHESTER WOOD PRODUCTS LLC,
a Delaware limited liability company, as a Guarantor

By:    /s/ Kelly Hibbs
Name:    Kelly Hibbs
Title:    Vice President and Controller

MONCURE PLYWOOD LLC,
a Delaware limited liability company, as a Guarantor

By:    /s/ Kelly Hibbs
Name:    Kelly Hibbs
Title:    Vice President and Controller

WELLS FARGO CAPITAL FINANCE, LLC,
as a Lender

By:    /s/ Emily Chase
Name:    Emily Chase
Title:    Vice President

BANK OF AMERICA, N.A.,
as a Lender

By:    /s/ Gregory A. Jones
Name:    Gregory A. Jones
Title:    Senior Vice President

U.S. BANK NATIONAL ASSOCIATION,
as a Lender

By:    /s/ Thomas P. Chidester
Name:    Thomas P. Chidester
Title:    Vice President

JPMORGAN CHASE BANK, N.A.,
as a Lender

By:    /s/ Jordan Azar
Name:    Jordon Azar
Title:    Authorized Officer

PNC BANK, NATIONAL ASSOCIATION,
as a Lender

By:    /s/ Fred Kiehne
Name:    Fred Kiehne
Title:    Senior Vice President