USG CORPORATION PERFORMANCE BASED RESTRICTED STOCK UNITS AGREEMENT

Payment of PBRSUs. The PBRSUs covered by this Agreement shall become payable to the Grantee if they become nonforfeitable in accordance with Section 2, Section 3 or Section 4 hereof.

Vesting of PBRSUs. Subject to the terms and conditions of Sections 3, 4 and 5 hereof, (a) the Grantee’s right to receive the Common Shares subject to 50% of the PBRSUs shall become nonforfeitable upon the anniversary of the Date of Grant that next follows the first full calendar year during the period from January 1, 2012 through December 31, 2014 (the “Performance Period”) during which the Company’s ____________ business unit (the “Unit”) shall have achieved audited positive adjusted operating profit (the “First Achievement Year”), if the Grantee shall have remained in continuous employment with the Company from the Date of Grant until the anniversary of the Date of Grant that next follows the First Achievement Year; and (b) if the First Achievement Year is 2012 or 2013, the remaining 50% of the PBRSUs will become nonforfeitable upon the anniversary of the Date of Grant that next follows the calendar year following the First Achievement Year if (i) the Unit achieves audited positive adjusted operating profit for the calendar year that follows the First Achievement Year, and (ii) the Grantee shall have remained in continuous employment with the Company from the Date of Grant until the anniversary of the Date of Grant that next follows the calendar year that follows the First Achievement Year. Subject to Section 3 hereof, (x) if the Unit does not achieve audited positive adjusted operating profit for any full calendar year during the Performance Period, the PBRSUs shall be forfeited, (y) if the Unit achieves audited positive adjusted operating profit for only one full calendar year during the Performance Period (including if the First Achievement Year is 2014), 50% of the PBRSUs shall be forfeited, and (z) if the Grantee’s right to receive the Common Shares subject to 50% of the PBRSUs becomes nonforfeitable based on the Unit’s achievement of audited positive adjusted operating profit for 2012 or 2013 but the Unit does not achieve audited positive adjusted

Effect of Change in Control. In the event that a Change in Control occurs during the Performance Period, but before all of the PBRSUs become nonforfeitable as set forth in Section 2 or Section 4 and at a time when all or a portion of the PBRSUs have not been forfeited, a pro rata number of the PBRSUs that remain nonforfeitable at the time of the Change in Control shall become nonforfeitable at the time of the Change in Control and shall be payable to the Grantee pursuant to Section 6. Such pro rata number of the PBRSUs that remain nonforfeitable at the time of the Change in Control shall be based on the number of full calendar months that have elapsed between July 18, 2012 and the Change in Control (as compared to the number of full calendar months between July 18, 2012 and the end of calendar year 2014), and the remaining PBRSUs will be forfeited.

Effect of Death or Disability. Notwithstanding Section 2 above, if the Grantee should die or become permanently and totally disabled while in the employ of the Company or any Subsidiary during the Performance Period, but before all of the PBRSUs become nonforfeitable as set forth in Section 2 and at a time when all or a portion of the PBRSUs have not been forfeited, the PBRSUs that remain nonforfeitable at the time of the Grantee’s death or disability shall remain in effect and the Grantee (or his beneficiary in the event of his death) shall retain the right to receive Common Shares with respect to a pro rata number of the PBRSUs that remain nonforfeitable at the time of the Grantee’s death or disability. Such pro rata number of PBRSUs shall become nonforfeitable upon the completion of any full calendar year during the Performance Period, beginning with the calendar year in which the death or disability occurs for which PBRSUs would have become nonforfeitable pursuant to Section 2 if the Grantee had not died or become disabled. Such pro rata number shall be based on (a) the number of PBRSUs that would have become nonforfeitable for any such calendar year pursuant to Section 2 if the Grantee had not died or become disabled, and (b) the number of full calendar months that shall have elapsed between July 18, 2012 and the date of the Grantee's death or disability (as compared to the number of full calendar months between July 18, 2012 and the end of the applicable calendar year during the Performance Period (if any) in which the Unit achieves audited positive net earnings). Payment in respect of such pro rata number of the PBRSUs shall be made in accordance with Section 6 and any remaining PBRSUs at that time that would have become nonforfeitable for such calendar year had the Grantee not died or become disabled shall be forfeited. The Grantee shall be considered to have become permanently and totally disabled if the Grantee has suffered a total disability within the meaning of the Company's Long Term Disability Plan for Salaried Employees and is “disabled” within the meaning of Section 409A(a)(2)(C) of the Code.

Forfeiture. In the event (i) that the Grantee’s employment shall, at a time when the PBRSUs remain forfeitable, terminate in a manner other than any specified in Section 4 hereof or (ii) of a determination by the Board (or a committee of the Board) pursuant to Section 20 hereof, the Grantee shall forfeit any PBRSUs that have not become nonforfeitable by such Grantee at the time of such termination or determination, as applicable.

Form and Time of Payment of PBRSUs. Except as otherwise provided for in Section 9, payment for the PBRSUs, after and to the extent they have become nonforfeitable, shall be made in the form of Common Shares. Payment shall be made within ten (10) days following the date that the PBRSUs become nonforfeitable pursuant to Section 2, 3 or 4 (subject to the determination described in the final sentence of Section 2, if applicable). Payment shall be made in any event not later than the fifteenth day of the third month after the end of the calendar year in which the PBRSUs become nonforfeitable. To the extent that the Company is required to withhold federal, state, local or foreign taxes in connection with the delivery of Common Shares to the Grantee or any other person under this Agreement, the number of Common Shares to be delivered to the Grantee or such other person shall be reduced (based on the Market Value per Share as of the date the Common Shares are delivered to the Grantee) to provide for the minimum amount of taxes required to be withheld, with any fractional shares that would otherwise be delivered being rounded up to the next nearest whole share. The Board (or a committee of the Board) may, at its discretion, adopt any alternative method of providing for taxes to be withheld.

Payment of Dividend Equivalents. From and after the Date of Grant and until the earlier of (a) the time when all of the Common Shares are delivered to the Grantee as described in Section 6 or (b) the time when the Grantee’s right to receive Common Shares upon payment of PBRSUs is forfeited, on the date that the Company pays a cash dividend (if any) to holders of Common Shares generally, the Grantee shall be entitled to a number of additional whole PBRSUs determined by dividing (i) the product of (A) the dollar amount of the cash dividend paid per Common Share on such date and (B) the total number of PBRSUs (including dividend equivalents paid thereon) credited to the Grantee as of such date, by (ii) the Market Value per Share on such date. Such dividend equivalents (if any) shall be subject to the same terms and conditions and shall be settled or forfeited in the same manner and at the same time as the PBRSUs to which the dividend equivalents were credited.

PBRSUs Nontransferable. Neither the PBRSUs granted hereby nor any interest therein or in the Common Shares related thereto shall be transferable other than by will or the laws of descent and distribution prior to payment.

Adjustments. In the event of any change in the aggregate number of outstanding Common Shares by reason of (a) any stock dividend, extraordinary dividend, stock split, combination of shares, recapitalization or other change in the capital structure of the Company, or (b) any Change in Control, merger, consolidation, spin-off, split-off, spin-

Compliance with Section 409A of the Code. To the extent applicable, it is intended that this Agreement and the Plan comply with the provisions of Section 409A of the Code, so that the income inclusion provisions of Section 409A(a)(1) of the Code do not apply to the Grantee. This Agreement and the Plan shall be administered in a manner consistent with this intent. Reference to Section 409A of the Code is to Section 409A of the Internal Revenue Code of 1986, as amended, and will also include any regulations or any other formal guidance promulgated with respect to such Section by the U.S. Department of the Treasury or the Internal Revenue Service.

No Right to Future Grants; No Right of Employment; Extraordinary Item. In accepting the grant, Grantee acknowledges that:  (a) the Plan is established voluntarily by the Company, it is discretionary in nature and it may be modified, suspended or terminated by the Company at any time, as provided in the Plan and this Award Agreement; (b) the grant of the PBRSUs is voluntary and occasional and does not create any contractual or other right to receive future grants of PBRSUs, or benefits in lieu of PBRSUs, even if PBRSUs have been granted in the past; (c) all decisions with respect to future grants, if any, will be at the sole discretion of the Company; (d) Grantee's participation in the Plan is voluntary; (e) the PBRSUs are an extraordinary item that does not constitute compensation of any kind for services of any kind rendered to the Company, its Affiliates and/or Subsidiaries, and which is outside the scope of Grantee's employment contract, if any; (f) the PBRSUs are not part of normal or expected compensation or salary for any purposes, including, but not limited to, calculating any severance, resignation, termination, redundancy, end of service payments, bonuses, long-service awards, pension or retirement benefits or similar payments; (g) in the event that Grantee is an employee of an Affiliate or Subsidiary of the Company, the grant will not be interpreted to form an employment contract or relationship with the Company; and furthermore, the grant will not be interpreted to form an employment contract with the Affiliate or Subsidiary that is Grantee's employer; (h) the future value of the underlying Shares is unknown and cannot be predicted with certainty; (i) no claim or entitlement to compensation or damages arises from forfeiture or termination of the PBRSUs or diminution in value of the PBRSUs or the Common Shares and Grantee irrevocably releases the Company, its Affiliates and/or its Subsidiaries from any such claim that may arise; and (j) notwithstanding any terms or conditions of the Plan to the contrary, except as specifically provided in this Agreement, in the event of involuntary termination of Grantee's employment, Grantee's right to receive PBRSUs and vest in PBRSUs under the

Employee Data Privacy. Grantee hereby explicitly and unambiguously consents to the collection, use and transfer, in electronic or other form, of Grantee's personal data as described in this document by and among, as applicable, the Company, its Affiliates and its Subsidiaries (“the Company Group”) for the exclusive purpose of implementing, administering and managing Grantee's participation in the Plan. Grantee understands that the Company Group holds certain personal information about Grantee, including, but not limited to, Grantee's name, home address and telephone number, date of birth, social insurance number or other identification number, salary, nationality, job title, any Shares of stock or directorships held in the Company, details of all PBRSUs or any other entitlement to Shares of stock awarded, canceled, exercised, vested, unvested or outstanding in Grantee's favor, for the purpose of implementing, administering and managing the Plan (“Data”). Grantee understands that Data may be transferred to any third parties assisting in the implementation, administration and management of the Plan, that these recipients may be located in Grantee's country or elsewhere, and that the recipient’s country may have different data privacy laws and protections than Grantee's country. Grantee understands that Grantee may request a list with the names and addresses of any potential recipients of the Data by contacting Grantee's local human resources representative. Grantee authorizes the recipients to receive, possess, use, retain and transfer the Data, in electronic or other form, for the purposes of implementing, administering and managing Grantee's participation in the Plan, including any requisite transfer of such Data as may be required to a broker or other third party with whom Grantee may elect to deposit any Shares acquired. Grantee understands that Data will be held only as long as is necessary to implement, administer and manage Grantee's participation in the Plan. Grantee understands that Grantee may, at any time, view Data, request additional information about the storage and processing of Data, require any necessary amendments to Data or refuse or withdraw the consents herein, in any case without cost, by contacting in writing Grantee's local human resources representative. Grantee understands, however, that refusing or withdrawing Grantee's consent may affect Grantee's ability to participate in the Plan. For more information on the consequences of Grantee's refusal to consent or withdrawal of consent, Grantee understand that Grantee may contact Grantee's local human resources representative.

Continuous Employment. For purposes of this Agreement, the continuous employment of the Grantee with the Company or a Subsidiary shall not be deemed to have been interrupted, and the Grantee shall not be deemed to have ceased to be an employee of the Company or Subsidiary, by reason of (a) the transfer of the Grantee’s employment among the Company and its Subsidiaries or (b) an approved leave of absence.

Relation to Plan. This Agreement is subject to the terms and conditions of the Plan. In the event of any inconsistency between the provisions of this Agreement and the Plan, the Plan shall govern. All terms used herein with initial capital letters and not otherwise defined herein that are defined in the Plan shall have the meanings assigned to them in the Plan. The Board (or a committee of the Board) acting pursuant to the Plan, as constituted from time to time, shall, except as expressly provided otherwise herein, have the right to determine any questions which arise in connection with the grant of the PBRSUs.

Amendments. Any amendment to the Plan shall be deemed to be an amendment to this Agreement to the extent that the amendment is applicable hereto; provided, however, that no amendment shall adversely affect the rights of the Grantee under this Agreement without the Grantee’s consent. Notwithstanding the foregoing, the limitation requiring the consent of a Grantee to certain amendments shall not apply to any amendment that is deemed necessary by the Company to ensure compliance with Section 409A of the Code.

Severability. Subject to Section 20, if any provision of this Agreement or the application of any provision hereof to any person or circumstances is held invalid, unenforceable or otherwise illegal, the remainder of this Agreement and the application of such provision to any other person or circumstances shall not be affected, and the provisions so held to be invalid, unenforceable or otherwise illegal shall be reformed to the extent (and only to the extent) necessary to make it enforceable, valid and legal.

Successors and Assigns. Without limiting Section 8 hereof, the provisions of this Agreement shall inure to the benefit of, and be binding upon, the successors, administrators, heirs, legal representatives and assigns of the Grantee, and the successors and assigns of the Company.

Governing Law. This Agreement shall be governed by and construed in accordance with the internal substantive laws of the State of Delaware, without giving effect to any principle of law that would result in the application of the law of any other jurisdiction.

The Grantee acknowledges that by clicking on the “Accept” button on the Morgan Stanley Smith Barney web page titled “Step 3: Confirm the Review/Acceptance of your Award,” the Grantee agrees to be bound by the electronic execution of this Award Agreement.

In accordance with Section 20(d) of the Plan, if the Board (or a committee of the Board) has determined that any fraud or intentional misconduct by the Grantee was a significant contributing factor to the Unit having to restate all or a portion of its financial statement(s), to the extent permitted by applicable law the Grantee shall: (a) return to the Company all Common Shares that the Grantee has not disposed of that were paid out pursuant to this Agreement; and (b) with respect to any Common Shares that the Grantee has disposed of that were paid out pursuant to this Agreement, pay to the Company in cash the value of such Common Shares on the date such Common Shares were paid out. The remedy specified herein shall not be exclusive, and shall be in addition to every other