SEPARATION AGREEMENT AND RELEASE OF ALL CLAIMS

Exhibit 10.1

SEPARATION AGREEMENT AND

RELEASE OF ALL CLAIMS

This Separation Agreement and Release of all Claims (“Release”) is made and entered into by and between Hank Krey (“Employee”) and Huttig Building Products, Inc., its affiliates, subsidiaries, related corporations, successors and assigns (the “Company”) as of this 28^th day of April, 2006 (the “Effective Date”). In consideration of the following promises, the parties agree as follows:

1. Employee acknowledges that he will separate from employment with the Company effective as of the earlier of (a) March 30, 2007 or (b) such date as Employee commences full-time employment with another employer (such date being hereafter referred to as the “Separation Date”). As of the Separation Date, Employee’s employment relationship with the Company will end. In connection with Employee’s separation, the Company and Employee have agreed to settle all matters relating to Employee’s employment relationship with the Company and its termination.

2. Employee voluntarily terminates and irrevocably resigns from the Company effective as of the Separation Date, which termination and resignation is hereby accepted by the Company. Employee’s personnel file will reflect his resignation as of the Separation Date. As of March 30, 2006, Employee shall automatically and without taking any further actions be deemed to have resigned from all officer and director positions then held by him with the Company and all of its subsidiaries. Notwithstanding the foregoing, Employee will continue as an employee of the Company until the Separation Date, although his active employment will end on March 30, 2006. He will be on paid leave from March 30, 2006 through the Separation Date (the “Severance Period”). Employee shall promptly notify the Company in writing if he becomes employed on a full-time basis by another employer prior to March 30, 2007 which notification shall include the amount of Employee’s new base salary with his new employer.

3. In consideration for the releases and covenants by Employee contained in this Release, the Company shall, on the terms and conditions hereinafter set forth, provide to Employee:

Employee acknowledges that the above payments and benefits are provided to Employee in consideration and recognition of past services rendered and in exchange for Employee’s promises and obligations herein. Employee further acknowledges that such payments and benefit are made in lieu of any and all payments or benefits that might otherwise be available to Employee arising out of his employment with the Company (excluding Employee’s non-forfeitable balance, if any, in the Huttig Deferred Compensation Plan and Employee’s non-forfeitable rights to his accrued benefits, if any, under the Huttig 401(k) plan).

4. In consideration for the foregoing, Employee, Employee’s successors and assigns, and anyone claiming by or through Employee (the “Employee Parties”) hereby irrevocably and unconditionally release and forever discharge the Company, its affiliates, subsidiaries, and related entities, and their respective owners, directors, officers, employees, agents, successors and assigns (collectively the “Company Parties”) from and against any and all manner of actions, liability, causes of action, claims, demands, contracts, attorney’s fees, back pay, claims for personal injury, discrimination, and/or mental anguish, claims for vacation pay, sick pay, or any other employee benefits, which any of the Employee Parties now may have or hold or at any time heretofore had or held, arising out of, existing by reason of, resulting from, or based upon: Employee’s employment with Company, or the separation therefrom, and any employment practice, custom or policy of any of the Company Parties.

5. In consideration for the foregoing, the Company, its subsidiaries, their respective successors and assigns, and anyone claiming by or through the Company or any of its subsidiaries (collectively, the “Releasing Company Parties”) hereby irrevocably and unconditionally release and forever discharge Employee and his successors and assigns (collectively, the “Released Employee Parties”), from and against any and all manner of actions, liability, causes of action, claims, demands, contracts and attorney’s fees, which any of the Releasing Company Parties now may have or hold or at any time heretofore had or held, arising out of, existing by reason of, resulting from, or based upon: Employee’s employment with Company, the performance of Employee’s duties or the failure of Employee to properly perform such duties, including, without limitation claims by any of the Releasing Company Parties against the Released Employee Parties for indemnification or contribution for liability imposed by third party claims against the Releasing Company Parties.

6. Employee shall be entitled to the payment and other consideration described above only if Employee signs this Release and delivers it to the Company within twenty-one (21) days of receipt of this Release and does not revoke this Release within the revocation period described in paragraph 11 of this Release. Provided Employee signs and delivers this Release and does not thereafter revoke, the payment referred to in paragraph 1(a) above shall begin within ten (10) days after the Company receives this signed Release. By signing this Release and delivering it to the Company on or before April 28, 2006, the parties acknowledge that Employee has timely signed and delivered this Release to the Company.

7. Employee acknowledges and agrees that the claims released and discharged hereby include, but are not limited to, claims that have been or could be asserted under: (a) the Missouri Human Rights Act; (b) rights pursuant to Missouri Revised Statutes §287.780 and §290.140; (c) Title VII of the Civil Rights Act of 1964, as amended; (d) the National Labor Relations Act, as amended; (e) the Fair Labor Standards Act, (f) the Employee Retirement Income Security Act of 1974, as amended; (g) Sections 1981 through 1988 of Title 42 of the United States Code, as amended; (h) the Civil Rights Act of 1866; (i) the Civil Rights Act of 1871; (j) the Civil Rights Act of 1991; (k) the Americans with Disabilities Act of 1990; (l) the Rehabilitation Act of 1973; (m) the False Claims Act; (n) the Family and Medical Leave Act of 1993; (o) the Vietnam Era Veterans’ Readjustment Assistance Act of 1974, or any replacement acts; (p) the Immigration Reform Control Act, as amended; (q) the Occupational Safety and Health Act, as amended; (r) the Workers’ Adjustment and Retraining Notification Act, as

amended; (s) the Older Worker Benefit Protection Act; (t) the Age Discrimination in Employment Act (u) the Sarbanes-Oxley Act of 2002; (v) any other federal, state, municipal, or local law, constitution, statute, regulation, ordinance, executive order, decision or common law claim concerning employment, wages, hours of work, labor relations, employment relations, fair employment practices, fair credit reporting, human rights, civil rights, service letters, occupational safety and health, discrimination in employment, or termination of employment including, without limitation, any claim for wrongful termination, retaliation, or any other aspect of employment brought under Missouri statutory or common law; any one or more of causes of action, complaints, charges, or rights enforceable in any forum, whether a court or an administrative agency; (w) any claim for vacation, sick or personal leave pay or payment pursuant to any practice, policy, handbook or manual of the Company (x) any and all claims for personal injury, emotional distress, libel, slander, defamation, and other physical, economic, or emotional injury; (y) any public policy, contract (express, written or implied) except for this Release, tort, or common law; and (z) any allegation for any one or more of the Employee’s indebtedness, claims, damages, causes of action, suits for legal or equitable relief, costs, attorneys’ fees, or liabilities of every nature and description and either direct or consequential. Employee does not hereby waive any rights or claims that may arise after the date Employee signs this Release. In addition, Employee does not release any claims for medical treatment for worker’s compensation claims for injuries arising prior to execution of this Release or for any claim to enforce the terms of this Release.

8. Employee agrees not to disparage the management, employees, business or products of the Company or any of the Company Parties in any manner. The Company parties agree not to disparage the Employee Parties or Employee’s family in any manner.

9. Employee shall hold in a fiduciary capacity for the benefit of the Company all secret or confidential information, knowledge or data relating to the Company and its customers and suppliers, which shall have been obtained by Employee during Employee’s employment with the Company and which shall not be or become public knowledge (other than by acts by Employee or Employee’s representatives in violation of this Agreement). Employee shall not, without the prior written consent of the Company, communicate or divulge any such information, knowledge or data to anyone other than the Company and those designated by it. Following the expiration of the Severance Period, Employee shall continue to be obligated under this paragraph not to use or to disclose secret or confidential information of the Company so long as it shall remain proprietary or protectable as confidential or trade secret information.

10. Employee agrees that, during the Severance Period, he will, without further compensation, be available to assist the Company as reasonably requested by the Company at mutually agreeable time(s) in the metropolitan St. Louis area regarding activities pertaining to his prior responsibilities with the Company, not exceeding twenty-four (24) hours per calendar month, and do such other things as are reasonably requested by the Company to provide for an orderly transition of his employment responsibilities. In addition, during the Severance Period, Employee agrees to assist the Company, and if necessary to testify through a deposition or at trial, with respect to matters related to periods during which he was employed by the Company. The Company agrees that any services under this paragraph 10 will be requested in a manner that will not unreasonably interfere with Employee’s then current employment. Any services provided by Employee in excess of twenty-four (24) hours per calendar month shall be compensated at the rate of $100.00 per hour, less required withholdings.

11. Employee acknowledges that Employee has been advised to seek an attorney for advice regarding the effect of this Release prior to signing it. Employee also acknowledges that Employee was offered and was advised that Employee could take up to twenty-one (21) days to study this Release before signing it. Employee understands that Employee has the right to revoke this Release for seven (7) days after signing by providing written notification to Darlene Schroeder, Vice President—Human Resources at 555 Maryville University Drive, Suite 200, St. Louis, Missouri, 63141. In the event that Employee revokes this Release during such 7-day period, this Release shall be null and void in its entirety and all of the Company’s obligations hereunder shall cease immediately.

12. Employee agrees that his request for a service letter under Missouri Revised Statute Section 290-140 is hereby withdrawn.

13. Employee acknowledges that Employee has read the entire contents of this Release, understands all of its terms, and has executed it voluntarily with full knowledge of its significance. Employee represents and warrants that no other consideration has been promised to Employee for executing this Release other than as described in paragraph 1 above, and that no attorney or counsel is entitled to any fees as a result of this Release.