UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

 CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

Date of Report (Date of Earliest Reported Event): February 27, 2013 (February 26, 2013)

NCI BUILDING SYSTEMS, INC.

(Exact name of registrant as specified in its charter)

Registrant’s telephone number, including area code: (281) 897-7788

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

Item 5.07 Submission of Matters to a Vote of Security Holders.

NCI Building Systems, Inc. (“NCI” or the “Company”) held its Annual Meeting of Stockholders on Tuesday, February 26, 2013 (the “Annual Meeting”). The number of shares present in person and/or by proxy at such meeting was 71,805,945, representing approximately 96% of the 74,760,103 shares of capital stock issued and outstanding on January 15, 2013, which was the record date for the determination of the stockholders entitled to vote at the meeting. At the Annual Meeting, the stockholders of the Company (i) elected Gary L. Forbes, George Martinez, and Jonathan L. Zrebiec as Class II directors to serve until the annual meeting of stockholders to be held in 2016, (ii) approved the amendment and restatement of NCI’s 2003 Long-Term Stock Incentive Plan, and (iii) ratified the appointment of Ernst & Young LLP as the Company’s independent registered public accounting firm for the fiscal year ending November 3, 2013.

Of the 71,805,945 shares of capital stock of the Company present at the Annual Meeting, in person or by proxy, the following table shows the votes cast for and withheld from each of the nominees for director:

In addition to Messrs. Forbes, Martinez and Zrebiec, each of the following persons has a term of office as a director of the Company that continues after the Annual Meeting: Kathleen J. Affeldt, James G. Berges, Norman C. Chambers, John J. Holland, Lawrence J. Kremer and Nathan K. Sleeper.

The stockholders of the Company approved the 2003 Long-Term Stock Incentive Plan, as amended and restated by the following vote:

The stockholders of the Company ratified the appointment of Ernst & Young LLP as the Company’s independent registered public accounting firm for fiscal 2013 by the following vote:

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.