Exhibit 23.1
CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
We consent to the incorporation by reference in the following Registration Statements:
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| NCI Building Systems, Inc. Form S-8 | | File No. 333-186467 |
| NCI Building Systems, Inc. Form S-8 | | File No. 333-176737 |
| NCI Building Systems, Inc. Form S-8 | | File No. 333-193057 |
| NCI Building Systems, Inc. Form S-8 | | File No. 333-173417 |
| NCI Building Systems, Inc. Form S-8 | | File No. 333-172822 |
| NCI Building Systems, Inc. Form S-8 | | File No. 333-166279 |
| NCI Building Systems, Inc. Form S-8 | | File No. 333-162568 |
| NCI Building Systems, Inc. Form S-8 | | File No. 333-139983 |
| NCI Building Systems, Inc. Form S-8 | | File No. 333-124266 |
| NCI Building Systems, Inc. Form S-8 | | File No. 333-111142 |
| NCI Building Systems, Inc. Form S-8 | | File No. 333-111139 |
| NCI Building Systems, Inc. Form S-8 | | File No. 333-34899 |
| NCI Building Systems, Inc. Form S-8 | | File No. 333-14957 |
| NCI Building Systems, Inc. Form S-8 | | File No. 333-12921 |
| NCI Building Systems, Inc. Form S-3 | | File No. 333-210467 |
of our reports dated December 18, 2017, with respect to the consolidated financial statements of NCI Building Systems, Inc. and the effectiveness of internal control over financial reporting of NCI Building Systems, Inc. included in this Annual Report (Form 10-K) of NCI Building Systems, Inc. for the year ended October 29, 2017.
/s/ Ernst & Young LLP
Houston, Texas
December 18, 2017
