Core Natural Resources 8-K/A Completion of Acquisition or Disposition of Assets

Exhibit 23.1

CONSENT OF INDEPENDENT AUDITOR

We consent to the incorporation by reference of our reports dated March 29, 2012, with respect to the financial statements of Metl-Span LLC, included in the Current Report (Form 8-K) dated June 5, 2012 and incorporated in this Current Report (Form 8-K/A) as of and for the years ended June 30, 2011 and 2010 in the following registration statements and related prospectuses.

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. 333-176737
NCI Building Systems, Inc. Form S-8	File No. 333-124266
NCI Building Systems, Inc. Form S-8	File No. 333-14957
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. 333-12921
NCI Building Systems, Inc. Form S-8	File No. 333-111142
NCI Building Systems, Inc. Form S-8	File No. 333-139983
NCI Building Systems, Inc. Form S-8	File No. 333-162568
NCI Building Systems, Inc. Form S-8	File No. 333-166279
NCI Building Systems, Inc. Form S-3	File No. 333-156448

/s/ McGLADREY LLP

Dallas, Texas

August 31, 2012