POWER OF ATTORNEY



       Know all by these presents, that the undersigned hereby constitutes and appoints

each of Norman C. Chambers, Todd R. Moore, Mark E. Johnson and Peter Talosig, or

either of them signing singly, and with full power of substitution, the undersigned's true

and lawful attorney-in-fact to:

(1) prepare, execute in the undersigned's name and on the undersigned's

behalf, and submit to the U.S. Securities and Exchange Commission (the

"SEC") a Form ID, including amendments thereto, and any other documents

necessary or appropriate to obtain codes and passwords enabling the

undersigned to make electronic filings with the SEC of reports required by

Section 16(a) of the Securities Exchange Act of 1934, as amended, or any

rule or regulation of the SEC;

(2) execute for and on behalf of the undersigned, in the undersigned's capacity

as an officer and/or director of NCI Building Systems, Inc. (the "Company"),

Forms 3, 4, and 5, and amendments thereto, in accordance with

Section 16(a) of the Securities Exchange Act of 1934, as amended, and the rules

thereunder;

(3) do and perform any and all acts for and on behalf of the undersigned which

may be necessary or desirable to complete and execute any such Form 3,

4, or 5, complete and execute any amendment or amendments thereto, and

timely file such form with the SEC and any stock exchange or similar

authority; and

(4) take any other action of any type whatsoever in connection with the

foregoing which, in the opinion of such attorney-in-fact, may be of benefit to,

in the best interest of, or legally required by, the undersigned, it being

understood that the documents executed by such attorney-in-fact on behalf

of the undersigned pursuant to this Power of Attorney shall be in such form

and shall contain such terms and conditions as such attorney-in-fact may

approve in such attorney-in-fact's discretion.

       The undersigned hereby grants to each such attorney-in-fact full power and

authority to do and perform any and every act and thing whatsoever requisite, necessary,

or proper to be done in the exercise of any of the rights and powers herein granted, as

fully to all intents and purposes as the undersigned might or could do if personally

present, with full power of substitution or revocation, hereby ratifying and confirming all

that such attorney-in-fact, or such attorney-in-fact's substitute or substitutes, shall lawfully

do or cause to be done by virtue of this power of attorney and the rights and powers

herein granted.  The undersigned acknowledges that the foregoing attorneys-in-fact, in

serving in such capacity at the request of the undersigned, are not assuming, nor is the

Company assuming, any of the undersigned's responsibilities to comply with Section 16

of the Securities Exchange Act of 1934.

       This Power of Attorney shall remain in full force and effect until the undersigned is

no longer required to file Forms 3, 4, and 5 with respect to the undersigned's holdings of

and transactions in securities issued by the Company, unless earlier revoked by the

undersigned in a signed writing delivered to the foregoing attorneys-in-fact.

       IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney to

be executed as of May 23, 2017.







                                                /s/ James S. Metcalf

                                                 Signature



                                                James S. Metcalf

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