<SEC-DOCUMENT>0000883902-21-000032-index.html : 20210622
<SEC-HEADER>0000883902-21-000032.hdr.sgml : 20210622
<ACCEPTANCE-DATETIME>20210622170926
ACCESSION NUMBER:		0000883902-21-000032
CONFORMED SUBMISSION TYPE:	11-K
PUBLIC DOCUMENT COUNT:		3
CONFORMED PERIOD OF REPORT:	20201231
FILED AS OF DATE:		20210622
DATE AS OF CHANGE:		20210622

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Cornerstone Building Brands, Inc.
		CENTRAL INDEX KEY:			0000883902
		STANDARD INDUSTRIAL CLASSIFICATION:	PREFABRICATED METAL BUILDINGS & COMPONENTS [3448]
		IRS NUMBER:				760127701
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		11-K
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-14315
		FILM NUMBER:		211036165

	BUSINESS ADDRESS:	
		STREET 1:		5020 WESTON PARKWAY
		STREET 2:		SUITE 400
		CITY:			CARY
		STATE:			NC
		ZIP:			27513
		BUSINESS PHONE:		(888) 975-9436

	MAIL ADDRESS:	
		STREET 1:		5020 WESTON PARKWAY
		STREET 2:		SUITE 400
		CITY:			CARY
		STATE:			NC
		ZIP:			27513

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	NCI BUILDING SYSTEMS INC
		DATE OF NAME CHANGE:	19930328

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	NATIONAL COMPONENTS INCORPORATED
		DATE OF NAME CHANGE:	19600201
</SEC-HEADER>
<DOCUMENT>
<TYPE>11-K
<SEQUENCE>1
<FILENAME>cnr2020123111-k.htm
<DESCRIPTION>11-K
<TEXT>
Document 1 - file: cnr2020123111-k.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-23.1
<SEQUENCE>2
<FILENAME>cnr2020123111-kexh231.htm
<DESCRIPTION>EX-23.1
<TEXT>
Document 2 - file: cnr2020123111-kexh231.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-23.2
<SEQUENCE>3
<FILENAME>cnr2020123111-kexh232.htm
<DESCRIPTION>EX-23.2
<TEXT>
Document 3 - file: cnr2020123111-kexh232.htm

</DOCUMENT>
</SEC-DOCUMENT>