<SEC-DOCUMENT>0000883902-21-000027-index.html : 20210601
<SEC-HEADER>0000883902-21-000027.hdr.sgml : 20210601
<ACCEPTANCE-DATETIME>20210601135212
ACCESSION NUMBER:		0000883902-21-000027
CONFORMED SUBMISSION TYPE:	SD
PUBLIC DOCUMENT COUNT:		2
<RULE>
<RULE-NAME>13p-1
<ITEM>
<ITEM-NUMBER>1.01
<ITEM-PERIOD>20201231
</ITEM>
</RULE>
FILED AS OF DATE:		20210601
DATE AS OF CHANGE:		20210601

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:		SD
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-14315
		FILM NUMBER:		21984448

	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>SD
<SEQUENCE>1
<FILENAME>cnr20210601sd.htm
<DESCRIPTION>SD
<TEXT>
Document 1 - file: cnr20210601sd.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>2
<FILENAME>cornerstonebbtmlogocmykfula.jpg
<TEXT>
Document 2 - file: cornerstonebbtmlogocmykfula.jpg

</DOCUMENT>
</SEC-DOCUMENT>