Document And Entity Information - USD ($)	12 Months Ended
	Oct. 30, 2016	Dec. 28, 2016	May 01, 2016
Document Information [Line Items]
Document Type	10-K
Amendment Flag	false
Document Period End Date	Oct. 30, 2016
Document Fiscal Year Focus	2016
Document Fiscal Period Focus	FY
Entity Registrant Name	NCI BUILDING SYSTEMS INC
Entity Central Index Key	0000883902
Current Fiscal Year End Date	--10-30
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Filer Category	Accelerated Filer
Entity Public Float			$ 418,251,380
Trading Symbol	NCS
Entity Common Stock, Shares Outstanding		70,875,084