Document And Entity Information - shares	3 Months Ended
	Jan. 28, 2018	Feb. 27, 2018
Document And Entity Information [Abstract]
Entity Registrant Name	NCI BUILDING SYSTEMS INC
Entity Central Index Key	0000883902
Trading Symbol	NCS
Current Fiscal Year End Date	--10-28
Entity Filer Category	Accelerated Filer
Document Type	10-Q
Document Period End Date	Jan. 28, 2018
Document Fiscal Year Focus	2018
Document Fiscal Period Focus	Q1
Amendment Flag	false
Entity Common Stock, Shares Outstanding		66,142,248