Document and Entity Information - USD ($)	12 Months Ended
	Dec. 30, 2017	Mar. 01, 2018	Jul. 01, 2017
Document and Entity Information [Abstract]
Entity Registrant Name	BlueLinx Holdings Inc.
Entity Central Index Key	0001301787
Trading Symbol	bxc
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Current Fiscal Year End Date	--12-30
Entity Filer Category	Smaller Reporting Company
Entity Well-Known Seasoned Issuer	No
Entity Common Stock, Shares Outstanding		9,143,596
Entity Public Float			$ 45,683,511
Document Type	10-K
Document Period End Date	Dec. 30, 2017
Amendment Flag	false
Document Fiscal Year Focus	2017
Document Fiscal Period Focus	FY