Property, Plant and Equipment (Details 1) - USD ($) $ in Thousands	12 Months Ended
	Feb. 27, 2021	Feb. 29, 2020
Property, Plant and Equipment [Line Items]
Restructuring Reserve, Beginning balance	$ 4,217	$ 0
Restructuring expense	5,835
Payments	(879)
Other adjustments	(739)
Restructuring Reserve, Ending Balance	4,217	0
Architectural Framing Systems
Property, Plant and Equipment [Line Items]
Restructuring Reserve, Beginning balance	3,826	0
Restructuring expense	5,281
Payments	(716)
Other adjustments	(739)
Restructuring Reserve, Ending Balance	3,826	0
Corporate and other
Property, Plant and Equipment [Line Items]
Restructuring Reserve, Beginning balance	391	0
Restructuring expense	554
Payments	(163)
Other adjustments	0
Restructuring Reserve, Ending Balance	$ 391	$ 0