#2290 • (16) 4'x4' EnergyGuard Ultra Taper Z Insulation Sheets Part of 20,449 Sq Ft of Shaw Glue Down Flooring & GAF EnergyGuard Polyiso Insulation (167839) (timed auction by Bid-2-Buy) Status: Sold 2.5" - 3.5" 25 PSI (16) Pieces = 256 Sq. Ft.