#2250 • (64) 4'x4' EnergyGuard NH Taper AA Insulation Sheets Part of GAF EnergyGuard Polyiso Insulation: 4'x4' and 4'x8' (163709) (timed auction by Bid-2-Buy) Status: Sold .5" - 1" 20 PSI (64) Pieces = 1024 Sq. Ft.