#2311 • (24) 4'x4' Paratherm CGF Taper Y Insulation Sheets Part of GAF EnergyGuard Polyiso Insulation: 4'x4' and 4'x8' (163709) (timed auction by Bid-2-Buy) Status: Sold 1.5" - 2.5" 20 PSI (24) Pieces = 384 Sq. Ft.