#2289 • (13) 4'x8'x3.5" Paratherm ISO Panel G Insulation Sheets Part of GAF EnergyGuard Polyiso Insulation: 4'x4' and 4'x8' (163709) (timed auction by Bid-2-Buy) Status: Sold 3.5" 20 PSI (13) Pieces = 416 Sq. Ft.