Johns Manville R-6 1-in x 4-ft x 8-ft AP Foil Faced Polyisocyanurate For Use in Garage Doors Board Insulation 90034729

AP foil-faced polyiso foam sheathing provides continuous insulation for maximum efficiency, as well as exceptional moisture, heat and air control. It features a reflective foil facer on one side and a nonreflective facer on the other.