$61.99 R10 1 1/2 in x 4 ft x 8 ft Johns Manville AP Foil Faced Foam Sheathing at GTS Interior Supply
Shop Extruded Polystyrene Foam Board Insulation (Common: 1-in x 8-ft x 2-ft; Actual: 0.937-in x 
Cellofoam 1-1/2 in. x 4 ft. x 8 ft. R-5.9 Polystyrene Foam Insulation Board-125755 - The Home Depot
