$69.99 Owens Corning FOAMULAR 1/2 in. x 4 ft. x 8 ft. R-3 Squared Edge Insulating Sheathing-36L - The 
R-Tech 1-1/2 in. x 2 ft. x 4 ft. R-5.78 Rigid Foam Insulation-321355 - The Home Depot
Reviews for 2 in. x 4 ft. x 8 ft. Foam Insulation - DE500 - The Home Depot
