Foundation Blanket R-Value: 12 Dimensions: 4 ft. x 50 ft. Coverage: 200 sq. ft./bag Application: Concrete Basements Foundation Blanket is a convenient method for insulting concrete basements to code. Made with Owen's Corning Pink fiberglass insulation and 6 mil. vapor barrier, is quick and easy to install. As it's possible frame walls over the blanket, material and installation time is reduced considerably.