Owens Corning Thermafiber UltraBatt R 15 3.5" x 15" x 47" Storage Organization Hooks ensuring your floors stay beautiful ensuring your floors stay beautiful for years Item Weight 40 Door Handing Bi Parting Color Family Unfinished Texture Type Smooth Product Weight (lb A: The R value of this product is 15 5 inches Length 47 inches Width 15 inches Features Faced Unfaced Unfaced For Use in Walls Yes Fits 2 x 4 Walls Yes For Use in Windows No Fits 2 x 6 Walls No Formaldehyde Free No For Use in Attics No Framing Type Wood studs For Use in Basements No Insulation Type Mineral wool For Use in Ceilings Yes Maximum R Value 15 For Use in Crawlspaces No Multi Pack Quantity N A For Use in Doors No Package Count 1 For Use in Duct No Package Type Multi pack For Use in Electrical No Pallet Quantity N A For Use in Floors Yes R Value per Inch 15 For Use in Garage Doors No Sound Barrier No For Use in Masonry No Stud Spacing 16 inches For Use in Plumbing No Total Package Quantity 6 For Use in Vents No Vapor Retardant No Warranty Warranty 3 year limited Frequently Asked Questions (FAQ)