Envirosheet - Under-Concrete - R10 - (with bottom drainage grooves) 8 sheets kit (each sheet 2 3/8 in. x 2ft. x 4 ft.) - total coverage 64 sq.ft., is a special High-Density EPS foam product designed for applications which require fresh concrete to come directly in contact with the insulation, where low water absorption and high strength are the key. Ideal applications include basement walls, frost protection for foundations and footings, under any type of on-grade or below-grade slabs, pads, or sidewalks. All sheets are 24 in. x 48 in. x 2 3/8 in. thick, which allow fast easy installation in even tight locations like basements and crawl spaces, and they can be transported in any regular car due to the convenient package size.