R-10 High Density Expanded Polystyrene Foam Board Insulation 2-3/8" x 4' x 8'

Expanded polystyrene holds 100% of its R-value over the life of the product. High-density expanded foam board is perfect for under concrete slab applications or foundation side walls. It's ideal for laying an in-floor heat tubing onto prior to pouring concrete. It's easy to cut with a utility knife or hot wire.

Made in the U.S.A.