100 sq. ft. Roll, 25 ft. x 4 ft. x 3/32 in., Serenity Foam Underlayment for Laminate Flooring 100 sq. ft. coverage with roll measuring 25 ft. x 4 ft. x 3/32 in To be used for wood subfloors Can also be used with concrete slabs with recommended Moisture Barricade (Item# 70-115, sold separately) For use under laminate and engineered wood flooring Can be used over radiant heated floors