Certiguard 80 Sq. Ft. 40.5 In. W 25.7 Ft. 0.7 Mm Premium Underlayment for Engine
This 100% waterproof subfloor can hold up to 6,600 lbs. per sq. ft., supporting your floor and any other heavy object you place on it. It has a low profile of 16/0.8 in to maximize headspace. A 500 sq. ft. room can be completed in a matter of hours.