Driwall Protection Board is a waterproofing protection and drainage mat that is used after applying the waterproofing membrane to its exterior walls to prevent damage when backfilling. At 1/8-in. thick, 4 ft. wide, and comes in a 200-sq.-ft. roll, this product is flexible for easy installation, and its recycled core can withstand the worst backfilling conditions. Keene Building Products. 877-514-5336. www.keenebuilding.com