Builder board contractor grade construction board. Heavy-duty, reusable temporary floor protection that is approximately 22 mil. thick. Less expensive and 1/3 the weight of 1/8 In. masonite. Allows moisture and vapors to escape and will not stain. Easy-to-install, lays flat, and can be seamed together. 100% recyclable and made from at least 33% post consumer material with Liquid Shield . Protects: Hardwood, granite, travertine, marble, terrazzo, stone, carpet, linoleum, and more. Earn USGBC Certified Leed's points for material and resources: Credit 2.1 or 2.2.