<div>Every piece measures 48 in L x 15 in W x 2 1/2 in H. One package covers up to 140 sq. ft. Its flexibility makes it easy to handle and install in walls, attics, basements and ceilings. This product maintains the heating and cooling properties of your home for improved energy efficiency. Comprising sand and glass, this moisture-resistant material prevents mould and mildew growth. For added safety, the Johns Manville insulation's composition also makes it fire resistant. The GREENGUARD-certified insulation product is formaldehyde-free for indoor air quality. As a green material, this R-8 insulation has an ECOLOGO certificate as proof of its recycled content.</div>