Mineral wool board is a high-temperature insulation that is composed of inorganic fibers derived from a volcanic rock. Mineral wool board is hydrophobic, helping prevent against rot, corrosion, and mildew. Additionally, it is highly fire-resistant and can be used in firestop applications and in temperatures up to 1200°F. Mineral wool board insulation can be used in commercial roofs, basement walls, and other building envelope applications. It is extensively used in industrial processes. Mineral wool board is available in a variety of densities and thicknesses from 1” to 4”. Distribution International supplies mineral wool board insulation from top manufacturers such as Johns Manville, Owens Corning, and Rockwool. Browse our selection below!