Nailable Base-3, an all-in-one roof insulation and nailing surface, has a OSB nailing panel bonded to a polyiso foam board with glass fiber/organic mat facers. It is designed for use with concrete, slate or clay roofing tiles, as well as wood shakes, asphalt shingles and metal panel roofing systems. Rmax Nailable Base-3 is an energy efficient thermal insulation board bonded to a nailing panel.