CertainTeed FlintBoard ISO Polyisocyanurate Roof Insulation features a closed-cell polyiso core integrally laminated to heavy, black (non-asphaltic), fiber-reinforced felt facers. FlintBoard ISO is marked on one side for use with hot applied systems and is unmarked on the opposite side for use with single ply systems, making this a universally adaptable product, suitable for a variety of applications. FlintBoard ISO is also available in 25-psi formula.
FlintBoard ISO is specifically recommended for hot asphalt or coal tar BUR, modified bitumen, metal and single-ply membrane systems. It is available in a variety of thicknesses, in 4' x 4' or 4' x 8' panels.
FlintBoard ISO is the recommended roof insulation in conjunction with CertainTeed Commercial Roofing Systems including Flintlastic® Roof Systems.