Firestone HD Cover Board is a (12.7 mm) thick polyiso insulation designed for use as a cover board. It is a high density, closed-cell, polyisocyanurate foam core that has been manufactured with a coated glass facer. HD provides the highest thermal performance when compared to other 12.7mm roof cover boards. HD Cover Boards use EPA accepted blowing agents, which incorporates a HCFC-free blowing agent that does not contribute to the depletion of the ozone (ODP-free).
For installation over ARDEX insulation before application of ARDEX Waterproofing Membranes.