DensDeck® Prime is a trusted and durable roof substrate that can be used in virtually any commercial roofing system. DensDeck® Prime can mitigate the risk from fire, foot traffic, and hail dmage, helping to add lifespan to the roofing system. DensDeck® panels’ superior dimensional stability over competitive gypsum fiber boards is due to their low coefficient of thermal and hygrometric expansion. DensDeck® panels used as cover boards do not need to be gapped when installed.