A cover board is a rigid panel installed between the insulation layer and the roof membrane in a commercial roofing assembly. Its job is to protect the softer insulation from damage during installation and from the concentrated loads that come with foot traffic, hail, and rooftop equipment. Cover boards also provide a firmer, more consistent substrate for the membrane to bond to, which improves the quality and durability of the finished installation.
Without a cover board, membrane punctures from dropped tools, mechanical equipment, and routine maintenance foot traffic are common. A single puncture in a commercial roof membrane that goes undetected can allow water intrusion for months before interior signs appear. Cover board materials include high-density polyiso, gypsum-fiber board, and wood-fiber board, each selected based on the membrane type, fire rating requirements, and anticipated roof traffic.
Sentry Roofing specifies cover boards on commercial projects where membrane protection and long-term performance are priorities. We match the cover board material to your membrane system and local fire code requirements.
Ready to add this to your building? Request an evaluation from Sentry Roofing and we will put together a solution for your facility.
