Required Thickness Coverboard Roof

5 8 thickness meets the requirements of type x per astm c 1177.

Required thickness coverboard roof. Dens deck provides an excellent substrate for all types of conventional low slope roofing membranes particularly in fully adhered assemblies. The cover board also serves as a substrate for a vapor retarder in this application. Densdeck roof boards are fm tested and approved as the only 1 2 gypsum product to meet the calorimeter requirements for conventionally insulated decks. The material is durable and provides superior impact and puncture resistance.

Coated fiberglass facer ideal for fully adhered systems provides a broader compatibility and higher performance with roofing adhesives. Fm class 1 for fire barrier requirements and ul class a unlimited slope with excellent surface burning characteristics. Over the roof deck. Securock products are available in thicknesses of 3 8 and 5 8.

Codes exempt foam plastic insulation when used in fm 4450 or ul 1256. It provides exceptional bond and low absorption in adhered systems and offers sustainable design for all types of roofing systems including single ply fluid applied built up spray foam metal and modified bitumen roofing. Meets the requirements of astm c 1177. The boards are manufactured in standard sizes of 4 feet by 8 feet and an average thickness of 3 8 inch.

Flame spread index of 75 and smoke development 450 meet code requirements for foam plastic roof insulation. In this application the cover board provides a fire barrier in the case of an internal fire.