Required Thickness Coverboard Roof

Dens deck provides an excellent substrate for all types of conventional low slope roofing membranes particularly in fully adhered assemblies.

Required thickness coverboard roof.

Over the roof deck. 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. Securock products are available in thicknesses of 3 8 and 5 8. Physical properties listed above are presented as typical average values as determined by accepted astm test methods and are subject to normal manufacturing.

Codes exempt foam plastic insulation when used in fm 4450 or ul 1256. The material is durable and provides superior impact and puncture resistance. Meets the requirements of astm c 1177. Fm class 1 for fire barrier requirements and ul class a unlimited slope with excellent surface burning characteristics.

Tested in accordance with astm e84 its surface burning characteristics are flame spread 0 and smoke developed 0. The boards are manufactured in standard sizes of 4 feet by 8 feet and an average thickness of 3 8 inch. This significantly increases the time required to melt the insulation which adds fuel to the flames. The cover board also serves as a substrate for a vapor retarder in this application.

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