How thick is a Dura-Foam roof?
Dura-Foam roofs are a minimum of 1″ thick on most commercial and residential roofs. Standard thickness over occupied areas on residential roofs usually is a minimum of 1.5″. Thickness may be greater to meet insulation or drainage requirements. For example, new construction requiring minimum R19 insulation receives 3.5″ of polyurethane foam over the occupied areas. Roofs with low areas will receive additional material to displace areas of problematic standing water. For example, an area on a roof where ponds are 2″ deep could have about 2.5″ of additional material applied to displace major amounts of ponding water. The coating layers that protect the underlying polyurethane foam are not included in the total roof thickness because these layers are relatively thin.
