Spray Foam Insulation Low Slope Roof

The movement of air into indirect conditioning of an unvented attic is a slow gradual process that will not be noticeable by occupants and typically will not put any strain on the hvac system.

Spray foam insulation low slope roof. Lightweight insulating concrete lwic. Murmurs and hearsay about open cell spray foam insulation have been gaining traction for a while. Spray foam roof in philadelphia martin i am getting bids for spray foam for an unvented low slope roof in philadelphia zone 4. The rapid growth of sprayed foam insulation in building construction thanks in part to its immediate and long term.

Dual purpose structural deck and insulating planks. Insulfoam single ply sp fire rated single ply roof insulation with factory laminated glass facer. Whatever your roofing or insulation need kohls can help. Or sprayed polyurethane foam spf.

Although spray foam insulation has been in use since the 1940s primarily for aircraft for the past 30 years continual product innovation has seen the increased adoption of spray foam insulation in residential and commercial construction. It is made from. Not long ago someone even told me that in florida roofing companies won t let their workers go up on roofs with open cell spray foam because the roofs are so spongy the guys fall right through. But spray foam insulation used at the underside of the roof deck would need to be covered by a thermal barrier and intumescent coatings are commonly used.

It rots roofs people have told me. For a contractor you can trust contact kohls foam systems for a free estimate. Again the thickness or thermal resistance of the high density closed cell spray foam is specified by the international residential code irc based on climate zone. If you install a combination of closed cell foam and vapor permeable insulation you also need to be sure that the foam is thick enough to keep the roof sheathing or the lower surface of the foam insulation above the dew point during the winter.

In many ways it s easier to build an unvented low slope roof and there are several ways to do it. Most low slope roof construction using spray foam use a hybrid approach where a combination of high density closed cell spray foam is used with fiberglass or cellulose insulation. I was leaning towards doing around 2 5 in of closed cell for an r15 and doing r30 in fiberglass batts on top. Most of the spf contractors i speak with are pushing 10 inches of open cell to reach r38 in the roof assembly.

Rigid board insulation rigid board insulation is the most common type of insulation used in low slope commercial roofing. The insulation used in low slope roof assemblies typically falls into one of the four categories.