Spray Foam Roof Assemblies

Spfa 130 spray polyurethane foam roofing updated spf roofing brochure the high performance cost effective weather resistant solution for commercial industrial and residential structures.

Spray foam roof assemblies.

Open cell spray polyurethane foam or closed cell spray polyurethane foam ccspf insulation can be sprayed along the underside of the roof sheathing to provide a conditioned and insulated attic space that can be durable and efficient in. A spray foam roof can be the last roofing system you ll ever need on a building. Or 25 mm minimum thickness and vapor retarder at 2 in. Two layers are preferable to one layer due to increase in air flow resistance.

Unvented roofs with spray foam applied to the underside of the roof deck have been used since the mid 1990s. Since a spray foam system consists of spray foam coating and granules after 10 20 years some of the coating and granules will naturally wear away. At year 10 20 a contractor will add more coating and granules. Layers of rigid insulation have staggered joints to facilitate airtightness.

Image courtesy of d7 spray foam insulation houston tx. R 46 unvented roof assembly two layers of r 6 5 inch rigid insulation yielding a total combined thickness of 2 5 inches. On exterior spray foam roofing applications the roof sealing foam should be coated with a white roof coating after curing. Closed cell spray foam acts as an air barrier at 1 in.

Spf roof patch spray foam is commonly used for sealing and insulating roof systems. Looking upward through the open ceiling if the exterior wall and roof deck assemblies both contain spray foam then a continuous insulation and airtight layer is established from the base of the walls to the peak of the roof. A very energy efficient enclosure results. Unvented roof assemblies with ccspf work well in all climate zones and serve several important functions.

There is no potential for condensation until interior moisture levels exceed 45 rh at 70 f during the coldest month. If you don t want to use sips or nailbase read this article tolearn the four basic approaches to insulating unvented roof assemblies. Unvented roof assemblies should be insulated either with air impermeable insulation rigid foam or spray polyurethane foam or with a combination of foam and air permeable insulation. The foam never gets touched and never loses r value.

Icynene s products can be used in fire compliant assemblies noted in the requirements of chapter 26 of the international building code icynene spray foam insulation products have the flame spread and smoke developed indexes required have been tested in accordance with and comply with the acceptance criteria of nfpa 285 and there are many wall and ceiling assemblies that contain icynene.