Spray Foam Insulation Effect On Shingles

Asphalt shingles on a roof with insulation at the roof deck and no ventilation are hotter than shingles on a vented attic.

Spray foam insulation effect on shingles.

Shingle warranty after spray foam attic insulation. Spray foam insulation effect on a shingle roof. Benefits and pitfalls of spray foam insulation according to the us environmental protection agency epa spray foam is recognized as a premier alternative to the batt insulation of years past. If you ve never heard the phrase hot roof i m sure you ve heard of an unvented attic.

White shingles were found to be 20 to 23 cooler than black shingles. The north slope of a roof was 8 7 cooler than the south roof. Serving as both an air sealant and an insulator spray foam is estimated to reduce the standard hvac sizing by about 35 on average. Rigid iso or ps foam insulation installed over a solid deck and covered with an approved deck osb plywood etc.

Polystyrene ps with the foam insulation factory adhered to the underside of osb or plywood. That is using traditional building techniques spray foam should be installed after the rough plumbing electrical wiring and heating and air conditioning ducts have been installed but before the interior walls are. Spray foam insulation is professionally installed at the same point in the construction cycle as other types of insulation. Ventilation lowered shingle temperature 2 7.

Spray foam insulation applied to the underside of the roof deck will prevent free flow of air on the bottom side of the deck and the associated dissipation of heat that occur with a traditional vented attic construction. Spray polymer foam spf available in closed cell and open cell forms. Many homeowners opt to seal and. Fsec did a literature review of the research on the need for attic ventilation and found that shingle temperatures are slightly higher but lifetime is not much lower.

Will use of below deck spray foam insulation affect my fiberglass asphalt shingles.