Polyisocyanurate Insulation In Attic

A polyiso continuous insulation system keeps energy and heat loss to a minimum increasing the building s energy efficiency and leading to lower monthly operating costs.

Polyisocyanurate insulation in attic.

By blocking thermal bridging a polyiso continuous insulation system increases the overall thermal performance of a wall assembly and a building. The attics are about as simple as can be with no dormers or other obstructions. R 13 1 polyisocyanurate rigid foam insulation board. Rmax thermasheath 3 2 in.

Compressive strength refers to the ability of a rigid foam plastic board to resist deformation and maintain its shape when subjected to a force or load. Polyisocyanurate insulation is a type of insulated foam board that offers a high level of thermal resistance and cold weather protection for your home. A 1 5 inch thick polyiso panel is rated r 9 that s almost double the rating per inch of typical attic insulations. R 6 polyisocyanurate rigid foam insulation board.

Polyisocyanurate insulation costs more than other types of foam board but can help to save you thousands of dollars in electrical heating and cooling costs. As a spray foam alternative i m considering using continuous rigid foam along the 32ft long x 7ft slope in my side attic and just spray foaming in the lower joist bays and places where taping is difficult. I will need 8 of polyiso to meet my disired r value r 48 while keeping the 2x4 rafter bays wide open for. Polyisocyanurate board insulation is most commonly supplied as 1 2 x 2 4 m or 1 2 x 2 7 m 4 x 8 ft or 4 x 9 ft sheets in various thicknesses.

Ideally your attic hatch insulation will match roughly the r value of the rest of the attic insulation so the almost double value provides a handy guide to the thickness of your polyisocyanurate insulation. These facings provide strength improve rigidity and enhance thermal performance.