Polyiso Foam Board R Value

And nrca s r value recommendations associated with the use of polyisocyanurate insulation used in roof systems. R value chart for enerfoil tm rigid foam faced insulation conditioned per atsm c1289 test method astm c518 1 2. R 3 2 polyisocyanurate rigid foam insulation board r matte plus 3 thermasheath 3 is rigid foam r matte plus 3 thermasheath 3 is rigid foam plastic thermal insulation board.

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This is an even more dense and more expensive foam board insulation.

Polyiso foam board r value.

Cost polyiso is the most expensive of the foam board insulation products however it s the highest r value. The other is a tri plex facer consisting of a three ply laminate of durable kraft. Polyiso is unique in that the r value increases with the thickness of the foam so three inches of polyiso has a higher r value per inch than two inches. R panel is manufactured with a closed cell polyisocyanurate foam core bonded to fiberglass reinforced facers and designed for use over metal nailable and non nailable roof decks with a variety of membrane systems.

On tuff r insulation one facer is a continuous sheet of aluminum foil. Johns manville r panel rigid roof insulation board offers r values of up to r 23 6 providing high thermal efficiency. Let s use the r value of iko s polyiso insulation enerfoil tm as an example. What is polyiso insulation.

1 2014 industry issue update polyiso s r value provided an overview of the theory of foam aging. Polyisocyanurate polyiso is a closed cell rigid foam board insulation that is bonded to facers on both sides which are composed of various organic and inorganic materials. Polyisocyanurate polyiso is a closed cell rigid foam insulation board made with recycled content that is widely used in commercial roofing. Polyiso is used in roof wall ceiling and specialty applications within commercial and residential buildings of all types.

Tuff r polyisocyanurate insulation consists of high performance high r value closed cell polyisocyanurate foam core boards sandwiched between a choice of durable exterior foil facers. It s made of environmentally sound closed cell polyisocyanurate foam bonded to a durable white matte non glare aluminum facer and a reflective reinforced aluminum facer. Polyiso has a high r value per inch compared to other insulation products. The r value test method and the long term thermal resistance lttr methodol ogy.

Polyiso comes in several thicknesses and is used over house sheathing underneath siding or in attic spaces where its reflective properties are. Rmax r matte plus 3 1 2 in. Polyiso insulation is the best choice as a cost effective energy efficient and environmentally responsible insulation product. Polyurethane and polyisocyanurate are both closed cell foams.

It provides an r value of 6 per inch of thickness and often comes foil faced to help reflect radiant heat. They contain low conductivity gases in the cells usually one of the hcfc or cfc gases.

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