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The other is a tri plex facer consisting of a three ply laminate of durable kraft.
Polyiso foam board r value. Polyiso has a high r value per inch compared to other insulation products. 1 2014 industry issue update polyiso s r value provided an overview of the theory of foam aging. Johns manville r panel rigid roof insulation board offers r values of up to r 23 6 providing high thermal efficiency. It provides an r value of 6 per inch of thickness and often comes foil faced to help reflect radiant heat.
Polyiso comes in several thicknesses and is used over house sheathing underneath siding or in attic spaces where its reflective properties are. On tuff r insulation one facer is a continuous sheet of aluminum foil. 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 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 is used in roof wall ceiling and specialty applications within commercial and residential buildings of all types. 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. 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.
They contain low conductivity gases in the cells usually one of the hcfc or cfc gases. Let s use the r value of iko s polyiso insulation enerfoil tm as an example. 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.
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. And nrca s r value recommendations associated with the use of polyisocyanurate insulation used in roof systems. The r value test method and the long term thermal resistance lttr methodol ogy. Cost polyiso is the most expensive of the foam board insulation products however it s the highest r value.
R value chart for enerfoil tm rigid foam faced insulation conditioned per atsm c1289 test method astm c518 1 2. Rmax r matte plus 3 1 2 in.
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