Polyisocyanurate Foam Board R Value

Polyiso has a high r value per inch compared to other insulation products.

Polyisocyanurate foam board r value.

This material offers the highest r values about r 6 to 6 5. 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. They contain low conductivity gases in the cells usually one of the hcfc or cfc gases. This is an even more dense and more expensive foam board insulation.

It provides r values that range from 3 6 to 4 2 per inch. See also material data sheet msds 1511 or msds 1911. 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.

It provides about r 5 per inch. Polyurethane and polyisocyanurate are both closed cell foams. Polyiso is used in roof wall ceiling and specialty applications within commercial and residential buildings of all types. What is polyiso insulation.

1 when joints penetrations detailed appropriately. Johns manville r panel rigid roof insulation board offers r values of up to r 23 6 providing high thermal efficiency. Some products have reinforced facing to make them sturdier. R matte plus 3 thermasheath 3 is rigid foam plastic thermal insulation board composed of environmentally sound closed cell polyisocyanurate foam bonded to a durable white matte non glare aluminum facer and a reflective reinforced aluminum facer.

Polyiso insulation is the best choice as a cost effective energy efficient and environmentally responsible insulation product. 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. Cost polyiso is the most expensive of the foam board insulation products however it s the highest r value. Polyiso comes in several thicknesses and is used over house sheathing underneath siding or in attic spaces where its reflective properties are.

It provides an r value of 6 per inch of thickness and often comes foil faced to help reflect radiant heat. 1 2014 industry issue update polyiso s r value provided an overview of the theory of foam aging. 2 stated thermal resistance values are based upon conditioning requirements and test methodology found in astm c1289 and astm c518 for foil faced polyisocyanurate insulation. Polyisocyanurate polyiso is a closed cell rigid foam insulation board made with recycled content that is widely used in commercial roofing.