Polyisocyanurate Foam Board R Value

Polyiso comes in several thicknesses and is used over house sheathing underneath siding or in attic spaces where its reflective properties are.

Polyisocyanurate foam board r value.

1 when joints penetrations detailed appropriately. This material offers the highest r values about r 6 to 6 5. 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. What is polyiso insulation.

Polyisocyanurate polyiso is a closed cell rigid foam insulation board made with recycled content that is widely used in commercial roofing. See also material data sheet msds 1511 or msds 1911. Cost polyiso is the most expensive of the foam board insulation products however it s the highest r value. Polyiso is used in roof wall ceiling and specialty applications within commercial and residential buildings of all types.

It provides about r 5 per inch. Polyiso has a high r value per inch compared to other insulation products. 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. Johns manville r panel rigid roof insulation board offers r values of up to r 23 6 providing high thermal efficiency.

Polyurethane and polyisocyanurate are both closed cell foams. 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. 1 2014 industry issue update polyiso s r value provided an overview of the theory of foam aging. 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. 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 r values that range from 3 6 to 4 2 per inch.

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. It provides an r value of 6 per inch of thickness and often comes foil faced to help reflect radiant heat. Polyiso insulation is the best choice as a cost effective energy efficient and environmentally responsible insulation product. The information on this page is based on data considered to be true and accurate based on periodic internal.