Polyisocyanurate Board Insulation R Value

As foam ages over time air and blowing agents diffuse in and out of the.

Polyisocyanurate board insulation r value.

Polyisocyanurate insulation panels are actually one of the most thermally efficient insulation products on the market. R 10 scored squared edge insulation sheathing. Rmax thermasheath 3 1 in. 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.

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. R 5 scored square edge rigid foam board insulation sheathing. As much as five times lighter in weight than many other materials with the same r value. An insulation board made of glass fiber reinforced cellulosic felt facers bonded to a core of isocyanurate foam.

On tuff r insulation one facer is a continuous sheet of aluminum foil. Astm c1289 standard change. Foamular 250 2 in. R 6 polyisocyanurate rigid foam insulation board.

The information on this page is based on data considered to be true and accurate based on periodic internal. 1 when joints penetrations detailed appropriately. And nrca s r value recommendations associated with the use of polyisocyanurate insulation used in roof systems. All polyiso products follow astm c1289 standard specification for faced rigid polyisocyanurate thermal insulation board.

The other is a tri plex facer consisting of a three ply laminate of durable kraft. The r value test method and the long term thermal resistance lttr methodol ogy. Foamular 150 1 in. R5 radiant acoustic insulation kit stc 19 5.

As part of that standard the products must meet r value requirements presented as long term thermal resistance lttr. Polyiso has a high r value per inch compared to other insulation products. An insulation material s resistance to heat flow is rated in terms of r value a higher r value means greater insulating effectiveness i e higher resistance to heat flow. Energyguard polyiso roof insulation.

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. 1 2014 industry issue update polyiso s r value provided an overview of the theory of foam aging. 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. The r value of polyisocyanurate is the highest of all traditional roof insulation r 5 7 resulting in a thin but highly efficient roof system.