Polyisocyanurate Insulation R Value Per Inch

Using an in service r value of 5 6 per inch of foam thickness.

Polyisocyanurate insulation r value per inch. Polyiso offers a r 6 5 and the highest r value per inch when compared to other insulation. 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. 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.

As a benchmark one inch of solid wood has an r value of 1. Insulation is the product found to provide the greatest investment return and offer the most carbon abatement. Keep in mind that polyiso s r value increases with thickness. Polyiso is typically used with a foil facing and it has an r value of 7 0 to 8 0 per inch of thickness.

And nrca s r value recommendations associated with the use of polyisocyanurate insulation used in roof systems. This in service r value was intended to account for polyisocyanurate insulation s r value losses over time and provides a more realistic design r value for polyisocyanurate insulation during a roof sys tem s entire design life. Based on consensus standards in both the united states and canada long term thermal resistance lttr is a scientifically supported method to calculate the 15 year time weighted average r value of roof insulation. The reflective foil facing makes it an excellent insulation board when radiant heat is involved.

The r value test method and the long term thermal resistance lttr methodol ogy. Polyiso which forbes considers a green insulation offers the highest r value in its class with a 20 70 greater r value per inch than any other rigid foam plastic insulation. H shield cg hunter panels the big news the r value of insulation is r value chart caflei polyiso manufacturers turn blind eye to cellulose insulation vs foamrigid insulation r value per inch chart hoskinr value of polyisocyanurate insulation chart boskinrigid insulation r value chart koskintsp 3 page rmaxpir polyisocyanurate boards insulation thermalinsulation r values. For example a two inch polyiso product has more than twice the insulating value than a one inch product.