The r value test method and the long term thermal resistance lttr methodol ogy.
Polyisocyanurate insulation r value.
Polyiso insulation thickness r value chart.
Excellent lttr value compared to any other fm class 1 rated products of equivalent thickness.
Understanding r value thursday december 13 2018 what does r value mean.
1 2014 industry issue update polyiso s r value provided an overview of the theory of foam aging.
Polyiso has a high r value per inch compared to other insulation products.
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.
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.
As foam ages over time air and blowing agents diffuse in and out of the foam structure resulting in reduced r value.
As part of that standard the products must meet r value requirements presented as long term thermal resistance lttr.
Benefits of energyguard polyiso roof insulation include.
And nrca s r value recommendations associated with the use of polyisocyanurate insulation used in roof systems.
Polyiso is used in roof wall ceiling and specialty applications within commercial and residential buildings of all types.