Polyisocyanurate Insulation R Value

Fm approved subject to the conditions of approval as a roof insulation when installed as shown in the current edition of the factory mutual research approvals guide.

Polyisocyanurate insulation r value.

Rigid polyisocyanurate thermal insulation board. 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. And nrca s r value recommendations associated with the use of polyisocyanurate insulation used in roof systems.

Benefits of energyguard polyiso roof insulation include. Polyiso insulation thickness r value chart. 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 part of that standard the products must meet r value requirements presented as long term thermal resistance lttr.

A higher r value means that the insulation will do a better job of holding in conditioned air whether that s heat in the winter or cool air in the summer. The r value test method and the long term thermal resistance lttr methodol ogy. Polyiso is used in roof wall ceiling and specialty applications within commercial and residential buildings of all types. Excellent lttr value compared to any other fm class 1 rated products of equivalent thickness.