Polyisocyanurate Roof Insulation R Value Per Inch

Membrane roof systems 2015 nrca had recommended designers use in service r values of 5 0 per inch thickness in predominant.

Polyisocyanurate roof insulation r value per inch.

Benefits of energyguard polyiso roof insulation include. Jm suggests that design professionals use 5 7 r inch as a design specification for its foam products. Jm is proud to be a pima member and have its product third party certified under the pima quality mark program. Membrane roof systems 2011 and the nrca roofing manual.

Not all industry stakeholders are in agreement with the r 6 in. Rmax thermasheath 3 1 in. R5 radiant acoustic insulation kit stc 19 5 piece price. Polyiso has a high r value per inch compared to other insulation products.

R value per inch comparison polyiso offers a r 6 5 and the highest r value per inch when compared to other insulation. 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. Because it s highly energy efficient with the highest r value ratings per inch the use of iso 95 gl insulation in a firestone roofing system provides a cost effective solution for today s oof design r challenges and is preferred for any and every roofing system. This allows polyiso products to deliver more energy savings potential for buildings than other materials of the same thickness.

Excellent lttr value compared to any other fm class 1 rated products of equivalent thickness. Firestone iso 95 gl insulation the highest thermal ratings. R 13 1 polyisocyanurate rigid foam insulation board. Lttr value published by polyisocyanurate insulation manufacturers for 1 and 1 5 inch thick samples.

Rmax thermasheath 3 2 in. Polyiso has a high r value per inch when compared to other insulation products see chart below. R 6 polyisocyanurate rigid foam insulation board. Let s use the r value of iko s polyiso insulation enerfoil tm as an example.

Polyiso still remains the highest r value per inch of any available insulation. Jm revised lttr values. 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. As a reasonable estimate of the actual thermal performance of polyisocyanurate insulation over the lifespan of a roof assembly.