Polyisocyanurate Roof Insulation R Value Per Inch

R 6 polyisocyanurate rigid foam insulation board.

Polyisocyanurate roof insulation r value per inch.

Excellent lttr value compared to any other fm class 1 rated products of equivalent thickness. As a reasonable estimate of the actual thermal performance of polyisocyanurate insulation over the lifespan of a roof assembly. Benefits of energyguard polyiso roof insulation include. Firestone iso 95 gl insulation the highest thermal ratings.

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. This allows polyiso products to deliver more energy savings potential for buildings than other materials of the same thickness. Let s use the r value of iko s polyiso insulation enerfoil tm as an example. Jm revised lttr values.

Lttr value published by polyisocyanurate insulation manufacturers for 1 and 1 5 inch thick samples. Polyiso still remains the highest r value per inch of any available insulation. Jm is proud to be a pima member and have its product third party certified under the pima quality mark program. Rmax thermasheath 3 2 in.

Rmax thermasheath 3 1 in. Membrane roof systems 2015 nrca had recommended designers use in service r values of 5 0 per inch thickness in predominant. Dated its r value recommendations for polyisocyanurate insulation used in roof systems. R 13 1 polyisocyanurate rigid foam insulation board.

R5 radiant acoustic insulation kit stc 19 5 piece price. Jm suggests that design professionals use 5 7 r inch as a design specification for its foam products. Polyiso has a high r value per inch compared to other insulation products. In the nrca roofing manual.

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. Not all industry stakeholders are in agreement with the r 6 in. Membrane roof systems 2011 and the nrca roofing manual. 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.