Polyisocyanurate Roof Insulation R Value Per Inch

Polyiso has a high r value per inch when compared to other insulation products see chart below.

Polyisocyanurate roof insulation r value per inch.

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. R5 radiant acoustic insulation kit stc 19 5 piece price. Benefits of energyguard polyiso roof insulation include. Since 1987 the national roofing contractor s association nrca has recommended designers use r 5 6 in.

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. Excellent lttr value compared to any other fm class 1 rated products of equivalent thickness. Polyiso has a high r value per inch compared to other insulation products. Membrane roof systems 2015 nrca had recommended designers use in service r values of 5 0 per inch thickness in predominant.

Firestone iso 95 gl insulation the highest thermal ratings. Membrane roof systems 2011 and the nrca roofing manual. Jm is proud to be a pima member and have its product third party certified under the pima quality mark program. R 13 1 polyisocyanurate rigid foam insulation board.

In the nrca roofing manual. Lttr value published by polyisocyanurate insulation manufacturers for 1 and 1 5 inch thick samples. R 6 polyisocyanurate rigid foam insulation board. As a reasonable estimate of the actual thermal performance of polyisocyanurate insulation over the lifespan of a roof assembly.

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. Let s use the r value of iko s polyiso insulation enerfoil tm as an example. Dated its r value recommendations for polyisocyanurate insulation used in roof systems. This allows polyiso products to deliver more energy savings potential for buildings than other materials of the same thickness.

Polyiso still remains the highest r value per inch of any available insulation. Rmax thermasheath 3 2 in. Jm revised lttr values. R value per inch comparison polyiso offers a r 6 5 and the highest r value per inch when compared to other insulation.