Polyisocyanurate Roof Insulation R Value Per Inch

Polyiso has a high r value per inch compared to other insulation products.

Polyisocyanurate roof insulation r value per inch.

Benefits of energyguard polyiso roof insulation include. 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. This allows polyiso products to deliver more energy savings potential for buildings than other materials of the same thickness.

Jm is proud to be a pima member and have its product third party certified under the pima quality mark program. 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. Not all industry stakeholders are in agreement with the r 6 in.

R5 radiant acoustic insulation kit stc 19 5 piece price. Since 1987 the national roofing contractor s association nrca has recommended designers use r 5 6 in. Rmax thermasheath 3 2 in. R value per inch comparison polyiso offers a r 6 5 and the highest r value per inch when compared to other insulation.

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. In the nrca roofing manual. As a reasonable estimate of the actual thermal performance of polyisocyanurate insulation over the lifespan of a roof assembly. 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. Jm revised lttr values. Dated its r value recommendations for polyisocyanurate insulation used in roof systems. Membrane roof systems 2011 and the nrca roofing manual.

R 13 1 polyisocyanurate rigid foam insulation board. Polyiso has a high r value per inch when compared to other insulation products see chart below. 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. Let s use the r value of iko s polyiso insulation enerfoil tm as an example.