Polyiso 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.

Polyiso roof insulation r value per inch.

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. Polyiso offers a r 6 5 and the highest r value per inch when compared to other insulation. High density polyisocyanurate foam core. Not all industry stakeholders are in agreement with the r 6 in.

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. Membrane roof systems 2011 and the nrca roofing manual. Conditioned per atsm c1289 test method astm c5181 2. Benefits of energyguard polyiso roof insulation include.

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. In 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.

Lttr value published by polyisocyanurate insulation manufacturers for 1 and 1 5 inch thick samples. Closed cell polyisocyanurate foam technology provides additional insulation value r value of 2 5 with lightweight and low water absorption characteristics. Polyiso still remains the highest r value per inch of any available insulation. As a reasonable estimate of the actual thermal performance of polyisocyanurate insulation over the lifespan of a roof assembly.

Firestone iso 95 gl insulation the highest thermal ratings. Since 1987 the national roofing contractor s association nrca has recommended designers use r 5 6 in. Thickness inches r value in i p imperial rsi r value in metric 0 5. 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.

Dated its r value recommendations for polyisocyanurate insulation used in roof systems.