Polyiso Roof Insulation R Value Per Inch

As a reasonable estimate of the actual thermal performance of polyisocyanurate insulation over the lifespan of a roof assembly.

Polyiso roof insulation r value per inch.

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. Closed cell polyisocyanurate foam technology provides additional insulation value r value of 2 5 with lightweight and low water absorption characteristics. High density polyisocyanurate foam core. Conditioned per atsm c1289 test method astm c5181 2.

Thickness inches r value in i p imperial rsi r value in metric 0 5. 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. Carlisle s tapered insulation helps promote rooftop drainage while providing excellent insulating value. 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. In the nrca roofing manual. Tapered polyiso minimizes the negative effects of ponding water and extends the service life of a roof. Polyiso still remains the highest r value per inch of any available insulation.

Polyiso has a high r value per inch compared to other insulation products. Jm revised lttr values. Lttr value published by polyisocyanurate insulation manufacturers for 1 and 1 5 inch thick samples. Firestone iso 95 gl insulation the highest thermal ratings.

R value chart for enerfoil tm rigid foam faced insulation. Membrane roof systems 2011 and the nrca roofing manual. Polyiso offers a r 6 5 and the highest r value per inch when compared to other insulation. Excellent lttr value compared to any other fm class 1 rated products of equivalent thickness.

Dated its r value recommendations for polyisocyanurate insulation used in roof systems. Membrane roof systems 2015 nrca had recommended designers use in service r values of 5 0 per inch thickness in predominant. Benefits of energyguard polyiso roof insulation include.