Polyiso Roof Insulation R Value Per Inch

In the nrca roofing manual.

Polyiso roof insulation r value per inch.

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. 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. Firestone iso 95 gl insulation the highest thermal ratings.

Carlisle s tapered insulation helps promote rooftop drainage while providing excellent insulating value. Tapered polyiso minimizes the negative effects of ponding water and extends the service life of a roof. As a reasonable estimate of the actual thermal performance of polyisocyanurate insulation over the lifespan of a roof assembly. High density polyisocyanurate foam core.

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. Jm suggests that design professionals use 5 7 r inch as a design specification for its foam products. 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. Since 1987 the national roofing contractor s association nrca has recommended designers use r 5 6 in. Polyiso has a high r value per inch compared to other insulation products. Excellent lttr value compared to any other fm class 1 rated products of equivalent thickness.

Polyiso offers a r 6 5 and the highest r value per inch when compared to other insulation. Jm revised lttr values. Benefits of energyguard polyiso roof insulation include. Conditioned per atsm c1289 test method astm c5181 2.

Jm is proud to be a pima member and have its product third party certified under the pima quality mark program. Not all industry stakeholders are in agreement with the r 6 in. R value chart for enerfoil tm rigid foam faced insulation.