Polyiso Roof Insulation R Value Per Inch

Carlisle s tapered insulation helps promote rooftop drainage while providing excellent insulating value. Closed cell polyisocyanurate foam technology provides additional insulation value r value of 2 5 with lightweight and low water absorption characteristics. Conditioned per atsm c1289 test method astm c5181 2.

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Tapered polyiso minimizes the negative effects of ponding water and extends the service life of a roof.

Polyiso roof insulation r value per inch.

Jm revised lttr values. Not all industry stakeholders are in agreement with the r 6 in. Thickness inches r value in i p imperial rsi r value in metric 0 5. Polyiso still remains the highest r value per inch of any available insulation.

R value chart for enerfoil tm rigid foam faced insulation. Dated its r value recommendations for polyisocyanurate insulation used in roof systems. 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.

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. Membrane roof systems 2011 and the nrca roofing manual. Firestone iso 95 gl insulation the highest thermal ratings.

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. Jm is proud to be a pima member and have its product third party certified under the pima quality mark program. Benefits of energyguard polyiso roof insulation include. Jm suggests that design professionals use 5 7 r inch as a design specification for its foam products.

Since 1987 the national roofing contractor s association nrca has recommended designers use r 5 6 in. 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. As a reasonable estimate of the actual thermal performance of polyisocyanurate insulation over the lifespan of a roof assembly. Polyiso offers a r 6 5 and the highest r value per inch when compared to other insulation.

Lttr value published by polyisocyanurate insulation manufacturers for 1 and 1 5 inch thick samples. High density polyisocyanurate foam core. Excellent lttr value compared to any other fm class 1 rated products of equivalent thickness.

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