Polyisocyanurate Roof Insulation R Value Per Inch

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Polyisocyanurate roof insulation r value per inch.

R 13 1 polyisocyanurate rigid foam insulation board. Since 1987 the national roofing contractor s association nrca has recommended designers use r 5 6 in. R 6 polyisocyanurate rigid foam insulation board. Jm revised lttr values.

Rmax thermasheath 3 1 in. Jm suggests that design professionals use 5 7 r inch as a design specification for its foam products. 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.

R5 radiant acoustic insulation kit stc 19 5 piece price. R value per inch comparison polyiso offers a r 6 5 and the highest r value per inch when compared to other insulation. 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.

Excellent lttr value compared to any other fm class 1 rated products of equivalent thickness. In the nrca roofing manual. This allows polyiso products to deliver more energy savings potential for buildings than other materials of the same thickness. Firestone iso 95 gl insulation the highest thermal ratings.

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

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 has a high r value per inch compared to other insulation products. As a reasonable estimate of the actual thermal performance of polyisocyanurate insulation over the lifespan of a roof assembly. Rmax thermasheath 3 2 in.