Polyisocyanurate Roof Insulation R Value Per Inch

Not all industry stakeholders are in agreement with the r 6 in.

Polyisocyanurate roof insulation r value per inch.

Excellent lttr value compared to any other fm class 1 rated products of equivalent thickness. Lttr value published by polyisocyanurate insulation manufacturers for 1 and 1 5 inch thick samples. Let s use the r value of iko s polyiso insulation enerfoil tm as an example. Jm revised lttr values.

R5 radiant acoustic insulation kit stc 19 5 piece price. 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.

Rmax thermasheath 3 2 in. Membrane roof systems 2011 and 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. Jm suggests that design professionals use 5 7 r inch as a design specification for its foam products.

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 still remains the highest r value per inch of any available insulation. Benefits of energyguard polyiso roof insulation include. 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.

Rmax thermasheath 3 1 in. R 6 polyisocyanurate rigid foam insulation board. R 13 1 polyisocyanurate rigid foam insulation board. In the nrca roofing manual.

R value per inch comparison polyiso offers a r 6 5 and the highest r value per inch when compared to other insulation. Polyiso has a high r value per inch when compared to other insulation products see chart below. This allows polyiso products to deliver more energy savings potential for buildings than other materials of the same thickness. Polyiso has a high r value per inch compared to other insulation products.