Polyiso Roof Insulation R Value Per Inch

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.

Polyiso roof insulation r value per inch.

R value chart for enerfoil tm rigid foam faced insulation conditioned per atsm c1289 test method astm c518 1 2. Jm revised lttr values. Building science corporation bsc and others have been examining this difference. Polyiso has a high r value per inch compared to other insulation products.

Benefits of energyguard polyiso roof insulation include. Membrane roof systems 2011 and the nrca roofing manual. In the nrca roofing manual. However labeled r value differs from in service r value for many insulations.

Let s use the r value of iko s polyiso insulation enerfoil tm as an example. 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. 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. Polyiso still remains the highest r value per inch of any available insulation. It has one of the highest r values per inch of thickness among common insulations.