Polyiso Rigid Roof Insulation R Value

Polyiso has a high r value per inch compared to other insulation products.

Polyiso rigid roof insulation r value.

Firestone isogard polyiso insulation goes even further and was the first product on the market to meet both astm c1289 required and recommended thermal performance values. For the united states market the applicable standard is astm c1289 standard specification for faced rigid cellular polyisocyanurate thermal insulation board. 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. Benefits of energyguard polyiso roof insulation include.

Firestone iso 95 gl polyiso insulation has a higher r value than other insulation products while also outperforming competitive polyiso at low temperature. Excellent lttr value compared to any other fm class 1 rated products of equivalent thickness. Tapered polyiso minimizes the negative effects of ponding water and extends the service life of a roof. All polyiso products follow astm c1289 standard specification for faced rigid polyisocyanurate thermal insulation board.

Nrca also is aware of two additional test programs conducted by others that have shown results similar to nrca s results. Let s use the r value of iko s polyiso insulation enerfoil tm as an example. The requirements for measuring and reporting thermal resistance as well as minimum r values for polyiso products are described in two relevant product standards. 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 insulation is the best choice as a cost effective energy efficient and environmentally responsible insulation product. When it comes to insulation performance the difference is in the details. Polyisocyanurate polyiso is a closed cell rigid foam insulation board made with recycled content that is widely used in commercial roofing. What is polyiso insulation.

All products in the acfoam polyiso roof insulation family are closed cell rigid foam insulation board flat or tapered. Carlisle s tapered insulation helps promote rooftop drainage while providing excellent insulating value. R value chart for enerfoil tm rigid foam faced insulation conditioned per atsm c1289 test method astm c518 1 2. Roofing product line revised lttr values effective january 1 2014.

As part of that standard the products must meet r value requirements.