Polyiso Rigid Roof Insulation R Value

For the united states market the applicable standard is astm c1289 standard specification for faced rigid cellular polyisocyanurate thermal insulation board.
Polyiso rigid roof insulation r value. R value chart for enerfoil tm rigid foam faced insulation conditioned per atsm c1289 test method astm c518 1 2. Polyisocyanurate polyiso is a closed cell rigid foam insulation board made with recycled content that is widely used in commercial roofing. Polyiso has a high r value per inch compared to other insulation products. Firestone iso 95 gl polyiso insulation has a higher r value than other insulation products while also outperforming competitive polyiso at low temperature.
Roofing product line revised lttr values effective january 1 2014. Carlisle s tapered insulation helps promote rooftop drainage while providing excellent insulating value. What is polyiso insulation. 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.
Excellent lttr value compared to any other fm class 1 rated products of equivalent thickness. Polyiso insulation is the best choice as a cost effective energy efficient and environmentally responsible insulation product. Benefits of energyguard polyiso roof insulation include. During 2005 nrca and the canadian roofing contractors association participated in a limited research project where the r values of stored uninstalled polyisocyanurate insulation were.
As part of that standard the products must meet r value requirements. Tapered polyiso minimizes the negative effects of ponding water and extends the service life of a roof. Astm c1289 standard change. With premium polyiso manufacturing atlas is able to produce the highest effective r values with minimal material thickness.
Let s use the r value of iko s polyiso insulation enerfoil tm as an example. All products in the acfoam polyiso roof insulation family are closed cell rigid foam insulation board flat or tapered. All polyiso products follow astm c1289 standard specification for faced rigid polyisocyanurate thermal insulation board. When it comes to insulation performance the difference is in the details.
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.