Polyiso has a high r value per inch compared to other insulation products.
Polyiso rigid roof insulation r value.
The requirements for measuring and reporting thermal resistance as well as minimum r values for polyiso products are described in two relevant product standards.
Excellent lttr value compared to any other fm class 1 rated products of equivalent thickness.
All products in the acfoam polyiso roof insulation family are closed cell rigid foam insulation board flat or tapered.
Astm c1289 standard change.
Carlisle s tapered insulation helps promote rooftop drainage while providing excellent insulating 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.
Roofing product line revised lttr values effective january 1 2014.
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.
All polyiso products follow astm c1289 standard specification for faced rigid polyisocyanurate thermal insulation board.
R value chart for enerfoil tm rigid foam faced insulation conditioned per atsm c1289 test method astm c518 1 2.
For the united states market the applicable standard is astm c1289 standard specification for faced rigid cellular polyisocyanurate thermal insulation board.
When it comes to insulation performance the difference is in the details.
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.
Nrca also is aware of two additional test programs conducted by others that have shown results similar to nrca s results.
What is polyiso insulation.
As part of that standard the products must meet r value requirements.
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.
With premium polyiso manufacturing atlas is able to produce the highest effective r values with minimal material thickness.
Polyisocyanurate polyiso is a closed cell rigid foam insulation board made with recycled content that is widely used in commercial roofing.
Tapered polyiso minimizes the negative effects of ponding water and extends the service life of a roof.
Benefits of energyguard polyiso roof insulation include.