Polyiso roof insulation is the most widely used product for low slope commercial roofing and provides a high r value that helps meet today s energy code requirements without the added thickness or weight of other products.
R value for polyiso roof insulation.
New polyisocyanurate r values is a 2 page 2016 industry issue update from the national roofing contractors association nrca.
As an example a 1 board label will include information from lttr s770 03.
Tapered polyiso minimizes the negative effects of ponding water and extends the service life of a roof.
This industry issue update explains why the nrca recommends using a significantly lower r value for polyiso than pima does.
Polyisocyanurate polyiso is a closed cell rigid foam insulation board made with recycled content that is widely used in commercial roofing.
Benefits of energyguard polyiso roof insulation include.
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.
Excellent lttr value compared to any other fm class 1 rated products of equivalent thickness.
Understanding r value thursday december 13 2018 what does r value mean.
Carlisle s tapered insulation helps promote rooftop drainage while providing excellent insulating value.
What is polyiso insulation.
Polyiso insulation thickness r value chart.
A higher r value means that the insulation will do a better job of holding in conditioned air whether that s heat in the winter or cool air in the summer.
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.
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.
Jm sheathing r values will not change.
Recommended reading for anyone specifying polyiso insulation.
When it comes to insulation performance the difference is in the details.
Polyiso insulation is the best choice as a cost effective energy efficient and environmentally responsible insulation product.
Nrca also is aware of two additional test programs conducted by others that have shown results similar to nrca s results.
Polyiso has a high r value per inch compared to other insulation products.
More projects select polyiso roof insulation for both new and roof replacement systems than any other insulation product.
Jm s wall sheathing line ap foil and ci max are not governed by lttr test methods and have different r value measurement standards.