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.
Firestone polyiso roof insulation r value.
Firestone has been committed to offering a complete line of high performing roofing solutions as individual as your building.
Polyiso has a high r value per inch compared to other insulation products.
Excellent lttr value compared to any other fm class 1 rated products of equivalent thickness.
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.
This industry issue update explains why the nrca recommends using a significantly lower r value for polyiso than pima does.
Polyiso insulation thickness r value chart.
Firestone iso 95 gl polyiso insulation has a higher r value than other insulation products while also outperforming competitive polyiso at low temperature.
Flat and tapered iso 95 gl insulation provides outstanding thermal performance on commercial roofing applications while providing positive rooftop drainage to help eliminate ponding water when tapered iso 95 gl insulation is used.
This commitment has resulted in the development of firestone insulation boards and firestone cover boards.
The r value of your insulation can optimize your energy savings in any zone because it s highly energy efficient with the highest r value ratings per inch the use of iso 95 gl insulation in a firestone roofing system provides a cost effective solution for today s oof design r challenges and is preferred for any and every roofing system.
The lttr test method has been updated to provide a more accurate prediction of the in service r value of polyiso roof insulation.
Benefits of energyguard polyiso roof insulation include.
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.
Understanding r value thursday december 13 2018 what does r value mean.
New polyisocyanurate r values is a 2 page 2016 industry issue update from the national roofing contractors association nrca.
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.
Roofing design professionals should now use 5 7 r inch as the design r value for permeable faced polyiso roofing products.
Recommended reading for anyone specifying polyiso insulation.
This is a decrease from the current design value of 6 0 r inch.
