As an example a 1 board label will include information from lttr s770 03.
Firestone polyiso roof insulation r value.
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 has been committed to offering a complete line of high performing roofing solutions as individual as your building.
Tapered polyiso minimizes the negative effects of ponding water and extends the service life of a roof.
Carlisle s tapered insulation helps promote rooftop drainage while providing excellent insulating value.
In 2003 the polyiso industry introduced the concept of long term thermal resistance or lttr.
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.
Firestone polyiso insulation.
Jm s wall sheathing line ap foil and ci max are not governed by lttr test methods and have different r value measurement standards.
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.
Lttr is a 15 year time weighted average of the foam s r value.
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.
It represents the actual r value that the polyiso insulation will provide while in service.
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.
Polyiso insulation thickness r value chart.
Jm sheathing r values will not change.
The net result is that the r value of the insulation will decrease slightly over time.
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.
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.
In q4 2013 jm will modify its packaging to reflect lttr values by both test methods.
This commitment has resulted in the development of firestone insulation boards and firestone cover boards.
Firestone iso 95 gl polyiso insulation has a higher r value than other insulation products while also outperforming competitive polyiso at low temperature.
Benefits of energyguard polyiso roof insulation include.
