Thickness Of Polyiso Roof Insul

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.

Thickness of polyiso roof insul. Carlisle s tapered insulation helps promote rooftop drainage while providing excellent insulating value. 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. 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. Nrca recommends roof system designers specify a maximum 4 by 4 foot board size for poly isocyanurate adhered to a substrate.

Polyiso insulation is the best choice as a cost effective energy efficient and environmentally responsible insulation product. Application specific guidance polyisocyanurate insulation is available in 4 by 4 and 4 by 8 foot board sizes. 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. Polyiso can be installed on both commercial and residential structures on the roof or in the wall.

Jm s wall sheathing line ap foil and ci max are not governed by lttr test methods and have different r value measurement standards. Tapered polyiso minimizes the negative effects of ponding water and extends the service life of a roof. Jm sheathing r values will not change. Polyiso insulation thickness r value chart.

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. Polyiso is used in roof wall ceiling and specialty applications within commercial and residential buildings of all types. When it comes to thermal efficiency and a wide range of building applications polyiso insulation is the 1 insulating material available today.

Polyiso has a high r value per inch compared to other insulation products. Polyisocyanurate polyiso is a closed cell rigid foam board insulation that is bonded to facers on both sides which are composed of various organic and inorganic materials. Polyisocyanurate polyiso is a closed cell rigid foam insulation board made with recycled content that is widely used in commercial roofing. In q4 2013 jm will modify its packaging to reflect lttr values by both test methods.

When we say that hunter polyiso is the cornerstone of green buildings we re not just blowing smoke. Polyisocyanurate insulation by its desired thickness and not lttr or r value to avoid possible confusion.