Polyisocyanurate Insulation R Value Chart

The r value of your insulation can optimize your energy savings in any zone.

Polyisocyanurate insulation r value chart.

Please refer to the technical. The common denominator among varieties of insulation is the r value. As foam ages over time air and blowing agents diffuse in and out of the foam structure resulting in reduced r value. Excellent lttr value compared to any other fm class 1 rated products of equivalent thickness.

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 late 2014 nrca conducted additional limited r value testing of polyisocyanurate insulation and found r values lower than the current lttr values. In comparison an inch of blown fiberglass insulation has an r value of 3 1 3 4 and. R value is a measurement of thermal resistance and measures the ability of heat to transfer from one side of an object to another.

Insulation or other building material 9. Polyiso has a high r value per inch compared to other insulation products. Most insulation manufacturers will first list their insulation s r value for a one inch sample then they ll give you a chart demonstrating the other r values you can achieve if you install a thicker version of their product. As a benchmark one inch of solid wood has an r value of 1.

Aging effects comments. The results also are somewhat lower than the results at 25 f 40 f 75 f and 110 f mean test tem peratures from nrca s 2009 testing. Since 1978 rmax has been an innovator in building insulation solutions. What is polyiso insulation.

Benefits of energyguard polyiso roof insulation include. Let s use the r value of iko s polyiso insulation enerfoil tm as an example. Polyisocyanurate polyurethane foam insulation r values. Thanks to thanks to andrew cole for correcting our data on this product.

Rigid polyisocyanurate thermal insulation board. Our comprehensive line of high quality polyiso based products continues to deliver maximum r values minimum environmental impact and efficiency in installation cost and design. Polyisocyanurate polyiso is a closed cell rigid foam insulation board made with recycled content that is. Polyurethane spray closed cell foam insulation.

Tapered polyiso minimizes the negative effects of ponding water and extends the service life of a roof. 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.