Polyisocyanurate Insulation R Value Chart

Polyurethane spray closed cell foam insulation.

Polyisocyanurate insulation r value chart.

Excellent lttr value compared to any other fm class 1 rated products of equivalent thickness. In comparison an inch of blown fiberglass insulation has an r value of 3 1 3 4 and. As a benchmark one inch of solid wood has an r value of 1. The r value of your insulation can optimize your energy savings in any zone.

Since 1978 rmax has been an innovator in building insulation solutions. 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. 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. Benefits of energyguard polyiso roof insulation include.

Thanks to thanks to andrew cole for correcting our data on this product. Tapered polyiso minimizes the negative effects of ponding water and extends the service life of a roof. Polyisocyanurate polyurethane foam insulation r values. 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.

Polyisocyanurate polyiso is a closed cell rigid foam insulation board made with recycled content that is. 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. During late 2014 nrca conducted additional limited r value testing of polyisocyanurate insulation and found r values lower than the current lttr values. Insulation or other building material 9.

Polyiso has a high r value per inch compared to other insulation products. R value is a measurement of thermal resistance and measures the ability of heat to transfer from one side of an object to another. 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. Aging effects comments. Rigid polyisocyanurate thermal insulation board. Carlisle s tapered insulation helps promote rooftop drainage while providing excellent insulating value.

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. What is polyiso insulation.