Polyisocyanurate Insulation R Value Chart

Polyurethane spray closed cell foam insulation.

Polyisocyanurate insulation r value chart.

As foam ages over time air and blowing agents diffuse in and out of the foam structure resulting in reduced r value. Tapered polyiso minimizes the negative effects of ponding water and extends the service life of a roof. During late 2014 nrca conducted additional limited r value testing of polyisocyanurate insulation and found r values lower than the current lttr values. 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.

The r value of your insulation can optimize your energy savings in any zone. The common denominator among varieties of insulation is the r value. What is polyiso insulation. Insulation or other building material 9.

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. Let s use the r value of iko s polyiso insulation enerfoil tm as an example. Polyiso has a high r value per inch compared to other insulation products.

Polyisocyanurate polyiso is a closed cell rigid foam insulation board made with recycled content that is. As part of that standard the products must meet r value requirements presented as long term thermal resistance lttr. This chart is a brief synopsis of approvals utilizing firestone resista insulation board. Thanks to thanks to andrew cole for correcting our data on this product.

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. 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. 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.

Rigid polyisocyanurate thermal insulation board. Please refer to the technical. Since 1978 rmax has been an innovator in building insulation solutions. Aging effects comments.

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.