Polyisocyanurate Insulation R Value Chart

During late 2014 nrca conducted additional limited r value testing of polyisocyanurate insulation and found r values lower than the current lttr values.

Polyisocyanurate insulation r value chart.

Aging effects comments. 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. Insulation or other building material 9. Excellent lttr value compared to any other fm class 1 rated products of equivalent thickness.

Since 1978 rmax has been an innovator in building insulation solutions. Carlisle s tapered insulation helps promote rooftop drainage while providing excellent insulating value. What is polyiso insulation. Tapered polyiso minimizes the negative effects of ponding water and extends the service life of a roof.

As part of that standard the products must meet r value requirements presented as long term thermal resistance lttr. In comparison an inch of blown fiberglass insulation has an r value of 3 1 3 4 and. Polyisocyanurate polyiso is a closed cell rigid foam insulation board made with recycled content that is. Polyisocyanurate polyurethane foam insulation r values.

Rigid polyisocyanurate thermal insulation board. Polyiso has a high r value per inch compared to other insulation products. This chart is a brief synopsis of approvals utilizing firestone resista insulation board. As foam ages over time air and blowing agents diffuse in and out of the foam structure resulting in reduced r value.

Thanks to thanks to andrew cole for correcting our data on this product. R value is a measurement of thermal resistance and measures the ability of heat to transfer from one side of an object to another. As a benchmark one inch of solid wood has an r value of 1. Benefits of energyguard polyiso roof insulation include.

Polyurethane spray closed cell foam insulation. 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. Please refer to the technical. 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. 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.