Polyisocyanurate Insulation R Value Chart

Since 1978 rmax has been an innovator in building insulation solutions.

Polyisocyanurate insulation r value chart.

The common denominator among varieties of insulation is the r value. Rigid polyisocyanurate thermal insulation board. Polyisocyanurate polyiso is a closed cell rigid foam insulation board made with recycled content that is. Aging effects comments.

Excellent lttr value compared to any other fm class 1 rated products of equivalent thickness. The r value of your insulation can optimize your energy savings in any zone. During late 2014 nrca conducted additional limited r value testing of polyisocyanurate insulation and found r values lower than the current lttr values. 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.

Insulation or other building material 9. As foam ages over time air and blowing agents diffuse in and out of the foam structure resulting in reduced r value. R value is a measurement of thermal resistance and measures the ability of heat to transfer from one side of an object to another. Polyisocyanurate polyurethane foam insulation r values.

Thanks to thanks to andrew cole for correcting our data on this product. As part of that standard the products must meet r value requirements presented as long term thermal resistance lttr. Benefits of energyguard polyiso roof insulation include. Polyurethane spray closed cell foam insulation.

Please refer to the technical. Polyiso has a high r value per inch compared to other insulation products. What is polyiso insulation. As a benchmark one inch of solid wood has an r value of 1.

In comparison an inch of blown fiberglass insulation has an r value of 3 1 3 4 and. 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. 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. Let s use the r value of iko s polyiso insulation enerfoil tm as an example.

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