Polyisocyanurate Insulation R Value Chart
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This chart is a brief synopsis of approvals utilizing firestone resista insulation board.
Polyisocyanurate insulation r value chart. The common denominator among varieties of insulation is the r value. In comparison an inch of blown fiberglass insulation has an r value of 3 1 3 4 and. During late 2014 nrca conducted additional limited r value testing of polyisocyanurate insulation and found r values lower than the current lttr values. Since 1978 rmax has been an innovator in building insulation solutions.
Tapered polyiso minimizes the negative effects of ponding water and extends the service life of a roof. 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. 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.
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. Please refer to the technical. Benefits of energyguard polyiso roof insulation include. Rigid polyisocyanurate thermal insulation board.
Excellent lttr value compared to any other fm class 1 rated products of equivalent thickness. 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. Let s use the r value of iko s polyiso insulation enerfoil tm as an example.
Polyurethane spray closed cell foam insulation. Polyisocyanurate polyiso is a closed cell rigid foam insulation board made with recycled content that is. 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. As part of that standard the products must meet r value requirements presented as long term thermal resistance lttr.
What is polyiso insulation. Carlisle s tapered insulation helps promote rooftop drainage while providing excellent insulating value. 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.
The r value of your insulation can optimize your energy savings in any zone. Thanks to thanks to andrew cole for correcting our data on this product.
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