Polyiso Rigid Insulation R Value

For the united states market the applicable standard is astm c1289 standard specification for faced rigid cellular polyisocyanurate thermal insulation board.

Polyiso rigid insulation r value.

As part of that standard the products must meet r value requirements presented as long term thermal resistance lttr. Rigid polyisocyanurate thermal insulation board. R value chart caflei closed cell and open insulation r values in pir roof insulation embly 5 interior insulated cmu wall gm 0702 to insulating sheathing. Thickness inches r value in i p imperial rsi r value in metric 0 5.

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. Polyiso has a high r value per inch compared to other insulation products. Value testing of polyisocyanurate insulation and found r values lower than the current lttr values. Written by kupis on may 7 2020 in chart.

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. R value chart for enerfoil tm rigid foam faced insulation. Rigid insulation r value per inch chart hoskin. Let s use the r value of iko s polyiso insulation enerfoil tm as an example.

This material offers the highest r values about r 6 to 6 5. Choose this option for areas that need a good amount of strength and water resistance. Polyisocyanurate polyiso is a closed cell rigid foam board insulation that is bonded to facers on both sides which are composed of various organic and inorganic materials. It provides about r 5 per inch.

As foam ages over time air and blowing agents diffuse in and out of the foam structure resulting in reduced r value. Updated recommendations although the lttr method for determining and reporting the. 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. Some products have reinforced facing to make them sturdier.

Polyiso is used in roof wall ceiling and specialty applications within commercial and residential buildings of all types. Polyisocyanurate polyiso is a closed cell rigid foam insulation board made with recycled content that is widely used in commercial roofing. It provides r values that range from 3 6 to 4 2 per inch. Polyiso rigid insulation r value chart.

The requirements for measuring and reporting thermal resistance as well as minimum r values for polyiso products are described in two relevant product standards. Benefits of energyguard polyiso roof insulation include. What is polyiso insulation.