Polyiso Rigid Insulation R Value

As foam ages over time air and blowing agents diffuse in and out of the foam structure resulting in reduced r value.

Polyiso rigid insulation r value.

This material offers the highest r values about r 6 to 6 5. R value chart for enerfoil tm rigid foam faced insulation. For the united states market the applicable standard is astm c1289 standard specification for faced rigid cellular polyisocyanurate thermal insulation board. 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.

Thickness inches r value in i p imperial rsi r value in metric 0 5. Rigid polyisocyanurate thermal insulation board. Choose this option for areas that need a good amount of strength and water resistance. The requirements for measuring and reporting thermal resistance as well as minimum r values for polyiso products are described in two relevant product standards.

Let s use the r value of iko s polyiso insulation enerfoil tm as an example. 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. Conditioned per atsm c1289 test method astm c518 1 2. It provides r values that range from 3 6 to 4 2 per inch.

Polyiso is used in roof wall ceiling and specialty applications within commercial and residential buildings of all types. 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. Polyiso rigid insulation r value chart. Rigid insulation r value per inch chart hoskin.

What is polyiso insulation. Some products have reinforced facing to make them sturdier. Updated recommendations although the lttr method for determining and reporting the. Polyisocyanurate polyiso is a closed cell rigid foam insulation board made with recycled content that is widely used in commercial roofing.

As part of that standard the products must meet r value requirements presented as long term thermal resistance lttr. 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. Benefits of energyguard polyiso roof insulation include. Value testing of polyisocyanurate insulation and found r values lower than the current lttr values.

It provides about r 5 per inch. Polyiso insulation is the best choice as a cost effective energy efficient and environmentally responsible insulation product. 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.