Polyiso Rigid Insulation Thickness

It provides an r value of 6 per inch of thickness and often comes foil faced to help reflect radiant heat.

Polyiso rigid insulation thickness. This product provides two layers of insulation installed in one application which reduces labor and material costs. R5 radiant acoustic insulation kit stc 19 5 piece. Rmax thermasheath 3 1 in. This is an even more dense and more expensive foam board insulation.

As a foil faced polyisocyanurate foam insulation enerfoil tm s r value actually more than doubles when it is twice as thick as you can see from the chart above. 2 in x 4 ft x 8 ft. Benefits of energyguard polyiso roof insulation include. Polyiso comes in several thicknesses and is used over house sheathing underneath siding or in attic spaces where its reflective properties are very effective.

Rmax r matte plus 3 1 2 in. Excellent lttr value compared to any other fm class 1 rated products of equivalent thickness. Old lttr test method. 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.

Other materials may only have a fifty percent increase in r value when their thickness is. R 3 2 polyisocyanurate rigid foam insulation board. They are not intended to be used as sound deadening or sound absorbing materials. Jm suggests that the design professional specify polyiso insulation by its thickness and its full astm designation rather than.

Shop johns manville r 13 common. Firestone isogard hd composite cover board is ideal for both new construction and reroof applications with available thicknesses from 1 5 to 4 two board sizes and three coated glass facers that provide mold resistance. Polyiso has a high r value per inch compared to other insulation products. Eight inches of poor quality insulation may have a higher and better r value than one inch of top quality insulation.

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 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. R 6 polyisocyanurate rigid foam insulation board. So you need to know an insulation product s thickness as well as its r value in order to compare it to another product.

Likewise for jobs that will be permitted in 2014 the design professional should specify insulation thickness based on the 5 7 r inch design guideline associated with the new lttr test method.