R 30 Rigid Roof Insulation Thickness

Firestone isogard polyiso insulation goes even further and was the first product on the market to meet both astm c1289 required and recommended thermal performance values.

R 30 rigid roof insulation thickness.

Professional should specify insulation thickness based r value on the 6 0 r inch design guideline associated with the. Rigid polyisocyanurate thermal insulation board. When it comes to insulation performance the difference is in the details. With premium polyiso manufacturing atlas is able to produce the highest effective r values with minimal material thickness.

As a benchmark one inch of solid wood has an r value of 1. Rigid foam insulation typically gives the best insulation in the smallest thickness measuring up to r 6 5 per inch. For a 1 in thick 4 8 panel comes unfaced or with a number of different plastic facings. All products in the acfoam polyiso roof insulation family are closed cell rigid foam insulation board flat or tapered.

In comparison an inch of blown fiberglass insulation has an r value of 3 1 3 4 and an inch of blown cellulose in an attic has an r value of 3 2 3 7. Falls in the middle of the three types of rigid foam insulation in both cost and r value used most in walls or below grade applications recyclable and at about r 5 per inch costs around 42 per sq. Firestone iso 95 gl polyiso insulation has a higher r value than other insulation products while also outperforming competitive polyiso at low temperature. So you need to know an insulation product s thickness as well as its r value in order to compare it to another product.

Owens corning insulation products help improve thermal performance and control moisture in commercial institutional and. 1 844 446 7858 my account. R value is a measurement of thermal resistance and measures the ability of heat to transfer from one side of an object to another. Eight inches of poor quality insulation may have a higher and better r value than one inch of top quality insulation.

Foamular xps roof insulation for commercial buildings page 5 foamular xps roof insulation for commercial buildings foamular xps insulation is a rigid foam insulation which meets the needs of today s design professionals for a truly sustainable insulation product. Our r value guide to rigid insulation includes the doe s recommended insulation by zone chart r value calculator and base building material r values chart. As part of that standard the products must meet r value requirements. 6 r 30 2 layers 2 5 2 layers 2 6 7 8 r 35 2 layers 2 9 2 layers 3 1.