Polyisocyanurate Roof Insulation Thickness

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.

Polyisocyanurate roof insulation thickness.

Membrane roof systems 2015 nrca had recommended designers use in service r values of 5 0 per inch thickness in predominant. Trymer pir polyisocyanurate is a closed cell foam insulation for industrial pipes vessels and equipment. All atlas acfoam polyiso insulation boards are qualitymark certified providing consumers an easy way to identify premium products that meet or exceed building codes for the best in roof performance. Eight inches of poor quality insulation may have a higher and better r value than one inch of top quality insulation.

Benefits of energyguard polyiso roof insulation include. Trymer pir can be used in applications that operate at temperatures ranging from 297 f to 300 f 183 c to 148 c. Jm suggests that the design professional specify polyiso insulation by its thickness and its full astm designation rather than. 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.

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. Polyiso roof insulation is the most widely used product for low slope commercial roofing and provides a high r value that helps meet today s energy code requirements without the added thickness or weight of other products. Polyisocyanurate polyiso polyiso is the industry s premier roofing insulation. Excellent lttr value compared to any other fm class 1 rated products of equivalent thickness.

Additionally trymer pir is offered in a variety of different densities and compressive strengths to ensure the product consistency is suited for the unique needs of. 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. Membrane roof systems 2011 and the nrca roofing manual. Polyiso has a high r value per inch compared to other insulation products.

This product provides two layers of insulation installed in one application which reduces labor and material costs. Acfoam polyiso roof insulation atlas acfoam products are among the most sustainable and widely used building insulation materials available today. Dated its r value recommendations for polyisocyanurate insulation used in roof systems. Other materials may only have a fifty percent increase in r value when their thickness is.

It can be attached using a variety of methods and is compatible with all of carlisle s single ply systems. Old lttr test method.