Polyisocyanurate Roof Insulation Thickness

So you need to know an insulation product s thickness as well as its r value in order to compare it to another product.

Polyisocyanurate roof insulation thickness.

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. In the nrca roofing manual. 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. Acfoam polyiso roof insulation atlas acfoam products are among the most sustainable and widely used building insulation materials available today.

Trymer pir polyisocyanurate is a closed cell foam insulation for industrial pipes vessels and equipment. It can be attached using a variety of methods and is compatible with all of carlisle s single ply systems. This product provides two layers of insulation installed in one application which reduces labor and material costs. Excellent lttr value compared to any other fm class 1 rated products of equivalent thickness.

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 has a high r value per inch compared to other insulation products. Membrane roof systems 2011 and the nrca roofing manual. Trymer pir can be used in applications that operate at temperatures ranging from 297 f to 300 f 183 c to 148 c.

Polyisocyanurate polyiso polyiso is the industry s premier roofing insulation. Other materials may only have a fifty percent increase in r value when their thickness is. Eight inches of poor quality insulation may have a higher and better r value than one inch of top quality insulation. Old lttr test method.

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. 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. Dated its r value recommendations for polyisocyanurate insulation used in roof systems. 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.

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. 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.