Polyiso 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.

Polyiso roof insulation thickness. When it comes to insulation performance the difference is in the details. Nrca recommends roof system designers specify a maximum 4 by 4 foot board size for poly isocyanurate adhered to a substrate. Jm s wall sheathing line ap foil and ci max are not governed by lttr test methods and have different r value measurement standards. What is polyiso insulation.

A higher r value means that the insulation will do a better job of holding in conditioned air whether that s heat in the winter or cool air in the summer. Polyiso insulation is the best choice as a cost effective energy efficient and environmentally responsible insulation product. Jm sheathing r values will not change. 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 insulation thickness r value chart. Benefits of energyguard polyiso roof insulation include. Application specific guidance polyisocyanurate insulation is available in 4 by 4 and 4 by 8 foot board sizes. 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 insulation by its desired thickness and not lttr or r value to avoid possible confusion. With premium polyiso manufacturing atlas is able to produce the highest effective r values with minimal material thickness. Features and benefits achieves a ul class a combustible deck rating at a 1 thickness. All products in the acfoam polyiso roof insulation family are closed cell rigid foam insulation board flat or tapered.

Polyisocyanurate polyiso is a closed cell rigid foam insulation board made with recycled content that is widely used in commercial roofing. Excellent lttr value compared to any other fm class 1 rated products of equivalent thickness. Polyiso has a high r value per inch compared to other insulation products. As an example a 1 board label will include information from lttr s770 03.

Insulation overview securshield polyiso is a rigid roof insulation panel composed of a closed cell polyisocyanurate foam core bonded during the manufacturing process to premium performance coated glass facers cgf. It can be attached using a variety of methods and is compatible with all of carlisle s single ply systems.