R38 Rigid Roof Insulation Thickness

Excellent lttr value compared to any other fm class 1 rated products of equivalent thickness.

R38 rigid roof insulation thickness.

2 stated thermal resistance values are based upon conditioning requirements and test methodology found in astm c1289 and astm c518 for foil faced polyisocyanurate insulation. An r 38 fiberglass batt should be approximately 12 inches thick while the thickness of cellulose insulation of a finished fitted product will larger. The thickness of your r 38 insulation will depend on the material you have the brand and how it s installed. Get free shipping on qualified r38 fiberglass insulation or buy online pick up in store today in the building materials department.

The only way to stop thermal bridging is to take the roofing off add a layer of rigid insulation plus strapping or plywood and renail new roofing. Products provide superior insulating properties. 2 sister deeper rafters based on span. 1 add rafters at 12 oc.

Jm s wall sheathing line ap foil and ci max are not governed by lttr test methods and have different r value measurement standards. In q4 2013 jm will modify its packaging to reflect lttr values by both test methods. Jm sheathing r values will not change. 1 when joints penetrations detailed appropriately.

The information on this page is based on data considered to be true and accurate based on periodic internal. The fiberglass comes in rolls also known as batts which vary in size. There s various options for strengthening your 24 oc roof framing for the span. Benefits of energyguard polyiso roof insulation include.

See also material data sheet msds 1511 or msds 1911. 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. R 13 johns manville fiberglass insulation soundproofing insulation fiberglass insulation 2 inch fiberglass 12 fiberglass roofing. As an example a 1 board label will include information from lttr s770 03.

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.