R38 Rigid Roof Insulation Thickness

In q4 2013 jm will modify its packaging to reflect lttr values by both test methods.

R38 rigid roof insulation thickness.

As an example a 1 board label will include information from lttr s770 03. An r 38 fiberglass batt should be approximately 12 inches thick while the thickness of cellulose insulation of a finished fitted product will larger. There s various options for strengthening your 24 oc roof framing for the span. The thickness of your r 38 insulation will depend on the material you have the brand and how it s installed.

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. Owens corning insulation products help improve thermal performance and control moisture in commercial institutional and. Foamular extruded polystyrene xps rigid foam insulation offers foamular extruded polystyrene xps rigid foam insulation offers a comprehensive line of products choose the strength you need from 15 to 60 psi and exceptional moisture resistance. Jm sheathing r values will not change.

R 13 johns manville fiberglass insulation soundproofing insulation fiberglass insulation 2 inch fiberglass 12 fiberglass roofing. 2 sister deeper rafters based on span. Excellent lttr value compared to any other fm class 1 rated products of equivalent thickness. The information on this page is based on data considered to be true and accurate based on periodic internal.

1 when joints penetrations detailed appropriately. Benefits of energyguard polyiso roof insulation include. Jm s wall sheathing line ap foil and ci max are not governed by lttr test methods and have different r value measurement standards. 1 add rafters at 12 oc.

See also material data sheet msds 1511 or msds 1911. Products provide superior insulating properties. Product thickness in 10 25 in 2 10 25 2 12 in 8 eco options category. Get free shipping on qualified r38 fiberglass insulation or buy online pick up in store today in the building materials department.

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.