R38 Roof Insulation Thickness

Eight inches of poor quality insulation may have a higher and better r value than one inch of top quality insulation.

R38 roof insulation thickness.

Material type r value cost per square foot cost per square foot per r value fiberglass batt 3 5 12 inches thick 13 0 20 to 0 40 0 02 30 0 60 to 1 00 0 03. Sized for proper ventilation r 38c ecotouch thermal batt insulation is designed to eliminate r value loss caused by compressing standard r 38 products in 2x12 cathedral ceiling construction. Drill holes in the sheathing and blow insulation into the empty wall cavity before installing the new siding and. Owens corning insulation products help improve thermal performance and control moisture in commercial institutional and.

R 13 johns manville fiberglass insulation soundproofing insulation fiberglass insulation 2 inch fiberglass 12 fiberglass roofing. The thickness of your r 38 insulation will depend on the material you have the brand and how it s installed. The fiberglass comes in rolls also known as batts which vary in size. Wall insulation whenever exterior siding is removed on an.

R38 is the bare minimum in dallas per code iecc 2015 that has been recently adopted in texas. Improved insulation is a good step toward improving building efficiency particularly since the atlanta based american society of heating refrigerating and air conditioning engineers ashrae increased minimum roof insulation levels in 2007 in its standard 90 1 the first increase in 18 years and if that isn t enough to spur someone into action. Insulation insulation material when properly used can make your home more comfortable and energy efficient and can significantly reduce heating and cooling bills throughout the year. Get free shipping on qualified r38 fiberglass insulation or buy online pick up in store today in the building materials department.

An r 38 fiberglass batt should be approximately 12 inches thick while the thickness of cellulose insulation of a finished fitted product will larger. To achieve r 38 you can use two layers of. An insulation value of r 38 is at the high end and requires a minimum thickness of 12 inches. As a foil faced polyisocyanurate foam insulation enerfoil tm s r value actually more than doubles.

Of energy says up to r60 is cost effective. So you need to know an insulation product s thickness as well as its r value in order to compare it to another product. 10 thick r 38c ecotouch thermal batt insulation prevents moisture damage and help assure long roof life by providing 1 of ventilation air space between the insulation and roof deck. 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.

R value does not depend on a single layer of insulation.