How Thick Is R30 Roof Insulation

Wall insulation whenever exterior siding is removed on an.

How thick is r30 roof insulation. The r30 kraft faced batts insulation has pre cut widths to fit between the studs and joists in your home. It delivers comfort helping homes stay cooler in the summer and warmer in the winter to reduce energy costs. Insulation thickness to reach the r 30 value depends on the insulation material but fiberglass batts of r 30 insulation are 9 1 2 inches thick. Install our insulation with confidence knowing that over 70 years of innovation and experience has gone in the making of ecotouch insulation.

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. R30 c is designed to eliminate r value loss when compressing standard r 30 in 2x10 construction. So you need to know an insulation product s thickness as well as its r value in order to compare it to another product. As a foil faced polyisocyanurate foam insulation enerfoil tm s r value actually more than doubles.

Ecotouch insulation is the reinvention of fiberglass insulation from owens corning the industry leader that invented fiberglass insulation. R30 c is 8 in. Rigid foam insulation provides the same r factor with approximately one half the thickness. Open cell polyurethane spray foam 3 5 inches thick 12 6.

Eight inches of poor quality insulation may have a higher and better r value than one inch of top quality insulation. See the department of energy s doe ranges for recommended levels of insulation below. Our r value guide to rigid insulation includes the doe s recommended insulation by zone chart r value calculator and base building material r values chart. If you think you re among the 90 of us homes that are under insulated 1 performing a simple insulation inspection will help you determine your insulation needs.

Having the correct amount of attic insulation can help you maintain a comfortable temperature throughout your home and help save money on your energy bills plus prevent major issues like ice dams in the winter. Thick and provides the 1 inch of air space between the insulation and roof deck. A recent mckinsey co. R30 c ensures proper ventilation through the ceiling rafters and is intended to be friction fit between rafters.

8 23 inches thick 30 50. Typical recommendations for exterior walls are r 13 to r 23 while r 30 r 38 and r 49 are common for ceilings and attic spaces.