How Thick Is R30 Roof Insulation

So you need to know an insulation product s thickness as well as its r value in order to compare it to another product.

How thick is r30 roof insulation.

R30 c is designed to eliminate r value loss when compressing standard r 30 in 2x10 construction. See the department of energy s doe ranges for recommended levels of insulation below. Wall insulation whenever exterior siding is removed on an. Owens corning ecotouch insulation is soft to the owens corning ecotouch insulation is soft to the touch easy to cut and install.

Ecotouch insulation is the reinvention of fiberglass insulation from owens corning the industry leader that invented fiberglass insulation. The r30 kraft faced batts insulation has pre cut widths to fit between the studs and joists in your home. Open cell polyurethane spray foam 3 5 inches thick 12 6. 8 23 inches thick 30 50.

R30 c is 8 in. 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. Eight inches of poor quality insulation may have a higher and better r value than one inch of top quality insulation. A recent mckinsey co.

R30 to r49 r25 to r30 r13 n a 2 r30 to r60 r25 to r38 r13 to r19. As a foil faced polyisocyanurate foam insulation enerfoil tm s r value actually more than doubles. R30 c ensures proper ventilation through the ceiling rafters and is intended to be friction fit between rafters. It delivers comfort helping homes stay cooler in the summer and warmer in the winter to reduce energy costs.

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. Rigid foam insulation provides the same r factor with approximately one half the thickness. 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. Thick and provides the 1 inch of air space between the insulation and roof deck.

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. 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.