R32 Roof Insulation

As a benchmark one inch of solid wood has an r value of 1.

R32 roof insulation. In comparison an inch of blown fiberglass insulation has an r value of 3 1 3 4 and an inch of blown cellulose in an attic has an r value of 3 2 3 7. So you need to know an insulation product s thickness as well as its r value in order to compare it to another product. Rigid mineral wool insulation sheathing board that is non combustible water repellent fire resistant and sound absorbent. Easily cut does not rot nor promote fungi or mildew.

Find your zone on the map and then use the chart to determine the level of insulation you need to properly insulate your attic walls floors and crawlspaces. R32 28 square foot 1 r38 17 1 1 r38 50 1 square foot 1 r38 23 1 r40 21 6 1. R value is a measure of insulation s ability to resist heat traveling through it. Along with knowing the r value of a particular insulation it is also important to calculate the r value of a total system.

The table below shows what levels of insulation are cost effective for different climates and locations in the home. Eight inches of poor quality insulation may have a higher and better r value than one inch of top quality insulation. Covers up to 29 4 sq ft. The same insulation will hold more heat the thicker it is installed.

Made from natural and recycled materials. Achieving greater r values in attics the higher the r value the better the thermal performance of the insulation. The higher the r value the better the thermal performance of the insulation. Insulation level are specified by r value.

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.