R32 Roof Insulation

R32 28 square foot 1 r38 17 1 1 r38 50 1 square foot 1 r38 23 1 r40 21 6 1.

R32 roof insulation.

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. As a benchmark one inch of solid wood has an r value of 1. A recent mckinsey co. Along with knowing the r value of a particular insulation it is also important to calculate the r value of a total system.

The same insulation will hold more heat the thicker it is installed. Shop menards for easy to install loose fill blow in insulation that will help reduce energy bills so you can save big money. So you need to know an insulation product s thickness as well as its r value in order to compare it to another product. Made from natural and recycled materials.

Easily cut does not rot nor promote fungi or mildew. 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. The table below shows what levels of insulation are cost effective for different climates and locations in the home. Covers up to 29 4 sq ft.

Rigid mineral wool insulation sheathing board that is non combustible water repellent fire resistant and sound absorbent. 8 x 15 25 x 47. Achieving greater r values in attics the higher the r value the better the thermal performance of the insulation. R value is a measure of insulation s ability to resist heat traveling through it.

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.