Attic Insulation R Value Zone 4

Floors r 25 to r 30.

Attic insulation r value zone 4.

The higher the r value the better the thermal performance of the insulation. R38 divided by r3 2 cellulose 11 875 loose fill insulation thickness. Uninsulated attic attic insulation run between r 49 to r 60. Included is our r value guide detailing the suggested amount of insulation dependent upon zone as provided by the u s.

Insulation level are specified by r value. R value is a measure of insulation s ability to resist heat traveling through it. Walls should be between r 19 to r 21 basement walls r13 to r 19. As a benchmark one inch of solid wood has an r value of 1.

Department of energy recommended r values for add insulation to attic zone 4. 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. Existing attic 3 4 inches of insulation r 38. Achieving greater r values in attics the higher the r value the better the thermal performance of the 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 along with knowing the r value of a particular insulation it is also important to calculate the r value of a total system. Recommended home insulation r values.