Attic Insulation Depth R Value

Recommended home insulation r values.

Attic insulation depth r value.

Achieving greater r values in exterior walls. Foam in place insulation can be blown into walls on attic surfaces or under floors to insulate and reduce air leakage. Add the right kind of insulation. Light weight yellow pink or white.

R value is a measure of insulation s ability to resist heat traveling through it. Dense gray or near white may have black specs. Cellulose insulation has a baseline r value of 3 8 per inch. The table below shows what levels of insulation are cost effective for different climates and.

The higher the r value the better the thermal performance of the insulation. The recommended level for most attics is to insulate to r 38 or about 10 to 14 inches depending on insulation type. 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. Insulation levels are specified by r value.

These r values are a sum meaning this should be the total r value once you add up the entire depth of insulation. You can achieve better thermal performance in your attic by adding an additional layer of insulation. What it probably is depth inches total insulation r value. Some installations can yield a higher r value than traditional batt insulation for the same thickness and can fill even the smallest cavities creating an effective air barrier.

The total r value of installed insulation is calculated by multiplying its baseline r value times the depth of the insulation in inches. Insulation level are specified by r value. 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 flow.

As a benchmark one inch of solid wood has an r value of 1. You can use the small pressurized cans of foam. The higher the r value the better the thermal performance of the insulation.