Attic Insulation Thickness R Value

The r value depends on the type of insulation its thickness and its density.

Attic insulation thickness r value.

Your home s age if your home is more than 10 year old you likely need more insulation. 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. Foam in place insulation can be blown into walls on attic surfaces or under floors to insulate and reduce air leakage. The r value of some insulations also depends on temperature aging and moisture accumulation.

The table below shows what levels of insulation are cost effective for different climates and. There are many ways to retrofit a home with fiberglass and. 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. Meaning if you use a tight air seal you don t need to use as high of a total r value.

Insulation levels are specified by r value. Insulation project calculator how to install naima r value certification product training videos colab learning video library for pros distributor locator why owens corning insulation propink vs. The recommended level for most attics is to insulate to r 38 or about 10 to 14 inches depending on insulation type. When calculating the r value of a multilayered installation add the r values of the individual layers.

Along with knowing the r value of a particular insulation it is also important to calculate the r value of a total system. The higher the r value the better the thermal performance of the insulation. Where you live different climates require different insulation r values. You will need a higher r value of insulation if you live in the northeast than if you live in southern california.

Achieving greater r values in exterior walls. R value is a measure of insulation s ability to resist heat traveling through it. Add the right kind of insulation. 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. Insulation level are specified by 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 higher the r value the better the thermal performance of the insulation.

You can use the small pressurized cans of foam. Spray foam pink fiberglas vs. You can achieve better thermal performance in your attic by adding an additional layer of insulation. Recommended home insulation r values.

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