Insulation has nothing to do with keeping cold out or in.
R factor in attic insulation.
As a benchmark one inch of solid wood has an r value of 1.
R value is a measure of insulation s ability to resist heat traveling through it.
Insulation level are specified by r value.
The higher the r value the better the thermal performance of the insulation.
The table below shows what levels of insulation are cost effective for different climates and.
Along with knowing the r value of a particular insulation it is also important to calculate the r value of a total system.
Determining r factor in an attic.
To choose the best insulation for your home from the many types of insulation on the market you ll need to know where you want or need to install the insulation and what r value you want the installation to achieve.
Input depth of existing blown in insulation in inches.
Click the button to calculate the approximate r value for this job.
Achieving greater r values in attics the higher the r value the better the thermal performance of the insulation.
This calculator is to be used as an estimating tool only.
Recommended home insulation r values.
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.
It s all about heat.