It has a lower r value per inch than closed cell foam and is vapor permeable.
Attic insulation r values inches.
Small gray flat pieces or fibers from newsprint cellulose 3 7 x depth.
You can achieve better thermal performance in your attic by adding an additional layer of insulation.
R value is a measurement of thermal resistance and measures the ability of heat to transfer from one side of an object to another.
Vermiculite or perlite 2 7 x depth.
Fiberglass 2 5 x depth.
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.
Depth inches total insulation r value.
Dense gray or near white may have black specs.
The higher the r value the better the thermal performance of the insulation.
Batts light weight yellow pink or white.
Achieving greater r values in exterior walls.
Closed cell spray foam insulation.
This calculator is to be used as an estimating tool only.
R value of insulation by type.
Click the button to calculate the approximate r value for this job.
Rock wool 2 8 x depth.
Here are the r values per inch of the most common types of insulation.
As a benchmark one inch of solid wood has an r value of 1.
Light weight yellow pink or white.
Closed cell spray foam has a far better r value per inch than other less effective insulations like cellulose fiberglass or even open cell foam.