The higher the r value per inch of thickness the better job the insulation will do when you heat or cool your home.
Blown in attic insulation r value per inch.
The r value of insulation is a measure of how well it reduces the flow of heat and cold into and out of your house.
Achieving the desired r value depends on both the depth of the insulation and its density.
There are many ways to retrofit a home with fiberglass and.
You can use the small pressurized cans of foam.
Click the button to calculate the depth in inches and pounds of total insulation required for this job.
The r value per inch for different types of insulation varies depending on the.
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.
These r values are a sum meaning this should be the total r value once you add up the entire depth of insulation.
The r value of loose fill cellulose is r 3 2 to 3 8 per inch2.
This calculator is to be used as an estimating tool only.
As a benchmark one inch of solid wood has an r value of 1.
Where you live different climates require different insulation r values.
Insulation depth depending on your climate energy codes require varying r values for ceiling insulation.
This calculator is to be used as an estimating tool only.
Click the button to calculate the approximate r value for this job.
Loose fill fiberglass has an r value of r 2 2 to 2 7 per inch3.
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.
Input length width and desired r value of the area to be insulated.
Along with knowing the r value of a particular insulation it is also important to calculate the r value of a total system.
Foam in place insulation can be blown into walls on attic surfaces or under floors to insulate and reduce air leakage.
You will need a higher r value of insulation if you live in the northeast than if you live in southern california.
Input depth of existing blown in insulation in inches.
The most common blown in material used but it can rot and grow moldy if exposed to moisture.
Fibers from rock or recycled slag from blast furnaces.
Your home s age if your home is more than 10 year old you likely need more insulation.