The r value per inch for different types of insulation varies depending on the.
Blown in attic insulation r value per inch.
The most common blown in material used but it can rot and grow moldy if exposed to moisture.
This calculator is to be used as an estimating tool only.
The higher the r value per inch of thickness the better job the insulation will do when you heat or cool your home.
Where you live different climates require different insulation r values.
This calculator is to be used as an estimating tool only.
For example if you have a type of insulation that has an r value of r 5 per inch of thickness you will need a depth of 6 inches of this insulation installed in your attic to reach r 30 if you live in zones 2 or 3.
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.
Loose fill fiberglass has an r value of r 2 2 to 2 7 per inch3.
Click the button to calculate the approximate r value for this job.
You will need a higher r value of insulation if you live in the northeast than if you live in southern california.
There are many ways to retrofit a home with fiberglass and.
Input length width and desired r value of the area to be insulated.
The r value of loose fill cellulose is r 3 2 to 3 8 per inch2.
These r values are a sum meaning this should be the total r value once you add up the entire depth of insulation.
Insulation depth depending on your climate energy codes require varying r values for ceiling insulation.
As a benchmark one inch of solid wood has an r value of 1.
Your home s age if your home is more than 10 year old you likely need more insulation.
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.
Along with knowing the r value of a particular insulation it is also important to calculate the r value of a total system.
Fibers from rock or recycled slag from blast furnaces.
While there are additional considerations such as venting and moisture problems to take into account when you insulate under floors the united states department of energy recommends an r 25 rating in cold climates and an r 11 in warmer parts of the country.
Click the button to calculate the depth in inches and pounds of total insulation required for this job.
Fibers from recycled post consumer paper that are treated for insect and fire resistance.
Achieving the desired r value depends on both the depth of the insulation and its density.
You can use the small pressurized cans of foam.