Loose fill fiberglass has an r value of r 2 2 to 2 7 per inch3.
Blow in attic insulation r value.
The specially designed atticat machine conditions the insulation by adding millions of tiny air pockets that give the material its insulating power and energy saving r value over time.
Achieving the desired r value depends on both the depth of the insulation and its density.
Click the button to calculate the depth in inches and pounds of total insulation required for this job.
Input length width and desired r value of the area to be insulated.
Click the button to calculate the approximate r value for this job.
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.
Attic insulation for homes that are situated in cold climates homeowners need to ensure that they have a minimum of r 49 in their attics this is equivalent to about 16 inches of fibreglass insulation.
Blowing the insulation should take less than 1 5 hours and the whole job can be completed in less than 4 hours based on a 1 000 sq.
Existing 3 4 inches of insulation.
Achieving greater r values in exterior walls.
The r value of loose fill cellulose is r 3 2 to 3 8 per inch2.
As a benchmark one inch of solid wood has an r value of 1.
The higher the r value the better the thermal performance of the insulation.
There are many ways to retrofit a home with fiberglass and.
This calculator is to be used as an estimating tool only.
This calculator is to be used as an estimating tool only.
Your home s age if your home is more than 10 year old you likely need more insulation.
You can achieve better thermal performance in your attic by adding an additional layer of insulation.
Input depth of existing blown in insulation in inches.
Add insulation to attic.
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.
When blown into attics and wall spaces loose fill fiberglass offers an average r 2 5 thermal value per inch the higher the number the greater the insulating effect.
If your home is in a warmer climate you require an r 38 or higher or about 12 more.
You will need a higher r value of insulation if you live in the northeast than if you live in southern california.
Recommended insulation levels for retrofitting existing wood framed buildings.