Blow In Attic Insulation R Value

The higher the r value the better the thermal performance of the insulation.
Blow in attic insulation r value. Add insulation to attic. Click the button to calculate the depth in inches and pounds of total insulation required for this job. There are many ways to retrofit a home with fiberglass and. You will need a higher r value of insulation if you live in the northeast than if you live in southern california.
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. Your home s age if your home is more than 10 year old you likely need more insulation. If your home is in a warmer climate you require an r 38 or higher or about 12 more. Loose fill fiberglass has an r value of r 2 2 to 2 7 per inch3.
Recommended insulation levels for retrofitting existing wood framed buildings. Input depth of existing blown in insulation in inches. Input length width and desired r value of the area to be insulated. This calculator is to be used as an estimating tool only.
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. As a benchmark one inch of solid wood has an r value of 1. You d need a thickness of. R value is a measurement of thermal resistance and measures the ability of heat to transfer from one side of an object to another.
The r value of loose fill cellulose is r 3 2 to 3 8 per inch2. Where you live different climates require different insulation r values. 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. 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. This calculator is to be used as an estimating tool only. 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. Achieving greater r values in exterior walls.
Achieving the desired r value depends on both the depth of the insulation and its density. Click the button to calculate the approximate r value for this job.