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.
How deep to make blow in insultaion in my attic.
The blower should include two 50 ft.
Click the button to calculate the depth in inches and pounds of total insulation required for this job.
Each bag of fiberglass insulation will cover approximately 65 square feet of attic space to a depth of 10 inches cellulose insulation covers half as much.
Measure your attic s square footage.
Input length width and desired r value of the area to be insulated.
Your choice in insulation can make a real difference in cleanup and mitigation after a burst pipe or house fire.
Hoses that you can connect and snake into the attic.
For loose fill cellulose this translates to a total depth ranging from 8 inches.
Your helper will feed the blown in insulation into the hopper while you work the hose up in the attic photo 5.
To add to the r value of existing insulation calculate the thickness based on the.
Blown in spray foam batts and blankets.
Click the button to calculate the depth in inches and pounds of total insulation required for this job.
This calculator is to be used as an estimating tool only.
Achieving greater r values in attics the higher the r value the better the thermal performance of the insulation.
Ten inches of blown insulation provides an insulating value of approximately r 30 1 inch of fiberglass provides about r 2 7 while 1 inch of cellulose is approximately r 3.
You d need a thickness of.
In temperate coastal areas such as zone 3 attic insulation of at least r30 up to a maximum of r60 is recommended.
To insulate to r value 50 with an r value of 3 5 per inch you will need 50 divided by 3 5 or about 14 inches.
Your options for attic insulation range from radiant barriers to sheets of mineral wool but most homeowners stick with products made from cellulose or fiberglass.
For batts or rolls calculate the number based on the width and length of the product you re using.
Input length width and desired r value of the area to be insulated.
This calculator is to be used as an estimating tool only.