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.
How deep to make blow in insultaion in my attic.
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.
Each bag lists the required depths for a range of r values and the number of bags needed to cover 1 000 square feet at those depths.
To add to the r value of existing insulation calculate the thickness based on the.
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.
You d need a thickness of.
Measure your attic s square footage.
For batts or rolls calculate the number based on the width and length of the product you re using.
The blower should include two 50 ft.
Input length width and desired r value of the area to be insulated.
Find your zone on the map and then use the chart to determine the level of insulation you need to properly insulate your attic walls floors and crawlspaces.
This calculator is to be used as an estimating tool only.
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.
This calculator is to be used as an estimating tool only.
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.
For loose fill cellulose this translates to a total depth ranging from 8 inches.
Input length width and desired r value of the area to be insulated.
Click the button to calculate the depth in inches and pounds of total insulation required for this job.
Blown in spray foam batts and blankets.
For loose fill read labels.
Hoses that you can connect and snake into the attic.
In temperate coastal areas such as zone 3 attic insulation of at least r30 up to a maximum of r60 is recommended.
Click the button to calculate the depth in inches and pounds of total insulation required for this job.