For loose fill cellulose this translates to a total depth ranging from 8 inches.
How many inches of insulation in attic.
Add the right kind of insulation when adding additional insulation you do not have to use the same type of insulation that currently exists in your attic.
In zone 5 the average minimum requirement for attic insulation is 11 inches of r38 fill.
Inspecting your attic insulation.
From the drywall depending on the insulation type.
This calculator is to be used as an estimating tool only.
The average recommended level is 17 inches of r60.
The recommended ceiling insulation level for most attics is r 38 or about 12 to 15 in.
Achieving greater r values in attics the higher the r value the better the thermal performance of the insulation.
The average recommended level is 17 inches of r60.
In zone 6 the average minimum requirement for attic insulation is 14 inches of r49 fill.
Input depth of existing blown in insulation in inches.
Then check out our handy insulation calculator.
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.
Depending on type you will need somewhere between 10 and 18 inches of insulation to meet the recommended insulation values.
This calculator is to be used as an estimating tool only.
Your attic should have a certain amount of insulation in it and the recommended level of insulation for your attic is dependent on where you live.
Once you ve determined the r value of insulation you need to decide which type of insulation you will use.
In temperate coastal areas such as zone 3 attic insulation of at least r30 up to a maximum of r60 is recommended.
11 pests that could be hiding in your attic step 5.
Input length width and desired r value of the area to be insulated.
In the coldest climates insulating up to r 49 is recommended.
Click the button to calculate the depth in inches and pounds of total insulation required for this job.
Click the button to calculate the approximate r value for this job.