For loose fill cellulose this translates to a total depth ranging from 8 inches.
How many inches of insulation in attic.
11 pests that could be hiding in your attic step 5.
Input length width and desired r value of the area to be insulated.
Get exactly what you need with lowe s blown in insulation calculator looking to install blown in insulation but don t know how much you need.
In zone 6 the average minimum requirement for attic insulation is 14 inches of r49 fill.
Depending on type you will need somewhere between 10 and 18 inches of insulation to meet the recommended insulation values.
The average recommended level is 17 inches of r60.
Input depth of existing blown in insulation in inches.
From the drywall depending on the insulation type.
In temperate coastal areas such as zone 3 attic insulation of at least r30 up to a maximum of r60 is recommended.
The recommended level for most attics is to insulate to r 38 or about 10 to 14 inches depending on insulation type.
In zone 5 the average minimum requirement for attic insulation is 11 inches of r38 fill.
First things first you need to go up into your attic inspect the condition of the insulation and calculate the current level of insulation.
This calculator is to be used as an estimating tool only.
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.
Once you ve determined the r value of insulation you need to decide which type of insulation you will use.
Then check out our handy insulation calculator.
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.
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.
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.
This calculator is to be used as an estimating tool only.
Click the button to calculate the approximate r value for this job.
In the coldest climates insulating up to r 49 is recommended.