How Many Inches Of Insulation Is Needed In Attic

First things first you need to go up into your attic inspect the condition of the insulation and calculate the current level of insulation.

How many inches of insulation is needed in attic.

Once you ve determined the r value of insulation you need to decide which type of insulation you will use. The average recommended level is 17 inches of r60. 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. 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.

This calculator is to be used as an estimating tool only. If your attic insulation is only a few inches thick or if you can see the ceiling joists you re wasting money on your heating and cooling bills. The average recommended level is 17 inches of r60. Achieving greater r values in attics the higher the r value the better the thermal performance of the insulation.

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. In zone 6 the average minimum requirement for attic insulation is 14 inches of r49 fill. The thicker the better. For loose fill cellulose this translates to a total depth ranging from 8 inches.

The insulation in your attic should be at least 12 thick. Click the button to calculate the depth in inches and pounds of total insulation required for this job. Depending on type you will need somewhere between 10 and 18 inches of insulation to meet the recommended insulation values. 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. Input length width and desired r value of the area to be insulated.