How Much Attic Insulation Do I Need

Click the button to calculate the amount of insulation in square feet and man hours wall and ceiling fiberglass insulation needed for this job.

How much attic insulation do i need.

The average recommended level is 17 inches of r60. It is not uncommon to see 15 to 20 of insulation in a well insulated attic. Inspecting your attic insulation. First things first you need to go up into your attic inspect the condition of the insulation and calculate the current level of insulation.

The recommended level for most attics is to insulate to r 38 or about 10 to 14 inches depending on insulation type. The higher the r value the better the thermal performance of the insulation. Input length and width of area to be insulated. 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.

How much insulation do i need in my attic. In zone 5 the average minimum requirement for attic insulation is 11 inches of r38 fill. How much insulation in attic for zones 5 7. The average recommended level is 17 inches of r60.

When adding additional insulation you do not have to use the same type of insulation that currently exists in your. Bob foley december 1 2017 at 9 27 am. The insulation in your attic should be at least 12 thick. 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.

The thicker the better. This calculator is to be used as an estimating tool only. In zone 6 the average minimum requirement for attic insulation is 14 inches of r49 fill. A few years back i added lots 6 to 9 inches to the 6 inches i had in the attic of my ranch in new england.