It is not uncommon to see 15 to 20 of insulation in a well insulated attic.
How much attic insulation do i need.
In zone 6 the average minimum requirement for attic insulation is 14 inches of r49 fill.
This calculator is to be used as an estimating tool only.
Add the right kind of insulation.
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.
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.
Input length and width of area to be insulated.
In zone 5 the average minimum requirement for attic insulation is 11 inches of r38 fill.
The average recommended level is 17 inches of r60.
The higher the r value the better the thermal performance of the insulation.
Noticeable difference in comfort and less heat to warm the house.
How much insulation do i need in my attic.
The insulation in your attic should be at least 12 thick.
The thicker the better.
When adding additional insulation you do not have to use the same type of insulation that currently exists in your.
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.
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 average recommended level is 17 inches of r60.
Bob foley december 1 2017 at 9 27 am.
How much insulation in attic for zones 5 7.