How Much Insulation Is Needed In The Attic

Contractor or insulation installer s fee.

How much insulation is needed in the attic.

The main factors that impact the cost are. 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. Most of ga al ar sc ok etc to a high of 49 for zones 6 8 i e. You can do it yourself for about 500.

Insulation level are specified by r value. First things first you need to go up into your attic inspect the condition of the insulation and calculate the current level of insulation. Wy mt nh me wi etc. According to home advisor insulating your attic can cost between 1700 to 2100.

In zone 5 the average minimum requirement for attic insulation is 11 inches of r38 fill. For example if you have a type of insulation that has an r value of r 5 per inch of thickness you will need a depth of 6 inches of this insulation installed in your attic to reach r 30 if you live in zones 2 or 3. The table below shows what levels of insulation are cost effective for different climates and locations in the home. Blown in insulation overview.

It is not uncommon to see 15 to 20 of insulation in a well insulated attic. The higher the r value the better job the insulation does at preventing the transfer of heat. How much insulation in attic for zones 5 7. If you need to add insulation in your attic save big by blowing in cellulose insulation yourself.

Inspecting your attic insulation. Square footage of your attic. 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. This range varies from a low of 30 for homes with heat pumps or natural gas furnaces in zone 3 i e.

The insulation in your attic should be at least 12 thick. In zone 6 the average minimum requirement for attic insulation is 14 inches of r49 fill. How much does attic insulation cost. The average recommended level is 17 inches of r60.

How much insulation do i need in my attic. The pros charge 1 500 to 2 000 to do a 1 200 sq ft. Deciding how much insulation your attic needs is a matter of knowing the r value of your insulation material and the total r value you need your attic to meet then purchasing enough material to make the equation work. The higher the r value the better the thermal performance of the insulation.

The thicker the better. How well a particular insulation works is expressed by the r value which ranges from 2 0 to 8 0 per inch of insulation. R value is a measure of insulation s ability to resist heat traveling through it. These r values are a sum meaning this should be the total r value once you add up the entire depth of insulation.

The average recommended level is 17 inches of r60.