How Much Insulation Is Needed In The Attic

The average recommended level is 17 inches of r60.

How much insulation is needed in the attic.

Insulation level are specified by r value. Having enough insulation in your attic is one of the best ways to save energy on both heating and cooling your home. 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 thicker the better.

This range varies from a low of 30 for homes with heat pumps or natural gas furnaces in zone 3 i e. How much does attic insulation cost. If you need to add insulation in your attic save big by blowing in cellulose insulation yourself. Blown in insulation overview.

R value is a measure of insulation s ability to resist heat traveling through it. In zone 6 the average minimum requirement for attic insulation is 14 inches of r49 fill. The zone you live in will determine how much insulation you need in your attic. The table below shows what levels of insulation are cost effective for different climates and locations in the home.

How well a particular insulation works is expressed by the r value which ranges from 2 0 to 8 0 per inch of 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. Wy mt nh me wi etc. You can do it yourself for about 500.

It is not uncommon to see 15 to 20 of insulation in a well insulated attic. In zone 5 the average minimum requirement for attic insulation is 11 inches of r38 fill. The main factors that impact the cost are. The higher the r value the better job the insulation does at preventing the transfer of heat.

The higher the r value the better the thermal performance of the insulation. The average recommended level is 17 inches of r60. Square footage of your attic. Type and material of your insulation.

According to home advisor insulating your attic can cost between 1700 to 2100. 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. 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. How much insulation in attic for zones 5 7.

The pros charge 1 500 to 2 000 to do a 1 200 sq ft. Contractor or insulation installer s fee. The insulation in your attic should be at least 12 thick. Most of ga al ar sc ok etc to a high of 49 for zones 6 8 i e.

Inspecting your attic insulation.