How Much Insulation Is Needed In The Attic

R value is a measure of insulation s ability to resist heat traveling through it.

How much insulation is needed in the attic.

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. How well a particular insulation works is expressed by the r value which ranges from 2 0 to 8 0 per inch of insulation. 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.

Inspecting your attic insulation. The higher the r value the better job the insulation does at preventing the transfer of heat. Type and material of your 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.

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. The insulation in your attic should be at least 12 thick. In zone 5 the average minimum requirement for attic insulation is 11 inches of r38 fill.

The main factors that impact the cost are. Square footage of your attic. If you need to add insulation in your attic save big by blowing in cellulose insulation yourself. According to home advisor insulating your attic can cost between 1700 to 2100.

The thicker the better. Insulation level are specified by r value. 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.

The table below shows what levels of insulation are cost effective for different climates and locations in the home. You can do it yourself for about 500. 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.

How much insulation do i need in my attic. Having enough insulation in your attic is one of the best ways to save energy on both heating and cooling your home. Contractor or insulation installer s fee. Wy mt nh me wi etc.

The zone you live in will determine how much insulation you need in your attic. How much does attic insulation cost. Blown in insulation overview. The pros charge 1 500 to 2 000 to do a 1 200 sq ft.

These r values are a sum meaning this should be the total r value once you add up the entire depth of insulation.