How Much Attic Insulation Do You Need

Most of ga al ar sc ok etc to a high of 49 for zones 6 8 i e.

How much attic insulation do you need.

How much insulation do i need in my attic. The insulation in your attic should be at least 12 thick. 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. We ve rounded up all the most important know how about attic insulation costs products prep work and installation right here.

If you want a customized reading the united states department of energy provides this how much insulation do i need calculator additionally all of the specific residential prescriptive requirements for your county and state can be found on the government s energy codes website. The table below shows what levels of insulation are cost effective for different climates and locations in the home. If you think you re among the 90 of us homes that are under insulated 1 performing a simple insulation inspection will help you determine your insulation needs. How much insulation in attic for zones 1 4.

It is not uncommon to see 15 to 20 of insulation in a well insulated 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. The higher the r value the better job the insulation does at preventing the transfer of heat. How well a particular insulation works is expressed by the r value which ranges from 2 0 to 8 0 per inch of insulation.

No matter what kind of insulation you currently have in your attic one quick way to determine if you need more is to look across the span of your attic. The zone you live in will determine how much insulation you need in your attic. Wy mt nh me wi etc. This range varies from a low of 30 for homes with heat pumps or natural gas furnaces in zone 3 i e.

Having the correct amount of attic insulation can help you maintain a comfortable temperature throughout your home and help save money on your energy bills plus prevent major issues like ice dams in the winter. Use our roll insulation calculator to estimate the amount of wall insulation crawlspace insulation or attic insulation you need for your project. Keep reading for the details. If your insulation is just level with or below your floor joists i e you can easily see your joists you should add more.

The higher the r value the better the thermal performance of the insulation. The thicker the better. R value is a measure of insulation s ability to resist heat traveling through it. Insulation level are specified by r value.