Insulation levels for retrofitting existing wood-framed buildings

Zone Add Insulation to Attic
Uninsulated Attic Existing 3–4 Inches of Insulation
1 R30 to R49 R25 to R30
2 R30 to R60 R25 to R38
3 R30 to R60 R25 to R38
4 R38 to R60 R38
5 to 8 R49 to R60 R38 to R49

Insulation level is specified by R-Value. R-Value is a measure of insulation’s ability to resist heat traveling through it. The higher the R-Value the better the thermal performance of the insulation. The table above shows what levels of insulation are cost-effective for different climates.

AARCO knows the best insulation solution for your home or office


Most homes in the United States are either inadequately or incorrectly insulated. In fact, the Department of Energy estimates that any home built before 1980 have woefully insufficient levels of thermal insulation. The greatest offender in this category is the R-Value of the insulation in the attic. Without proper insulation in the attic you home will lose staggering amounts of energy, causing utility bills to skyrocket and temperatures in your home to vary greatly from season to season.

Of course you may not know that you even have this problem. Most people are unaware of exactly how much insulation they need, and how meeting Federal guidelines can save a family hundreds, if not thousands, of dollars a year.

AARCO can help you discover how much money you can save – for free.

American Attic Reinsulation Company will provide you with a totally free attic inspection. Together we can make a plan to save you money and improve your family’s quality of life. Our prices are competitive and all services are warranted. We are ready to help you make your home into a more environmentally friendly, cost-efficient and comfortable place to live. Call us today.