At the very minimum, Home Energy Rescue installs insulation to meet Department of Energy ENERGY STAR standards for home insulation. In the Washington Region, ENERGY STAR recommends an insulation R-value of R-49.
Do I have enough 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. If your insulation is just level with or below your loor joists (i.e., you can easily see your joists), you should add more. If you cannot see any of the loor joists because the insulation is well above them, you probably have enough and adding more may not be cost-effective. It is important that the insulation be evenly distributed with no low spots; sometimes there is enough insulation in the middle of the attic and very little along the eaves.
How much should I add?
Insulation levels are specified by R-Value. R-Value is a measure of insulation’s ability to resist heat transfer. The higher the R-Value, the better the thermal performance of the insulation.
Now that you’ve air-sealed your attic and basement, check your attic insulation levels and add more if necessary. The attic is the easiest place to add insulation to improve your comfort and the energy eficiency of your home.