Get matched with top insulation pros in Elberta, AL

You don’t need to remove old insulation before adding new insulation. As long as the old insulation is still in good shape—not wet, physically damaged, or moldy—then you can stack new insulation on top of old insulation to get a compounding effect. You can also mix different types of insulation, like adding blown-in insulation around existing fiberglass batt insulation or installing rigid insulation boards over rafters in your attic that already have batt insulation installed. If your existing insulation is very old or damaged, though, you’ll likely see more benefit from removing it and replacing it instead.

On average, attic insulation costs $1 to $3 per square foot, so for a 1,800-square-foot attic, you’d pay $1,800 to $5,400, including materials and labor. The cost can vary depending on what type of insulation you use, how many insulation layers you need, and whether you need to remove existing insulation first.

While more is seemingly always better when it comes to energy efficiency, your house does need some interaction with its environment. Adding too much insulation can affect your home's ability to breathe. Breathing simply means ventilating itself to reduce accumulated moisture within it. Too much insulation can physically block the venting ability or be enough to trap the moisture and damage the insulation or the house.

Through R-value assessments based on climate and existing insulation.