Get your questions answered about insulating your existing home with foam.
RetroFoam of Michigan has more than 15 years of experience insulating thousands of homes across the Mitten, so we can help answer this question for you.
When to Remove the Old Insulation Before Installing the New
Like many things in life, different situations will have different solutions. For example, the way the foam insulation is installed and the cleanup necessary in an attic is vastly different than in the walls.
Any space that will have spray foam insulation installed, like the attic, crawl space, or rim joist will need to be completely emptied of the old insulation. A good contractor will want to remove that old fiberglass or cellulose so the spray foam can get into every nook and cranny, creating an air barrier.
Luckily getting the old traditional insulation out of the attic, crawl space, and rim joist is only hard if you have to do it yourself. Most contractors will take care of the dirty work for you. A crew will come to your home and vacuum the old insulation up if its blown in or carry out the fiberglass batts. They will also dispose of the old material, so you don’t have to.