There is no question that you need to insulate all exterior walls in your home. There is one exterior wall that often gets overlooked though: the wall between your living area and your garage.
Treat as an exterior wall
Though the wall between the living area and an attached garage may not seem like an exterior wall, it is considered one since the garage is an uninsulated space and doesn’t usually have heating or air conditioning. If the garage is uninsulated then the living area has to be insulated from the garage like it is outside. This sometimes doesn’t get done when the house is getting built because of budget cuts, and an inspection of your home by an energy analyst will tell you if your home has insulation in that exterior-acting wall.
If you do need to put in additional insulation, or even any insulation, into the wall between your home and an attached garage, blown-in cellulose insulation into the wall via drilled holes that will be sealed after the insulation process. Another option is fiberglass batts if the stud bays in the wall are open.
Insulating all garage walls
Some people consider insulating all the walls in their garage. This can be a great option for you if you spend a lot of time out in your garage working on any sort of project. It will make your work space much more comfortable to spend time in.
