Insulate Floor Over Garage

Insulate garage floors using rigid foam and plywood prior to applying finish flooring.

Insulate floor over garage.

Insulate ducts and plumbing and put them close to the floor. This can be done through blown in insulation and unfaced or faced batt insulation. I wrote a big article discussing whether you should insulate your garage. Controlling moisture in a garage is done by using exterior grade plywood sheets laid over the foam insulating panels and also by laying down a sheet of polyethylene plastic as a vapor barrier to.

What insulation to use in the garage. A floor with ducts also should be insulated with a continuous layer of thick rigid. Insulation in floors including above garage and cantilevered floors is installed to maintain permanent contact with underside of subfloor decking. Insulating the attic above the garage will help keep temperatures in the garage a bit more stable but it won t have any appreciable effect on energy bills.

But since it s a floor to the room insulating it won t have as much of an effect as the room s ceiling. Floor above a garage smaller room over a large garage. The best way to insulate the finished room over the garage is going to be just like any other room in your house insulate the exterior walls the ceiling or attic and the floor. The options you have for the room in general are fiberglass batts blown in cellulose blown in cellulose injection foam and spray foam.

To insulate the floor of the room above the garage seal the space between the floor of the room and the ceiling of the garage and the top plate and the header joist with insulation. This is a smart first step before installing a new floor. If you have a conditioned room over your garage it would be a good idea to insulate the garage ceiling if it s easily accessible. If hvac ducts are routed through the floor assembly the floor joists must be deep enough to install several inches of insulation under the ducts.

When you should insulate the garage if your home s hvac system does extend into the garage then the attic above it should be insulated as it would for any other room of the house. If you didn t jump over to that article i ll sum up the most important thing you need to know here. A continuous air barrier is installed in the building envelope including rim joists and exposed edges of insulation. Concrete is cold and hard but an insulated concrete slab can make a heated garage significantly warmer and more energy efficient.