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.
Insulating ceiling over garage.
Use a special foil backed blanket insulation to fit over the inside of the garage door.
Most garage door insulation has an r value of between r 8 and r 12 because it is so thin to fit the space.
You can insulate the walls ceiling and door of the garage to the highest r value possible but if you fail to fill those air gaps you ll still be wasting a lot of heat.
This will make the garage space more appealing to work in and it will allow you to store a greater variety of items that may currently be cluttering up your house.
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.
Insulating a garage door can be more involved than insulating the walls and ceiling.
But since it s a floor to the room insulating it won t have as much of an effect as the room s ceiling.
If you have a bedroom directly above the garage that room will experience the wrath of the weather outside if your garage does not have proper insulation.
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.
Of course adding insulation inside a ceiling is a very complex project that your average homeowner will be hesitant to embark on.
Always remember to add a vapor retarder to your installation of ceiling insulation.
Forgetting to add a vapor retarder.
Since a garage is generally used to store lawn equipment and vehicles that have combustible fuel it is better to stay away from this type of material.
This will help to prevent all sorts of garage floor condensation problems.
Insulating the garage ceiling is a quick and simple way to warm up one of the coldest parts of your home.
Insulating the ceiling is the most important part of the garage because heat rises and escapes through the roof.
If there is an finished space over the garage insulate at the garage ceiling.
Similar to wearing a hat in the winter you need to make sure the top of the garage is protected to trap the heat in.
Garage ceiling insulation is cheap accessible and easy to install.
If you plan on using your garage for temporary activities like a mechanic or woodworking shop you would insulate both the interior and exterior walls.
This adds insulation to the garage door without impeding its functionality.
How to insulate a garage door.
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 there is no finished space insulate at the interior wall.