Of course adding insulation inside a ceiling is a very complex project that your average homeowner will be hesitant to embark on.
Insulating ceiling above garage.
Insulating the ceiling is the most important part of the garage because heat rises and escapes through the roof.
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.
Garage ceiling insulation is cheap accessible and easy to install.
Insulating a garage door can be more involved than insulating the walls and ceiling.
How to insulate a garage door.
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.
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.
So before insulating go around the garage with a can of low expanding spray foam and seal all gaps and cracks that let in the daylight.
If you re using your garage enough to warrant installing a heater and or air conditioner by all means you should insulate the ceiling between the garage and an unfinished attic space above.
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.
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.
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.
When you have a room built over a garage it becomes important to insulate the garage s ceiling to prevent the heated space above the garage from losing its warmth.
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.
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.
If you are insulating the garage ceiling not only by the truss level but also up by the roofline then you must leave at least 1 1 2 to two inches of air between the fiberglass and the underside.
This can be done through blown in insulation and unfaced or faced batt insulation.
Make sure you have enough ventilation on your roof as well.