You need to make sure that your garage door is insulated even if you may not think of it when you have a garage. Most people take for granted the numerous benefits that come with your insulating your garage door. Cold from outside will be prevented from entering into the garage just in case there is door in the garage that leads into the main house or there is a room situated at the top of the garage. Not having insulations between the panels of the door could cause cold to enter inside the door making a great heat loss in the garage even if your door is sealed well against the elements.
If you have any kind of shop inside your garage because of being a hobbyist or you need to work on your car, you need to have a heater inside the garage, on the days when it is extremely cold, will be reduced if you have an insulated garage door. Closing the doors to your garage will not mean a thing if you have not insulated them meaning that the cold will still enter and you would still feel it as though you were outside.
It does not make it good insulation if you look and see some granules from Styrofoam inside your garage door. These granules can never be able to keep the cold out even though Styrofoam will be able to dampen the sound.
You should check the seals at the top and the bottom of the door and between the door panels when you are checking to make sure that you have an insulated garage door. It is time to replace them if they are brittle, hard and starting to crumble because normally they should be flexible and nice. Actually there are some few ways you could use to insulate your garage doors. You could let an expert do the job for you, and if you can do it by yourself, you could buy some DIY tools and get right on it because this could actually be cheaper.
This is the clue as to why you have been receiving a high heating bill if you have an attached garage or a room above it. Not having insulated your garage door in extremely cold seasons will just be the same as you leaving a window open all through. If you really want to be able to enjoy your garage space and to have heating bills that are not high, make sure you insulate the garage doors.