Once you have a clean canvas to start with, check the weather stripping on your doors and windows. These openings are often the places where the most heat is lost for every structure. If the weather stripping is brittle or cracked, you will want to replace it. For garage doors, make sure that the weather stripping contacts the door correctly.
Insulate the Door and Walls
Adding insulation to your walls sounds like a no-brainer. It just makes sense, but you may also want to insulate your garage door. There are kits to help you with this, or you could find someone that offers these kinds of garage door services. Again, your door is likely the place where you lose the most amount of heat.
Heat It Up
If your garage has no heat source, your weather stripping and insulation will be for naught. They keep the cold out, but they do not provide any way to heat the room up. A small space heater can help you improve the warmth of the room, and the insulation will keep the room warmer. A garage door specialist in Alpharetta can help you with any problems you may experience and can give you tips on how to make your garage more comfortable during the cold winter months.