Gap around garage door

[tech3149]

2. You didn't specify what sort of home this is

Generally a garage door needs a fairly open track to move freely. My last place was a townhouse with attached garage. I had the same problem as you. It was irritating because I used the garage as a workshop. My solution was to install foam rubber seals around the tracks. Most hardware stores stock different sizes with adhesive backing that only take a few minutes to put up. The stuff is sold as doorway or window seals. The stuff I used was about 1/4" thick and 2" wide. Worked pretty well. I used a little piezo heater during the winter and that $20 cut down the heater operation by half.