If you’re anywhere near my position, the cold just kicked in where you live too, and you’re cursing your drafty home for all of its holes. We have a non-insulated crawl space making our floor icy cold. I’m currently researching the best way to tackle this! But I remember what it was like to have a non-insulated garage, where my laundry also happened to be. Doing laundry in the winter was torture for me. I never even considered there was an actual way to insulate the garage doors.
So here you have it. If you have non-insulated garage doors, rather than investing in new ones with built-in R values, easily install your own:
Exactly How to Insulate a Garage Door | The Family Handyman
You can complete the entire job in about four hours for less than $200. Just buy the materials from any home center and gather up a utility knife, tape measure, straightedge, saw, dust mask, and a hammer and nails.