i started insulating the ceiling of my garage last year, but still havent finished it yet. the walls do pretty good, as there are buildings less than 4 feet from them, so it blocks most of the wind out. if we owned it, id do all the garage, and drop a stove in there, but we dont, so we dont want to put to much money into it anyway. i wish the owners would have sprung for the gold and did the whole garage insulated, but hey at least i got a roof over my head in the winter.