I have a 2 story split-foyer ranch. The bedrooms upstairs are above the garage and noticeably colder than the rest of the house (I live in Connecticut so winters get pretty cold).
There's no climate control in the garage, and the garage is partially underground on one side and entirely underground on the other (house is built into a hill). The foundation is exposed on both sides, bare concrete probably 4 feet high and sticking into the garage about 1-2 feet.
The garage doors are insulated and weather sealed, and I have two windows on the side of the garage that's partially above ground. The ceiling is finished so I can't see what kind of insulation we have between the garage and the floors above. I do know that sound doesn't carry very well, except for things hitting the surface (or vibrating like the garage door opener).
Obviously it'll be colder in the garage than in the house, but I'm looking for ways to keep it a little warmer than it is now. I'm wondering if it would be worthwhile to put insulation on the exposed foundation. I suspect not, since the cement floor of the garage will also be pulling heat out.
Any other suggestions for quick things to check for heat loss from a garage?