
Originally Posted by
def90
You can have an energy auditor come out to the house and do an IR scan of the walls and ceiling and they can tell you where your biggest issues are and they can tell you where to use your money in the most efficient way possible.
I'm guessing the concrete/tile floor on the converted garage is just one of the issues, if you've ever camped and slept directly on the ground without an insulated pad you would know how the ground will suck all of the heat out of you no matter how good of a sleeping bag you have. I wouldn't doubt if the old garage walls have close to zero if any insulation in the walls and the ceiling above along with the rest of the house if it was built more than 30 years ago.