Quote:
Originally Posted by vonsmog
Most heat loss is out the ceiling (heat rises), so attic insulation is more important than wall,
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I'll second this. We've never had "cold walls", even in the dead of winter (-30C/about the same F), but we had massive heat loss in the house until we reinsulated our attic. Immediate improvement, as in, that very day. Temperature rose at least 5 degrees within an hour or so - it was about 10C out and we had to turn the heat down. The winter was much warmer and the summer much cooler. Wish we did it years ago.