I live in an older duplex. Built in the 70's. So it's not that old I guess, but not new. I've always been suspect about the insulation of the place. It stays very cold inside even though it's nice out. It's warmer outside than it is inside. It's a little confusing to me. If the cold can get in so easily, why does it not go out? Cold gets in and it stays in. The house gets sun and everything. I just thought it would warm up a little better than it does.

Is there a way I can find out how the place is insulated without tearing the walls down? Or am I thinking about this in the completely wrong way?