1. to make sure all crawl space vents are close .
2. you can check all exterior doors and windows do not have air leak .
3. check attick insulation should be minimum 10'' or you can add more insulatio ... read more
1) Fiberglass tubs are notorious for getting hairline cracks that usually open up when someone is standing in it with the water running.
2) Also it might be a leak from upstream (plumbing behind the w ... read more