How can I find and eliminate musty smells in my bedrooms and bathroom? These occur in the first floor above a crawlspace which frequently has standing water. I've posted separately about making a vapor barrier, but here I'd like to ask about the smells.
One of my bedrooms has smelled musty for 20 years. I tore down one of its external walls, did not find any mold, but replaced the 50-year-old insulation which smelled bad. Could that mild insulation smell have been seeping through the sheetrock into the room? Must I tear down the other external wall and replace its insulation?
The bathroom sheetrock is only two years old, yet smells very damp. Inside one wall, there are small gaps in the subfloor around the water and sewer pipes. This allows wet crawlspace air into the wall, but could that small quantity cause such a smell? Or could I check for a leaking sewer or water pipe? How can I treat the inside of this wall to remove the smell? I will seal it from below, but want to treat it first.
Thank you for your help.