Does the house have adequate ventilation?
Poor ventilation can result in too much moisture that wreaks havoc on interior walls and structural elements. It can also exacerbate allergic reactions. Install ventilation fans in every bathroom if there are no windows, and regularly open all the windows in your home. To repair damage caused by poor ventilation, you may only have to replace drywall and other inexpensive pieces. If you have to replace a structural element, it will be more expensive.