When you notice a musty smell near your bathroom or kitchen walls, there's a good chance moisture has been seeping behind the drywall. Over time, that trapped dampness creates the perfect environment for mold to grow undetected, especially around plumbing pipes and fixtures. Hidden mold not only damages the structure but can also affect your family's health, so it's important to investigate any suspicious stains or soft spots in those areas. mold behind drywall near plumbing 67