When there is a decent amount of moisture but no air flow mold tends to grow. Don't freak out, call SERVPRO of Milwaukie/ Happy Valley. We have negative air machines that will take all the dirty air and filter it out as well as de-humidification machines that will help control the moisture in the air. We will also remove the affected drywall to ensure we get everything we can see. A containment will be built to make sure no mold spores are spread to any areas of your home, so no further damage occurs. Our products will also help with the musty odor because we know just how bad the smell is. If you have ANY questions do not hesitate to call us at 503-652-3997.