This article explains when professional mold remediation may be necessary. Warning signs include mold covering a wall, ceiling, floor, or multiple areas; persistent musty odors; mold returning in the same location; spreading water stains or discoloration; damp drywall, carpet padding, insulation, or other porous materials; growth near HVAC equipment or ductwork; water damage extending into concealed areas; substantial growth that cannot be cleaned safely; and uncertainty about how far the problem extends.
