Determining whether you need mold remediation depends on several factors, including the extent of the mold growth, the type of mold present, the location of the mold, and the potential health risks associated with the mold. If you have a large area (greater than 10 square feet) affected by mold or if the mold is present in multiple areas of your property, professional remediation is usually necessary. Handling large-scale mold growth requires specialized equipment, expertise, and containment measures to ensure proper removal. If you suspect hidden mold behind walls, in crawl spaces, or other inaccessible areas, it's advisable to seek professional help. Mold can grow in hidden areas due to moisture problems, leaks, or inadequate ventilation. Professionals can conduct thorough inspections, identify hidden mold, and develop an appropriate remediation plan.