After scrubbing away all the mold growth, we applied a patented sealant called MAPS 2. This encapsulates the mold and renders it harmless and non-allergenic. MAPS 2 is also moisture-sensitive and reactivates when it gets wet to prevent any future mold growth. Since the homeowner was a contractor, he informed us that he will purchase all new insulation and replace it in each crawl space as well as purchase a dehumidifier to keep the humidity levels in the crawl spaces at a comfortable level.