The best game in town when it comes to mold remediation. They aren't the cheapest, but are the best. They handle anything having to do with mold and also fully seal crawlspaces and basements. In 2010, pricing estimates for remediating an entire crawl space of mold was about $1.50/sf (crawl space size). Other costs can come into play such as removing insullation (~$0.25/sf) and putting down a 6-mil moisture barrier (~$0.30/sf) or fully sealing the crawl space (~$1.50/sf) - keep in mind the square footage is the Crawl Space square footage, not necessarily the entire house square footage.