A crawlspace is the perfect place for mold to grow. Often it is an area of your home that is not always checked on. Crawlspaces are very moist as well.
As seen in the before photo this crawlspace had large amounts of mold covering all wood in the area. Generally during these situations the first indication of mold will be a musky odor you can smell throughout the home. These odors will be apparent when the weather warms up or when the furnace filters the smell through your duct systems.
If you smell a musky odor in your home SERVPRO of Morris/Ottawa would be happy to come find the source for you, as well as discuss ways we can get rid of the odor for you.