Considering that the crawl space comes in contact with the ground, it cannot escape from being exposed to moisture from the rain, snow, soil, and so on. Add in leaky pipes or humid air to the equation and the crawl space becomes a rather large petri dish of mold and fungus. As much damage as it causes to the structure of the house, the presence of mold and mildew can also affect the health of the residents, especially if they have respiratory conditions. Crawl space encapsulation can avoid this hazardous living condition for you.