While a home’s crawlspace can be home to a vast amount of spiders, bugs, and other kinds of undesirable guests; it can also be an unwelcome source of moisture.
As ground moisture migrates upward, it can be trapped underneath the house, leading to possible structural damage. I’ve even seen it begin to buckle hardwood floors inside the home.
Putting a simple barrier of plastic on the ground is the best preventative measure you can take. Use a thicker type of plastic sheet with a thickness of around 6-mils, and cut it into manageable pieces.
Get a little help, and be prepared for about an hour’s worth of crawling under your house. But, once the plastic is in place and covering the entire crawlspace, moisture worries will be at a minimum.