North Carolina

Crawl spaces are also prone to moisture problems caused by water vapor that rises from the ground and gets trapped in the enclosed space. Fortunately, you can add plastic sheeting as a water vapor barrier to correct the problem or prevent it from occurring.
A vapor barrier slows down ground moisture from affecting a house sitting above it. The barrier is made of rolls of ordinary sheet plastic that are laid down on the ground in a crawl space to trap water in the ground from evaporating or condensing.