A plastic ground cover sealed to the foundation in a crawl space serves what primary purpose?

The primary purpose of a plastic ground cover sealed to the foundation in a crawl space is to control moisture in the crawl space. By creating a barrier between the ground and the air in the crawl space, the plastic cover prevents moisture from evaporating into the air, which is crucial for preventing conditions that can lead to mold growth, wood rot, and other moisture-related issues. Effective moisture control is essential for maintaining the structural integrity of the building and for ensuring a healthy indoor environment. Hence, using a plastic ground cover is a well-recognized practice to manage humidity levels and protect the overall health of the crawl space.