Installation or replacement of ground vapor barriers that reduce moisture movement from exposed soil into a crawl space.
Crawl-space problems often overlap with drainage, humidity, insulation, and wood or support conditions, so it helps to separate the moisture source from the damage it may have caused. Ask the provider what the proposed scope addresses directly and whether drainage, dehumidification, insulation, structural repair, or another follow-up service may be separate. Before contacting a provider, note the crawl-space size, existing ground covering, moisture or odor concerns, and whether water collects beneath the home.