What happens if you don’t have a vapor barrier in a crawl space?

The absence of a crawl space vapor barrier can lead to damage and structural devastation in your home. Porous materials such as concrete, wood, and fiberglass insulation allow water vapors to penetrate them easily, resulting in mold, mildew, odors, and foundation damage. If you notice signs of potential damage, contact a professional crawl space vapor barrier installer immediately.