1. If soil is damp, as much as 20 gallons of water per 24 hours can evaporate into the air in a 1,400 sq. ft. crawl space.
2. Primary causes of excess moisture include: surface runoff water, poor ventilation and no or poor ground vapor barrier.
3. Signs of excess moisture in crawl space: soil is wet, surface organism growth on floor joists, wet insulation, musty odors in crawl space or living areas and excessive moisture in living areas tending to migrate towards windows.