Crawlspace encapsulation is often a “passive” solution that uses plastic liners to trap moisture rather than addressing the hydraulic source of the water. In the Puget Sound’s heavy clay soils, trapping water against a foundation can actually increase hydrostatic pressure and lead to structural rot that goes unseen behind the plastic. At Basement Expert, we believe in Active Water Diversion. We focus on engineering-grade drainage and soil-gas management that solves the water problem permanently, rather than just hiding it behind a white sheet.