Basement Spring Water: Comprehensive Drainage and Waterproofing

House on spring. Sump pump runs constantly (even dry weeks). Rain = backyard flooding + nonstop pump. Daily dehumidifier emptying. Mold concern. 9 months ownership. 0.25 acre, flat, rocky, southern CT. Pump discharges to street. Wants to dry/redirect subsurface flow.

Three-Layer Solution (Often Combined)

1. Surface management: Swales, French drains, catch basins to divert water around house. Grade away 6+ feet.
2. Exterior waterproofing: Excavate foundation, reapply waterproofing, gravel backfill, French drain at footing, daylight drain.
3. Interior waterproofing: Alternative if excavation impossible.

Cost Reality

Typically $10,000+. Consult local specialists.

Discharge Location

Pump must discharge at lower elevation. Street discharge = local code issue.

Sean J. Murphy
SEI / Southeastern Engineering / Amenity Architects