Serving Wilmington
Groundwater & Basement Water Intrusion in Wilmington, DE
Basement seepage, failed sumps, and hydrostatic pressure against the foundation are extracted and dried, and the path from the ground is identified so the loss does not repeat. Groundwater and basement seepage are extracted and dried only after the path from the soil is identified — a wall, a slab, a drain, or a failed sump. Drying the interior without stopping that path returns the same water to the same floor.
Frequently asked questions
Two rivers and the tide meet here.
They do, and each brings a different timing. The rivers respond to rainfall in their own catchments over hours to a day, while the tide runs on its own cycle regardless of weather. The events that matter are the ones where high river flow arrives on a high tide and has nowhere to discharge.
The cellar drain runs backwards in a downpour.
One pipe beneath the older streets was built to take rainwater and household waste together. A downpour puts far more into it than the household side ever contributes, and once it is full the excess pushes back out at whatever opening sits lowest on the block. Nothing inside the building has failed when that happens.
The rowhouses leave no open ground at all.
Continuous roof and paving across a block sends close to the entire rainfall to the street within minutes, so the drainage handles a volume that open ground of the same area would have partly absorbed. The density here dates from a century with no expectation of managing stormwater. It is a real hydrological condition rather than a matter of appearance.
The Wilmington overview carries this FAQ with the city research.