Serving New York
Groundwater & Basement Water Intrusion in New York, NY
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
An inch in half an hour did what an inch overnight does not.
The system here is beaten by rate, not by accumulation. A steady rain is carried away without difficulty; twenty violent minutes deliver more than the pipes can accept, and the surplus goes to whatever openings are lowest, which in this city means areaways, stairwells and basement doors. A forecast that mentions rates is worth acting on in a way that one mentioning a wet week is not.
The apartment is below the sidewalk. What is realistic?
Knowing the route water takes and keeping the lowest openings defended, because there is no version of below-grade living here that excludes water entirely during an extreme cell. A barrier at the door, a step up rather than down, nothing of value on the floor, and a clear way out matter more than any drainage work. Those are cheap and they are what changes outcomes.
The building lost heat and elevators from water in the basement.
In a large building the plant is usually below ground, so a flooded lower level takes out the elevators, the heat, the hot water and the pumps at once, and the damage is measured in weeks of service rather than wet carpet. Protection at the ramp, the areaway and the vents matters more than anything on the upper floors, because the consequence is out of proportion to the depth.
These questions come from the New York page.