The five most common sources of basement water intrusion are the joint between the foundation footing and the wall, windows, tiny spaces around the steel form ties from when the foundation walls were poured; other cold poured joints in the walls, and foundation cracks, even newly sealed ones.
In all of these cases, water is generally entering the home as run-off that has seeped into the ground and found its way into the basement. However, on some parts of Long Island, wet basements can be the result of a high or perched water table. This also doesn’t necessarily mean that the water will come directly up through the floor, however, because the water may find that the easiest way in may still be the footing joint or the walls.
