Groundwater & Basement Water Intrusion in Arlington Heights, IL

Once the storm system is at capacity the water sits on the surface until the system catches up, and it finds the lowest opening available. In a subdivision of full basements that is often a window well, a stairwell drain, or the gap around a service entry rather than the foundation wall itself. Those entry points are worth inspecting specifically, because they are cheap to address and they are where most of this water actually gets in.

That is the common story in this stock. The wall was weeping onto bare concrete for decades and nobody minded; finishing it put framing and drywall against the same wall without adding any drainage beneath the slab. The water still arrives, but now it arrives out of sight. Metering behind the finish, rather than judging by what the floor looks like, is the only way to know what is happening back there.

It can be, and it is the more expensive of two options that both work. Excavating and treating the outside of the wall addresses the water before it arrives but means digging around the foundation. An interior perimeter drain to a sump relieves it after arrival and is far less disruptive. On a tight lot with mature landscaping, the interior approach is usually the one that gets chosen, and it is not a compromise so much as a different point of attack.