Basement & Foundation Waterproofing in Chicagoland

Chicagoland is close to ideal conditions for a wet basement: dense clay that holds water against foundation walls instead of letting it drain away, a high water table across much of the metro area, a freeze-thaw cycle that opens hairline cracks a little wider every year, and a large stock of older homes whose original drain tile has long since silted up or collapsed. If your basement smells musty in August, blooms white efflorescence on the walls, or takes on an inch of water every time it rains hard, it is not bad luck. It is a specific failure, and it has a specific fix.

We waterproof basements and foundations across the greater Chicagoland area, and the first thing we do is work out which problem you actually have — because the answer determines whether the right system is interior or exterior, and a contractor who only sells one of them will only ever find the one they sell. Seepage through a crack in a poured wall is a different job from hydrostatic pressure pushing up at the cove joint, which is different again from surface water arriving because the grading falls toward the house and a downspout discharges next to it. We do exterior excavation and membrane work, interior drain tile and sump systems, crack injection, sealing, and the unglamorous grading and downspout corrections that sometimes solve the whole thing for a fraction of the cost.

Waterproofing work we do

• Diagnosis firstWorking out the actual water path — seepage, hydrostatic pressure, surface water, or plumbing — before recommending a system.
• Interior drain tile systemsPerimeter drain line set in stone below slab level, tied to a sump, with the floor restored over it.
• Sump pits and pumpsPit, pump, check valve, and a discharge line that takes water far enough from the house not to return.
• Exterior excavation and membraneDigging to the footing, cleaning and sealing the wall, and applying membrane with drainage board where exterior work is the right answer.
• Footing drains and stonePerforated drain line in clean stone with filter fabric at the footing, with a real outlet rather than a dead end.
• Crack injection and repairInjecting poured-wall cracks and sealing them so they stop passing water.
• Window wells and entry pointsDrained window wells, covers, and sealing around pipe and service penetrations.
• Grading and downspout correctionRe-pitching the ground away from the house and extending downspout discharge — the cheapest fix there is, when it is the right one.