Milwaukee Basement Waterproofing & Leak Repair Experts Since 1956
“You have time to call us…”
Nature doesn’t like man-made holes in the ground. Soil pushes. Water collects. Hydrostatic pressure builds. Over time, basements leak.
In Southeastern Wisconsin, expansive clay soil and freeze-thaw cycles place constant pressure on foundation walls. When grading shifts or drain tile systems fail, water finds its way inside.
At McCoy Contractors, we don’t just seal cracks — we diagnose the cause of water intrusion.
And in many cases, the solution is simpler than homeowners expect.
Common Basement Leak Locations in Milwaukee Homes
Leaks Up High on the Wall
Often caused by improper exterior grading or surface runoff.
Leaks High UpSeepage Where Floors Meets the Wall
Usually indicates hydrostatic pressure or a failing drain tile system.
Seepage at the FloorEfflorescence & Wall Staining
White mineral deposits are signs of ongoing moisture movement through masonry.
Why Basements Leak in Milwaukee
Milwaukee homes face unique environmental pressures:
- Expansive clay soils
- Freeze-thaw ground movement
- Heavy seasonal rainfall
- Aging drain tile systems
- Improper grading and landscaping changes
Most water problems are exterior water management failures — not structural collapse.
Our Basement Waterproofing Solutions
Interior Drain Tile Systems
Installed beneath the slab to collect groundwater and redirect it to a sump system.
Sump Pump Installation & Backup Systems
Primary and battery backup protection to keep your basement dry during storms and outages.
Foundation Crack Sealing
Epoxy or polyurethane injection for active leaking cracks.
Exterior Waterproofing
Excavation, membrane systems, and exterior drain tile for long-term protection.
Grading & Downspout Corrections
Simple exterior adjustments that eliminate recurring water entry.
When Is It Structural — and When Is It Just Water?
This is important for both SEO and trust.
- Bowing walls or major displacement = structural foundation repair
- Isolated water seepage = waterproofing issue
About 80% of homeowners we evaluate for basement issues do not require structural repair.
Proper diagnosis matters.
Why Milwaukee Homeowners Trust McCoy
- Serving Southeastern Wisconsin since 1956
- Deep understanding of local soil conditions
- Honest evaluations
- Long-term repair philosophy
- Clean, respectful crews
Call (262) 781-4045 to schedule a basement waterproofing evaluation.
Everyone on the project was 10+
Bob Teper, Homeowner