In Southeastern WI, basement leaks are a common headache due to our region’s climate, soil composition, and older housing stock. Here are some of the most common causes:
1. Heavy Clay Soil
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The soil in much of southeastern Wisconsin, including Greenfield, has a lot of clay, which expands when wet and contracts when dry.
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This expansion and contraction can put pressure on basement walls, leading to cracks and water intrusion.
2. Poor Grading Around the Foundation
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If the land slopes toward your house, water will pool near the foundation.
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Over time, this can cause leaks, especially during spring thaw or after heavy rains.
3. Faulty or Missing Gutters/Downspouts
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Clogged or poorly placed downspouts dump water right at the base of your house.
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That water can then seep down along the foundation and into the basement.
4. Cracks in Foundation Walls or Floor
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Over time, foundation walls and floors can crack from pressure, settling, or freezing/thawing cycles.
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Water can seep in through even the smallest cracks.
5. Hydrostatic Pressure
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When the ground becomes saturated, water pushes against the foundation.
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If the pressure builds enough, it can force water through walls or the floor.
6. Window Well Leaks
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Basement windows that are below grade are especially vulnerable.
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If the window wells aren’t properly drained, they can fill with water and leak into the basement.
7. Old or Damaged Drain Tile System
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Older homes may have failing or nonexistent drain tile systems.
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If water isn’t directed away from the foundation effectively, it can pool and eventually find its way in.
8. Sump Pump Failure or Absence
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Many homes in the area rely on sump pumps to handle groundwater.
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A failed or undersized pump can result in water backing up into the basement.
If you’re dealing with a leak, it’s helpful to look at when and where it happens—during rainstorms, spring thaw, or consistently damp spots—and that can give clues to the root cause.
Brewer Contracting has been waterproofing homes in SE Wisconsin since 1953.
Ken Brewer personally has 35 years experience in all aspects of commercial and residential waterproofing.
Whether it is a issue with the inside or outside of your home, we can provide a free assessment of your particular issue.  Many big national companies will come in and over sell your needs.  Brewer Contracting will be sure to evaluate your water issue with honesty and integrity. Give us a call