Exterior & Below-Grade Waterproofing in Rock County
What exterior waterproofing involves
Exterior and below-grade waterproofing stops water at the foundation wall before it reaches your basement. A crew digs down to the footing, cleans and repairs the wall, then applies a membrane or coating. Most jobs also add drainage: new footing drain tile, a drainage board against the wall, and clean stone backfill. Grading and downspout extensions are often part of the fix.
What to look for
- A written scope that names the product, the depth of excavation, and how drain tile ties into a sump or daylight discharge.
- A diagnosis of the cause (cracks, hydrostatic pressure, window wells, gutters) rather than a one-size quote.
- Proof of license and insurance, plus a transferable warranty that states what it covers.
- A plan for protecting landscaping, utilities, and decks during excavation.
How our scoring helps
We list 4 Edgerton businesses in this category and score them on public review evidence and service detail. You can see the ranking in our ranked guide to Edgerton waterproofing contractors, and the full scoring rules are on the methodology page. Use the scores to build a shortlist, then get at least two written quotes.
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All exterior & below-grade waterproofing, ranked by score and relevance
19 businesses. The order weighs each business's overall score by how much of its reviewed work is exterior & below-grade waterproofing, so a lower-scored specialist can rank above a higher-scored generalist. Filter and sort below, or open the full map view.
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Call a Waterproofing ProviderCommon questions about exterior & below-grade waterproofing
- How much does exterior waterproofing cost?
- Full exterior excavation commonly runs from about $60 to $150 per linear foot, so a typical house often lands between $8,000 and $25,000 or more. Depth, access, hardscape removal, and drain tile all move the price. Spot repairs on one wall cost much less.
- How often does a foundation need waterproofing?
- A properly done exterior membrane and drain system can last 20 to 30 years or more. Sprayed coatings alone (damp-proofing) tend to fail sooner. Redo it when you see recurring seepage, efflorescence, or damp walls, and after confirming gutters and grading are not the cause.
- What should I expect during the job?
- Expect excavation along the affected walls, noise, and a trench open for several days. Most single-home jobs take about one to two weeks, weather permitting. The crew repairs cracks, applies the membrane, installs drainage, backfills, and regrades.
- How can I tell if a contractor is good?
- Ask for a detailed written scope, license and insurance proof, local references, and a clear warranty in writing. Be cautious of quotes that skip diagnosis or push the same fix for every home.
Guides to choosing exterior & below-grade waterproofing
- Interior vs. exterior basement waterproofing: how to choose
Interior drain tile or exterior excavation? A plain comparison of what each method actually fixes, what it costs, and which situations call for which.
- Getting your basement ready for spring thaw in Rock County
A seasonal checklist for Rock County homeowners to reduce spring snowmelt and heavy-rain basement flooding before it happens.