Crawl Space Waterproofing in De Pere, Wisconsin
11 of the 26 crawl space companies serving De Pere, Wisconsin specifically list waterproofing among their services, led by Superior Waterproofing (5.0★, 81 reviews). Local waterproofing typically runs $1,500–$5,000.
Get drainage and sump pump quotes from De Pere pros who handle wet crawl spaces. 11 local pros offer waterproofing services. For full service comparisons, see all crawl space contractors in De Pere or encapsulation pros in De Pere.
De Pere Waterproofing Cost — Midwest — Flash Flooding + Clay Soil
Annual precipitation: 30–50 inches; concentrated in spring and summer storms.
Cost varies with crawl space perimeter, sump pump capacity, discharge length, and exterior grading work. Get 2–3 quotes for an exact number.
Why Waterproofing Matters in De Pere
Midwest waterproofing has to handle two distinct events: spring flash floods that drop 2–4 inches in an hour and clay soils that expand seasonally, holding water against foundations like a slow-release sponge. Tornado and severe-storm damage adds an emergency dimension — interior drainage that survives without power is critical. Pair with radon mitigation if levels are elevated (most of the Midwest is in EPA Zone 1).
What a De Pere Waterproofing System Should Include
- ✓Interior perimeter drain (1.5–2 inch radius)
- ✓Sump pump with battery backup (severe-storm power loss)
- ✓Discharge line with check valve
- ✓Vapor barrier and radon-rated barrier seams if Zone 1
- ✓Exterior French drain only if soil permits (heavy clay limits effectiveness)
- ✓Reinforced barrier in tornado-prone counties
Interior vs Exterior Drainage in Wisconsin
Recommendation
Interior is mandatory in clay soils. Exterior French drains can clog or crush in expansive clay within 5–10 years. Budget for interior-first systems and treat exterior grading as a complement, not a primary defense.
Sump Pump Sizing
A 1/3 to 1/2 HP pump with battery backup is standard. Severe weather brings 6–24 hour power outages multiple times per year — battery backup is non-negotiable. Consider a water-powered backup pump in flood-prone areas.
What to Watch For in Wisconsin
- !Test radon BEFORE waterproofing — bundle systems if levels are elevated
- !Demand battery backup on sump pump given severe-storm power loss patterns
- !In tornado country, route discharge lines underground rather than on exterior walls
Waterproofing Contractors in De Pere
Sommerfeld Basement Contractors
2060 Cottonwood Ct, De Pere, WI 54115, USA
1 reviews
Superior Waterproofing
1120 N Maple St, Cleveland, WI 53015, USA
81 reviews
Andersen Basement Repair Inc
3820 W Mason St, Hobart, WI 54155, USA
5 reviews
Pouwels Basement Specialists LLC
4298 Pouwels Ct, De Pere, WI 54115, USA
29 reviews
Northeast Wisconsin Waterproofing, LLC
3138 Knights Ln, Green Bay, WI 54313, USA
17 reviews
Everdry Waterproofing Fox Cities
3800 N Providence Ave Suite A, Appleton, WI 54913, USA
703 reviews
Basement Repair Specialists LLC
1400 S Van Dyke Rd, Appleton, WI 54914, USA
326 reviews
Titletown Basements
1631 Brookfield Ave Suite B2, Green Bay, WI 54313, USA
49 reviews
Green Bay Mold Removal Experts
674 Sunset Cir, Green Bay, WI 54301, USA
7 reviews
Action Concrete Contractors Green Bay
130 E Walnut St Suite 409, Green Bay, WI 54301, USA
43 reviews
NorthStar Restoration Services Green Bay
101 N Military Ave ste 115, Green Bay, WI 54303, USA
6 reviews
Flood Pros USA
1488 Mid Valley Dr Suite B, De Pere, WI 54115, USA
15 reviews
Acculevel
118 S Adams St Suite 310, Green Bay, WI 54301, USA
12 reviews
Lakeshore Restoration LLC
1620 22nd St, Two Rivers, WI 54241, USA
196 reviews
Acculevel
100 W College Ave Suite 303, Appleton, WI 54911, USA
13 reviews
CCS Property Services, LLC
1048 Glory Rd, Ashwaubenon, WI 54304, USA
102 reviews
L.A.D.S (Life After Disaster Strikes)
2250 S Overland Rd, De Pere, WI 54115, USA
49 reviews
SERVPRO of Brown County
516 N Eighth St, De Pere, WI 54115, USA
107 reviews
Midwest Restoration
N2311 W 41 Frontage Rd, Kaukauna, WI 54130, USA
262 reviews
Sure-Dry, LLC
754 W Airport Rd, Menasha, WI 54952, USA
1526 reviews
Elite Restoration of Green Bay, WI
941 Ashwaubenon St, Green Bay, WI 54304, USA
16 reviews
ABT Foundation Solutions, Inc.
8718 WI-76, Neenah, WI 54956, USA
287 reviews
PuroClean of Green Bay
1364 Reber St, Green Bay, WI 54302, USA
73 reviews
Waterproofing FAQs — De Pere, Wisconsin
Which companies offer crawl space waterproofing in De Pere?
Sommerfeld Basement Contractors (5.0★), Superior Waterproofing (5.0★), Andersen Basement Repair Inc (5.0★) list waterproofing in De Pere. 11 of 26 local crawl space companies tag this service directly.
How many crawl space contractors serve De Pere?
26 crawl space companies are listed for De Pere; Superior Waterproofing is the highest-rated at 5.0★ (81 reviews). Pros in nearby Milwaukee and Madison also cover the area.
How much does crawl space waterproofing cost in De Pere, Wisconsin?
Crawl space waterproofing in De Pere, Wisconsin typically costs $1,500–$5,000 for a complete interior drainage system with sump pump. Midwest — Flash Flooding + Clay Soil pricing reflects local labor rates and the specific drainage scope each climate demands.
Do I need an interior or exterior drainage system in De Pere?
Interior is mandatory in clay soils. Exterior French drains can clog or crush in expansive clay within 5–10 years. Budget for interior-first systems and treat exterior grading as a complement, not a primary defense.
What size sump pump do I need in De Pere?
A 1/3 to 1/2 HP pump with battery backup is standard. Severe weather brings 6–24 hour power outages multiple times per year — battery backup is non-negotiable. Consider a water-powered backup pump in flood-prone areas.
Why is exterior grading important for waterproofing in Wisconsin?
6-inch fall over 10 feet, plus extended downspouts (8+ feet). Clay soils heave seasonally — re-check grade every 2–3 years and re-grade as needed. Consider adding a swale to redirect heavy runoff.
When should I schedule waterproofing in De Pere?
Late summer through fall (August–October). Avoid spring — flooding makes crawl space access unsafe and wet substrate prevents proper installation. Winter access is difficult in heavy snow regions.
Expected ROI
Avoiding one basement/crawl space flood event during a flash flood ($10K–$30K typical Midwest claim) covers the system multiple times over. Factor in radon mitigation savings if you bundle (saves $500–$1,200 vs separate jobs).
Best Season to Schedule
Late summer through fall (August–October). Avoid spring — flooding makes crawl space access unsafe and wet substrate prevents proper installation. Winter access is difficult in heavy snow regions.
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Waterproofing Guides
Midwest — Flash Flooding + Clay Soil
Annual precipitation: 30–50 inches; concentrated in spring and summer storms