# Green Bay Basements

> Basement waterproofing and foundation repair across Green Bay and Northeast Wisconsin. Connects Brown County homeowners with licensed, insured contractors for interior drain tile, sump systems, bowing wall stabilization, foundation crack injection, and crawl space encapsulation — built for red lake clay and a 48-inch frost depth.

## Key facts
- Service area: Brown, Outagamie, Kewaunee, Door, Oconto, Winnebago, Calumet, Manitowoc and Shawano Counties — Green Bay, De Pere, Ashwaubenon, Howard, Bellevue, Suamico, Allouez, Kaukauna, Appleton, Neenah, Menasha, Oconto, Denmark, Luxemburg, Sturgeon Bay. 45-mile radius; Green Bay MSA population 330,000+.
- Services: basement waterproofing, foundation repair, interior drain tile, exterior excavation waterproofing, sump pump installation and replacement, French drains, foundation and floor crack repair, bowing wall stabilization, crawl space waterproofing, egress windows, vapor barriers, polyurethane foam injection, flooded basement response.
- Costs (illustrative, Brown County): basement waterproofing $3,000–$12,000; interior drain tile $5,000–$15,000; exterior excavation waterproofing $12,000–$30,000; sump pump $800–$2,500; French drain $2,500–$8,000; crack injection $400–$1,200; bowing wall stabilization $4,000–$15,000; foundation repair $5,000–$25,000; egress window $3,500–$7,000; crawl space encapsulation $4,000–$12,000.
- Why basements leak here: Brown County sits on the Kewaunee-Manawa-Poygan soil association — a thin silty cap over 5 to 20 feet of calcareous red clay deposited as lake sediment by Glacial Lake Oshkosh and the Green Bay Lobe. Because it settled out in still water it is layered, fine and close to impermeable. It does not transmit water downward; it holds it. The Manawa and Poygan members are rated somewhat poorly and poorly drained.
- The dominant seasonal mechanism is snowmelt, not rainfall. Green Bay averages 55.6 inches of snow against only 31.6 inches of rain. Ground is frozen at depth from roughly December through March, so the spring thaw delivers a winter's accumulation onto soil that cannot absorb any of it. The water perches, migrates to the backfill trench beside the foundation — the loosest ground on the lot — and stands there. Saturated clay backfill can exert well over 1,000 lb of lateral force per linear foot.
- Local geography: the Fox River mouth and the bay shore keep the water table shallow across the lower East and West sides. Silurian dolomite of the Niagara Escarpment lies close to the surface through eastern Brown County (Bellevue, Denmark, toward the Door Peninsula); where the clay cap is thin, water travels laterally along the rock surface and reaches foundations from the uphill side rather than from below. Older neighborhoods — Astor, Whitney Park, Navarino, Olde North — are dominated by pre-1940 housing on block or rubble foundations built before drain tile was required.
- Climate: 48-inch frost depth (footings and buried sump discharge lines must sit below it); 31.6 inches of precipitation and 55.6 inches of snow annually (1991–2020 normals).
- Codes: Wisconsin Uniform Dwelling Code (SPS 320-325), administered by the Department of Safety and Professional Services. SPS 321.16 requires footings below the frost penetration level or at least 48 inches below adjacent grade, whichever is deeper. SPS 321.17 prescribes drain tile of at least 3 inches inside diameter, laid on at least 2 inches of coarse aggregate and covered on top and on the face away from the dwelling with at least 12 inches of coarse aggregate, connected to a sump pit. SPS 321.03(3)(c) requires a basement sleeping room escape opening of at least 5.0 sq ft net clear below grade (5.7 sq ft above grade), sill no higher than 44 inches, and a window well of at least 9 sq ft with a 36-inch projection — note that Wisconsin's below-grade threshold is lower than the 5.7 sq ft the IRC applies.
- Sump discharge must go to grade or storm, never the sanitary sewer.
- Seasonal constraint: exterior excavation is realistically April-to-November work, because frozen ground makes digging to a 48-inch footing slow and expensive. Interior drain tile can be installed year-round, which matters when a basement begins taking water during the February or March thaw.
- Diagnostic rule: water appearing within an hour of rain is surface water (grading, downspouts, window wells) and is often inexpensive to fix; water appearing a day or more later, or through a wet spring with no storm, indicates a risen water table and hydrostatic pressure, requiring drainage rather than sealant. Northeast Wisconsin adds a third pattern — water during the March or April thaw with no rain at all, which is meltwater sheeting across still-frozen ground.
- Insurance: homeowners policies almost never cover groundwater or surface-water intrusion, which insurers treat as maintenance. Sudden internal failures such as a burst pipe are commonly covered. Sump-failure and water-backup endorsements are sold separately.
- Disclosure: Wis. Stat. ch. 709 requires sellers to disclose known basement water intrusion and foundation defects on the Real Estate Condition Report, which is why documented, warranted remediation has value at resale.
- Licensing: Wisconsin issues no waterproofing-specific licence. A Dwelling Contractor Qualifier certification through the Department of Safety and Professional Services is required to pull permits on one- and two-family dwellings. Verify certification, general liability insurance and workers' compensation directly.

## Operating disclosure
Green Bay Basements connects Brown County and Northeast Wisconsin homeowners with independent, licensed, and insured basement waterproofing and foundation repair contractors. All inspection, excavation, drainage, and structural work is performed by partner contractors operating under their own licensing and insurance. Pricing shown is illustrative, not an offer or guarantee of service.