Common questions about basement waterproofing
- What method of basement waterproofing is more effective long term, a French drain or a sump pump drainage system?
- What steps would you take to waterproof your basement,
- What works better for rainwater seeping into my basement, an interior or exterior French drain?
- What’s the best way to handle wet basement repair?
- What’s the cheapest way to put a drain in a basement?
- Which type of chemical cleaner can be used for the removal of basement mold and efflorescence?
- Why are basements usually damp?
- Why are there holes in my basement wall?
- Why does condensation collect at ground level on my basement walls, and how do I stop it?
- Why does it take so long for our sump pump to turn on when we get heavy rain?
- Can I put topsoil sloped up right next to a house’s
- Can you use Flex Seal on basement walls?
Wells basement waterproofing — local context
Wells sits on three coastal river watersheds that drain to salt-marsh estuaries — the Webhannet, the Little River (Merriland River / Branch Brook), and the Ogunquit — all running to the Gulf of Maine (Wells Reserve at Laudholm). The Webhannet watershed lies entirely inside Wells, roughly 14 square miles draining through a large salt marsh to Wells Harbor (Wells Reserve). That low, tidal land is wet by nature: the Wells Reserve protects 2,250 acres of salt marsh, wetlands, and beach-and-dune that formed behind barrier spits over 3,000–4,000 years. Underneath, southern Maine's coastal lowlands sit on the Presumpscot Formation — glaciomarine marine clay that drains slowly and holds water against foundations (Maine Geological Survey). The Town of Wells maintains FEMA Flood Insurance Rate Maps for these coastal hazard areas. So we waterproof from the inside: 603 installs the Forever Dry System — a full-perimeter interior drain, a sump pump per 120 feet, a wall vapor barrier, and a dehumidifier — not exterior excavation, which Nik considers a poor 2–3 year fix. Basement waterproofing runs $3,000–$30,000. See sump pump & drainage maintenance.
What a recent customer said
"With the crazy wet weather and super high water table this year. Had water just seeping in through the Wall/Floor Joint in basement, that would just NOT stop. Have not had this type of issues in the 30+ years at our house… But was leaking in at several points along a 30ft wall. 603 Basement was just a bit more. BUT they put in their patented Channel solution along the entire base of the wall, along with Sump Pump And let me tell you. . IT really worked. Also the Sump Pump they quoted was 1/2HP and much larger… Also came with External 12volt back up battery for when power goes out… Would HIGHLY!! recommend 603 Basement Solutions."
— John Weber, Google review
Frequently asked questions
Why do Wells basements flood when the water table is high?
Wells is a coastal, tidal town. The Webhannet River watershed sits entirely inside Wells — about 14 square miles draining through a large salt-marsh estuary to Wells Harbor (Wells Reserve at Laudholm). Low land near those marshes means shallow groundwater and slow drainage, so the water table sits high against basement walls and floors after heavy rain or coastal storms.
Does soil in Wells make wet basements worse?
Yes. Southern Maine's coastal lowlands are blanketed by the Presumpscot Formation — glaciomarine silt and clay (marine clay) deposited when the sea flooded the land after the glaciers retreated (Maine Geological Survey). Fine marine clay drains slowly and holds water against foundations, a real driver of high water tables and wet basements across coastal York County, including Wells.
Is my Wells property in a flood hazard area?
The Town of Wells maintains FEMA Flood Insurance Rate Maps (FIRMs), and low-lying areas near the Webhannet and Little River marshes and Wells Harbor fall in mapped coastal Special Flood Hazard Areas. The town tracks FEMA preliminary FIRM changes and 2024 Letters of Map Revision. Check your parcel-level zone on the town's FEMA Information page and the FEMA Flood Map Service Center.



