Bothell homes often face groundwater intrusion and seasonal rain moisture. Wet Basement Services provides permanent waterproofing, drainage, crawl space, and mold remediation solutions tailored for Bothell properties.
1. Geology and Soil Conditions
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The Bothell area lies within the Puget Sound Lowland and is largely underlain by glacial deposits from the last ice age. According to a geotechnical report for a site in Bothell: “Most of northwestern King County is mantled by glacial deposits (including gravel, sand, silt, clay, boulders) …” Bothell WA
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Soil‑series data for nearby indicate soils such as the Alderwood series—described as “very gravelly sandy loam … and dense glacial till that breaks to very gravelly sandy loam …” with a “dense glacial till” layer beneath. Soil Series
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In summary: the soils often include a mix of sand/gravelly materials overlaying or intermingled with denser till, silty/clay layers, or “hardpan” type zones which impede drainage. For example: “Glacial till … often results in … a dense, compacted layer … at an average depth of 24‑36 inches … This hardpan … can form a perched water table.” Docslib
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Implication: Basements in Bothell often sit adjacent to soils with limited downward drainage capacity, and when water infiltrates it may get trapped or migrate laterally toward the foundation rather than dissipating quickly.
2. Rainfall and Seasonal Moisture Load
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Bothell has a large number of rainy days. One source states: “In Bothell, during the entire year, the rain falls for 166.9 days.” Weather Atlas+2Weather U.S.+2
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Average monthly rainfall: January ~2.87″, February ~2.28″, March ~2.17″, April ~1.89″, etc. Weather U.S.+1 Another source lists total annual rainfall at about 41 inches. BestPlaces
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Implication: Frequent rain and many wet days mean soil around foundations remains moist or saturated for extended periods. Combined with slow‑draining soils (see above) the risk for basement water intrusion increases.
3. Topography and Drainage Characteristics
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Bothell’s terrain is described as within the structural lowland (Puget Sound Lowland) including “gently rolling glacial drift plains covered with small ridges, hills, and depressions” in the local geotech report. Bothell WA
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With small ridges, hills and depressions, many lots in Bothell may be on sloped ground, near lower‑lying areas or have higher terrain upslope. Water runoff from upslope areas could flow toward foundations if not managed.
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Additionally, when fill or disturbed material is present (as found in one report for a Bothell site: existing fill with silty sand entrained with debris) the natural drainage can be further degraded. Bothell WA
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Implication: On a lot in Bothell that slopes toward the home, or where water collects in depressions, you have a higher tendency for surface or subsurface water to move toward basement walls. Without appropriate drainage, this accelerates risk.
4. Combined Effect: Why Basement Risk Is Elevated in Bothell
Putting the factors together:
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Basements in Bothell are adjacent to soils that may not drain quickly (dense till, silty layers, fill, etc).
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Frequent rainfall and many wet days saturate soils and keep them near capacity.
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Terrain and lot conditions may channel surface/subsurface water toward home foundations (especially if grade is unfavorable or fill/landscape changes modify drainage).
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Result: increased hydrostatic pressure on foundation walls, potential lateral water migration under slabs or through walls, longer periods of moisture exposure — all raising the risk of basement seepage, damp walls/floors, or flooding.
Bothell basements often experience seepage through foundation walls and floors. We install:
- Interior French drains
- Vertical drain wall membrane
- Sump pumps and battery backups
- Exterior drainage solutions
Bothell homes typically deal with:
- Water seepage during heavy rain
- Standing water from seepage in cold joints
- Damp walls and floors
- Musty odors
- Mold growth on wooden framing
✔ Local Bothell waterproofing specialists
✔ Long-lasting solutions and warranties
✔ Certified mold remediation experts
✔ Quick response for emergency leaks
Serving all neighborhoods in Bothell, WA
Request a free waterproofing estimate today.