Hydrostatic pressure around Findlay
soil drainage is rated Somewhat poorly drained, so water collects against the outside of the wall and presses in at the joint between the wall and the floor; 39% clay, which drains slowly, so the pressure outside the wall stays up long after the rain.
soil drainage is rated Somewhat poorly drained, so water collects against the outside of the wall and presses in at the joint between the wall and the floor
39% clay, which drains slowly, so the pressure outside the wall stays up long after the rain
The soil sampled around Findlay is classed as somewhat poorly drained, which is the single best predictor of whether water sits against a foundation wall after rain.
Why this loads the wall
A basement wall is holding back soil, and soil that cannot drain holds water. Saturated ground behaves like a liquid against the wall, and the pressure rises with the height of the water table, not with how hard it rained.
Findlay records about 8 days a year below minus 12 Celsius, and frozen soil expands sideways against a basement wall rather than downward.
What to do before spending anything
- Extend every downspout at least six feet from the wall - this alone fixes a meaningful share of wet basements
- Check the grade falls away from the house for the first ten feet
- Photograph and date where the water appears, and note whether it follows rain
- Look at the height of the stain: at the floor joint, or higher up the wall
At roughly 39 percent clay, the ground around Findlay drains slowly, so the water pressure against the wall lasts well past the end of the storm.
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