Serving Seattle
Groundwater & Basement Water Intrusion in Seattle, WA
Basement seepage, failed sumps, and hydrostatic pressure against the foundation are extracted and dried, and the path from the ground is identified so the loss does not repeat. Groundwater and basement seepage are extracted and dried only after the path from the soil is identified — a wall, a slab, a drain, or a failed sump. Drying the interior without stopping that path returns the same water to the same floor.
Frequently asked questions
There is no storm, just weeks of drizzle. Why is the daylight basement taking water?
Duration, not a burst. Weeks of light rain keep the uphill bank saturated, so the buried wall of a daylight basement is holding groundwater, not shedding a single cell. The first sign is usually damp at the base rather than a visible flow. Perimeter drainage at the cut and a working sump manage that bank; waiting for a named storm to explain the wet wall will miss the season that never stops.
Is a daylight basement on a Seattle hillside a groundwater job or a roof job?
Often both, and they look alike on the floor. The cut face takes uphill groundwater all season; moss-packed gutters and a roof seam that never dries add a second path from above. A moisture map tells which wall is feeding the room. Extraction still starts with standing water; the lasting split is whether the fix is a drain at the buried wall or a cleared gutter and a dried roof cavity.
The gutters are full of moss. Does that actually put standing water in the house?
Yes, once they overflow at the eaves. A packed gutter turns the roof edge into a waterfall a few inches from the siding, and on a slope that sheet runs to the downhill wall or back toward the cut. Wood-frame assemblies here do not get a dry week to recover. Clear the debris and carry the downspout past the wall; a ceiling stain after a quiet November is often that overflow, not a failed shingle in the field.
The same questions, in context, on the Seattle mold removal page.