Serving Concord
Groundwater & Basement Water Intrusion in Concord, CA
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
Why does the first big storm of the season cause more trouble than the ones after it?
Expansive clay is the reason. Through a dry summer it shrinks and opens fissures that run well below the surface. The first atmospheric river pours into those cracks and reaches footing depth before the soil has swelled shut. A week later the same clay is closed and sheds water across the surface instead. That is why a house can flood in November and stay dry through a wetter January.
We have a raised floor and a crawl space. How wet is too wet under there?
Standing water is always too wet, and so is soil that stays dark and cool into the spring. A crawl space here should dry out between storms. If it does not, the yard is delivering more water than the vents can remove, and joists and subfloor start taking moisture from below. Meter the framing rather than judging by eye, and treat a crawl that never dries as a drainage problem rather than a ventilation one.
Our water bill jumped but nothing is wet. Could that still be a leak?
On a slab, very likely. A break in a pressurized line under the slab loses water into the subgrade for weeks before anything reaches the surface, and on clay it may never surface at all. A warm patch on the floor points at a hot line. The usual sequence is a pressure test to confirm the loss, then a leak locate before any concrete is opened, so the repair is one hole rather than several.
Open the Concord FAQ beside the housing and climate notes.