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Storm Runoff and Crawl Space Risk Check for Castro Valley, CA

Hillside runoff, creek-side lots and older plumbing put Castro Valley crawl spaces at risk every rainy season. Check the items that match your home to see how exposed it is.

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Check everything that applies The lot sits below a slope, a street or a neighbor's yard that drains toward the house The home backs onto a creek, a culvert or a drainage channel Downspouts empty next to the foundation instead of into a pipe or away from the house Foundation vents or crawl space access openings sit at or near the soil line The crawl space has had standing water or wet soil after a storm before The home still has original galvanized supply pipe The sewer lateral is original to a 1950s to 1970s house Soil, mulch or paving slopes toward the walls on any side

Your storm water exposure

Low

Check the boxes that match your home.

This is a screening check for Castro Valley homes, not an inspection.

(888) 774-9605Castro Valley storm water questions

Why storm water finds Castro Valley homes

Storm runoff and crawl space risk in Castro Valley, CA

Hills and clay soil

Castro Valley sits in a valley ringed by hills. In a long storm the clay soil saturates and runoff moves downhill toward foundations and into crawl spaces.

Creek-side lots

Castro Valley Creek, Chabot Creek, Crow Creek and Cull Creek rise fast in an atmospheric river, and lots beside them see overflow and backed-up drains.

Postwar plumbing

Homes from the 1950s to 1970s often keep galvanized supply pipe and original sewer laterals, which add leak and backup risk on top of the weather.

Already wet? See crawl space water damage, storm water damage and creek and flash flood cleanup in Castro Valley.

Why does my crawl space get wet with no broken pipe?

Saturated soil and runoff from uphill push water through foundation vents, access openings and the soil under the house. It collects on the vapor barrier or the bare soil.

What is the cheapest step to lower the risk?

Moving downspout discharge well away from the foundation and keeping soil sloped away from the walls do a lot for very little money.

When should a crawl space be checked?

After the first big storm of the season and after any atmospheric river. A flashlight look for standing water or wet insulation takes a few minutes.

Does standing water under the house matter if the floors feel dry?

Yes. It keeps the crawl space humid, soaks insulation and slowly wets joists and subfloor. It also invites wood decay.

Why does the sewer lateral matter?

Older clay and cast iron laterals crack and take in roots. In a hard storm, water and sewage can back up into the lowest fixture in the house.

Does every home near a creek flood?

No. Lot height, drainage and the condition of the foundation matter as much as location. This check scores the factors you can see and change.

24/7 emergency dispatch

Water under the house? Get it pumped out.

Water that sits under the floor soaks insulation and joists. Extraction and drying stop the damage from spreading.

(888) 774-9605Castro Valley crawl space help

Castro Valley Water Damage Restoration · Castro Valley, CA

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