Leak Detection & Slab Leaks in Newark & the East Bay

A hidden leak is water going somewhere it should not, behind a wall, under a floor slab, or in a buried supply or sewer line, where you cannot see it. The job of leak detection is to find the exact spot before anyone opens up drywall, tile, or concrete. We treat finding the leak and fixing it as two separate steps, because guessing wrong means tearing out more of your home than the repair ever required.

Most of the homes we work on across the East Bay sit on a concrete slab, so the supply lines run through or under that slab. When one of those lines fails, the water has nowhere obvious to go, and the only clues are indirect: a higher bill, a warm patch on the floor, or the faint sound of water moving when every fixture is off. We start with those clues and narrow down from there.

We work from the outside in. First we confirm there is actually a leak and roughly where it lives, then we pinpoint it. We listen for the leak with acoustic equipment, check for moisture and temperature differences, and isolate sections of the plumbing so we can tell a supply leak from a drain issue and a slab leak from a wall leak.

We also isolate the system and watch whether it holds, which tells us whether the leak is on the pressurized supply side or somewhere else entirely. The point of all of this is to mark one spot, not a whole room. When we are done locating, you should know what is leaking, where, and what it will take to fix, before any cutting starts.

Slab leaks happen when a line running under the concrete foundation springs a leak. Because the East Bay housing stock leans heavily toward homes built in the 1950s through the 1970s, a lot of those original supply lines are galvanized steel that has been corroding from the inside for decades, and the moderately hard water in the Tri-City area does not help. Wall leaks tend to show up as stains, soft drywall, or a musty smell. Underground leaks between the meter and the house often show as a wet spot in the yard or a bill that climbed for no reason.

Not every wet spot is a slab leak. Sometimes it is a leaking fixture, a failed wax ring under a toilet, condensation, or roof and grading water finding its way in. Part of our job is ruling those out so you are not paying to open a slab over a problem that lives above it.

Once we have the leak located, there are usually two honest options. A spot repair opens the slab or wall at the one failure point and repairs that section. It is the smaller, less disruptive job, and it is the right call when the rest of the line still has life in it. A reroute abandons the failed run and routes a new line through the wall or attic instead, which avoids breaking concrete and makes sense when the existing pipe is old enough that fixing one pinhole just means another one shows up nearby in a year.

We will tell you plainly which one we think fits your situation and why. If you have galvanized lines from the original build and they are failing in more than one place, we will say so rather than sell you a string of spot repairs. If it is a single isolated failure in otherwise sound pipe, we will not push a reroute you do not need.

Call us when the signs point inside the house: a sudden bill jump with no change in usage, a warm spot on the floor, running water you can hear with everything shut off, or pressure that has dropped across the whole home. The sooner a slab or wall leak is found, the less water damage and mold you are dealing with later.

One honest exception: the water line from the street to your meter belongs to the water utility, and the meter is theirs too. If the wet ground or the suspected leak is on the street side of the meter, that is a call to the Alameda County Water District, not to us, and they handle it at no cost to you. We are responsible for everything from the meter into and under your home. We are licensed, family-owned since 1994, and available 24/7 when a leak cannot wait.