Signs of a slab leak

Every sign on this list has an everyday explanation that fits just as well as a slab leak does. What separates a real leak from a false alarm is usually one extra detail sitting right next to the first sign, a fact the innocent explanation can’t quite cover.

A bill that stays up

Water bills move around for plenty of reasons that have nothing to do with a slab. A new sprinkler zone, houseguests, a pool topped off after a hot week, all of that shows up as a higher bill and goes away again once the reason does. What doesn’t fit that pattern is a bill that stays elevated for a second billing cycle straight, with no new water use anyone in the house can point to. That’s the detail worth acting on.

A warm patch under bare feet

Feet find this one before eyes do. A patch of tile or vinyl that’s noticeably warmer than the floor around it can just mean afternoon sun through a window, heating that spot of slab all day. The difference is timing. Sun warms a floor by mid-afternoon and cools it by night. A warm patch that’s still warm after dark, or shows up in a room with no direct sun at all, points at a hot-water line running underneath instead.

A sound after everything’s off

Late at night, with every faucet, appliance, and sprinkler zone confirmed off, is the best time to catch this sign. Houses make plenty of noise on their own: a water heater cycling, a pressure tank kicking on, pipes settling as the temperature drops. Those sounds are short and they stop. A steady hiss or trickle that keeps going for a full minute or more, with nothing in the house actually using water, is a different kind of sound entirely.

A crack that doesn’t behave

Ordinary foundation settling shows up as thin, straight cracks, usually near a door frame or a window corner, and they stay roughly the same size for years once a house has settled in. A crack that widens over a matter of weeks, or that sits next to a baseboard that’s staying damp for no obvious reason, isn’t behaving like a settling crack anymore. That combination is worth a closer look.

Pressure that drops mid-shower

You’re standing under a shower that started strong and the pressure fades partway through, with nobody else in the house running water. A single drop like that can just mean a municipal supply fluctuation, or a neighbor’s irrigation kicking on at the same time. What points elsewhere is a pressure drop that keeps happening at the same fixture, on different days, paired with a bill that’s climbing or a spot on the floor that’s warmer than it should be.

Why the water bill matters here specifically

Irving keeps a standing program for concealed leaks like these, and a documented bill spike is part of what makes it work. Once a plumber confirms the leak, the slab leak water damage page takes stock of what filing for that adjustment actually looks like, along with everything else the leak left behind. Keeping notes on when the bill jumped and the notice-and-documentation habits that the water damage insurance claim guide bookends from first report to final payment both start with the same habit: write it down as it happens, not after.

Two alibis don’t hold at once

Any single sign here can be explained away, and most of the time, it should be. A warm patch, a stray sound, a slightly higher bill: none of those alone is proof. What changes the picture is a second sign showing up at the same time, because two innocent explanations rarely line up together by accident.