Houston
Slab Leak Repair and Replacement in Houston, TX
Need slab leak repair or replacement in Houston? Houston is built on flat, heavy clay with water close to the surface, and nearly every house is on a slab. We connect you with a local crew that locates the leak before any floor is opened.
Answered 24 hours a day, every day.
Gumbo clay and a high water table
Houston sits on a flat coastal plain, and much of it is a dense clay people call gumbo. It swells noticeably when wet and shrinks and cracks when dry. In many neighborhoods the water table is not far below the surface, so the ground stays damp for much of the year and dries unevenly in the summer.
Slabs here are built for that movement, often with stiffening beams, but they still shift. Lines beneath them feel it as repeated small stresses at bends, at tees and where a pipe passes through a footing. Copper is stiff, and over many years that movement can wear the outside of the pipe until a pinhole opens.
A high water table does not cause a leak. It can make a slow one harder to notice, because the soil around the slab is already damp. None of this is a finding about a particular house, and foundation questions belong to a foundation contractor.
What different eras of Houston homes usually have under the floor
Houston grew in rings. The oldest neighborhoods inside the central loop have houses from the 1900s to the 1940s, mostly raised on piers. Postwar growth brought slab ranches to every side of the city through the 1950s and 1960s, and the 1970s and 1980s filled in the west, southwest and north. Master-planned communities in the 1990s and since have used PEX.
Copper under the slab is common in houses from the 1950s through the 1980s. Some built from the late 1970s to the mid-1990s may have polybutylene instead. A technician confirms what a particular house has, and neighbors on one street can differ.
Tell us how much it changed.
How copper wears under a slab
Under a slab, copper is surrounded by concrete, sand or gravel and moist soil. Where a line rubs against a hard edge as the slab shifts, the wall can thin. The hot side tends to go first because heat adds expansion and contraction on top of ground movement. A warm spot on the floor, a rising bill and a water heater that runs more than usual are the usual first signs. See hot-water slab leaks and copper pipe leaks under the slab.
Homes from the polybutylene era
Subdivisions built from the late 1970s through the mid-1990s may have a gray or blue plastic supply line called polybutylene. Where it is present, leaks tend to occur at fittings rather than along the pipe, which changes how the leak is located. In a house with more than one leak, repiping often becomes part of the conversation. See polybutylene-era homes.
Describe the signs you have seen.
Pier-and-beam houses
Inside the loop, many older houses sit on piers with an open crawlspace. A raised house has no slab under the main floor, so a supply leak is in the crawlspace and is usually reachable from below. Additions built on concrete, such as a kitchen or a garage conversion, can have a slab leak. Tell the technician which parts of the house are raised.
How a Houston leak is located
The technician isolates the hot and cold sides, pressure tests the suspect line and listens along the floor with acoustic equipment. Thermal imaging can show a warm path under tile or wood. These steps narrow the location before any opening is made. They do not always give an exact point. See how slab leaks are found.
A local crew explains what happens next.
What happens once the leak is found
A technician may present spot repair through the slab, rerouting a line above it, pipe lining where recommended, or repiping when lines keep failing. What steers the choice is where the leak is, how many have occurred, what the line is made of and what sits above it. No option is always best. Drying is handled by restoration companies and floors by flooring contractors. See slab leak repair and replacement.
Your first move
With all fixtures and appliances off, keep an eye on the meter for a few minutes. If it moves, water is escaping somewhere on the Houston property. See water meter leak check. If water is surfacing, shut off the main if you can reach it safely, keep people and pets away, move valuables and call. Stay clear of outlets and appliances near standing water. If anyone smells gas, leave and call the gas utility and emergency services from outside. A Harris County crew can tell you how long the visit is likely to take.
We connect you with a crew near you.
Is it a slab leak?
What tends to show first
- SIGN 01
Warm spot on the floor
In Houston, a patch that stays warm in shade and with the heating off can follow a hot-water line. Most 1960s-80s houses in Harris County can be tested without moving furniture far.
- SIGN 02
Water bill jumped
A bill that rises month after month while the household stays the same in Houston. On gumbo clay that stays damp, a crew in Houston checks the whole line, not just one spot.
- SIGN 03
Running water sound
A faint trickle that stops only when the main is closed on wet gumbo soil.
- SIGN 04
Damp or lifting floor
Wet carpet at an edge, cupped wood or hollow-sounding tile across Harris County.
- SIGN 05
Water heater never rests
Gas or power use that creeps up with no change in routine in 1960s-80s homes.
- SIGN 06
Meter moving, fixtures off
A dial that keeps turning after every tap is closed for Houston homes on wet gumbo soil.
Eight areas of Houston, by ZIP code
Houston has 97 ZIP codes. We group them into eight areas by geography, and each area has its own page.
Inner Loop, Montrose & Museum District
15 ZIP codes: 77002, 77003, 77004, 77005, 77006, 77007, 77010, 77019, 77025, 77030, 77046, 77054, 77096, 77098, 77201.
Galleria, Memorial & West Houston
13 ZIP codes: 77024, 77027, 77042, 77043, 77055, 77056, 77057, 77063, 77077, 77079, 77080, 77082, 77094.
Heights, Northside & North Central Houston
12 ZIP codes: 77008, 77009, 77016, 77018, 77022, 77026, 77037, 77076, 77088, 77091, 77092, 77093.
North Houston, Greenspoint & Intercontinental
18 ZIP codes: 77014, 77032, 77038, 77039, 77040, 77041, 77060, 77064, 77065, 77066, 77067, 77068, 77069, 77070, 77073, 77086, 77090, 77095.
East & Northeast Houston
11 ZIP codes: 77011, 77012, 77013, 77015, 77020, 77028, 77029, 77044, 77049, 77050, 77078.
Southeast Houston, Pasadena Edge & Clear Lake
11 ZIP codes: 77017, 77023, 77034, 77048, 77058, 77059, 77061, 77062, 77075, 77087, 77089.
South Houston, Medical Center & Missouri City Edge
10 ZIP codes: 77021, 77031, 77033, 77035, 77045, 77047, 77051, 77053, 77071, 77085.
Southwest Houston, Sharpstown & Alief
7 ZIP codes: 77036, 77072, 77074, 77081, 77083, 77084, 77099.
Neighboring communities
Pasadena · Katy · Sugar Land · Baytown · Pearland · Humble · Spring · Cypress · Missouri City · Stafford · Bellaire · Deer Park · La Porte · Friendswood · Galena Park · South Houston
Slab leak answers for Houston
Dense clay moves with moisture, and many houses built from the 1950s to the 1980s have copper under the slab. Years of small movement wear lines at bends and joints.
No. It can make a slow leak harder to notice because the ground is already damp.
Houses from roughly the late 1970s to the mid-1990s sometimes do. A technician confirms what a particular house has.
No. A leak in Houston is a plumbing matter first. A foundation contractor handles foundation questions.
In Houston, not under the main floor. A room added on concrete can. Harris County crews start with the simplest test and work toward the slab.
No. Sunlight, a vent or a heating cable can warm a floor. A spot that stays warm in shade with the heating off and follows a line can point to a hot-water leak.
In Houston, the technician isolates lines, pressure tests, listens with acoustic equipment and may use thermal imaging to narrow the location before any floor is opened.
Houses with older copper often do, depending on the home. After a second leak, rerouting or repiping may come up.
All of it. The eight area pages below group the city by ZIP code.
Slab leak repair and replacement in Houston
Call and we’ll connect you with a local Houston crew that uses acoustic, thermal and pressure-testing equipment. Crews serving Houston can explain what this means for an older copper-plumbed house.
Same-day response in many areas.