Wet flooring and mystery leaks
Wet Floor and Hidden Leak Detection Services in Texas
Last reviewed
Water on or under a floor does not always come from where you would expect. Before assuming a slab leak, it helps to rule out the simpler sources. Call and we’ll connect you with a local Texas crew for wet floor and hidden leak detection.
Tell us what you see and we’ll connect you with a local crew.
What a wet floor can look like
- Carpet that stays damp, or smells musty, in one area
- Laminate or hardwood that cups, lifts or swells
- Tile with discolored grout, or tiles that sound hollow or feel loose
- Baseboards that stain or swell near the floor
- Paint or drywall that bubbles low on a wall
- A soft or spongy feel underfoot
These are signs that moisture is present. They do not say where it comes from.
Simpler causes to rule out first
- A leak at a fixture or appliance. A dishwasher, refrigerator ice line, washing machine hose or sink trap can leak onto a floor.
- Condensation. Cold pipes or air handling equipment can drip.
- A roof or window leak. Water can travel along framing and appear far from where it entered.
- Outdoor drainage. Water pooling against the house after rain can seep under a door or through a wall.
- Spills and cleaning. A recurring damp spot in a kitchen or bathroom may have a simple explanation.
If the area is dry after a few days without rain or use of that fixture, the cause is probably one of these.
Describe where it is and when it appears.
The meter test
A moving water meter with everything off means water is escaping from the pressurized supply system somewhere. That could be a slab leak or a leak elsewhere. A meter that stays still, with the floor still damp, points away from the supply lines and toward another source. See water meter leak check.
When a slab leak is likely
A slab leak is more likely when:
- The meter moves with everything off
- The damp area stays in the same place and does not dry out
- There is a warm spot, or the sound of water, in or near the damp area
- No fixture, appliance or outside source explains it
- The home has slab-run supply lines
Water from a leak under the slab moves along the path of least resistance. It can rise through a crack, a joint or the edge of the slab, and appear some distance from the leak itself.
A technician can trace it before any floor is opened.
What a technician does
The technician asks about the history and where the water appears, checks the meter, isolates sections of the plumbing and tests each for pressure loss. If a line is leaking, acoustic equipment and thermal imaging help pinpoint it. The spot is marked before any floor is opened. See how slab leaks are found.
If no leak is found in the plumbing, the technician says so. Then the search moves to other sources.
A local crew knows how homes in your area are usually plumbed.
Drying and cleanup
Leak detection and repair stop the water. Drying and cleanup of wet flooring, cabinets and walls are handled by restoration companies, and replacing flooring is a flooring contractor’s job. Ask your plumber to recommend who to call, and ask them to confirm the leak is fixed before any drying begins.
Describe the signs you have seen.
How different floors show water
The type of floor changes what a leak looks like. Carpet can feel damp or cool, and the pad underneath can hold water for some time before the surface shows anything. A musty smell is often the first sign.
Tile and stone may show water at grout lines, or the grout may darken in one area. Tiles can loosen or sound hollow when tapped. Hardwood tends to cup or crown as it absorbs moisture, and laminate can swell at the seams. Vinyl plank can trap water beneath it with few visible signs until it starts to lift.
Concrete floors, whether bare or stained, may show a dark patch or a white mineral deposit where water has come through and dried. Each of these can come from a slab leak, but each can also come from something simpler, which is why the meter test comes first.
Timing and patterns worth noting
When you notice a wet floor, write down what you see and when. A few days of notes can tell a technician a great deal.
Note whether the area is warm, cool or room temperature. Note whether it gets bigger, stays the same or dries out. Note whether it appears after showers, laundry or dishwasher use, or whether it is there regardless. Check whether it is worse in the morning or the evening.
A patch that grows steadily whatever the household is doing points toward a supply leak under the slab. One that appears only after certain fixtures are used points toward a drain or a fixture connection. One that comes and goes with the weather may be groundwater or an exterior drainage problem. Photos with dates are useful too.
Appliances and fixtures to check
Before assuming a slab leak, check the appliances and fixtures near the wet area. Dishwashers, refrigerators with ice makers, washing machines and water heaters all have supply connections that can leak slowly. Look behind and under each one with a flashlight.
Toilets can leak at the wax ring, which lets water seep under the floor around the base. Showers and tubs can leak at the drain, the valve behind the wall, or through worn grout and caulk. A leak at a sink supply line can run down inside a cabinet and out along the floor.
If you find a source and fix it, dry the area and watch for a few days. If the floor stays wet or the meter still moves with everything off, the slab is the next place to look.
Air conditioning equipment is another common source. Condensate lines from indoor units can clog and overflow, and the water can run along the floor some distance from the unit. If your air handler is in a closet near the wet area, look at the drain pan and the condensate line. A clogged line can usually be cleared, and the wet floor dries once it is.
Check window frames and exterior doors near the wet area as well, since rain can enter there and travel along the floor.
Wet flooring and mystery leak questions
The source may be hidden in a wall, under the floor or outside. A meter check and a technician’s test narrow it down.
Yes. Water travels along the path of least resistance and may come up through a crack or at the slab’s edge.
A leak keeps coming back. A spill dries. A moving meter points to a pressurized leak.
No. Fixtures, appliances, roof leaks and outdoor drainage can all cause it.
Close the main water shutoff if you can reach it safely, keep people and pets away from wet areas and move valuables. Stay away from water near outlets or appliances.
Not before locating the leak. The aim is to confirm and mark the leak first, and to explain what any opening would involve.
A restoration company. The plumbing crew fixes the leak.
Prolonged dampness can lead to it. Mold assessment and cleanup are handled by specialists, and this site does not offer them.
If water is surfacing or the meter is moving fast, treat it as urgent. A slow, small leak can wait a short while, but should not be left for weeks.
Get the source of the water found
Call and we’ll connect you with a local technician who can trace the leak.
Same-day and emergency response in many areas.