Shower Leak Detection and Repair in Round Rock, TX
A shower leak hides behind tile, so it shows up as a stain on the other side of the wall or the ceiling below. Finding it means telling a plumbing leak apart from water getting past the grout.
How showers leak
Showers leak two broad ways. The plumbing can fail, where the mixing valve, the shower arm, or the supply behind the wall weeps under pressure every time the water runs. Or the waterproofing can fail, where grout, caulk, or the seal at a glass door lets water slip past the tile and into the wall. They look similar from the damaged side but need very different repairs.
In Twin Creek homes with tiled showers from the 2000s, the valve seals and the grout lines are the parts that tend to give first, after years of hard water and daily use.
Valve, grout, or door
We separate plumbing from waterproofing first. Running the shower with the drain blocked tests the valve and supply under pressure, and a moisture reading behind the wall shows a true plumbing weep. Flooding the threshold and the door track, with the water off, tests the seal and the grout instead. A stain that only appears while the shower runs, then stops, narrows it quickly. We confirm the path before opening tile, because the wrong guess here means cutting into a wall that was never the problem.
If a wall next to your shower stays damp, call (512) 737-6168 and we can find whether it is the pipe or the grout.
Sealing versus rebuilding
A valve or supply leak behind the wall is reached through the smallest access we can make, usually from the back side, and the failed part is replaced. A grout or caulk failure is cut out, the substrate checked, and the joint resealed so water stays in the shower. Where the waterproofing under the tile has broken down across the wall, we are honest that a reseal is a patch and a proper repair means addressing the membrane. We tell you which situation you are in.
Hard water on the shower valve
The mixing valve takes the brunt of Round Rock's hard water. Scale builds inside the cartridge, drags on the seals, and eventually lets water weep behind the wall even when the handle is off. The same minerals roughen grout and open the hairline gaps that start a waterproofing leak. A valve that drips behind the tile or a grout line that keeps cracking is often the scale talking.
A glass shower door has its own quiet leak path that often gets blamed on the plumbing. The sweep at the bottom of the door wears out, the track collects standing water, and the seal where the frame meets the tile dries and cracks. Water then escapes onto the floor and tracks under the tile or out to a neighboring wall, reading for all the world like a pipe leak. We check the door, the sweep, and the track before opening any wall, since a worn sweep is a five-minute fix and a torn-open wall is not.
What to expect when we arrive
We test the plumbing and the waterproofing separately so the repair targets the real cause, not the easier guess. You hear which it is and the cost before any tile comes off. With your go-ahead we make the fix and re-run the shower to confirm the wall stays dry.
We clean up and leave the area sound. For a shower actively leaking into a wall or the room below, call (512) 737-6168 and we can get to it.
Not sure what you are dealing with? Talk it through.
📞 (512) 737-6168Frequently Asked Questions
Is my shower leak the pipes or the grout?
We test them separately. Running the shower under pressure checks the valve and supply, while flooding the threshold with the water off checks the grout and door seal.
Why does the stain only appear when the shower runs?
That points at a plumbing leak in the valve or supply, which only weeps under pressure. A grout leak often shows from standing or splashing water instead.
Can you fix it without retiling the whole shower?
Often, yes. A valve leak is reached through a small access, and a grout failure is resealed at the joint. A broken-down membrane across the wall is a bigger job, and we will say so.
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