Shower Pan Leak Detection and Repair in Round Rock, TX
A shower pan leak is the slow, quiet one. The waterproof layer under the shower floor fails, and water seeps past the tile into the subfloor or the ceiling below, often long before anyone connects it to the shower.
What the pan does and how it fails
Under the tile of a shower floor sits a waterproof pan or liner, the layer that actually keeps water from reaching the structure. Tile and grout are not waterproof on their own; the pan is. Over time the liner can crack, the drain connection can loosen, or the slope can settle so water pools and finds a weak seam. When the pan fails, water bypasses everything above it and goes straight into the subfloor. Older showers used a hot-mopped felt or a sheet vinyl liner set in a mortar bed, and either material can split or shrink with age.
In Teravista and other 2000s homes, tiled showers from the original build are now old enough for the pan beneath them to start letting go.
Telling a pan leak from a valve or grout leak
This matters because the repairs are completely different. A pan leak usually shows up after the shower has run a while. It appears as a stain on the ceiling below or a damp baseboard on the far side of the wall, with the shower walls themselves dry. A valve leak weeps from higher up under pressure, and a grout leak tracks with splashing on the walls. We sort out which one you have before touching tile.
If the room under your shower stains after use, call (512) 737-6168 and we can test the pan directly.
Flood testing to confirm the pan
The pan gets its own test. We plug the drain and fill the pan with water to a set level, then watch it over time and check the ceiling or floor below for the leak to appear. A pan that loses water in the test, or shows a leak downstairs while the walls stay dry, confirms the base is the problem. Dye in the water and a moisture meter below pinpoint where it escapes.
Repairing or rebuilding the pan
A minor drain-connection leak can sometimes be repaired at the assembly. A failed liner, though, is not something you patch from the top and trust. A proper fix means rebuilding the pan: removing the floor tile, replacing the waterproof membrane and drain, re-sloping to the drain, and re-tiling so the base actually sheds water again. We are honest about which situation you are in, because a cheap surface patch over a failed pan just hides the leak until the damage is worse.
A proper rebuild also fixes the cause, not just the symptom. We set the new drain at the right height, build the slope so water runs to it instead of pooling, and lap the membrane up the walls the way it should have gone in. Done that way, the new pan sheds water for the long run rather than failing again at the same tired seam.
Why catching it early saves the subfloor
A pan leak is slow, so it does its damage out of sight. Water seeps into the subfloor, swells it, and feeds mold in the dark space under the tile, sometimes for months before the ceiling below shows a stain. The longer it runs, the more of the floor structure it reaches, which turns a pan rebuild into a framing repair. Round Rock's humid climate keeps that hidden space damp and slow to dry. Call (512) 737-6168 if the room below your shower is showing water.
Not sure what you are dealing with? Talk it through.
📞 (512) 737-6168Frequently Asked Questions
How is a shower pan leak different from a regular shower leak?
A pan leak is in the waterproof base under the floor tile, so it leaks into the subfloor after the shower runs. A valve or grout leak is higher up and behaves differently. We test to tell them apart.
Can you fix a pan leak without redoing the shower floor?
A loose drain connection can sometimes be repaired. A failed liner usually needs the pan rebuilt, since a surface patch over a bad membrane only hides the leak. We tell you which you have.
How do you confirm it is the pan?
We flood-test it: plug the drain, fill the pan, and watch for loss and for a leak to appear below while the walls stay dry. Dye and a moisture meter pinpoint the spot.
Related leak services
Valve, grout, and door leaks behind a tiled wall.
View → BathtubOverflow gaskets, drain shoes, and the stain on the ceiling below.
View → CeilingBrown rings and sagging drywall fed by a leak from above.
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