Bathtub Leak Detection and Repair in Round Rock, TX
A bathtub usually tells on itself through the ceiling below. Whether the stain shows while the tub fills, while it drains, or only during a shower points us straight at the part that failed.
Where tubs leak
A bathtub has a few classic failure points. The overflow gasket behind the front of the tub dries out and lets water past when the level rises. The drain shoe under the tub weeps where it seals to the body. The waste and trap below can leak like any drain. And the surround, where tile or a panel meets the tub edge, lets shower water slip behind the wall when the grout or caulk fails.
In the Meadows of Brushy Creek and other 1990s homes, the overflow gasket and the drain shoe are the parts that age out first, since the original rubber has had decades to harden.
Filling vs draining tells us where
Timing is the diagnosis. A leak that appears as the basin fills toward the overflow points at the overflow gasket. A leak that shows only while the bath empties points at the drain shoe or the waste below. A stain that grows during a shower, with the basin empty, points at the surround and the grout, not the plumbing at all. We reproduce each case and watch the ceiling to confirm which one you have.
If the spot below your bathtub darkens at a specific moment, that timing is the clue. Call (512) 737-6168 and we can match it to the part.
Gasket, shoe, or surround repair
A failed overflow gasket is replaced from the access behind the tub. A weeping drain shoe is resealed or renewed, and a corroded waste and trap get new components. A surround leak is a different animal: we cut out the failed grout or caulk, check the substrate for damage, and reseal the joint so shower water stops getting behind the tile. Acrylic and enameled cast-iron tubs each take a different sealant, so we choose the product rated for that specific surface. We match the repair to the source we proved, not to guesswork, so the fix holds the first time.
Tile, grout, and the splash zone
The wall around a tub takes a daily soaking, and the hard water here is unkind to it. Mineral-laden water wears at grout and caulk, opening hairline gaps where water sneaks behind the tile. Once the substrate gets wet repeatedly, it can soften and let the tile loosen, which widens the gap and speeds the leak. Keeping the grout and caulk sound is cheap insurance against a behind-the-wall repair.
Access is the part homeowners worry about most, and it is usually better than they fear. Many tubs have a removable panel at the head end, or back up to a closet or hallway wall where we can reach the overflow and drain without touching tile. We look for that path first, because reaching the plumbing from behind keeps the finished side of the bathroom intact. Only when there is no panel and no reachable back wall do we talk about opening tile, and even then we open the smallest window the repair needs. You hear the plan and approve it before anything is cut.
What to expect when we arrive
We have you fill, drain, and shower in turn so we can watch the ceiling and match the leak to the moment it appears. You hear the part that failed and the repair first. With your go-ahead we make the fix through the smallest access we can and re-test to confirm the leak is gone.
We clean up and leave the area dry. For a tub actively leaking into the room below, call (512) 737-6168 and we can take care of it.
Not sure what you are dealing with? Talk it through.
📞 (512) 737-6168Frequently Asked Questions
My ceiling only stains when the tub drains. What is it?
That timing points at the drain shoe or the waste line under the tub, not the overflow. We reproduce it to confirm before opening the access.
Water shows during a shower but not a bath. Why?
That usually means the surround, where grout or caulk has failed and shower water slips behind the tile. It is a sealing repair, not a plumbing one.
Do you have to break the wall to fix a tub leak?
Often we reach the overflow and drain from an access panel behind the tub. A surround leak is fixed at the joint. We open only what the repair needs.