Shower, toilet and tub leaks in Spokane, WA
Bathroom leak water damage repair in Spokane
Bathroom leaks hide under tile and behind walls. The damage usually shows up a room away, or in the ceiling below.
- Answered 24/7
- Shower pans and toilet seals
- Subfloor drying
Quick answer
Bathroom leak water damage in Spokane usually comes from a failed shower pan, a toilet supply line or wax ring, or a tub overflow, and it spreads under tile and into the wall or ceiling below. Repairs begin with tracing the leak using moisture meters, then drying the subfloor and wall cavity before any tile or drywall goes back.
Updated October 2026
Why bathroom leaks do more damage than they look
Tile and grout look waterproof, but they are not. Water gets through grout lines into the mortar bed and the shower pan below, and a hairline gap in the caulk at a shower corner lets more in with every use. If the pan has failed, water seeps into the subfloor, the framing and the drywall next to the shower, often for months before anyone sees it.
Toilets and tubs add their own leak paths: the wax ring, the supply line, the overflow gasket. We trace water with meters and a thermal camera, often from the room or ceiling below. If the water reached the floor underneath, the ceiling repair is part of the same job. Fixing the plumbing and drying the structure are separate tasks, and both need to happen before new tile goes down.
Cost
Bathroom leak repair cost factors
LawnStarter's 2026 cost data puts drywall work at about $1 to $3 per square foot nationally, a common line item when a bathroom leak reaches the wall or ceiling. That is a planning range, not our price. The larger costs on a bathroom job usually come from pulling and replacing tile, rebuilding a shower pan, or replacing subfloor that has rotted. The plumbing repair is separate.
Shower pan leaks
A shower pan is the waterproof layer under the tile floor of a shower. When it cracks or the seal at the drain fails, water passes through the grout, soaks the mortar bed and drips onto the subfloor. The signs are often outside the shower: loose tile on the bathroom floor beside it, a stain on the ceiling below, or a soft spot where you step out. Fixing it means pulling the tile and rebuilding the pan, and we dry the subfloor and framing before that happens.
Toilet supply lines and wax rings
The braided supply line between the wall valve and the toilet tank can crack or come loose, flooding the floor quickly. A failed wax ring at the base leaks a little with every flush, soaking the subfloor under the toilet over weeks. Supply line water is clean. Wax ring seepage is Category 2 because it carries waste water. We pull the toilet when needed, dry the subfloor around the flange and check whether the plywood has rotted and needs replacing before a new ring goes on.
Tub overflow
A tub left running overflows across the floor, and water flows under the vanity, into the hallway and down into the ceiling below. A failed overflow gasket leaks every time someone fills the tub above the overflow drain, and the water runs down inside the wall. The source is easy to find. The damage is not, since it spreads through floor joists and into the room below. We extract, check the ceiling and walls underneath, and dry the framing between floors.
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How we handle a bathroom leak
- 01
Trace the leak
We test the shower, toilet and tub one at a time while metering the floor and room below.
- 02
Stop it
The source gets shut off or isolated until the plumber repairs it.
- 03
Open what is needed
Only the tile, drywall or ceiling that readings show is wet gets removed.
- 04
Dry the subfloor and framing
Air movers and dehumidifiers run until the wood reads dry.
- 05
Hand off for rebuild
Tile, drywall and fixtures go back once everything reads dry.
Local conditions
Bathrooms in Spokane's prewar houses
Spokane has 26,157 homes built in 1939 or earlier, more than any other single age group in the city. Bathrooms in those houses were often added onto or remodeled several times, with new tile laid over old floors and showers built where none existed before. Original cast iron drains and galvanized supply pipes may still sit behind the newer finishes. When a leak shows up in a house that old, we expect water to have taken unusual paths through the framing and check accordingly.
Signs a bathroom is leaking
These usually show up well before a floor gives way.
Loose or cracked floor tile
Water under the tile breaks the bond with the mortar.
A rocking toilet
Movement at the base often means the wax seal or subfloor has failed.
Stains on the ceiling below
The most common sign of a shower or tub leak upstairs.
Peeling paint next to the shower
Water inside the wall pushes the paint film away.
A musty odor that cleaning does not fix
Damp framing behind the tile is the likely source.
Bathroom leak tasks you can try and ones to leave
A few checks are easy; the rest involves opening tile and walls.
| Task | Doing it yourself | When we do it |
|---|---|---|
| Shutting off the toilet supply | Turn the valve behind the toilet clockwise. | If the valve is stuck, we use the main. |
| Re-caulking the tub edge | Worth doing for small gaps around the tub. | Not a fix for a failed pan or overflow. |
| Testing the shower | Run it while someone watches the ceiling below. | We meter to confirm the source. |
| Pulling up tile | Hard to do without breaking pieces. | We remove only what readings require. |
Bathroom Leak Water Damage questions
Loose tile outside the shower, a stain on the ceiling below or a soft floor near the shower door are common signs. We confirm it with moisture readings while the shower runs.
Yes. The space under tile and behind shower walls stays dark and damp, which is ideal for mold. A slow leak that ran for months often leaves mold on the subfloor and framing.
It is not a flood, but every flush adds water to the subfloor, and that water carries waste. Over time the plywood rots. Get it fixed and the subfloor dried soon.
Not usually. We remove only the tile over areas that read wet. A failed shower pan, though, means the shower floor tile has to come out so the pan can be rebuilt, and wall tile sometimes follows.
If the bathroom is upstairs and the leak ran for a while, it often does. We check the ceiling below with meters even when it looks fine, because water can sit on top of drywall before any stain appears.
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Answering 24/7
Bathroom leak showing up somewhere else?
Call any hour. We will trace the source and dry the floor and walls it reached.
1876 N Teanaway Dr, Post Falls, ID 83854