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Is Your Shower Leaking Behind the Tile? Shower Pan Leak Signs for Murrieta Homes

By the Murrieta Leak Pros team ·

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A shower is used every day, so even a small leak adds up fast. Water can slip through cracked grout, a worn seal or a failed shower pan and soak the floor or wall behind the tile. This guide shows the signs of a shower pan leak, two simple tests you can do and what to do next. If you see damage but cannot find the source, our water leak detection team can help. Call (951) 299-3473.

What is a shower pan leak?

A shower pan is the waterproof layer under a tiled shower floor. It guides water to the drain. When the pan cracks, wears out or was not installed right, water seeps under the tile and into the subfloor, the slab edge or the room next door instead of going down the drain.

Leaks can also come from other parts of the shower. Cracked grout, a gap at the drain, worn caulk at the corners, or a leaking valve behind the wall can all look like a pan leak at first.

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Infrared thermal imaging camera showing a cool spot on a wall
Infrared thermal imaging camera showing a cool spot on a wall

What are the signs of a shower leak?

Common signs are stains or bubbling paint on the wall next to the shower, damp or lifting flooring outside the shower, loose or cracked floor tiles, dark grout that never dries, a musty smell and mold at the base of nearby walls. In a two-story home, a stain on the ceiling below is a strong clue.

  • Baseboards near the bathroom swell or pull away from the wall
  • Carpet in a closet or bedroom next to the shower feels damp
  • Tiles sound hollow or move when you step on them
  • Small bugs, like silverfish, gather near the shower
  • The leak is worse right after someone showers

How can I test my shower for a leak?

Two simple tests help narrow it down. A flood test checks the pan: plug the drain, fill the shower floor with about an inch of water, mark the level and wait several hours. If the level drops, the pan or drain is leaking. A spray test checks the walls and door: spray only the walls for 10 minutes and look for new damp spots.

  1. Dry the area outside the shower and take a photo of any stains.
  2. Do the spray test first, then let everything dry for a day.
  3. Do the flood test with the drain plugged. Use tape to mark the water line.
  4. Check the level after 4 to 8 hours, and check nearby walls and floors.
  5. Note which test made the damp spots worse.

If neither test shows a leak but stains keep growing, the problem may be the water supply pipe or valve behind the wall. That leak runs even when no one is showering.

Have a leak? Don’t wait for it to get worse.

Our technicians are standing by 24/7 with the equipment to find your leak fast. No unnecessary digging, no guesswork.

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Can a shower leak cause a slab leak?

No, but the two can look alike. A shower leak only happens when the shower is used. A slab leak comes from a pressurized pipe under the floor and runs all the time. A water meter test with everything off tells them apart: if the meter moves, the leak is in a supply line, not the shower pan.

Learn how to do the meter test in our high water bill guide, and read the signs of a slab leak.

How do pros find a hidden shower leak?

A technician uses moisture meters and thermal imaging to map where water has spread, then tests the drain, pan and supply lines one at a time. This finds the source before any tile is removed, so the repair can be smaller.

See how these tools work in our guide to how leak detection works and our article on a water leak behind a wall.

What should I do until it is fixed?

Use another shower if you can. Dry wet areas with fans, move rugs and furniture away from damp walls, and take photos for your records. Do not cover stains with paint until the leak is fixed and the wall is dry.

Approx. costs in Murrieta (estimates for planning only)
ServiceApprox. cost
Hidden water leak detection visit$200 to $550
Slab leak detection (typical home)$250 to $650
Spot repair on an accessible pipe$300 to $1,500

We serve homes in Copper Canyon, Bear Creek, Murrieta Hot Springs and across Murrieta. If a leak is found, our leak repair options are priced before work begins.

Frequently asked questions

How long does a shower pan last?

Many last 20 years or more when installed well. Older or poorly installed pans can fail sooner, especially if grout and caulk are not kept up.

Can I just regrout to stop a shower leak?

If the leak is through cracked grout on the walls, new grout and caulk may fix it. If the pan under the floor has failed, regrouting will not stop the leak.

Does homeowners insurance cover a shower pan leak?

Policies often exclude slow, long-term leaks. Damage from a sudden leak may be covered. Check your policy and take photos early.

Is mold from a shower leak dangerous?

Mold can bother people with allergies or asthma. Fix the leak, dry the area and clean or replace damp materials.

Prices are approximate estimates for planning. Your final price depends on your property and is confirmed before work begins.

Where can I get help with this in Murrieta?

Murrieta Leak Pros offers Water Leak Detection, Leak Repair & Trenchless Pipe Repair. We serve every Murrieta neighborhood:

We also serve Temecula, Menifee, Wildomar, Lake Elsinore, Winchester, French Valley, Canyon Lake, Hemet and Sun City. See all service areas →

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Call Now: (951) 299-3473Request a Callback
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