Shower Pan Replacement and Repair in La Habra, CA

For homes in La Habra and four nearby towns (South Whittier, Hacienda Heights, Rowland Heights and Brea), Bathroom Remodeling Pros La Habra replaces and repairs shower pans. If a shower is leaking into the wall, the floor or the ceiling below, we repair or replace the shower pan. We're licensed and insured. The estimate is free, and we clean up when the work is done.

Shower Pan Work We Handle

The shower pan work we handle includes:

• Leaking showers: finding whether the water is escaping from the supply, the drain or the pan
• Shower pan replacement: taking up the floor tile and mortar bed, then building a new waterproof pan to the drain
• Drain repair: a worn gasket, a loose connection, or a clamping ring that no longer seals the liner to the drain body
• Prefabricated base replacement: a cracked or flexing plastic or cast polymer base swapped for a new one
• Curb and bench joints: the places where a tiled floor meets the curb, a bench or a niche, where a badly detailed tile pan is prone to leak
• Water-damaged subfloor: damaged subfloor repaired before the new pan goes in

What a Shower Pan Is, and the Types You'll Find

The shower pan is the waterproof layer under a shower floor that carries water to the drain. Some water gets through tile and grout, so in a site-built shower it's the pan underneath that keeps the floor and framing dry.

California's plumbing code lists what a site-built pan may be lined with: plastic sheet such as PVC or CPE, lead, copper, or other durable watertight materials. It also still accepts the older hot-mop method, where at least three layers of 15-pound asphalt-saturated roofing felt are each mopped in place with hot asphalt. Fine Homebuilding describes lead sheet and hot-mopped felt as time-tested but relatively outdated. Which kind an older shower has may not be clear until the floor tile comes up.

Not every shower has a site-built pan. Prefabricated bases made of plastic, cast polymer or terrazzo arrive already sloped. Newer systems use a lightweight foam tray with a waterproof membrane built in, such as Schluter's KERDI-SHOWER trays, which do away with the mortar bed and take tile set in thin-set directly on the membrane. A liquid-applied membrane such as Custom Building Products' RedGard SpeedCoat can also serve as the pan liner over a mortar bed.

Why Shower Pans Fail

In a traditional pan, the liner sits on a sloped mortar base called the pre-slope, and a mortar bed goes on top of the liner under the tile. Water that gets through the grout runs down the liner to small weep holes in the drain's clamping ring, which lead into the waste line. If the pre-slope was left out, or mortar blocked the weep holes when the shower was built, that water has nowhere to go. Schluter's installation handbook says the mortar bed can then stay saturated, and Fine Homebuilding links continuously wet pans with clogged weep holes to damp, moldy showers.

Other faults sit at the edges. The code also protects the liner at the curb: it may not be nailed or pierced less than 1 inch above the finished curb or threshold. The Journal of Light Construction names joints at curbs, benches, niches and knee walls as places where badly detailed tile pans tend to leak, and notes that a wood curb that isn't properly waterproofed swells when wet and can crack the tile over it. At the drain, a clamping ring that doesn't match the drain body may not press the liner against it to seal it; JLC describes one job where the ring had been fitted with its weep holes facing the wrong way and shimmed so it couldn't clamp the liner.

What a Shower Pan Replacement Involves

Replacing a tiled pan means taking up the floor tile, the mortar bed and the old liner down to the subfloor, which also exposes the subfloor for checking.

California's plumbing code (Section 408.8 in the 2025 edition) sets out how a site-built pan goes back in: the liner slopes 1/4 inch per foot toward the weep holes, runs at least 3 inches above the finished curb, and connects to a drain with a clamping ring (or an equivalent device) whose weep holes are protected from clogging. Section 408.6 adds that the finished shower floor must slope to the drain at 1/8 to 1/2 inch per foot.

Before any tile goes on, the pan is water tested. The current code calls for plugging the drain and filling the pan to a depth of at least 2 inches for at least 15 minutes. Manufacturers often ask for longer: Schluter and Noble give 24 hours as typical, and Oatey asks for at least two hours. Where a prefabricated base or a bonded foam tray suits the space better, it takes the place of the mortar bed. If the walls are failing as well, or you'd like to change the layout while the floor is open, a full shower remodel may be the better job.

Repair or Replace?

A leak below a shower isn't always the pan, so the source has to be found first. An article in the ASHI Reporter, the American Society of Home Inspectors' journal, sets out a sequence that rules causes out one at a time: run the supply with the showerhead swapped for a hose valve, run water down the open drain, pour water around the drain seal with the drain plugged, spray the walls and door, and only then fill the base to about an inch below the threshold to test the pan itself. This Old House also suggests checking behind the valve trim for water stains.

Some faults can be repaired. A worn drain gasket or a loose drain connection can be dealt with at the drain, cracks can be filled with a silicone made for wet areas, and loose tiles should be fixed promptly. A liner that has failed under the mortar bed is a different job: grout, caulk, sealers and coatings applied on top give a temporary fix at best, and the failed pan usually has to be opened up or replaced. The Journal of Light Construction's view is that a contained problem can sometimes be handled with a smaller repair, but full replacement is often the right answer.

Older Bathrooms and Hard Water Around La Habra

Nearly 80 percent of La Habra's homes were built before 1980, according to the city's Housing Element, so much of the town's housing has been in use for more than four decades. Brea's housing is also largely older: its Housing Element says 77 percent of owner-occupied homes there were built before 1989.

Hard water makes one sign of a leak easy to misread. La Habra's 2025 water quality report puts average hardness at 16 grains per gallon for the city's wells and 13 to 14 for its two imported sources, so white scale on shower glass is to be expected here. White crust on the ceiling under a shower is another matter: the Journal of Light Construction describes a job where calcium buildup on the ceiling below a leaking shower showed the leak had been running for a long time.

Have a leaking shower found and fixed as soon as possible. A stain or flaking on the ceiling below the bathroom, a stained baseboard or trim near the shower, loose floor tile in the bathroom or a room that shares the wall, or fresh paint on the ceiling under an upstairs shower can all point to a leaking pan.

The EPA advises drying water-damaged materials within 24 to 48 hours to prevent mold growth, and says porous materials that have gone moldy may have to be thrown away. Call (562) 662-⁠3566 to book a free estimate.

Typical Shower Pan Prices Around La Habra

Published cost guides put shower pan replacement at $300 to $4,600 in 2026 (checked November 2026). The type and size of the pan, how much tile and subfloor has to be replaced, and whether the drain or plumbing has to change decide where a job falls in that range. Shower pan repair isn't charted, because the guides use that name for very different jobs, so a repair is priced at the free estimate. These are typical published figures, local and national, not our prices; your free estimate gives the figure for your shower.

Shower Pan Repair in Brea and the County Towns

Permit rules differ across the five towns we cover. Brea's building permit page exempts the repair of leaks in pipes, valves or fixtures, but only where the repair doesn't involve replacing or rearranging valves, pipes or fixtures; upgrading or relocating a plumbing fixture does need a Brea permit. Hacienda Heights, Rowland Heights and South Whittier are unincorporated Los Angeles County, where LA County Public Works handles permits and inspection requests through its EPIC-LA portal. Within La Habra itself, permits come from the city's Building & Safety Division, which also inspects the work it permits. Which rules apply depends on your address and on what the job turns out to need. The main bathroom remodeling contractor in La Habra page covers the rest of our work.