Free written scope consultation - allowances, timeline, and change-order rules on paper before a single trade is scheduled
James Hardie Bathroom Remodeling: The Los Angeles Owner’s Guide
A full James Hardie bathroom remodel in Los Angeles typically runs $10,620 – $33,040 installed, and that number includes the written scope, the materials, the permit coordination, and the clean-up before we leave. Most Los Angeles homeowners call us when they notice water staining at the base of their HardieBacker joints, cracked grout lines that keep reappearing, or soft spots in the subfloor under the tile. The failure is rarely the HardieBacker board itself; it is usually what happened behind it or under it.
James Hardie makes cement board products that hold up exceptionally well in Los Angeles humidity swings, but the board is only as good as the waterproofing membrane, the fasteners, and the seaming work around it. When one of those layers fails, water gets behind the board and the damage starts where you cannot see it. That is the remodel you are pricing right now.
Which James Hardie Models This Applies To
In bathrooms, the James Hardie product we work with most often is HardieBacker cement board in ¼-inch and ½-inch thicknesses, plus HardieBacker 500. The ½-inch board is for walls and ceilings; the ¼-inch board is for floors and countertops. If you have an older Los Angeles home with a mid-century bathroom, you may have HardieBacker EZ Grid, which has a different fastener spacing template than the current board.
One compatibility gotcha we see on Los Angeles job sites: HardieBacker is not waterproof on its own. It is water-resistant. That means the waterproofing layer, whether it is a Schluter membrane or a liquid-applied system like RedGard, is doing the actual sealing. If a previous remodel skipped that step because the board “looked fine,” the failure is only a matter of time. We stock OEM HardieBacker board on the truck, and we also carry Schluter Kerdi membrane as the aftermarket waterproofing partner because the two systems are designed to work together in tub surrounds and walk-in showers.
Styles & brands we work with
Signs Your James Hardie Bathroom Remodeling Is Failing
- Grout cracks in the same places every few months. This usually means the substrate behind the tile is flexing. That flex could be a failed HardieBacker seam, missing fasteners, or subfloor movement. Re-grouting will not fix it.
- Tile feels hollow when you tap it. Hollow tile means the thinset bond has broken, often because the HardieBacker was not bedded correctly or the wrong thinset was used for a cement board substrate.
- Water stains on the ceiling below the bathroom. This is the one that gets our attention fastest. It means water has traveled through the shower pan or tub surround, behind the HardieBacker, and down into the framing. By the time the stain shows, the leak has been active for a while.
- Musty smell that will not go away. Trapped moisture behind cement board feeds mold in the wall cavity. The board might feel dry to the touch on the surface while the back side is soaked.
- Loose or popping fasteners behind the tile. If you can see any corner of the board and the fasteners are corroded or standing proud, the board was either installed with the wrong screws or it has been wet long enough to compromise the fastener seats.
See the difference
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After
Before
After
Before
AfterReplacement Cost & What’s Included
A James Hardie bathroom remodel in Los Angeles falls into the $10,620 – $33,040 range depending on what has to come out and what goes back in. A small bathroom with a tub surround replacement might land at the lower end. A full gut with a walk-in shower, new HardieBacker on every wall, a Schluter waterproofing system, and custom tile work approaches the top.
| Scope | Los Angeles Installed Range |
|---|---|
| Tub surround: HardieBacker, membrane, tile, fixtures | $5,900 – $14,160 |
| Walk-in shower conversion: full HardieBacker + Schluter system | $5,310 – $14,160 |
| Full bathroom remodel: HardieBacker throughout, new pan, tile, vanity, fixtures | $10,620 – $33,040 |
Every quote includes the written price before we start, the demolition and debris removal, the new HardieBacker board, the waterproofing layer, the tile and setting materials, the plumbing rough-in and finish work, and the final clean-up with a photo before the crew leaves. The 365-Day Done Right Promise covers the work for a full year after completion. If something is not right, we make it right.
DIY or Call Us?
You can safely check a few things on your own. Look at the grout lines with a flashlight at eye level. Tap the tile with the handle of a screwdriver and listen for hollow spots. Check the ceiling below the bathroom for any discoloration. Those observations will help us quote more accurately over the phone.
What we would not recommend is pulling the tile and the board yourself. Cement board contains silica, so cutting it creates dust you do not want in your lungs or your kids’ rooms. And if the failure involves a shower valve or drain assembly, getting the waterproofing sequencing wrong means the next failure is already built in. The written scope is the promise – if it is not on the paper, we have not agreed to it yet. Call (949) 850-9896 and we will walk you through what we would check first.
FAQs
A correctly installed HardieBacker and waterproofing system should last 25 to 30 years or more in a Los Angeles bathroom, which is about how long the tile assembly on top of it should last as well.
Sometimes, yes, if the failure is localized to one seam or a small section of wall; but if water has reached the subfloor or framing, the damaged material has to come out before we can quote an honest fix. Call (949) 850-9896 to schedule a free estimate and we will tell you which situation you have.
Most tub surrounds and shower conversions take 5 to 10 working days; a full bathroom gut with all new board, membrane, pan, and tile typically runs 2 to 4 weeks depending on material lead times and Los Angeles permit scheduling.
We stock HardieBacker in both thicknesses, Schluter Kerdi membrane, fasteners, and the thinsets and grouts we use on every install, so we are not waiting on a supplier before we can start your Los Angeles project.
Written by Graham Stein, Owner, Elmstead Remodeling at Elmstead Remodeling, serving Los Angeles and nearby areas.
