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Tamko Bathroom Remodeling: The Riverside Owner’s Guide
If you have a Tamko bathroom product that’s starting to fail, or if you’re planning a bathroom remodel around Tamko waterproofing systems in Riverside, the installed cost typically runs $9,000 to $28,000 depending on the scope. That range covers everything from a shower surround replacement to a full tear-out and rebuild with new backer board, waterproofing, tile, and fixtures. Most homeowners call us after noticing grout cracking, soft spots in the wall behind tile, or water stains on the ceiling below a second-floor bathroom. What they usually don’t know yet is whether the problem is the Tamko waterproofing membrane itself, or the tile and grout on top of it. That distinction drives the whole repair-and-replace conversation.
We’re not affiliated with Tamko. We’re an independent Riverside remodeling company, and we work with Tamko waterproofing products because they hold up in our climate when installed correctly. We’ll get into that below.
Which Tamko Models This Applies To
Tamko’s bathroom product line mostly comes down to waterproofing membranes and backer boards, not full shower systems like some brands sell. The two products we see most often in Riverside homes are Tamko’s waterproofing membrane, used behind tile in shower walls and tub surrounds, and their fiber cement backer panels. If you’re looking at a rusty shower pan or crumbling grout, that’s usually a different issue, and we’ll help you figure out what’s actually failing. The easiest way to tell what you have is to remove the trim plate on your shower valve and look for a branded edge or label. A quick measurement of the backer board thickness, 1/2 inch or 5/8 inch, also narrows it down.
The compatibility gotcha on these jobs is this: Tamko membranes are designed to work with specific thinset mortars and sealants. Now, homeowners usually only find out their old remodel used the wrong product after the tile starts moving. We check the membrane’s sealant compatibility during the estimate because if it was installed wrong the first time, replacing the tile without fixing the waterproofing is just burning money. We also stock KraftMaid, Cambria, and Silestone products when a remodel calls for new cabinetry or countertops alongside the waterproofing work, but Tamko-specific materials are what we’re matching here.
Styles & brands we work with
Signs Your Tamko Bathroom Remodeling Is Failing
- Grout cracks that keep coming back after recaulking. This tells us the substrate behind the tile is flexing, which usually means water got in and started deteriorating the backer board. Recaulking buys you a month, not a fix.
- Soft spots in the wall when you press near the shower floor or tub lip. Water has penetrated the membrane or was never sealed properly at the seam. In Riverside’s dry summers, this can be deceiving because the wall dries out and feels fine for a while. The damage underneath doesn’t go away.
- A persistent musty smell in the bathroom even after cleaning. Trapped moisture in the stud cavities behind the shower is pooling. It’s not the grout. It’s the air behind the wall.
- Water stains or bulging drywall on the ceiling below a second-floor bathroom. By the time this shows up, you’re past a simple repair. It usually means the membrane has failed at the shower pan or curb junction and water has been running for weeks.
- Discolored grout that won’t lighten with cleaning. Some staining comes from hard water, but if the grout looks dark in one area consistently, there’s likely water behind it pushing minerals to the surface. That’s a waterproofing problem, not a housekeeping problem.
See the difference
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After
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After
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AfterReplacement Cost & What’s Included
In Riverside, the installed cost for Tamko-specific bathroom work falls into three tiers. A shower surround rebuild where the waterproofing gets replaced and the existing tile is kept simple runs $4,500 to $12,000. A full bathroom remodel with new Tamko membrane, backer board, tile, and fixtures lands at $9,000 to $28,000. If your project overlaps with kitchen work, like a shared wall or a bigger remodel, the overall project range widens, and we’ll write that number out before any demo starts. What drives the price up or down: the size of the wet area, how much water damage is hidden behind the tile, the tile you choose, and whether we’re rebuilding a tub surround or a walk-in shower.
Our written price includes everything: demolition, disposal, reinforcement, waterproofing, tile, grout, sealant, fixtures, and clean-up. No change orders at the door. Every Tamko remodel we complete includes the 365-Day Done Right Promise in writing. If something fails inside that year, we come back and fix it at no charge. If a repair fails, the return visit is also free.
DIY or Call Us?
You can check things without touching a tool: press on the walls, look for cracks, and note any stains. That helps you understand the scope before you call. But if the issue is behind the tile, do not pull that tile down yourself. The waterproofing work in a shower has to be continuous, and if the membrane was installed incorrectly the first time, taking it apart wrong just exposes more of the framing before we arrive. Tamko membranes require specific sealants and overlapping patterns, and the failure rate on DIY repairs is high enough that we see them regularly, usually six to twelve months after the tile goes back up.
And here’s the thing about my background: I grew up in LA and started in a trade program at Los Angeles Trade-Technical College, where the first lesson was that a good remodel starts with knowing exactly what you’re getting into before swinging the hammer. I’ve been doing this work across the Inland Empire for the better part of two decades, and my crew has spent real time on Riverside homes, including a stretch of jobs in the Arlington neighborhood where older houses have a habit of keeping you honest about what’s behind the walls. Give you a number before we pick up a tool, that’s just how this works.
If you’re not sure what you’re looking at, call (341) 895-1170 and we’ll come look at it. Estimates are free, and you’ll get a written number you can hold us to.
FAQs
A correctly installed Tamko bathroom waterproofing system can last 20 to 25 years in Riverside’s climate. The two killers here are poor installation and water that gets behind the membrane through a failed seal. When the membrane is done right and the tile above it stays intact, it holds.
It depends on where the failure is. If a seam has separated near the shower valve or at a corner, a targeted repair is sometimes possible. If water has been behind the wall for months, the framing and backer board need to come out. Call (341) 895-1170 and we’ll tell you which one you’re dealing with after a single visit.
Most Tamko-related bathroom remodels here take 2 to 4 weeks, depending on the size and how much water damage we discover. Clean, contained work is part of The Kingswell Way, and we’ll give you a real window before the job starts.
We carry Tamko membranes and backer board on the truck for most standard shower sizes. If your remodel needs something unusual, we can usually have it in hand within a few days. Call (341) 895-1170 for a free estimate and we’ll confirm availability for your specific project.
Written by Trevor Nash, Owner, Penhallow Remodeling Riverside at Penhallow Remodeling Riverside, serving Riverside and nearby areas.
