Free written scope consultation - allowances, timeline, and change-order rules on paper before a single trade is scheduled
Tamko Bathroom Remodeling: The Los Angeles Owner’s Guide
If you have Tamko materials in your bathroom and a component has failed, we can source the part, match it to your existing install, and complete the work. A Tamko-related bathroom remodel in Los Angeles typically runs $10,620 to $33,040 depending on scope, but a single failed component swap, like a shower valve or drain assembly, usually lands on the lower end. Most owners discover the problem through water where it should not be: a slow drip behind the wall, a soft spot at the tub edge, or grout that stays damp long after the shower was last used. Graham Stein grew up in Silver Lake and has spent nearly two decades working on Los Angeles homes, so he knows how hard water in this region wears on seals, gaskets, and finished surfaces faster than manufacturers often expect.
Which Tamko Models This Applies To
Tamko products that end up inside a bathroom remodel are usually waterproofing membranes, backer boards, or composite trim boards rather than a named bathroom fixture line. The most common call we get involves a Tamko waterproofing layer behind tile in a shower or around a tub. Your compatibility question comes down to what was specified on the original job: membrane thickness, substrate type, and which setting material the tile was bedded with. If you pull the escutcheon plate off your shower valve and can read a label, that helps us match the replacement exactly. If not, we measure the exposed edge and check the substrate composition before we order anything.
As an independent contractor, Elmstead Remodeling is not affiliated with Tamko, but we work with their products regularly. For a Tamko waterproofing membrane, OEM is almost always the right call; the chemistry is matched to specific thin-set mortars, and a “universal” aftermarket substitute can void your tile warranty and your waterproofing guarantee in one move. For trim boards and backer panels, quality aftermarket equivalents are fine in most situations. We stock common Tamko-spec backer fasteners, sealants, and corner reinforcement on the truck; membranes and trim we order per job so you are not paying for warehouse overhead.
Styles & brands we work with
Signs Your Tamko Bathroom Remodeling Is Failing
- Water staining on the ceiling below the bathroom. This usually means the waterproofing layer was pierced or the seam tape failed at a corner. The stain shows up weeks or months after the leak starts because water travels slowly through the subfloor before it finds a seam to drip through.
- Grout stays dark or wet around the tub rim or shower floor edges. Water is wicking behind the tile and not draining forward. That points to a slope issue, a failed membrane lap, or clogged weep holes in the drain assembly.
- Caulk pulls away from the tub flange or shower pan within a year of application. Movement in the substrate or water trapped behind the caulk line breaks the bond over and over. Re-caulking treats the symptom; the underlying waterproofing detail needs to be checked.
- A musty smell that returns after cleaning, even when surfaces look dry. Moisture is trapped in the wall cavity or under the pan, which in Los Angeles humidity cycles can mean mold growth behind the membrane. The surface can look fine while the framing slowly rots.
- Trim boards or wall panels at the shower base swell, cup, or darken at the cut edges. Water is getting past the sealed edge. Tamko composite trims handle contact with water well, but only when end cuts and fastener heads are properly sealed at installation.
Replacement Cost & What’s Included
A full Tamko-focused bathroom remodel in Los Angeles runs $10,620 to $33,040. A targeted repair, like replacing a failed waterproofing seam behind a section of tile, starts lower, but the honest truth is that once water has been traveling behind tile, you are usually dealing with more than the spot you can see. We do not try to sell you a bigger job than you need; we tell you what we found and what it costs to fix it correctly.
Every project gets a written price before any work starts. That line item list names the Tamko product, the coverage area, the setting materials, and the labor. If we open the wall and find additional rot, we stop and explain the new number before we touch anything else. The written scope is the promise: if it is not on the paper, we have not agreed to it yet.
- Tamko membrane or trim replacement: $945 to $3,540 depending on access and area.
- Shower base waterproofing rebuild: $5,310 to $10,030 when the pan or sloped bed must come out.
- Full bathroom remodel with Tamko waterproofing: $10,620 to $33,040, including tear-out, substrate repair, membrane installation, tile, fixtures, and finish work.
- Tub-to-shower conversion with new waterproofing: $4,130 to $11,800, which includes new drain placement and Tamko membrane behind the new tile.
All work carries our 365-Day Done Right Promise. If something is not done right after the job is complete, we make it right.
See the difference
Before
After
Before
After
Before
AfterDIY or Call Us?
You can safely handle a few things yourself. Remove the escutcheon plate and look for a label. Test whether the grout stays wet by taping a small square of clear plastic over it for 24 hours and watching for condensation on the inside. Re-caulk a shrinking joint at the tub rim with a product rated for continuous water exposure. Those checks cost you nothing and help us quote more accurately over the phone.
Do not open the wall or pull tile yourself if you suspect a waterproofing failure. You cannot see the full moisture path until the surface comes off, and in a bathroom, water travels sideways and down into framing before it shows up where you are looking. If there is any chance of mold, removing tile without proper containment can send spores into the rest of the house, which matters a lot in a home with kids or pets. We use containment, HEPA filtration where needed, and moisture meters to map the damage before we cut. Call (949) 850-9896 and we will walk you through what to look for before you touch anything.
FAQs
A properly installed Tamko waterproofing membrane should last 15 to 25 years, but hard water mineral buildup and Los Angeles temperature swings can shorten the life of surrounding grout and caulk to 5 to 10 years, which is why the seal details matter more than the membrane itself. Call (949) 850-9896 for an exact assessment, estimates are free.
Yes, we can repair a failed Tamko seam or corner without redoing the entire bathroom, but only when the moisture damage is localized and the framing is still sound; once wood softens or mold spreads, the waterproofing has to come out in that area. Call (949) 850-9896 and we will tell you honestly which situation you have.
A small seam or corner repair usually takes 2 to 4 days of work, including waterproofing cure time before tile goes back on; a full shower rebuild takes 5 to 10 working days depending on substrate damage. We schedule around nap time and school hours where possible, and quiet tools are part of the Cedarwell Care Promise.
We stock common Tamko-spec sealants, corner reinforcement, and fasteners on the truck, and order the membrane or trim per job so it arrives fresh and matched to your existing installation; OEM Tamko products usually arrive within 2 to 4 business days in Los Angeles. Call (949) 850-9896 and we will check availability for your specific product while you are on the phone.
Schedule Your Free Estimate
If you are seeing any of the signs above, or you simply want to know what a Tamko bathroom remodel would cost in your Los Angeles home, call us. You will get a live person, 24/7, not a voicemail box. We work with Tamko waterproofing and backer products, and our other named-brand partners include KraftMaid, Cambria, and Silestone, so whatever your bathroom needs, the materials are ones you can research by name. We will send a background-checked, uniformed technician to assess the condition, and you will have a written price before any work starts. Shoe covers and drop cloths are always part of the job, and we send you a photo of the cleanup before the crew leaves. Call (949) 850-9896 to schedule your free estimate.
Written by Graham Stein, Owner, Elmstead Remodeling at Elmstead Remodeling, serving Los Angeles and nearby areas.
