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Tamko Bathroom Remodeling: The Houston Owner’s Guide
A Tamko bathroom remodel in Houston typically runs $9,000 to $28,000 installed, depending on the size of the space, the condition of the existing framing and plumbing, and which Tamko waterproofing and backer board products the job requires. Most Tamko-related bathroom failures we see are not the product itself but what happened around it: a failed seam, an improperly sloped shower pan, a corner that was never sealed. Homeowners usually discover the problem as a soft spot in the floor outside the shower, a musty smell that will not go away, or grout that stays dark no matter how many times it is scrubbed. When we open the wall, the Tamko membrane is often fine. The framing behind it is the casualty.
What that means for you: this is rarely a simple part swap. It is a removal, a moisture assessment, a rebuild, and a re-waterproofing job using materials matched to what is already there. We stock Tamko-compatible backer board, flashing, and sealant on the truck for most standard Houston residential installations, and we can have less common Tamko profiles from our local supplier within one business day.
Key takeaways:
- Tamko bathroom failure is usually a waterproofing seam or slope issue, not a material defect.
- Full Tamko bath remodel in Houston: $9,000 – $28,000 installed, with a written price before any work starts.
- We carry Tamko-compatible membranes, sealant, and backer board for standard installations.
- Elmstead Remodeling Houston is an independent contractor, not affiliated with Tamko. We install and repair around their products every week.
Which Tamko Models This Applies To
Tamko makes several waterproofing product lines used in Houston bathrooms, and compatibility depends on which one was originally installed. The most common in local homes are the TAMKO TW-60 and TW-40 self-adhering waterproofing membranes, used as shower wall and tub surround underlayments. You will also see Tamko ProLine backer board, which comes in 1/2-inch and 1/4-inch thicknesses, and Tamko flashing tape used at tub flanges and shower curbs.
If you are unsure which Tamko product is behind your tile, check the exposed edges at the shower valve or the tub spout. Sometimes the printed logo is visible there. If it is not, we measure the backer board thickness through the escutcheon gap and match the membrane type by the adhesive carrier: the TW-60 has a yellow film, the TW-40 is grey. That distinction matters, because the two membranes have different vapor transmission ratings and should not be mixed on the same wall plane. An aftermarket membrane can work, but only if it matches the original perm rating and overlaps correctly at every seam. For Tamko specifically, we have found the factory product is the safer call when repairing a partial failure, because the adhesive chemistry is matched. For full gut remodels, we present both options with the price difference in writing.
Graham Stein has seen enough variations across Houston homes, from 1960s ranch bathrooms in Meyerland to newer builds in Katy, to know that guessing at product compatibility is how you end up doing the same wall twice. We do not guess.
Styles & brands we work with
Signs Your Tamko Bathroom Remodeling Is Failing
- Grout that stays wet or dark after 48 hours. Water is trapped behind the tile, meaning the Tamko membrane is not draining or the weep holes in the drain assembly are blocked. The grout itself is rarely the cause.
- A soft spot in the floor outside the shower. This is the classic sign of a shower pan membrane leak at the curb or corner. Water travels under the tile, rots the subfloor, and shows up where you stand to dry off.
- Musty smell that moves with the seasons. Houston humidity hides this one. In summer the smell spikes, in dry winter weeks it fades. That means moisture is trapped in a wall cavity, and the Tamko membrane was likely pierced or improperly lapped.
- Tiles that sound hollow when tapped. The bond between tile, thinset, and backer board has failed in sections. Water got behind the tile and is working on the adhesive. In a properly waterproofed Tamko installation, hollow tiles are rare.
- Failing caulk at the tub flange or shower curb that keeps reappearing. When caulk fails repeatedly in the same spot, it is not a caulk problem. It is movement or moisture behind the joint, usually from a poorly sealed Tamko transition.
See the difference
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After
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AfterReplacement Cost & What’s Included
In Houston, a Tamko-focused bathroom remodel runs $9,000 to $28,000, and the spread comes down to three things: how much tile has to come out to reach the failing area, whether the subfloor or wall framing is compromised, and how much of the original Tamko membrane can be salvaged versus fully replaced. A small shower-only repair with tile match and re-seal might sit at the lower end if the framing is sound. A full bathroom gut and rebuild with a new Tamko waterproofing system, new pan, new tile work, and a new vanity lands at the higher end.
Here is what the installed price includes when you work with us:
- Demolition and disposal of the failed area, with drop cloths and shoe covers down before we start cutting.
- Moisture assessment of the framing and subfloor, with a written plan for any rot replacement we find.
- Tamko waterproofing membrane or backer board matched to the original installation, or a written recommendation if switching the system makes more sense.
- Labor, fasteners, sealant, thin-set, grout, and tile setting to match surrounding work where possible.
- A written price before any work starts, and a photo of the clean-up before the crew leaves.
Every completed project carries our 365-Day Done Right Promise: if it is not done right, we make it right. That is not a line item. It is the standard.
DIY or Call Us?
There is a version of this job an owner can do, and a version they should never attempt. What you can safely do yourself: remove and inspect the shower trim plate, test the escutcheon seals, re-caulk a clean, dry joint with a silicone rated for continuous water exposure, and check that your exhaust fan actually vents outside rather than into the attic. None of that requires touching the waterproofing layer.
What you should not DIY: pulling tile off a Tamko membrane, cutting into backer board, re-sloping a shower pan, or re-lapping membrane at a curb or flange. Once the waterproofing layer is broken or improperly patched, water moves through the wall cavity silently. By the time the floor outside the shower softens, you are looking at subfloor replacement, not a caulk fix. If you are seeing any of the signs above, call us at (254) 272-5240. We will walk the job with you, give you a written price, and tell you honestly whether it is a repair or a rebuild. A written price and a covered floor before any work begins, that is where the trust starts.
FAQs
A correctly installed Tamko membrane in a Houston bathroom should outlast the tile work on top of it, typically 15 to 25 years before the first seam or corner begins to fail. The limiting factor here is rarely the Tamko material. It is Houston’s humidity cycling against improprly sloped pans and movement in pier-and-beam framing, which stresses the membrane joints over time. We also stock compatible parts for KraftMaid vanities, Cambria countertops, and Silestone surfaces if the remodel scope expands beyond the wet area.
Yes, if the failure is a single seam or corner and the surrounding membrane is still bonded well to the backer board. We can open that section, clean the lap, re-apply a matched Tamko patch, and re-tile the patch area. If the failure is at the shower pan or the membrane has delaminated across a broad area, a full replacement of that wet-wall section is usually the more durable choice. Call (254) 272-5240 for an honest assessment, not a hard sell.
A single-seam repair with tile match can be done in one to two days, including dry time for the sealant. A full shower rebuild with new Tamko waterproofing typically runs five to seven working days. A complete bathroom remodel is usually two to three weeks, depending on tile work, vanity installation, and any plumbing relocations. We schedule quiet-tool work during nap and school hours where the family needs it.
We keep Tamko TW-60 and TW-40 membrane, flashing tape, and 1/2-inch ProLine backer board on the truck for standard Houston installations. Less common profiles and accessories we can source from our local Houston supplier within one business day. You will get a written price for parts and labor before we begin, so there is no surprise line item after the wall is open.
If your Tamko bathroom is showing signs of moisture trouble, call us at (254) 272-5240 to schedule a free estimate. We will come out, assess the damage, and give you a written price before any work starts.
Written by Graham Stein, Owner, Elmstead Remodeling Houston at Elmstead Remodeling Houston, serving Houston and nearby areas.
