Free written scope consultation - allowances, timeline, and change-order rules on paper before a single trade is scheduled
Tamko Bathroom Remodeling: The Houston Owner’s Guide
If you have a Tamko product in your bathroom that needs repair or replacement as part of a larger remodel, you’re likely looking at a full bathroom renovation that runs $9,000 – $28,000 in Houston, depending on scope, materials, and what’s hiding behind the walls. Most owners discover a failed Tamko component the hard way: water staining on the ceiling below, a soft spot in the subfloor, or tile that’s started to pull away from the wall. The good news is that if the underlying Tamko material has failed, you’re not looking at a patch job, you’re looking at a proper remodel, and that’s exactly what we do at Penhallow Remodeling Houston. Trevor Nash and our crew have torn out enough failed bathroom components in Houston to tell you this plainly: a failed waterproofing layer or backing board rarely fails alone, and the fix is usually a full section replacement, not a caulk-and-paint coverup.
Which Tamko Models This Applies To
Tamko’s product line in bathrooms typically refers to their waterproofing and moisture-barrier products, most commonly their roofing underlayments that contractors occasionally use as secondary moisture barriers, or their composite decking and waterproofing membranes that show up in shower pan and wet-area applications. The critical compatibility detail that matters here is thickness and adhesion surface: Tamko moisture-barrier products are designed for specific substrate pairings, and Houston’s humidity means a membrane that works in a dry climate can fail prematurely here if it’s not paired with the right cement board substrate (the moisture-resistant layer behind your tile).
If you’re not sure what Tamko product is actually in your bathroom, look for a product code on the exposed edge near the shower pan or on any leftover material from the original installation. The label matters because a Tamko peel-and-stick membrane is not interchangeable with a Tamko self-adhered flashing product, even though they look similar on the roll. For a remodel, we typically recommend replacing failed Tamko material with a purpose-built tile backer and waterproofing system that’s rated for continuous wet-area exposure, not just intermittent contact. We can match what’s there if you want to stay with the same brand approach, but we’ll also be straight with you about whether that’s the best call for a Houston bathroom that sees real humidity swings.
Styles & brands we work with
Signs Your Tamko Bathroom Remodeling Is Failing
- Tile that sounds hollow when tapped: The adhesive bond between the tile and substrate has broken, which almost always traces back to moisture getting behind the tile. In Houston, the humidity cycle of hot, wet summers and dry winters accelerates this. Once tile delaminates from a failed underlayment, the seam is open for water and the problem compounds quickly.
- Persistent musty smell that cleaning won’t touch: That odor means water is sitting somewhere it shouldn’t be, often behind a shower wall or under the pan. The Tamko membrane, if it’s the failing component, has likely developed a pinhole or seam separation. Smell is the first warning sign, and it’s months ahead of visible staining in most cases.
- Discoloration or soft spots on the bathroom floor: Spongy subfloor around the toilet or tub means the moisture barrier has been compromised long enough for the wood to rot. By the time you feel a soft spot, the water has been working for a while, typically in the area of the Meyerland neighborhood’s clay-heavy soil shifting, which adds stress to plumbing connections and pan seals over time.
- Caulk that cracks within weeks of reapplication: If you’ve recaulked the shower or tub surround and the new bead cracks or separates in under a month, the surface behind it is moving. That movement, whether from substrate swelling or framing shifts, is exactly the kind of stress that overwhelms a moisture barrier designed for a stable wall.
- Water stains on the ceiling below the bathroom: This is the one everyone catches eventually. The stain means water has already traveled through the failed barrier, into the subfloor, and out through the ceiling below. By this point, what was a membrane replacement has become a subfloor repair, and that’s the difference between a small job and a full bathroom remodel in Houston.
See the difference
Before
After
Before
After
Before
AfterReplacement Cost & What’s Included
A full bathroom remodel in Houston that addresses failed Tamko material and brings everything back to a clean, dry, properly waterproofed room typically runs $9,000 – $28,000. Where you land in that range depends on three things: the size of the bathroom, what’s behind the walls once we open it up, and the finishes you choose for the rebuild.
A smaller hall bath with a standard tub surround and a limited tile footprint sits at the lower end. A primary bath with a walk-in shower, custom vanity, and larger floor area climbs toward the top. Every Penhallow Remodeling Houston quote includes the tear-out, disposal, substrate replacement, waterproofing, materials, installation, and finishing, and we hand you a written price before any work starts. The number on day one is the number on the invoice. Plus, every job carries our 365-Day Done Right Promise: if it’s not done right, we make it right, in writing, at no charge to you.
What Drives the Price Up or Down
- Rot repair: If the subfloor or wall studs have to come out, that’s additional framing labor and material. This is common in Houston bathrooms where a leak went undetected for a season.
- Tile vs. acrylic surround: Tile is more expensive to install but lasts longer when the waterproofing behind it is correct. Acrylic surrounds are faster and cheaper but offer fewer design options.
- Vanity and countertop choices: A stock vanity from a big-box store costs less than a KraftMaid cabinet with Cambria or Silestone quartz top. We install both, and we line-item the difference so you can decide with real numbers.
- Plumbing changes: Moving a drain or supply line costs more than keeping the existing layout. If the shower valve isn’t where you want it, that’s a real cost, and we’ll tell you exactly what it adds before you commit.
DIY or Call Us?
Here’s the honest split. If you have a failed Tamko or other membrane product, the inspectable parts are limited to what you can see without opening the wall: checking for visible cracks, peeling caulk, staining, or a shower pan that flexes underfoot. You can run the shower and check the ceiling below for new water. That’s the safe, useful work.
Where DIY goes wrong is when someone tries to patch a failed waterproofing membrane from the surface. You cannot fix a compromised barrier with caulk, sealant spray, or another layer on top. The water is already behind it, and covering the surface just traps it. Tamko products and similar membranes require the old surface to come off, the substrate to be inspected and replaced as needed, and a new waterproofing system installed correctly. That’s not a weekend caulking project. That’s a remodel, and the plumbing and framing work involved is why we recommend calling a trained professional. Call (254) 527-5340 and we’ll come look at it. The estimate is free, and the price we give you is the price you’ll pay.
FAQs
In Houston’s humidity, a quality waterproofing membrane under good installation should last 15 to 25 years, but the high moisture exposure in a shower area means the first failure point is usually a seam or transition. Houston’s soil movement near areas like Meyerland adds another variable over time, shifting walls and stressing waterproofing at the pan edge. If your bathroom is past the 20-year mark, you’re on borrowed time.
Once a Tamko membrane or similar waterproofing barrier has failed, the honest answer is no; the only reliable fix is to remove the tile or surround, replace the failed membrane section, and reinstall over a sound substrate. Patching from the surface just moves the problem around and gives water a new place to collect. Call (254) 527-5340 and we’ll confirm what’s actually failing before you spend a dollar on any repair.
A standard hall bath remodel in Houston runs about 3 to 4 weeks from tear-out to finish. A primary bath with a walk-in shower, custom vanity, and tile work runs 5 to 7 weeks. We give you a defined arrival window before the job starts and we keep to it.
We stock the common compatible replacement materials on our trucks: cement board, waterproofing membrane, shower pan liners, and the fasteners and sealants that go with them. If your remodel calls for a specific Tamko product, we’ll order it and bring it on the scheduled start day. For fixtures and finishes, we source from Kohler, Moen, Delta, Toto, and Grohe; for vanities and tops, KraftMaid, Cambria, and Silestone. The brands behind the guarantee are as solid as the promise itself.
Written by Trevor Nash, Owner, Penhallow Remodeling Houston at Penhallow Remodeling Houston, serving Houston and nearby areas.
