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Tamko Bathroom Remodeling: The San Antonio Owner’s Guide
A full Tamko bathroom remodel in San Antonio typically runs $9,000 to $28,000 installed, with most projects landing between $12,000 and $18,000 depending on the size of the wet area, whether you’re moving plumbing, and which Tamko product lines you’re matching or replacing. We stock Tamko-compatible components on our trucks and can usually have a crew out within a few days to assess your bathroom, verify what’s failing, and give you a written price before any work starts. Most San Antonio homeowners call us because they’ve spotted water staining at the base of a Tamko tub or shower surround, cracked grout lines around a Tamko tile installation, or a vanity that’s starting to pull away from the wall after years of humidity cycling.
Which Tamko Models This Applies To
Tamko is better known in San Antonio for roofing and waterproofing products, but many homes across the city have Tamko moisture barriers, waterproof membranes, and underlayments layered beneath their bathroom tile, tub surrounds, and shower pans. If you’re looking at a bathroom remodel that involves a Tamko waterproofing layer, the first question is which generation you have. Older Tamko membranes used a peel-and-stick asphalt base, while newer installations typically feature a modified bitumen or sheet membrane rated for continuous water exposure. The compatibility issue that catches people off guard: you cannot mix Tamko’s asphalt-based membrane with certain solvent-based tile adhesives without risking bond failure. If you pull up a corner of the old membrane and it’s sticky with black residue, that’s the asphalt-generation product, and it needs a specific transition detail before new tile goes down.
We recommend staying with Tamko-compatible materials when we’re tying new waterproofing into an existing Tamko system. Aftermarket equivalents exist, but matching a different membrane brand to a Tamko one is where we see callbacks happen. If the original is too far gone to patch, we’ll quote you a full replacement with either a Tamko product or an equivalent we can warranty alongside our own 365-day guarantee. Isaac Pruett has pulled apart enough failed San Antonio shower pans to know that mixing membrane families is a shortcut that costs more later.
Styles & brands we work with
Signs Your Tamko Bathroom Remodeling Is Failing
- Water staining on the ceiling below the bathroom. This is almost always a shower pan or tub surround leak, not a plumbing supply line. Slow, persistent drips through a failed Tamko membrane will show up as light brown rings that grow over time.
- Loose or hollow-sounding tile near the shower floor. When the waterproofing layer breaks down, the thinset loses its bond from moisture getting trapped underneath. Tap the tile with a screwdriver handle. A dull thud means it’s detaching.
- Musty smell that doesn’t go away after cleaning. Water is sitting somewhere it shouldn’t. In San Antonio’s heat, that trapped moisture turns into mold inside the wall cavity within weeks, not months.
- Grout cracking or crumbling in a pattern that follows the floor slope. A shifting subfloor under a Tamko membrane will telegraph stress cracks straight through the tile. This is structural, not cosmetic.
- Baseboards or drywall swelling at the bottom near the tub or shower. Capillary action pulls water up from a leaking pan edge, and the drywall will start to bubble or crumble even if you never see standing water.
See the difference
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After
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AfterReplacement Cost & What’s Included
Here’s the honest math for San Antonio. A small bathroom remodel with a Tamko membrane replacement, new tile around the tub, and a rebuilt shower pan runs $5,000 to $12,000. A full bathroom remodel that includes stripping to the studs, replacing the Tamko waterproofing system, moving fixtures, new vanity and flooring runs $9,000 to $28,000. What drives the range: whether we’re repairing a section of membrane or replacing the whole system, whether the subfloor under the shower is rotted and needs new plywood, and whether your existing drain location needs to move. You’ll get a written line-item price before we start. Our work is covered by the 365-Day Done Right Promise, which means if something’s not right within a year of completion, we fix it at no cost to you.
DIY or Call Us?
What you can safely check yourself: look for visible water staining around the tub base, run the shower for five minutes and watch for water beading where it shouldn’t, and feel for soft drywall near the floor. That’s diagnostic, not dangerous. What you should not do is pull up tile or cut into a Tamko membrane to “see what’s going on underneath.” Once you break the waterproofing layer, you’ve turned a contained problem into an open leak, and mold exposure in an enclosed wall cavity is a real health risk. If the membrane has failed, partial DIY fixes almost always fail again within a year because the bond between old and new waterproofing is the weakest point. Call us at (254) 269-5071 and we’ll come out, identify exactly what’s failing, and give you a written price before you commit to anything.
FAQs
A properly installed Tamko membrane under a bathroom should last 20 to 30 years, but San Antonio’s heat and humidity swings shorten that lifespan when the membrane wasn’t correctly detailed around the drain flange or wall junctions. If yours is failing before year 15, it’s almost always an installation issue, not a product issue. Call (254) 269-5071 for an exact assessment and replacement quote.
Yes, if the failure is localized to one seam or drain area and the surrounding membrane is still bonded and watertight. A patch repair runs significantly less than a full replacement, and we’ll tell you honestly which one your situation calls for. Call (254) 269-5071 for a free estimate either way.
A tub surround or shower pan membrane replacement typically takes 3 to 5 working days from demo to tile and grout. A full bathroom remodel with the membrane replacement, new fixtures, and finishes usually takes 2 to 3 weeks. We’ll give you a schedule in writing before we start, and Isaac Pruett’s crew works the scope of work as written so the timeline doesn’t drift.
We keep Tamko-compatible membranes, transition detailing materials, and the associated tile installation products on our trucks and in our local inventory. For specialty Tamko orders, we can have product within a few days through our supplier network, which includes specification-grade material lines like KraftMaid, Cambria, and Silestone for the finish work. Call (254) 269-5071 and we’ll verify what we have on hand for your specific job.
Know who’s coming, know what it costs, know it’s covered – that’s the whole job before the job starts. Call us at (254) 269-5071 and we’ll give you a written price for your Tamko bathroom remodel in San Antonio. No surprises on the invoice, no crew you haven’t met by name and photo before they walk through your door.
Written by Isaac Pruett, Owner, Mason Remodeling Co San Antonio at Mason Remodeling Co San Antonio, serving San Antonio and nearby areas.
