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Tamko Bathroom Remodeling: The San Antonio Owner’s Guide
Tamko bathroom remodeling in San Antonio typically runs $9,000 – $28,000 installed, depending on whether you’re replacing a single failed component or rebuilding the whole wet area. We keep Tamko-compatible waterproofing membranes, backer boards, and drainage components on hand for common failure points, and we can usually diagnose and quote a repair the same week you call. Most San Antonio homeowners discover a Tamko issue the hard way: a soft spot in the tile floor near the tub, water staining on the ceiling below an upstairs bath, or grout that keeps cracking no matter how many times it’s re-caulked.
Which Tamko Models This Applies To
Tamko is best known in Texas for roofing products, but their waterproofing membranes and underlayment materials show up in bathroom remodels across San Antonio, particularly in older homes where a previous contractor specified Tamko as a budget-conscious substrate. The compatibility question that trips up most homeowners is thickness: Tamko membranes used under tile in wet areas come in 40-mil and 60-mil rolls, and the 40-mil product is not rated for standing water contact in a shower pan. We see failures in Alamo Heights and Terrell Hills bathrooms where the thinner product was used to save money on a shower rebuild. If you have the original materials list from a prior remodel, check for the product code printed on the membrane edge. If you don’t, we can identify it by peeling back a small section during the estimate. For full bathroom remodeling in San Antonio, we also work with comparable products from Schluter and Laticrete when a Tamko part is discontinued or backordered, and we’ll write the substitution down before any work starts so you know exactly what’s going in.
Styles & brands we work with
Signs Your Tamko Bathroom Remodeling Is Failing
- Soft spots in the subfloor around the toilet or tub. This usually means the Tamko membrane was compromised at a seam or the toilet flange wasn’t sealed correctly, letting water reach the plywood underneath. By the time you feel the flex, the damage is already spreading.
- Water stains on the ceiling below the bathroom. A pinhole leak in a shower pan membrane can drip for months before paint blisters. Stains that grow after a rain indicate the problem is plumbing, not your Tamko layer, but steady yellowing in dry weather points to the wet-area waterproofing.
- Grout lines that crack repeatedly in the same spots. Tile on top of a membrane that’s delaminating will shift slightly with every step. Re-grouting fixes the symptom for a few weeks, but the movement comes back because the substrate below has lost its bond.
- A musty smell that won’t clear with cleaning. Water trapped between the tile and the membrane grows mold slowly. The smell is the first sign, and it’s often months or years before the tile itself shows damage.
- Tiles lifting or sounding hollow when tapped. A hollow sound means the tile has separated from the mortar bed, which usually traces back to moisture in the underlayment. This is the point where a repair becomes a partial rebuild.
See the difference
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After
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AfterReplacement Cost & What’s Included
A Tamko-related bathroom repair in San Antonio spans a wide range because the fix depends on how far the water traveled. A targeted repair replacing a failed membrane section and re-setting tile might land at the lower end of $4,500 – $8,500 for a shower replacement. A full bathroom remodel where we pull everything down to the studs, install new Tamko-compatible waterproofing, re-build the shower, and replace tile, vanity, and fixtures runs $9,000 – $28,000. What drives the difference: the size of the bathroom, whether the subfloor framing needs repair, whether you’re keeping the existing tub or converting to a walk-in shower ($3,500 – $10,000 for the conversion itself), and the tile choices. Every quote we write is a fixed number with parts, labor, and haul-away broken into separate line items. No allowance games, no “we’ll see what we find” pricing.
DIY or Call Us?
What you can safely check yourself: visible cracking in tile or grout, water stains on the ceiling below, soft spots you can feel through the flooring. Those observations help us quote faster. What you should not attempt: cutting out tile to inspect the membrane underneath. If the shower pan membrane is failing, the edges are under tension and the subfloor may be structurally weakened. Cutting into it without knowing where the drain flange sits can send water into the wall cavity and make a $6,000 repair into a $20,000 rebuild. We’ve done enough San Antonio bathroom extractions to know when a floor will hold and when it won’t. If you’re not sure, call (432) 233-0976 and we’ll come look before you touch anything.
FAQs
A Tamko wet-area membrane installed correctly should last 20 – 25 years in a San Antonio bathroom. The Texas heat and humidity cycles don’t affect the membrane itself, but they do accelerate grout and sealant breakdown, which is the entry point for the water that eventually reaches it.
Yes, sometimes. If the failure is isolated to a single seam or corner and we catch it before the subfloor absorbs moisture, a targeted repair may be sufficient to stop water before it does structural damage. Once the plywood below has swelled or rotted, the fix becomes a rebuild.
A localized membrane repair usually takes 2 – 3 working days including tile re-setting and re-grouting. A full bathroom remodel with waterproofing replacement runs 2 – 4 weeks depending on size and tile lead times. We’ll give you a written timeline before the first tool comes off the truck.
We carry Tamko-compatible 40-mil and 60-mil membrane rolls, seam tape, and drain flashing on our San Antonio service vehicles. If you need something outside standard inventory, we can usually have it in 2 – 3 business days through our local supplier network, and we’ll write the exact product and lead time into your estimate.
No. The written price we hand you before any work begins is the price you pay. If we open the wall and find additional damage, we stop, photograph it, explain what it means, and hand you an updated written line item before touching anything else. That’s the way Graham Stein has run every San Antonio job, and it’s why the quote you sign matches the invoice you pay.
Call (432) 233-0976 to schedule your free estimate for Tamko bathroom remodeling in San Antonio. We’ll walk the bathroom with you, name what failed, write down what it takes to fix it, and leave you a price before we leave the driveway.
Written by Graham Stein, Owner, Elmstead Remodeling San Antonio at Elmstead Remodeling San Antonio, serving San Antonio and nearby areas.
