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Tamko Bathroom Remodeling: The San Jose Owner’s Guide
Tamko bathroom remodeling in San Jose typically runs $10,620 to $33,040 depending on whether you’re replacing a single failed component or gutting the room to the studs. The smaller, part-specific work like swapping a failed shower pan, repairing a leaking membrane, or replacing tile over damaged backer board usually lands in the $5,900 to $14,160 range. Most San Jose homeowners discover a Tamko problem the hard way: a soft spot in the floor near the tub, water staining on the ceiling below, or grout that keeps cracking no matter how many times it’s re-caulked. Those are rarely surface issues. They’re the symptom of a waterproofing layer or substrate that has already failed underneath.
We’re an independent San Jose remodeling contractor, not affiliated with Tamko, but we work with Tamko products regularly and understand their specs, their failure points, and what it takes to match the repair to the original install. Trevor Nash has pulled apart enough failed shower enclosures in Willow Glen and Rose Garden to know exactly where Tamko installations usually let go first.
Which Tamko Models This Applies To
Tamko makes roofing and waterproofing products, and in the bathroom context that almost always means one of their membrane or underlayment lines sitting beneath your tile. The compatibility gotcha most homeowners miss: Tamko’s EverGuard and Aquadam lines come in different thicknesses and adhesion requirements, and the wrong replacement layer will telegraph through the tile or fail to bond with the thinset. When we open up a failed Tamko installation in San Jose, the first thing we check is whether the original installer matched the membrane to the substrate, because mismatched layers are the most common root cause we find.
If you still have the product label or packaging, keep it. The roll code tells us the exact product line and production batch. If you don’t, we measure the remaining membrane thickness and check the bonding surface. For most residential San Jose bathrooms, an OEM Tamko membrane or a quality aftermarket equivalent from a recognized trade brand will both work, but the aftermarket route saves money without sacrificing performance when it’s matched correctly. We stock several Tamko-compatible membranes on our trucks, so we can usually start the repair the same day we diagnose it.
Styles & brands we work with
Signs Your Tamko Bathroom Remodeling Is Failing
- Spongy floor near the tub or shower base. The substrate has absorbed water and is delaminating. This usually means the Tamko membrane underneath has torn or was never properly sealed at the corners.
- Water stains on the ceiling below the bathroom. Water is finding a path through the membrane. Grout and caulk are not waterproofing layers, so a stain means the membrane itself is compromised.
- Cracked grout that returns within months of repair. The substrate is flexing because moisture has weakened it. Re-grouting fixes the surface but not the movement underneath.
- Peeling paint or bubbling drywall near the shower. Humidity and water vapor are escaping through a failed vapor barrier or membrane edge. This often shows up in San Jose bathrooms without proper exhaust ventilation.
- Musty smell you can’t locate. Mold is growing in a cavity you can’t see. The water has been sitting for a while, and by the time you smell it, the repair scope has grown.
See the difference
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After
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After
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AfterReplacement Cost & What’s Included
A full bathroom remodel with Tamko-compatible waterproofing in San Jose typically runs $10,620 to $33,040. A smaller repair, like replacing a failed shower pan and the membrane beneath it, lands in the $5,900 to $14,160 range. What drives the number up or down? Square footage of tile, whether the damage reached the framing, the condition of the existing substrate, and whether you’re keeping the existing layout or moving fixtures.
Every Penhallow Remodeling San Jose quote is a written number before any work starts. Not a range, not a verbal ballpark. The price on day one is the price on the invoice. That includes the parts, the labor, the tear-out, the disposal, and the written 365-Day Done Right Promise. If anything fails inside that year, we come back and fix it at no charge. We also pull permits when the scope requires them, and we pass every inspection before we call the job done.
DIY or Call Us?
There’s one thing you can safely check yourself: whether the caulk lines and grout are visibly cracked, and whether the flooring flexes when you step near the shower. That tells you the problem is real. What you shouldn’t do is start pulling tile to “take a look.” Once you open a shower enclosure, you’ve exposed the waterproofing layer, and a partial tear-out left overnight can turn a repair into a full replacement. Water moves fast once it finds a path.
If the damage is caught early, a membrane patch or a shower pan replacement is a one or two day job for us. If you’re unsure what you’re looking at, call (669) 274-2362 and describe what you see. We’ll tell you honestly whether it needs a technician on site or whether it can wait. Give me the real problem and I’ll give you the real number.
FAQs
A properly installed Tamko bathroom membrane lasts 20 to 30 years in San Jose’s climate, but our dry summers and occasional wet winters mean expansion and contraction cycles put real stress on corner seals. The corners are where we see the first failures in about 80% of the Tamko jobs we open up.
Yes, if the damage is localized and the surrounding substrate is still solid. We cut back to dry material, patch the membrane with a Tamko-compatible product, and retile that section. If the water has spread under a large area of tile, replacement is the honest fix. Call (669) 274-2362 and we’ll tell you which situation you’re in after one look.
A shower pan and membrane replacement takes one to two days for most San Jose bathrooms. A full remodel runs one to three weeks depending on tile, fixtures, and whether we’re moving plumbing. We give you a written schedule with your written price, and we show up in the window we said we would.
We stock Tamko-compatible membranes and the common substrates on our trucks, so most repairs start the same day we diagnose the problem. For full remodels, we also work with KraftMaid, Cambria, and Silestone for the finish materials. If a specialty part needs ordering, we handle that and factor the lead time into your written schedule.
Written by Trevor Nash, Owner, Penhallow Remodeling San Jose at Penhallow Remodeling San Jose, serving San Jose and nearby areas.
