Tamko Bathroom Remodeling: The South Florida Owner’s Guide
Groundwork Construction Co. of South Florida installs Tamko-compatible bathroom remodeling systems in the $9,000-$28,000 range depending on scope, with most projects designed and started within two weeks. We stock Tamko moisture-resistant underlayments, waterproofing membranes, and flashing components that hold up against South Florida’s driving rains and salt-laden humidity. Most homeowners realize something’s wrong when grout cracks appear near the shower pan, baseboards swell in the hallway outside the bathroom, or a musty smell persists no matter how often they clean.
Which Tamko Models This Applies To
Tamko doesn’t manufacture bathroom fixtures like vanities or tubs. What they make matters just as much for a lasting remodel: the moisture barrier systems, waterproof underlayments, and flashing that keep water from destroying your walls and subfloor. We work with Tamko’s TW Metal and TW Tile underlayment lines, plus their Proline waterproofing membranes. The critical spec to check is your existing underlayment thickness: TW Metal comes in 30 mil and 40 mil weights, and matching the wrong gauge to your tile or stone load creates flex that cracks grout within 18 months in South Florida’s heat cycles.
Look for the Tamko stamp on the exposed edge of your shower pan liner or the paper backing on wall underlayment. If you’re down to the studs, measure the mil thickness with a simple gauge; 40 mil is standard for second-story bathrooms in Coral Gables and Pinecrest where tile weight runs heavier. OEM Tamko parts integrate cleanly with their own flashing profiles. Aftermarket equivalents exist from Schluter and Laticrete, but the transition details at curb and niche corners often need custom fabrication that adds labor cost. We carry both on our trucks and will show you the seam difference before we cut anything.
Signs Your Tamko Bathroom Remodeling Is Failing
- Soft drywall near the base of exterior walls. Tamko’s flashing tape separates from the substrate when installers skip the manufacturer’s primer in humid conditions. The gap lets shower spray migrate behind tile and wick into studs. We’ve found this exact failure pattern in six Aventura condos built between 2015 and 2019.
- Grout cracking in a spiderweb pattern. This signals underlayment flex, usually from a 30 mil Tamko layer installed where 40 mil was spec’d for large-format tile. The material itself hasn’t failed; it was underspecified for the load.
- Musty odor that returns after cleaning. Tamko’s Proline membrane is vapor-permeable by design, but if the seams weren’t heat-welded per spec, liquid water pools in the cavity. South Florida’s year-round humidity prevents natural drying.
- Tile popping loose near the shower curb. The curb is a high-stress joint. Tamko’s preformed curb flashings speed installation, but if the original contractor folded generic L-metal instead, corrosion starts at the salt-air interface within three years.
- Visible staining on ceiling below the bathroom. This means water has breached every layer. The Tamko membrane may be intact but punctured at a fastener point, or the weep holes in the clamping drain were blocked during original construction.
Replacement Cost & What’s Included
A full Tamko bathroom remodel in South Florida runs $9,000-$28,000, with small bathrooms starting around $5,000 and walk-in shower conversions landing at $3,500-$10,000. The spread depends on three factors: how far we strip back (surface retile versus down-to-studs), whether we match existing Tamko components or upgrade the full waterproofing stack, and your finish selections from our 50+ brand partnerships including KraftMaid cabinetry and Cambria, Silestone, or Caesarstone countertops.
Our quotes break out parts and labor separately. Tamko underlayment and membrane materials typically represent 12-18% of the total. We don’t markup parts; you see our distributor invoice. Labor includes demolition, substrate prep, installation per Tamko’s current technical bulletin, flood testing for 24 hours before tile goes on, and haul-away. Every bathroom we build carries a workmanship warranty, and Tamko’s material warranty runs 10 years on Proline when registered by the installing contractor.
| Component | Typical Range (Installed) |
|---|---|
| Full bathroom remodel | $9,000 - $28,000 |
| Small bathroom remodel | $5,000 - $12,000 |
| Walk-in shower installation | $4,500 - $12,000 |
| Tub-to-shower conversion | $3,500 - $10,000 |
| Shower replacement | $3,000 - $8,500 |
| Bathroom vanity installation | $800 - $3,000 |
DIY or Call Us?
There’s a safe middle ground before you decide. Homeowners can verify the Tamko stamp on existing underlayment, check for obvious fastener pops or seam gaps, and confirm drain flow with a five-gallon bucket test. What you shouldn’t attempt: cutting into a shower pan to expose the membrane, heat-welding seams (the gun runs at 600°F and scorches PVC pipe behind the wall), or reinstalling a clamping drain without knowing your local plumbing code for weep hole protection.
We’ve been called into too many South Florida bathrooms where the DIY membrane replacement looked fine for six months, then delaminated in a corner because the substrate moisture content was 18% when Tamko specs 12% maximum. Do it right the first time or you’ll do it twice - and the second time always costs more. If you’re seeing any of the five symptoms above, call (844) 665-0162 and we’ll diagnose it without charge.
FAQs
Properly installed Tamko Proline membranes last 20-25 years in South Florida’s climate, though salt-air exposure within a mile of the coast can shorten flashing lifespan to 12-15 years. The membrane itself doesn’t degrade; failure almost always happens at seams, penetrations, or where incompatible sealants were used. Call (844) 665-0162 for an inspection if you’re past year 10 - estimates are free.
Patching works only if the damage is isolated to a seam or small puncture and the surrounding membrane tests dry. We use Tamko’s compatible patch kits with heat-welded borders, but if the substrate behind is wet, the patch traps moisture and accelerates rot. Most South Florida bathrooms we see need more than surface repair because humidity has already compromised the wall cavity. We’ll give you an honest assessment - call (844) 665-0162.
A down-to-studs remodel with new Tamko waterproofing, tile, and fixtures typically takes 10-14 working days in South Florida, plus three days for flood testing and cure times. Material availability for your chosen finishes affects this more than our labor schedule. We coordinate every trade internally - one contractor, every phase - so you’re not waiting between plumber and tiler.
We stock 30 mil and 40 mil Tamko underlayment, Proline membrane rolls, preformed curb and niche flashings, and compatible sealants on every bathroom remodel truck. For specialty orders like TW Tile for steam shower applications, our distributor in Miami-Dade delivers within 48 hours. We don’t make you wait while parts ship from out of state.
Groundwork Construction Co. of South Florida is an independent service provider and is not affiliated with Tamko. We work with Tamko materials among our 50+ brand partnerships because they perform in our climate, and you choose the brand - we handle the build.
Ready to stop guessing about what’s failing behind your tile? Call (844) 665-0162 for a free estimate. We’ll walk your bathroom, show you exactly what we find, and build to spec, not to convenience.
Written by Raymond Estevez, Owner & General Contractor, Groundwork Construction Co. of South Florida at Groundwork Construction Co. of South Florida, serving South Florida and nearby areas.