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IKO Bathroom Remodeling: The Houston Owner’s Guide
If you have an IKO bathroom and water has started seeping where it shouldn’t, or the tile has begun lifting from the substrate, you’re likely looking at a waterproofing failure that needs correction before the damage spreads. Penhallow Remodeling Houston handles IKO-compatible bathroom remodels in Houston, with most full bathroom renovations running between $9,000 and $28,000 depending on shower size, material choices, and how far the water damage has traveled. We’re an independent service provider, not affiliated with IKO, but we work with their waterproofing systems and know exactly what goes wrong when a Houston bathroom starts failing at the seams.
Most homeowners discover the problem the same way: a soft spot on the floor outside the shower, mildew smell that won’t quit, or grout that keeps cracking no matter how many times it’s patched. By the time you see the tile move, the waterproofing layer underneath has usually been compromised for months. The good news is we’ve torn out and rebuilt enough of these in Houston to know what a proper fix looks like, and we put the price in writing before the first tile comes up.
Which IKO Models This Applies To
IKO manufactures waterproofing membranes and underlayments rather than complete shower systems, so their products typically sit behind the tile in a bathroom remodel, not as a standalone fixture you’d point to. The common finding in Houston bathrooms is IKO’s self-adhered membrane or sheet membrane installed as the moisture barrier over cement board substrate (the moisture-resistant layer behind your tile). Compatibility depends on which waterproofing system your original installer paired with the IKO membrane: most residential showers use either a bonded sheet membrane applied over mortar or a liquid-applied membrane with IKO fabric reinforcement at the seams and corners.
Here’s the gotcha we see again and again: IKO membranes are rated for specific thin-set mortar types. Using a modified thin-set where an unmodified one is called for, or vice versa, can prevent the membrane from bonding properly. “Unmodified” thin-set is pure cement-based mortar; “modified” means polymers were mixed in for extra grip. If your shower was built with the wrong one, the tile looks fine for a year or two, then starts sounding hollow when tapped.
Styles & brands we work with
Signs Your IKO Bathroom Remodeling Is Failing
- Hollow or drummy tiles: Tap a coin across the shower wall. A clean “tink” is fine. A dull “thud” means the tile has lost its bond. This is the earliest warning sign, usually before any visible cracking.
- Grout cracking in horizontal lines: When the substrate moves because moisture has softened the backer board, grout lines crack in long, straight runs rather than random spiderwebs. That pattern points to structural, not cosmetic, failure.
- Musty smell that returns after cleaning: Water is trapped behind the tile and the IKO membrane has been breached. In Houston humidity, that trapped moisture rarely dries on its own, so the smell comes back within days.
- Soft or dark spots at the shower pan corners: The pan is the most common failure point because corners are the hardest to seal correctly. If you see darkening at the junction of floor and wall, ignore it at your own risk.
- Water stains on the ceiling below a second-floor bathroom: By this stage the membrane and the pan have both failed and water is running freely into the framing. This is a full tear-out, not a patch job.
See the difference
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After
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AfterReplacement Cost & What’s Included
In Houston, a complete IKO-compatible bathroom rebuild runs $9,000 to $28,000 installed. That range covers tear-out of the failed tile and substrate, new waterproofing membrane, tile, shower pan, and trim. Where your number lands depends on a few things: is it a tub-to-shower conversion or a shower-for-shower swap? How many square feet of tile? Are we replacing the shower door or keeping the existing one? And the big one: how far has the water traveled into the subfloor and studs?
Every quote includes parts, labor, and the waterproofing system named line by line. We use trade-brand materials, including Kohler and Moen fixtures, alongside the IKO membrane or an approved equivalent. Our work carries a 365-Day Done Right Promise in writing: if something fails inside a year, we come back and fix it at no charge. You’ll know the exact number before we start, and that number won’t change unless you change the scope.
DIY or Call Us?
Here’s the honest answer: you can handle diagnosis yourself. Tap the tiles, check for soft spots, run the shower and look for weeping water at the pan. What you can’t do is patch a failed waterproofing membrane from the front. The only fix is removing the tile, cutting out the compromised membrane, and replacing it with proper seam overlap. I’ve watched homeowners try to caulk a cracked shower pan corner and call it done. Six weeks later the ceiling below is sagging and the repair is triple the cost it would have been. This is one of those cases where the free estimate saves you money, not costs you money.
If you’ve got water where it shouldn’t be, call us at (254) 527-5340 for a free estimate and a straight answer on whether it’s repairable without a full tear-out.
FAQs
A properly installed IKO membrane should last 20 years or more, but Houston’s humidity and hard water shorten that lifespan when installation was marginal. Give me the straight story on what you need, and I’ll give you the straight number on what it costs. If your shower is 8 to 10 years old and showing delamination signs, the membrane was likely the problem from day one, not a natural end of life failure. The tap test tells us a lot. Call (254) 527-5340 if you want an honest read on it.
Rarely. Small tears from screw penetrations can sometimes be patched with the right membrane overlap, but by the time homeowners notice symptoms, the water has usually been migrating behind the tile for months. The only way to know is to pull a section of tile and inspect what’s underneath. The repair estimate is free, and we’ll show you photos of what we find before we give you a number.
Three to four weeks is typical for a full tear-out and rebuild, depending on tile size and whether we’re changing the drain location. Houston permitting can add a week. Simple shower replacements with no plumbing changes can be done in about two weeks. We’ll give you a written schedule with your written price, so the day you sign is the day you know what’s happening.
We stock quality aftermarket membranes on the truck that are approved equivalents, and we can source IKO OEM products directly if you specifically want IKO for the rebuild. Most jobs don’t need OEM, because the replacement membrane just has to meet the mortar compatibility requirements for your tile. We’ll walk you through that decision with the price for each option side by side before you commit.
Written by Trevor Nash, Owner, Penhallow Remodeling Houston at Penhallow Remodeling Houston, serving Houston and nearby areas.
If your IKO bathroom is showing signs of failure anywhere in Houston, from Meyerland to The Heights, call (254) 527-5340 for a free estimate. A live person answers, you’ll get a written price before any work starts, and every job carries our 365-Day Done Right Promise in writing.
