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Schluter Home Additions & ADU: The Woodland Hills Owner’s Guide
A full home addition or ADU built around Schluter waterproofing systems in Woodland Hills typically runs $45,000 to $130,000 installed, depending on square footage, foundation work, and whether we’re tying into existing plumbing or running new lines. Most owners call us when a Schluter component fails mid-project or when an existing addition shows water damage at the seams: cracked Kerdi membrane, failing Ditra underlayment, or edge trim lifting where tile meets the floor. We stock the common Schluter profiles and membranes on our trucks, so a failed part rarely means a dead stop on your project.
You’ll find Sawyer Remodel jobs throughout the West Valley, from Warner Center out to the hillside streets above Topanga Canyon Boulevard. We’re an independent contractor, not affiliated with Schluter, but we’ve built and repaired enough Schluter-system additions to know exactly what fails and why in this climate – and what it costs to make it right.
Key Takeaways:
- Installed Schluter home addition or ADU pricing in Woodland Hills: $45,000 – $130,000
- We stock common Schluter Kerdi, Ditra, and edge-trim profiles on the truck
- Every project gets a written price before work starts, per The Relay Visibility Guarantee
- 365-Day Done Right Promise covers the work for a full year after close-out
- Call (341) 217-2776 for a free estimate
Which Schluter Models This Applies To
Schluter’s product lines are not interchangeable, and that’s where we see the most expensive mistakes. Kerdi-Board is the rigid foam backer used for shower walls and sometimes exterior sheathing on Woodland Hills ADUs. Ditra and Ditra-Heat are the uncoupling membranes that go under tile floors. Kerdi-Band is the waterproofing strip that bridges seams and corners. Profiles – the metal edge trim – come in dozens of series names like Schiene, Jolly, Rondec, and Quadec. A Jolly is not a Rondec, and installing the wrong profile means the tile edge is unprotected and water gets behind your work.
The part you need depends on what failed. If water is coming through the floor of a second-story addition, that’s a Ditra or Kerdi-Band issue. If the edge of your tile is chipping or the metal strip is pulling away, that’s a profile failure, usually because the wrong profile was used for the tile thickness. Most Schluter parts are stamped with the series name on the flange. If you can’t read the stamp, measure the tile thickness and the profile height in millimeters – that tells us what to bring.
For Schluter-specific work, we stick with genuine Schluter parts. The aftermarket profiles may look identical, but the aluminum gauge and the anchoring leg dimensions are built to Schluter’s tolerance for a reason. We’ve pulled cheap off-brand edge trim off jobs in Woodland Hills that failed within two years. The savings aren’t worth it on a $45,000+ addition.
Styles & brands we work with
Signs Your Schluter Home Additions & ADU Is Failing
- Water stains on the ceiling below a bathroom or kitchen addition. This almost always traces back to a failed Kerdi-Band seam or a puncture in the Kerdi membrane. In Woodland Hills, the summer-to-winter temperature swing causes expansion and contraction that stresses those seams over time.
- Loose or hollow-sounding tile. When Ditra loses its bond to the substrate, tiles sound hollow when you tap them. It usually starts at the edges and moves inward. Left alone, grout lines crack and the tile starts popping.
- Metal edge trim lifting away from the tile. The profile’s anchoring leg wasn’t set into the thinset properly, or the wrong profile was used. You’ll see a visible gap between the metal and the tile. Once water gets in that gap, the damage compounds fast.
- Grout cracking in a stair-step pattern. That pattern is a flex problem under the tile, which points to missing or failed Ditra. The uncoupling layer is what absorbs movement – without it, the movement goes straight into the grout.
- Musty smell in an ADU bathroom that won’t air out. Water is trapped behind the tile or under the floor. By the time you smell it, the Schluter layer has been compromised for a while, and you’re looking at tear-out to find the source.
See the difference
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After
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AfterReplacement Cost & What’s Included
If you’re repairing a failed Schluter component within an existing addition in Woodland Hills, here’s what to expect:
| Scope | Typical Price Range |
|---|---|
| Replace a failed shower edge profile (parts + labor) | $300 – $800 |
| Patch or replace a section of Kerdi membrane | $800 – $2,500 |
| Replace Ditra underlayment in a single room | $1,500 – $4,000 |
| Full Schluter-system bathroom rebuild inside an ADU | $9,000 – $28,000 |
| New home addition or ADU with Schluter waterproofing | $45,000 – $130,000 |
What drives the range: square footage, whether we’re replacing substrate or just the Schluter layer, and access. A second-story addition with no crawl space costs more than a ground-floor slab. Every quote we write is a single number – parts, labor, and cleanup – in writing before a tool leaves the truck. That’s the No-hassle upfront pricing commitment, and the invoice matches the quote. The 365-Day Done Right Promise covers the work for a full year, and if a repair fails within that window, the second visit is free.
DIY or Call Us?
You can safely check what failed: run your hand along the edge trim to feel for lift, tap the tiles to find hollow spots, and look for water stains on the ceiling below. That’ll tell you roughly what you’re dealing with, and it helps us give you a tighter quote over the phone. What you shouldn’t do is pull up tile or cut into the membrane to “see how bad it is.” Schluter systems are only waterproof if the whole envelope is intact. Cut a corner open and leave it exposed for a day or two, and you’ve turned a $600 edge-trim fix into a $3,000 membrane replacement.
Luca Romano learned the trade at Los Angeles Trade-Technical College, and he’s spent the better part of two decades fixing exactly these kinds of setbacks on job sites across the West Valley. The work tells you everything. We just make sure it tells the right story. If your Schluter addition or ADU is showing signs of failure, call (341) 217-2776 and we’ll walk you through what you’re looking at.
FAQs
Genuine Schluter membranes and profiles installed correctly should last 20 to 30 years. The Woodland Hills climate doesn’t shorten the lifespan on its own – what kills Schluter systems early is improper installation, wrong-profile use, or movement in the structure that was never designed for the addition’s weight.
No. Schluter’s waterproofing only works as a continuous envelope. Once water has gotten behind a seam or through a puncture, you can’t patch it from the front without removing tile to expose the membrane. Any contractor who tells you otherwise is guessing. Call (341) 217-2776 for a straight answer on your specific situation.
An edge-trim replacement is usually a half-day job. A Ditra replacement in a single room takes one to two days. A full Schluter-system bathroom rebuild inside an ADU runs one to two weeks depending on tile work and curing time. We’ll give you a written timeline with your quote under The Relay Visibility Guarantee.
We stock common Kerdi membrane, Kerdi-Band, Ditra, and the most-used edge profiles on our trucks so a routine repair doesn’t wait on a supply run. For less common profile finishes or specialty Schluter components, we source directly from our supplier network and it’s usually in hand within one to two days. Unlike countertop and cabinet work where we also handle KraftMaid, Cambria, and Silestone products, Schluter is a specialty waterproofing line we keep in stock because failed waterproofing gets worse every day you wait.
If you’re looking at water damage in your addition or your Schluter edge trim is lifting, call (341) 217-2776 for a free estimate. We’ll give you a written price before any work starts, and you’ll know exactly who’s coming to your door – background-checked, uniformed, and on time.
Written by Luca Romano, Owner, Sawyer Remodel Woodland Hills at Sawyer Remodel Woodland Hills, serving Woodland Hills and nearby areas.
