Free written scope consultation - allowances, timeline, and change-order rules on paper before a single trade is scheduled
Schluter Home Additions & ADU: The Woodland Hills Owner’s Guide
Schluter home additions and ADU projects in Woodland Hills typically run $45,000 to $130,000 for a permitted addition, and $90,000 to $220,000 for a full detached ADU, depending on size, foundation work, and finish level. We stock Schluter’s complete KERDI waterproofing line, DITRA underlayment, and profile strips on our trucks, so a failed waterproofing detail or cracked transition doesn’t stall your project. Most Woodland Hills homeowners discover a Schluter part issue the same way: a tile crack at the shower curb, damp drywall below a window, or a LATICRETE-to-Schluter transition that wasn’t flashed correctly when the addition was built.
Key Takeaways
- Installed Schluter repair work (not full additions) usually lands between $800 and $6,500 in Woodland Hills, depending on whether you need a strip replacement or a shower rebuild.
- Full ADU construction with Schluter systems specified runs $90,000 to $220,000 from permits to punch list.
- We carry OEM Schluter profiles, KERDI membrane, and DITRA on the truck for same-visit replacement during active projects.
- Written price before any work starts on every Schluter repair or installation, no exceptions.
Which Schluter Models This Applies To
Schluter builds a modular system, not a single product, so compatibility is about matching the profile series to the tile thickness and the drainage system to the substrate. The big series names you’ll see stamped on aluminum edges: SCHIENE (square-edge trim for floors and walls), RONDEK (rounded edge), QUARTEC (wider, heavier-duty for thicker tile), and DILEX (expansion and movement joints, especially at room transitions in additions). The KERDI line (membrane and board) is the waterproofing standard for Woodland Hills ADUs because it handles the Valley’s dry-heat expansion cycles better than liquid-applied membranes, which can get brittle after a few 100-degree summers.
One compatibility gotcha we see constantly: DITRA-HEAT and DITRA cannot be swapped. If you have a heated floor, you need DITRA-HEAT, period. A contractor who “makes do” with regular DITRA under a heated cable system creates a floor the cable can’t sit in properly, and the tile cracks within two seasons. For aftermarket equivalents, we stock a few quality alternatives (such as matched aluminum stock for simple floor-to-carpet transitions), but for anything involving waterproofing or movement joints, we install Schluter OEM. The tolerance on KERDI-BOARD panels and matching washers is too tight for generic substitutions, and Woodland Hills building inspectors know the difference.
Styles & brands we work with
Signs Your Schluter Home Addition or ADU Is Failing
- Tile cracking along a linear line in the addition floor – This almost always traces back to a missing or undersized DILEX movement joint where new construction meets the original slab. Woodland Hills soil is heavy clay that shifts seasonally; without a proper movement profile, the tile takes the stress.
- Damp or discolored drywall at the shower floor outside the curb – Water is wicking past a torn or improperly lapped KERDI seam. Even a 2-millimeter gap in the KERDI-KERECK corner will leak slowly for months before you see it on the outside wall.
- Loose metal edge on a countertop or step – A SCHIENE or RONDEK profile that pops up means the anchoring leg wasn’t fully bedded in thinset, or someone used a knockoff with a thinner anchoring profile. The original Schluter profile anchors nearly twice as deep as most aftermarket copies.
- Grout cracking specifically along the outside perimeter of a tile floor – The floor wasn’t isolated from the walls. Perimeter movement joints should be continuous and filled with silicone or a Schluter DILEX profile, never grout.
- Visible white or chalky residue under a glass shower enclosure – Efflorescence means water is moving through the substrate and leaching minerals. Once you see it, the waterproofing layer has already failed, and the only real fix is a tear-out to the KERDI layer.
See the difference
Before
After
Before
After
Before
AfterReplacement Cost & What’s Included
Most Schluter part replacements in Woodland Hills fall well under the cost of a full addition, and that’s the honest starting point. Here’s what breakdown looks like in practice:
| Schluter Repair or Replacement Work | Typical Installed Range |
|---|---|
| Replace a cracked/loose SCHIENE or RONDEK profile (single run) | $800 – $2,500 |
| Add missing DILEX movement joint at a room transition | $1,200 – $3,500 |
| KERDI shower pan or corner seal repair (partial access) | $3,000 – $8,500 |
| Full KERDI shower rebuild including new pan, curb, and tile | $4,500 – $12,000 |
| Full ADU construction with Schluter systems specified | $90,000 – $220,000 |
| Full home addition with Schluter waterproofing and transitions | $45,000 – $130,000 |
The range swings on three things: whether we can access the failed area without removing finished tile, whether your substrate (backer board or mortar bed) is still sound, and what grade of Schluter profile the original install used. Every quote includes the exact Schluter part number, the labor to remove and reset tile, and a written price you approve before we open anything up. Our warranty on Schluter repair work runs 365 days from the completion date, in writing, with a free return visit if something fails.
DIY or Call Us?
Most Schluter profile replacements are not dangerous to attempt yourself, but they are unforgiving. If you replace a SCHIENE strip with an aftermarket piece that doesn’t match the original anchoring leg, the new strip will pop within a year, and the tile edge it was protecting will start chipping. For anything involving KERDI waterproofing or a shower pan, we recommend a trained professional. Water damage behind a failed KERDI seam in a Woodland Hills ADU can rot framing and grow mold before you see the first stain on the outside wall. That’s not a scare tactic; it’s the reality of southern California construction where stucco hides problems until they’re expensive.
What you can safely check yourself: look for cracked grout lines at floor-to-wall transitions, run a glass of water across the shower floor to see if it pools away from the drain, and inspect any metal edge for a raised anchoring leg. If any of those signal trouble, call us at (831) 290-6866. We’ll send a technician whose name and photo you’ll have before we arrive, and you’ll get a written price before any work starts.
FAQs
A properly installed Schluter profile or KERDI waterproofing system should last as long as the tile assembly itself, typically 20 to 30 years in Woodland Hills. The limiting factor in this climate is the dry-heat expansion stress on movement joints and the UV exposure on any exterior profile. Most failures we see are installation errors, not product wear.
In most cases, no. A KERDI shower pan is a continuous waterproof layer, and once water has breached it at one point, the water travels laterally under the tile. You can patch a small KERDI corner at the curb in about a day if the damage is isolated and caught early. Once the substrate behind it is saturated, the only reliable fix is a tear-out to the KERDI layer, which usually runs $4,500 to $12,000 depending on tile and size. Call (831) 290-6866 and we’ll tell you which situation you have before we touch a tool.
Most single-profile replacements or KERDI patch jobs run one day from start to finish. A full shower rebuild with new KERDI pan, curb, and tile typically takes three to five working days once we have materials on site. For full ADU or addition work involving Schluter systems, the timeline follows the overall project schedule, smart planning keeps the Schluter portion from adding extra days.
We stock Schluter SCHIENE, RONDEK, QUARTEC, and DILEX profiles, plus KERDI membrane, KERDI-BAND, inside and outside corners, and DITRA rolls on our trucks for most Woodland Hills service calls. If your job needs a special-order profile length or a niche we don’t carry, we’ll have it in hand within two to three business days and you’ll still get your written price before we open up any wall or floor.
Bottom line: Schluter parts fail when they’re installed wrong or when someone shortcuts the compatibility. We price the repair straight, stock what we install, and back every job in writing for 365 days. Call (831) 290-6866 for a free estimate on your Schluter home addition or ADU repair in Woodland Hills.
Written by Isaac Pruett, Owner, Mason Remodeling Co – Woodland Hills, CA at Mason Remodeling Co Woodland Hills, serving Woodland Hills and nearby areas.
