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Schluter Home Additions & ADU: The Sacramento Owner’s Guide
Home additions and ADUs built with Schluter waterproofing and uncoupling systems in Sacramento typically run $45,000 to $130,000 installed, depending on square footage, foundation work, and whether you’re adding a single room or a full detached unit. If you’re reading this because an existing addition is showing signs of water intrusion, cracked tile, or failed substrate, the most common culprit is improper membrane installation at a transition point, not the Schluter product itself. We stock Schluter-compatible materials on the truck and can usually diagnose the failure point in a single visit.
Which Schluter Models This Applies To
Schluter makes a broad line of building systems, but for home additions and ADUs in Sacramento, the relevant products are the KERDI waterproofing membrane, KERDI-BOARD substrate panels, DITRA and DITRA-HEAT uncoupling membranes, and the associated profiles and transition strips. Each has specific thicknesses and application ratings. KERDI-BOARD comes in panels from 5mm to 50mm, and using the wrong thickness against a concrete slab or over a plywood subfloor is exactly the kind of mistake that shows up two years later as tile movement or moisture wicking up a wall.
When matching parts, the label matters. Schluter products carry a name and a thickness code printed along the edge or on the packaging. Before you buy a replacement piece, check the original spec sheet, not just the product name. A KERDI-BAND meant for 10mm board won’t perform the same over 20mm transitions. For most Sacramento additions, we recommend OEM Schluter membrane and profiles rather than aftermarket equivalents. The price difference on a single roll is modest, and the warranty chain stays intact when the full system uses matched components. Bradford Remodeling Co Sacramento installs Schluter products as an independent contractor, not as a factory-authorized dealer. We specify the system, buy it through documented supply lines, and stand behind the labor with our own written guarantee.
Styles & brands we work with
Signs Your Schluter Home Addition & ADU Is Failing
- Grout lines cracking in a straight pattern across the floor. This usually means the substrate below moved and the uncoupling layer wasn’t installed with full coverage. The tile is bonded fine; the layer beneath it failed.
- Water staining on the ceiling below a second-story bathroom addition. The most common source is an unsealed KERDI seam at a pipe penetration. Schluter’s system works, but every seam has to be overlapped by a minimum of 2 inches and embedded in thin-set without gaps.
- Musty odor in an ADU that won’t clear with ventilation. Moisture is sitting somewhere it shouldn’t be, often behind a wall where KERDI-BOARD joints were taped with mesh instead of the required KERDI-BAND.
- Tile lippage or movement near a door threshold in a Sacramento addition. Clay soil here expands and contracts with wet winters and dry summers. A floor that wasn’t isolated from foundation movement will telegraph that shift straight to the surface.
- Visible mold or efflorescence at the base of an exterior wall. That’s water wicking up from grade. If the membrane wasn’t run high enough behind the stucco or siding, the wall is pulling moisture from the soil on every rain cycle.
See the difference
Before
After
Before
After
Before
AfterReplacement Cost & What’s Included
A Schluter system repair inside an existing Sacramento addition usually runs from $2,000 to $8,000 for a targeted fix, like re-taping a seam, replacing a section of KERDI-BOARD, or re-sealing a shower bench. If the failure extends across a full floor or the waterproofing needs to be redone before new tile goes in, that work lands inside a broader remodel, and the numbers scale accordingly.
What drives the range is access. A shower wall tear-out costs less than pulling a toilet and vanity to reach a failed membrane across a bathroom floor. It’s also about what’s underneath. Sacramento homes on post-tension slabs behave differently than raised foundations, and that affects how the repair layer gets installed. Every estimate includes a written price before work starts, a parts breakdown with Schluter product names and quantities, and the 365-Day Done Right Promise in writing: if the repair fails within the full year, we come back and correct it at no charge.
DIY or Call Us?
You can check the visible signs yourself: look for cracked grout lines, caulk separation at transitions, or any softness underfoot near a drain. What you shouldn’t do is open a wall to chase a moisture line. Water travels, and the failure point is often six feet from where the stain shows. Cutting into KERDI-BOARD without knowing the stud layout and electrical runs turns a $3,000 repair into a $12,000 rebuild fast.
Schluter products are forgiving when installed correctly and unforgiving when the overlap is short or the thin-set is mixed wrong. If the floor is moving or water is showing up where it shouldn’t, call us at (279) 226-1509. We’ll diagnose the failure, put the fix in writing, and tell you what it costs before any wall comes down.
FAQs
A properly installed Schluter KERDI or DITRA system should outlast the tile on top of it, typically 30 years or more. The weak points are seams and transitions, which is why installation matters more than the membrane’s age.
Targeted repairs are possible in most cases. We can cut back to solid substrate, patch in new KERDI-BAND at the failed seam, and re-tile the affected section. Full replacement is only needed when the substrate itself has degraded from prolonged moisture exposure. Call (279) 226-1509 for a diagnosis and a written repair quote.
Most targeted repairs run two to three days from demo to new tile, plus thin-set cure time before the area handles water. Larger failures that involve a full shower rebuild can take a week. We’ll put the timeline in writing with the price.
We keep KERDI membrane, KERDI-BAND, DITRA mat, and common profile sizes on the truck for most service calls. Special-order profiles or non-standard board thicknesses typically arrive within a week through our Sacramento suppliers. We also specify KraftMaid, Cambria, and Silestone products for finish surfaces where those brands fit the scope.
Written by Curtis Lane, Owner, Bradford Remodeling Co Sacramento at Bradford Remodeling Co Sacramento, serving Sacramento and nearby areas.
