Schluter Windows & Doors: The South Florida Owner’s Guide
We stock and install Schluter-compatible windows and doors across South Florida, with most replacement projects running $4,500-$15,000 for window replacement and $8,000-$25,000 for impact-rated installations depending on opening count and series. Same-day assessments are available throughout Broward and Miami-Dade counties. Most homeowners discover a Schluter window or door is failing when they notice sticking frames, visible daylight around seals, or condensation between glass lites after a storm season - signs that the thermal break or weatherstripping has degraded past the point of adjustment.
Which Schluter Models This Applies To
Schluter Systems is best known in South Florida for their waterproofing and membrane products, but their window and door integration components - particularly the Schluter-KERDI-BOARD window surrounds and Schluter-DITRA-HEAT door threshold systems - require exact matching when replacement becomes necessary. We see these most often in homes built between 2010 and 2019 in Coral Gables, Weston, and Aventura, where Schluter-specified assemblies were integrated with impact-rated PGT or CGI window frames.
To identify your exact part, check the interior frame edge for a stamped Schluter part number beginning with “KB” (KERDI-BOARD) or “DT” (DITRA series), typically located on a metal tag at the upper right corner of the rough opening. Measure the rough opening depth; Schluter KERDI-BOARD window surrounds come in 1/2-inch, 5/8-inch, and 3/4-inch thicknesses, and installing the wrong depth will compromise both the waterproofing warranty and the impact rating of the assembly. We carry OEM Schluter membrane and profile stock, though for threshold replacements we often source compatible extruded aluminum from Hialeah suppliers that meet the same 6063-T5 spec at lower lead times.
Signs Your Schluter Windows & Doors Is Failing
- Condensation between glass panes. This means the insulated glass unit (IGU) seal has failed, and the desiccant inside the spacer bar is saturated. In South Florida’s humidity, this accelerates frame corrosion and mold growth on adjacent KERDI-BOARD if not addressed within a few weeks.
- Visible gaps or compressed weatherstripping at the sill. The Schluter-DITRA threshold profile relies on a continuous compression seal; once the bulb gasket flattens or tears, wind-driven rain enters the subfloor cavity. We replace these with matching Schluter-RONDEC or compatible T-bulb profiles rated for 140 mph exposure.
- Frame operability gets stiff, then frees up, then jams again. This cycling pattern usually indicates the KERDI-BOARD surround has absorbed moisture and swollen, distorting the window’s square. The underlying cause is almost always a breach in the Schluter-KERDI membrane at the head flashing detail.
- Interior drywall staining below window corners. Water tracks at the lower corners point to failed end dams or missing back dams in the Schluter assembly, common in homes where the original installer skipped the corner sealant fillet that Schluter’s detail drawings specify.
- Increased road noise or temperature stratification near the opening. When the Schluter membrane-to-frame seal degrades, the acoustic and thermal performance of even a high-end impact window drops significantly. Homeowners in Palmetto Bay and Pinecrest notice this first during summer afternoons when the AC runs continuously.
Replacement Cost & What’s Included
For Schluter-integrated window and door replacement in South Florida, expect $4,500-$15,000 for standard window replacement and $8,000-$25,000 for full impact-rated installations, with the range driven by opening count, floor height (lift requirements above first story), and whether the Schluter membrane assembly needs partial or full rebuild. A single failing KERDI-BOARD window surround with membrane replacement typically runs $1,200-$2,800 including demolition, new board, Schluter-KERDI membrane, and reintegration with the existing window frame.
Our quotes itemize Schluter OEM materials, compatible extrusions when lead times demand it, and labor with permit handling. We warranty our installation workmanship and coordinate directly with your window manufacturer’s material warranty so there’s no gap in coverage. Every Schluter assembly we rebuild gets flood-tested with a hose spray per Miami-Dade’s protocol before we sign off.
DIY or Call Us?
Homeowners can safely inspect their Schluter assemblies for visible membrane tears, loose profile edges, or missing sealant - but the actual replacement crosses into professional territory fast. KERDI-BOARD surrounds are structural to the waterproofing envelope; a gap in membrane continuity voids the assembly’s hurricane rating and invites the subfloor rot we regularly find in Pembroke Pines and Davie homes where the DIY membrane lapping was reversed. The Schluter-KERDI membrane must overlap in shingle fashion, with specific minimum 2-inch overlaps at seams that are nearly impossible to achieve with the window in place.
We’re not affiliated with Schluter Systems, but we’ve rebuilt enough of their assemblies to know where the details hide. Call (844) 665-0162 for a free assessment - we’ll tell you if it’s a simple profile swap or a full surround rebuild before we touch anything.
FAQs
The KERDI-BOARD surround and membrane assembly typically lasts 15 to 20 years in South Florida’s climate, though salt-air exposure in coastal Hollywood or Key Biscayne can shorten membrane life to 10 to 12 years if the Schluter-RONDEC edge profile corrodes and breaches the seal. Call (844) 665-0162 and we’ll inspect the membrane condition - estimates are free.
Minor profile damage or isolated membrane tears can be patched with Schluter-KERDI-FIX and compatible membrane strips, but only if the substrate behind is dry and the original installation left adequate membrane tail for re-lapping. Once KERDI-BOARD swells or the IGU seal fails, replacement is the only durable fix. Call (844) 665-0162 for an honest assessment of whether patch or rebuild makes sense for your opening.
A single Schluter-integrated window replacement with full membrane rebuild takes one to two days; a standard door threshold with DITRA profile replacement takes four to six hours if the subfloor is sound. Multi-opening projects scale proportionally, and we coordinate material delivery to avoid downtime. Call (844) 665-0162 to schedule - we stock common Schluter profiles and can often start within a week.
We carry Schluter-KERDI membrane rolls, KERDI-BOARD in all three thicknesses, RONDEC and QUADEC edge profiles, and compatible T-bulb threshold gaskets on our South Florida trucks. Specialty colors or large-format board sometimes require a one-day pull from our Hialeah supplier. Call (844) 665-0162 with your part number and we’ll confirm same-day availability.
Groundwork Construction Co. of South Florida works with 50+ recognized industry brands across cabinetry, countertops, roofing, windows, doors, fencing, hardscaping, and ADU construction - including KraftMaid, Cambria, and Silestone - so when your project expands beyond the window opening, one contractor handles every phase. You choose the brand, we handle the build. From driveway to roofline, we build to spec, not to convenience.
Ready to fix that Schluter assembly before the next storm? Call (844) 665-0162 for a free estimate. Raymond Estevez and our team serve homeowners throughout South Florida, and we’ll give you a straight answer on whether it’s a two-hour profile swap or a full rebuild. Do it right the first time or you’ll do it twice - and the second time always costs more.
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.