Broward County Certificate of Competency 20-WD-21968-X
Why does my sliding glass door leak water onto the floor during heavy rain?
A straight answer for Broward County homeowners, then what you can check yourself and when to call. Free estimate: (954) 906-1715.
In most cases water is getting into the door's bottom track faster than the track can drain, and it spills over the inside edge onto your floor. The usual culprits are blocked weep holes, worn or flattened weatherstripping, worn rollers that let the panel sit crooked, or a sill pan and perimeter seal that have failed behind the frame.
The nuance: a sliding door is not meant to be watertight. It is designed to let some water into the track and then drain it back outside through weep slots. So the question is rarely "why is water in the track" — it is "why isn't the track draining," or "why is water arriving behind the frame instead of in front of it."
Why it happens
Broward's rainy season brings near-daily afternoon storms and wind-driven rain that hits a large glass opening sideways, not straight down. Wind pressure pushes water up and under the interlock and over the track lip, and if the weeps are plugged with sand, mulch fines or old caulk, the track fills like a bathtub and overflows inward.
Salt air and humidity do the rest. Rollers and track hardware corrode, so the panel drops and no longer seals against the jamb; vinyl weatherstripping and bulb seals go hard, shrink and stop making contact; sealant at the frame perimeter dries out under UV and opens hairline paths into the wall.
The more serious version is a failed sill pan or flashing. If the original installation lacked a proper pan under the sill, or the pan's end dams and back leg were never sealed, water that gets past the frame runs into the floor structure instead of back outside. That shows up as staining along the baseboard, swollen flooring, or a wet patch that appears a few feet from the door — and it is not fixed by caulk.
What you can check yourself
Find and clear the weep holes
Look along the outside face of the bottom track for small slots or covered flaps. Clear debris with a soft brush or a gentle flush of water and watch whether it drains back outside.
Pour a cup of water in the track
With the door closed, pour water into the track and watch where it goes. If it sits still or runs inward, drainage is the problem, not the glass.
Press on the weatherstripping
Run a finger along the bulb seals and the interlock where the panels meet. Hard, cracked, compressed or missing sections let wind-driven rain straight through.
Watch the panel as it slides
Grinding, dragging or a panel that sits lower at one end usually means worn rollers, which breaks the seal at the sill and jamb.
Look outside and above
Check for a gap at the stucco-to-frame joint, open caulk at the head, or a soffit or gutter dumping water on the door. Water can enter well above the sill and appear at the floor.
When to call a pro
Call when the weeps are clear and it still leaks, when the floor, baseboard or drywall is staining or swelling, when the panel is dropping or hard to lock, or when the leak only happens in wind-driven rain. Those point to interlock, sill pan or flashing problems inside the opening, which can only be judged with the panel and trim removed.
If the fix turns into a door replacement, it is permitted work. A permit from your city's building department (or Broward County Building Code Services in unincorporated areas) is required, the product approval and attachment details go in with the permit, and a final inspection closes it out; HOA or condo approval is commonly required too, so verify both with your city's building department and your association. Because all of Broward is in the High-Velocity Hurricane Zone, a replacement slider needs an approval accepted for the HVHZ — usually a Miami-Dade NOA — rated for that opening's design pressure. We hold Broward County Certificate of Competency 20-WD-21968-X for windows, doors, shutters and garage doors, and we serve Broward County only.
Impact Entry & Sliding Doors work is done under Broward County Certificate of Competency 20-WD-21968-X (windows, doors, shutters & garage doors).
What a pro will do
- Trace the actual water pathWe water-test the opening in sections to separate track overflow, interlock leakage and wall leakage above the head.
- Service drainage and sealsClear and reopen weeps, replace hardened weatherstripping and interlock seals, and replace corroded rollers so the panel seats properly.
- Rebuild the sill and flashingWhere the pan has failed, the fix means pulling the frame and installing a proper sill pan with end dams and correct flashing laps back to the outside.
- Replace to the approval when neededIf the door is beyond repair, we install an impact-rated slider with HVHZ product approval, anchored exactly as the approval specifies.
- Handle permits and inspectionsWe pull the permit when the work needs one, schedule inspections and see the permit closed out.
Related questions
- Will caulking around the frame stop the leak?
- Sometimes, if the only path is an open joint at the head or jambs. But never caulk the weep holes or the bottom track — sealing the drainage path traps water inside the frame and usually makes an interior leak worse.
- Does an impact-rated slider leak less?
- Impact doors are tested for both impact and water infiltration at design pressure, so a correctly installed unit handles wind-driven rain better than a worn 1970s slider. The install still matters more than the label: without a sill pan and proper flashing, any door can leak.
- Does replacing my sliding door help with insurance?
- Approved opening protection is one of the categories on Florida's wind-mitigation form OIR-B1-1802, and Florida law requires insurers to offer discounts for wind-loss-mitigation features (s. 627.0629, Florida Statutes). Protection is evaluated across all openings, and a licensed inspector completes the form — we don't do those inspections. You can try the free Wind Mitigation Credit Checker on this site.
- What does the repair or replacement cost?
- It depends on the door size and number of panels, whether it is a repair or a full replacement, access and finish work, the product approval and design pressure required for the opening, permit requirements, and what is found once the frame is opened up. We give a free estimate — call (954) 906-1715.
- When is the best time to schedule this work?
- The November-April dry season generally offers easier scheduling and better installation conditions. Demand rises in spring and right before the June 1 start of hurricane season.
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