Water leaks through a sliding glass door most often because the weep holes are clogged (so the track can't drain), the weatherstripping or seals are worn, or the frame is misaligned or the sill seal has failed. Clearing the weep holes and replacing worn weatherstripping fixes many leaks; a misaligned or corroded frame needs professional repair. This matters a lot in Florida's heavy rains.
Common causes of a leaking sliding door
- Clogged weep holes — the track fills with water instead of draining outside
- Worn or missing weatherstripping and bulb seals
- A failed sill seal or caulk joint
- A misaligned or corroded frame that no longer seals
- Wind-driven rain overwhelming a door that isn't sealed well
Safe things you can check
- Find the weep holes (slots on the exterior side of the track) and clear them with a small tool
- Inspect the weatherstripping for gaps, flattening, or missing sections
- Look for cracked or missing caulk along the exterior frame
How the drainage is supposed to work
Sliding door tracks are designed to catch some water and drain it back outside through weep holes. When those holes clog with sand and debris — very common in Florida — the water has nowhere to go and comes inside. Keeping the track and weeps clear is the simplest leak prevention there is.
When to call a professional
If the frame is misaligned, corroded, or the sill seal has failed, a specialist re-squares and reseals the door and replaces weatherstripping. See our Florida care guide for storm-season prep.