A sliding glass door is no better than the frame into which it is placed.
Water leaking from top of sliding door frame.
How to stop water leaks under a door frame.
Moisture could be.
Some areas like your roof are obvious locations.
The exterior door in between the windows had water entering the wall and you can see stains around the door still.
However in some instances the top corner of the door is the true culprit.
Test the door for the location of the leak.
Spray the door and look for the leak location.
Have a reputable sliding door contractor remove the door if it has not been damaged build a new frame and reinstall the door.
If you cannot re create the leak problem inspect the interior of the door for stains or rust.
I plan to seal.
If a frame is crooked water can leak into the gaps between door and frame.
Common leak paths for doors.
Whether your door is sagging or bowed or just not making proper contact with the weatherstrip to seal out air and water the upper corners of your frame could be the problem.
It may seem obvious but a door left open or one that cannot be closed tightly because of wear and tear is a significant problem during a storm.
Damage to the door itself.
Causes of door leaks there are many potential pathways for water to leak in through a door but the biggest opening is of course the doorway itself.
There are many places where water can leak into your home.
I ve got a sliding patio door on the back of my home there s a moisture problem directly under the door in the basement.
When a door leaks the most common suspect is the bottom corner of the unit.
During irma my first floor s windows north facing about 8 on each side were leaking rainwater from the top of the window similar to the manner of leaking in the video by ada lam above.