Spray the door and look for the leak location.
Leaking under sliding glass door.
Damage to the door itself.
If you cannot re create the leak problem inspect the interior of the door for stains or rust.
Leaks are more common in frameless doors as compared to the framed ones.
Pfokus manufactures a high quality polycarbonate material.
You can do this by taking steps to make the bottom of the door frame waterproof before you install the door.
Have a reputable sliding door contractor remove the door if it has not been damaged build a new frame and reinstall the door.
Check to see which door moves and which one is the stationary.
Aim a garden water hose with a sprayer set on mist or low at the outside of the sliding door.
Solutions for fixing the leaks under the frameless shower door.
If you find water leaking through the gap under the door then you can install a shower door sweep.
These have a strong.
Test the door for the location of the leak.
The framed ones have a problem of corrosion because of more metal.
If a frame is crooked water can leak into the gaps between door and frame.
The best way to stop the leaks is to prevent them from occurring in the first place.
Note that if the sliding glass door leak you described has already worked its way under any adjacent exterior siding you ll likely have to remove and reapply that siding as well in order to install the new material and repair the leaking sliding glass door but the extra effort will be well worth it the next time coastal winds blow rain your way.
Since sliding glass doors and sliding impact windows are heavy they move along metal tracks fitted to the bottom and top of their frame.
To slide the heavy doors along the metal frames the doors use metal or plastic rollers.
There are preformed plastic flashing pans that you can use under the door or you can create one with thin sheets of lead or modern rubberized asphalt based flashing tape.