We ve tried everything much like eric above including getting the balcony refelted and new patio tiles put on we ve also put a lip around the balcony.
Patio door leaking at top.
Even brand new door bottoms won t create a secure seal if your door sill isn t properly adjusted.
Water leaking through patio door.
Test the door for the location of the leak.
There are patio doors to the balcony and the leak comes in under the wooden frame of the patio doors the doors are plastic and soaks the carpet and woodwork.
If a frame is crooked water can leak into the gaps between door and frame.
If you cannot re create the leak problem inspect the interior of the door for stains or rust.
A sliding glass door is no better than the frame into which it is placed.
I plan to seal.
It just comes in in one corner.
The gutters are clear and the patio is level.
Have a reputable sliding door contractor remove the door if it has not been damaged build a new frame and reinstall the door.
Spray the door and look for the leak location.
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.
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.
Aim a garden water hose with a sprayer set on mist or low at the outside of the sliding door.
Door bottoms seal between the panel and door sill so watch for signs when your door bottom needs replacing.