If a frame is crooked water can leak into the gaps between door and frame.
Patio door leaking at top.
Even brand new door bottoms won t create a secure seal if your door sill isn t properly adjusted.
If you cannot re create the leak problem inspect the interior of the door for stains or rust.
Test the door for the location of the leak.
I plan to seal.
Door bottoms are important but leaks can also be caused by the door sill.
Door bottoms seal between the panel and door sill so watch for signs when your door bottom needs replacing.
Damage to the door itself.
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.
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.
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.
The gutters are clear and the patio is level.
Water leaking through patio door.
Aim a garden water hose with a sprayer set on mist or low at the outside of the sliding door.
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.
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.