In the picture you show you could place one piece vertically on the wall side of the door on the end the picture was taken.
How to fix a gap in a sliding glass door.
Buy new foam filled vinyl tube weatherstripping the press it.
Push in the weatherstripping until secure.
You may be able to square just the.
Pry out the old weatherstripping from inside the door frame using a flat head screwdriver.
For the best seal my recommendation would be some pieces of weatherstripping or gasket.
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It looks like the gap is caused by the hardware for this barn style door which is a common scenario.
This video shows you how to take apart sliding glass doors.
The door opening in the framing is not square.
The proper way to fix it would be to remove the door and door frame and square up the opening in the house framing.
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How to fix the gap on your patio door duration.
Simonton windows doors 102 622 views.
Remove the door from the track.
Gap between sliding doors doors cannot close properly.
First locate the roller adjustment screws and use a screwdriver to turn the screws counterclockwise.