This video shows you how to take apart sliding glass doors.
How to fix a gap in a sliding glass door.
Then remove the door stop at the top of the frame which should be as simple as unscrewing it.
You may like my other videos.
Pry out the old weatherstripping from inside the door frame using a flat head screwdriver.
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.
Push in the weatherstripping until secure.
First locate the roller adjustment screws and use a screwdriver to turn the screws counterclockwise.
This will retract the rollers and make the door flush with the track.
Gap between sliding doors doors cannot close properly.
Remove the door from the track.
Simonton windows doors 102 622 views.
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.
It looks like the gap is caused by the hardware for this barn style door which is a common scenario.
How to fix the gap on your patio door duration.
Just type lsailor1 in the youtube search bar.
For the best seal my recommendation would be some pieces of weatherstripping or gasket.