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How to fix a gap in a sliding glass door.
Gap between sliding doors doors cannot close properly.
Then remove the door stop at the top of the frame which should be as simple as unscrewing it.
Remove the door from the track.
For the best seal my recommendation would be some pieces of weatherstripping or gasket.
First locate the roller adjustment screws and use a screwdriver to turn the screws counterclockwise.
Sliding glass door adjustments.
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Simonton windows doors 102 622 views.
Push in the weatherstripping until secure.
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.
Buy new foam filled vinyl tube weatherstripping the press it.
How to fix the gap on your patio door duration.
The door opening in the framing is not square.
It looks like the gap is caused by the hardware for this barn style door which is a common scenario.
This will retract the rollers and make the door flush with the track.
This video shows you how to take apart sliding glass doors.