There is lock available that installs to the top of the sliding door. It prevents the movable door from being moved sideways or raised up and out of the bottom track.
You need to drill a hole in the top frame of the track where the lock when activated inserts a rod up into and through the top frame.
Its is activated with a key for security.
Try a locksmith locally as I did on moving into our condo.
And yes they also change all the locks on all your exterior doors. I had this done where I only need one key now for all of my entry doors and garage doors.Worth the $200.00 or so expense.
There are also locks that can be installed on windows that prevent them from being raised more than 10 to 12 inches or so. This way on a coole evening you can leave a window open.
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