In article , willshak wrote:

Another thing I forgot. When the slider is on the inside, you can stick
a piece of broom handle or a piece of wood as a wedge in the track and
the door can not be pried open. Having the slider on the outside would
not allow that.

Good point. And every sliding door in every house I've owned
has presented me with the option of using the broom handle
as an added security measure. FWIW, using standard PVC water
pipe works great and is a lot cheaper.

Therefore, I would guess the slider on the inside is the
standard convention.

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