It can be done with the door in place.
How to replace broken glass in sliding patio doors.
The first thing you need to do is remove the trim around the glass which is known as the mull.
Commercial sliding doors typically are glazed in this manner.
These removable stops can be popped off allowing for an accurate measurement of the glass unit in the door.
Take the broken glass out from the opening and use the putty knife to scrape off any glass fragments that may be stuck to the original caulk.
Remove any nails that remain in the trim.
Replacing the glass on sliding patio doors doesn t mean removing the entire door.