The two failures we see most on these newer builds are a track bracket that's worked loose from the jamb over years of door cycles, and a roller that's worn enough to hop the rail under normal use rather than from an impact. Because Westminster's housing stock is younger than a lot of the surrounding service area, we see fewer completely rusted-out tracks and more wear-related roller failures - a difference that shows up in the fix, not just the paperwork. Left alone, a door running on a loose bracket eventually pulls the track section away from the wall entirely, which turns a bracket tightening into a full track replacement.