On the Key, the most common off-track calls we see trace back to the age of the hardware rather than any one dramatic event. With the median home here going up around 1979, most tracks and brackets are original - steel that's been through decades of coastal humidity and daily use, with lag screws worked slowly loose in jamb wood that's shrunk and settled since it was framed.
The mild, temperate band that covers this stretch of coast means we're not chasing freeze-thaw warps in the track the way colder regions do; what we see instead is slow bracket fatigue and worn rollers that finally let a door walk sideways off the rail under normal use. On a smaller, tighter market like this one - 4,172 households on the Key - we also see more owners moving straight to full hardware replacement rather than patch repairs, since a median income of $143,365 here tends to favor fixing it right once rather than re-visiting the same bracket in two years.