South Hill sits in a moderate-cold climate band, and that shows up in track problems more than most homeowners expect. Temperature swings through the winter make steel track expand and contract slightly at the mounting points, and over 25-plus years that can loosen the lag screws holding track to the jamb - a loose rail is a door waiting to jump. Combine that with the roller hardware typical of houses built around the neighborhood's 1997 median, and you get a setup where the rollers were fine for a decade or two but are now worn enough that a hard stop or a slightly bent rail is enough to pop them loose.
Across the broader area this shop covers, median household income runs around $115,750 with roughly 228,944 households, but South Hill's own numbers run a bit different - about 22,789 households and a median income near $109,235. That's not why doors go off track, but it does shape which fix homeowners tend to choose: track repair and roller replacement over a full door swap, when the door itself still has years left in it. We make that trip in from Kent, about 19 miles out, so it's worth batching a quick door tune-up into the same call if you've noticed the rollers getting loud.