Durham's housing stock across the service area mostly dates from 1967 to 2006, with the heaviest concentration in the 1980s and 90s across the seven areas we work in most. That era of construction means a lot of original garage door hardware - steel track, nylon rollers, brackets lagged into framing that's now 30-plus years old - is still in service, just worn past where it tracks true anymore.
Add in Durham's cold-moderate climate band: freeze-thaw cycling through the winter months works at wood framing and track brackets a little at a time, loosening the lag bolts that hold the track plumb. A bracket that's a quarter inch off doesn't fail today - it fails the day someone's in a hurry and the door catches wrong on the way down.
We see this pattern whether a house sits closer to downtown Durham or out toward Hillsborough or Creedmoor - the age of the housing stock and the winter freeze-thaw don't stop at a town line, so the same failure shows up across the wider area, not just in one neighborhood. It's also why a quick DIY bracket tighten rarely holds for good: the wood around the lag bolt has usually already worked itself loose, and a bolt driven back into the same hole just works loose again.