Glenn Heights sits in a moderate-heat climate band, not the extreme end of Texas heat but enough that steel expands and contracts across a working day, every day, for twenty-plus years. That cycling loosens fasteners and works springs a little harder than a mild climate would. It's not dramatic - nobody's door snaps in July - but it's steady wear that adds up faster than a building owner tracking a maintenance log by memory would expect.
The other factor is simple building age. A door installed when the property was built around 2000 is now old enough that the original springs are past or near their rated cycle count on any bay with regular traffic. Businesses with median household income in the area around $79,739 tend to own rather than lease more often, which means the deferred maintenance decision sits with the owner, not a landlord who might catch it faster on a lease renewal walkthrough.
We don't have local incident data - no storm event or specific weather record for Glenn Heights - so we're not going to claim one. What we do have is the age of the stock and the climate band it sits in, and that combination is enough to explain why spring and roller calls from this area cluster the way they do."