Most of the garage doors we service here went in when the house did, somewhere between 1967 and 2006, with the bulk of that stock dating to the 1980s and 90s. A torsion spring installed in a Croasdaile Farm or Hope Valley build during that window is now pushing 30-plus years of cold-weather cycling, and steel fatigues whether or not anyone's touched it.
Durham sits in a cold-moderate climate band, so steel springs here see enough winter contraction to shorten their cycle life compared to warmer regions. Cold metal is less forgiving under tension, and a spring that's already near the end of its rated cycles is more likely to let go on a January morning than a July afternoon.
Across the roughly 9,094 owner-occupied houses in our service area, most share that same era of original hardware, which means a lot of this service area's springs, cables, and rollers are all aging out around the same time. We see this most in neighborhoods like Old West Durham and Watts Hospital-Hillandale, where the original builder-grade doors are still hanging, and less in newer construction nearer Research Triangle Park where hardware tends to be younger.