Boone sits in a cold-severe climate band, and repeated freeze-thaw cycles on aging torsion springs are the single biggest reason for snapped springs here. Steel contracts in the cold, and a spring that's already fatigued from two or three decades of daily cycling loses whatever margin it had left right when the temperature drops hardest. Across the ten communities we work near - Blowing Rock, Seven Devils, Banner Elk, Beech Mountain, Sugar Mountain, West Jefferson, Linville, Newland, Jefferson, and Crossnore - the housing stock skews to the same 1960s-70s builds, so this isn't a Boone quirk, it's a whole mountain's worth of doors aging on the same schedule. The failure mode is consistent: original spring, original drum, decades of expansion and contraction, then a cold morning. Newer doors in newer subdivisions don't see this nearly as often because the hardware hasn't had time to fatigue yet. Here, it has. That's the honest answer to why the same repair call comes in over and over on the same kind of door - it isn't bad luck, it's a housing stock and a climate that were never going to be gentle on steel torsion springs for this long.