Erwin's median household income runs $45,422 (F7's area-wide figure is $54,953, noticeably higher), and that gap shows up in how long people here keep an original door running before replacing it. Across the wider service area roughly 22,358 of 42,230 households own their house outright, and in a town built mostly in the 1958-2001 window with a local median near 1965, a lot of those original doors are well past the point where a spring replacement buys much more time. The hardware installed when these houses went up - single-layer steel, lighter-gauge tracks, older torsion setups - wasn't built for forty-plus years of daily cycling. Add a moderate but real cold season that stresses seals and lubricant twice a year, and you get doors that still open but no longer insulate, seal, or balance the way they did. None of that is unique to any one house in Erwin - it's the math of an older housing stock meeting an income level where replacement gets put off until the door actually fails rather than scheduled ahead of it.