The service area runs about 42,230 households, with 22,358 of those owner-occupied houses, spread across roughly 20 named communities radiating out from Johnson City. Housing dates mostly from 1958 to 2001, with the heaviest concentration in 1960s and 70s construction - that's the era that set the garage door standards most of these houses are still running on: single-car openings with light-duty torsion springs, steel track hung on hardware that was never meant for a 30-year service life. Towns like Gray, Jonesborough, and Elizabethton at six to eight miles sit right in that same build window, so the failure patterns repeat: frayed cables, worn rollers, openers from the 90s still limping along. This whole region sits in a cold, moderate climate band, which means winter cold snaps are routine enough that door seals and spring tension both take the seasonal hit - a spring that's borderline in October often finally lets go in a January cold stretch. We don't have numbers on the newest construction in the outer towns like Unicoi or Walnut Hill, so if your house is a recent build, the general pattern above may not apply to your door the same way it does to the older majority.