Housing in the Hoffman Estates service area was built mostly between 1955 and 2009, with the median landing around 1981, and the bulk of it - across 81 named areas - went up in that 1980s-to-90s stretch. That means a lot of original torsion hardware is still doing the job it was installed to do decades ago, and lift cables don't last as long as the doors they lift. Add in a cold-winter climate band on the severe end, and steel cable strand goes through real freeze-thaw fatigue every season - it flexes thousands of times a winter at temperatures the metal wasn't rated to flex at comfortably. Across 431,668 households in the service area, with 215,904 of those owner-occupied houses, that's a large base of aging torsion systems built in roughly the same decade, which is exactly why this failure clusters the way it does rather than showing up at random.