Minnesota's winters sit in a severe cold climate band, and a steel door from the early 1970s wasn't built with today's insulation standards. On an older uninsulated door, cold steel contracts, the panel seams gap, and the weatherstripping at the bottom goes stiff and cracks by February. None of that is a flaw unique to Anoka - it's what happens to any door from that era in this climate. What is specific to Anoka is how many houses are affected: across roughly 7,422 households here, a meaningful share are still running original or early-replacement doors from a build era 20 years older than the area median.
When we do recommend full replacement in Anoka, it's usually because the track has been reset so many times from an undersized spring that the frame itself has shifted, or the panel gauge is thin enough that a new opener will outlive the door by years. Those are structural calls, not sales ones, and we'll walk the door with you before making one.