Most of the homes we go into for a new door installation in Minnetonka were built between 1957 and 2005, with the median landing around 1977. That puts a big share of the housing stock squarely in the 1960s-70s construction wave that covers the 52 named areas across this service region. Doors from that era were steel, single-layer, and hung on hardware that was never built with today's cold-weather standards in mind.
The climate is the other half of it. This area sits in a severe cold band, and that matters more than people think. A steel panel that flexes every winter as the slab underneath heaves eventually bows at the seams. Original rollers, lubricated decades ago, stiffen and bind when the grease inside them thickens in deep cold. None of that is a defect - it's just what 50-year-old steel and nylon do when the ground under the slab freezes and thaws every year. By the time a homeowner calls us about a door that won't seal at the bottom or won't open past a few inches, the hardware underneath has usually been quietly failing for a couple of winters already.