Most of the doors we replace in Columbia aren't failing from one bad event - they're aging out. Housing across this area runs from 1948 up through 2014, but the median build year sits around 1976, and the bulk of it is 1960s and 70s stock built out village by village: Wilde Lake, Harper's Choice, Long Reach, Oakland Mills, Owen Brown, Hickory Ridge, Kings Contrivance. Doors from that era were sized to openings and track systems that don't match what's sold today, so when a panel finally cracks or a spring gives out for the third time, replacement usually makes more sense than another patch repair. On top of the age issue, this area sits in a cold, severe climate band. Steel doors from the 70s often ran with little or no insulation, and after five decades of freeze-thaw cycles the seals, tracks, and hardware have usually loosened well past what a tune-up fixes. That combination - original-era hardware plus decades of cold-weather stress - is why installation calls cluster in the older villages rather than the newer construction toward West Elkridge or River Hill.