A garage built in 1964 was almost never built with insulation in mind, and a lot of those openings are still running steel doors with no thermal break, or old wood doors that have swelled and shrunk through sixty winters. This service area sits in a cold climate band with genuinely severe winter conditions, and that combination - older, uninsulated door plus hard cold - is what actually breaks hardware. Metal contracts, grease stiffens, and a spring that was fine in September locks up or snaps in January. We see more torsion spring failures and more opener strain in houses from this era specifically because the door is heavier to lift once the weatherstrip stiffens and the track has decades of minor misalignment in it. We don't push insulation on every job - if your door is sound and sealing fine, replacing it for efficiency alone usually isn't worth the cost. But if you're already replacing a cracked panel on a house this old, it's worth asking what you're replacing it with.