New Haven sits in a cold, severe climate band, and that's the single biggest reason doors here fail differently than doors in a milder region. Steel panels contract and expand enough each winter to crack cheap weatherseals and pull tracks out of plumb, which is a slow process you don't notice until the door starts binding on one side. Add to that a housing stock where most homes were built between 1954 and 1986, median year 1972, across the 41 named areas we work in - meaning a huge share of the original garage openings and hardware are still the originals, or a first replacement from decades back. With 170,293 owner-occupied houses across this service area built mostly in that 1960s-70s run, a lot of torsion springs and rollers out there have already outlived their rated cycle count, and the cold makes the metal fatigue show up sooner, not later, than it would in a warmer climate.