Most of the housing stock in this area went up between 1957 and 2007, with the median home dating to 1980, and across the 40 communities we cover, that 1980s-to-90s era of steel sectional doors is still the most common thing sitting in driveways. Steel from that period wasn't galvanized as heavily as what's used now, so once the paint seal breaks at a seam or a dent, rust gets a foothold fast. Birmingham's climate band is cold-moderate - not brutal, but enough freeze-thaw cycling through the winter months that moisture works its way into any crack in the panel coating and expands, widening the gap a little more each season. That's a slower failure than a sudden dent, but it's just as common a reason we get called out: a panel that looked fine in October is visibly bowed and rust-streaked by March. It's also why a repaint or touch-up on an older panel buys less time here than it would in a drier climate - the moisture finds the weak spot again.