Tualatin sits in a cold-moderate climate band, which means the garage door isn't just a moving part - it's part of the building envelope for months at a time. A door built in 1980 or 1985 to the standards of that era wasn't spec'd for the insulation expectations homeowners want today, and after three or four decades of damp winters, steel skins that weren't galvanized to current standards start to rust from the inside out at the bottom panel, where water sits. We see this most in the stretch of homes built across the 1964-2006 window, with the heaviest concentration from the 1980s and 90s - that's a door old enough to have outlived its hardware twice over but still structurally the original unit. On top of age, a lot of these garages were never built with the door size the house would eventually need: a single-car opening retrofitted for a second vehicle, or a shop addition that left the original door too narrow. Neither of those is a repair problem. They're an installation problem, and they're specific to how this town's housing stock aged and got modified, not something a universal fix addresses.