Most of the housing across this service area went up between 1955 and 2005, with a lot of it clustering around the mid-1960s - Fremont's own growth spurt, plus the older pockets in places like Niles and Mission San Jose. That means a huge share of doors in town are still running on original or first-replacement torsion hardware sized for lighter, older door panels. When a homeowner swaps in a heavier insulated door decades later without upsizing the spring, the spring works harder than it was built for and fails sooner. The mild temperate climate here doesn't add the freeze-thaw stress that cracks springs and seals elsewhere, so when we do find early failure, it's almost always mechanical fatigue or the wrong-weight spring - not weather damage. That's actually good news: it means most Fremont failures are predictable wear, not storm damage, and predictable wear is fixable on a schedule instead of an emergency.