The nineteen towns we drive to - Sunol, Camino Tassajara, Blackhawk, Mountain House, Norris Canyon, Byron, Diablo, Union City, Fairview, Castro Valley, Brentwood, Discovery Bay, Alamo, Cherryland, Milpitas, Newark, Ashland, Clayton, and Knightsen - sit on housing stock built mostly between 1961 and 2010, with the median build year landing around 1981. That's a wide enough spread that we see two different kinds of jobs on the same day.
On the older end of that range, closer to 1961-1980, we're pulling worn torsion springs that have simply outlived their cycle count, rollers that have gone from nylon smooth to cracked and loud, and openers original enough that parts for them aren't made anymore. On the newer end, developments built more toward the 1990s and 2000s tend to bring us garage doors with failing circuit boards, safety-sensor issues from settled slabs, and cables starting to fray on hardware that's had two decades of daily cycles.
Because the whole region sits in a mild climate band, we're not chasing the rust and ice-jammed track problems that colder regions deal with. Around here it's mechanical fatigue and age doing the damage, not weather.