The complication on Oakley's housing stock isn't age so much as consistency - a lot of these doors were installed in the same few years during the area's main building run, which means when one roller fails on a house built in '95, the other nine on that door are statistically close behind. We also see track wear that mimics a roller problem: a track knocked slightly out of plumb from a car bumper or a settling slab will make the same grinding noise a bad roller does, and swapping rollers into a bent track just buys you a few weeks before it's back. We check the track alignment before we call it a roller job, not after. Heat is a smaller factor here than in hotter climate zones, but Oakley still sits in a moderate-heat band, and nylon rollers do stiffen slightly on the hottest days, which can make an already-worn roller announce itself louder in summer than winter.