Time on the Job
A straight roller swap on a double door - all rollers, no track realignment needed - is a short job once the truck is on site, because the work is mechanical and repetitive: release tension, slide the old roller stems out of the hinges, seat the new ones, rehang. Where it runs long in Chester specifically is when the rollers have been bad for a while and the track has worn a groove or bent from the door riding crooked, which is common on doors from the early-1990s building wave once the original rollers finally give out after thirty-plus years of use. If a roller has seized and been dragging rather than rolling, we're often also looking at a scored or dented track section, and that adds time because it's a second part, not a second trip. We'd rather diagnose that on arrival and quote it honestly than promise a fifteen-minute fix and hand you a bigger bill. The upside of a door this age is that the opener and springs are usually a separate system from the rollers, so a roller job doesn't automatically turn into a full teardown.
The Symptom
The giveaway in Chester is a grinding or popping sound right as the door passes the bend from vertical track into horizontal, worse on a cold morning than at noon. That's the nylon roller tires: they shrink and stiffen in the cold, and Chester sits in the region's severe-cold climate band, so winter is where a roller that's merely worn turns into a roller that's actually cracked. Steel rollers with sealed bearings behave differently - they don't crack, but their bearings seize, and a seized steel roller will groan and drag rather than pop. Either way, the rollers are usually not acting alone. On a door built around the early 1990s, like the typical Chester garage, the original hardware has had three decades of New Hampshire winters to work on it, and rollers are usually the first part to fail because they're the part that moves every single cycle. If you're hearing the noise on both sides of the door evenly, it's probably just wear. If it's one side only, suspect a bent track section riding on top of the bad roller.
