Cupertino, Sunnyvale
Cupertino homes mostly went up in the early-to-mid 1970s, which means torsion springs are standard but original hardware is 50 years old. We drive the 5 miles from Sunnyvale to fix it.
The repair
Cupertino's housing stock centers on 1973, which puts most garages a full decade past the extension-spring era that's still common in the oldest parts of this service area.
By the early 1970s, torsion spring setups on a horizontal shaft above the door were standard in new construction here, so the repair we're usually doing in Cupertino is a torsion spring swap, not a conversion job.
We measure the wire size, the wind direction, and the shaft diameter off the old spring or the door's weight and drum setup, then install a matched pair - torsion springs work in sets, and replacing only the broken one throws off the balance on the other side within months.
We also check the center bearing and the end bearing plates, since those wear out around the same age as the springs do. If the cable drums or the shaft itself show pitting or play, we flag that before we close out the job, because a bad bearing will take out a new spring early.
Local causes
A torsion spring is rated for a number of open-close cycles, generally somewhere around 10,000, and a door built in 1973 has had half a century to burn through that. Cupertino sits in the same mild temperate band as the rest of this service area, so you're not dealing with the freeze-thaw cycling that snaps springs early in colder climates - the failure here is almost always age and cycle count, not weather. Houses in this part of the service area tend to run a bit newer than the 1964 median you'll find closer to Sunnyvale, but 1973 construction still means original torsion hardware on plenty of doors that have never been touched. Household incomes in this pocket run noticeably above the $207,750 median for the broader service area, and we see that show up in one pattern: owners replacing both springs and the bearings at once rather than patching just the broken side.
DIY or pro
A torsion spring is wound under enough tension to break a bone or worse if the winding bars slip, and that risk doesn't change because the house is newer or the neighborhood is nicer.
We won't talk anyone through doing this one themselves - it's not a judgment on your handiness, it's that the failure mode is violent and the tools (proper winding bars, a ladder rated for the reach, clamps to pin the door) aren't things most garages have on hand.
What you can safely check yourself: whether the door is a single torsion spring or two, whether there's visible rust or a gap in the coil, and whether the opener strains or the door drops unevenly when you pull the emergency release. That tells us what we're walking into before we even get there.
Timing
Most torsion spring jobs on a standard single or double door run under two hours once we're on site, torsion hardware being more straightforward to service than the older extension-spring systems with their separate pulley and cable runs. We're coming from Sunnyvale, about 5 miles out, so plan around drive time on top of the repair itself rather than treating this as a same-hour walk-in. Bearing replacement or drum work adds time if the shaft shows wear, and we'll tell you that up front rather than discover it mid-job and stretch the appointment without warning you first.
Pricing
We don't publish a flat number here because spring size, wind count, and whether bearings or drums need replacing alongside the springs all move the cost, and quoting a price without seeing the door is a guess dressed up as a fact.
Questions
Torsion spring hardware had become standard in new residential construction by the early 1970s, and most Cupertino homes were built around 1973. Extension springs - the kind that stretch along the horizontal tracks - show up more in older stock closer to Sunnyvale's 1964 median build year. Either system fails the same way eventually: metal fatigue after tens of thousands of open-close cycles.
Usually not for long. Torsion springs work as a matched pair carrying the door's weight together. When one breaks, the other has been carrying extra load and cycling under the same age and wear, so it's close behind. We replace both at once rather than leave a mismatched pair that will throw the door off balance within weeks or months.
No. We run out of Sunnyvale and drive the roughly 5 miles into Cupertino for jobs here. We're upfront about that rather than implying a local branch that doesn't exist - factor drive time into when you expect us, not a walk-in response.
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Ready when you are
Sunnyvale Garage Door Pros repairs and installs garage doors, springs and openers in Sunnyvale, CA and the surrounding area.
