The Symptom
The door won't lift, or it lifts six inches and stops. Maybe it slams down the last two feet instead of easing shut, or the opener strains and clicks off before the door clears the floor. Nine times out of ten that's a torsion spring that's lost its wind, or one of a pair that's snapped clean and left its partner carrying a load it was never built for.
In Derry, where median household income sits around $88,901, this repair almost always lands on the right side of the repair-or-replace line. A spring swap runs a fraction of what a full door replacement costs, and on a door that's otherwise sound - track straight, panels not rusted through - there's no reason to replace the whole unit just because the spring gave out. Replacement only makes sense when the door itself is failing: bent track, rotted wood panels, an opener and spring both shot at once. If you're not sure which camp your door falls into, that's a five-minute look, not a guess over the phone.
Why This Fails Locally
Derry's housing stock centers on a median build year of 1981, which puts a lot of doors on torsion hardware from a design era before manufacturers standardized spring winding and drum sizing the way they do now. Those early-80s torsion setups often used a single spring sized tighter to the door weight, with less margin before fatigue sets in - so when one goes, it tends to go hard and all at once rather than gradually losing lift.
New Hampshire's cold climate band adds to the wear. Steel springs cycle through hard freezes and summer humidity every year, and the metal doesn't forgive that range forever. A spring rated for a certain number of cycles in a mild climate gets there faster here. Combine a 40-plus-year-old torsion spring with a few thousand freeze-thaw cycles and the failure point isn't a surprise - it's overdue.
Time on the Job
A straightforward torsion spring swap
One spring or a matched pair, no complications with the drum, cable, or bent shaft - is usually a job measured in an hour, not a day. We travel the roughly 11 miles from Manchester to reach Derry, so the drive is part of the visit, not an extra trip. If the spring failure has also damaged the cable, bent the track, or thrown off the opener's travel limits, that adds time on site, and we'll tell you that before we start rather than after.
- 11 miles
We don't keep a branch in Derry
Every job here is a dispatch from Manchester, which means we schedule by route rather than promising a same-hour arrival. If timing is tight, say so when you call and we'll tell you honestly where that visit falls in the day.
Parts We Carry
We stock standard torsion springs sized for common residential door weights - single and double doors, the sizes that cover most of what's on Derry's 1981-median housing stock. What we don't keep on the truck is anything oversized or custom-wound for a door that's been modified or isn't standard width; that's a special order, and we'll say so up front rather than make you wait on site while we figure it out.
We carry matched spring pairs for double doors, since replacing only the failed one and leaving the old partner in place just moves the next failure a few months down the road. Cables and drums that show wear get flagged too - a spring under load that's paired with a frayed cable is a second call waiting to happen.
How We Fix It
We unload the spring, check the drum and cable for wear, and measure the door's weight and wind to match the replacement to the opening - not just swap in whatever was there before, since the original spring may have been undersized to begin with. On double doors we replace both springs even if only one failed, for the reason above: uneven springs on a shared door put a twist into the track that shows up as a new problem later.
Once the new spring's set and wound to the door's balance point, we run it through several open-close cycles by hand before touching the opener, checking that the door holds position at any point without the motor fighting it. Then we test it with the opener engaged and make sure the travel limits and auto-reverse are still set correctly - a spring change can throw those off even when nothing else was touched.
Booking a Visit
If your door in Derry is slamming, stuck partway, or the opener's straining against dead weight, that's a spring call, not a guessing game
Tell us what the door's doing - stuck up, stuck down, slammed shut, one side lower than the other - and we can usually tell you over the phone whether it's a spring or something else before a truck ever leaves Manchester.
See the Derry service area page for what else we cover out this way
Or check the Manchester spring repair page for the service overview that applies across the whole area.
