Torsion, extension or enclosed: which springs lift your garage door?
A Mount Holly garage door runs on one of three spring systems: torsion springs on a steel shaft above the door, extension springs stretched beside the horizontal tracks, or an enclosed torsion system sealed inside a steel tube. Each one is identified from the floor, without touching it.
Springs are the counterbalance of the door: they carry its weight so that an opener, or one hand, moves it. Stand inside the garage with the door closed and the opener idle, and look up. The table reads left to right, from where the spring sits to what the technician replaces. The guide to torsion versus extension springs compares the two common designs part by part.
| Spring system | Where to look | What a failure looks like | What the technician replaces |
|---|---|---|---|
| Torsion | One or two coiled springs on a steel shaft across the top of the opening, with a cable drum at each end of the shaft. | A gap that splits one coil in two, a loud bang from the garage, a door that feels heavy or stops a few inches up. | The broken spring, and its partner on a two-spring door, then the door is balanced. |
| Extension | Two long springs above the horizontal tracks, one on each side, running from a pulley near the door toward the back of the garage. | A spring hanging loose or stretched open, one side of the door sitting lower, a door that jerks as it opens. | Both springs as a pair, matched by their color code to the door’s weight, plus the safety cable through each spring, fitted new where one is missing. |
| Enclosed torsion | A smooth steel tube across the top of the opening, with no coil in sight. | A door that will not rise or feels heavy, with nothing visibly broken. | The spring inside the tube; technicians service enclosed systems, such as TorqueMaster-style tubes, with parts made for them. |
Heard a bang, or see a spring in two pieces? Leave the door closed, keep the opener unplugged, and Call (833) 752-1196. The phone line never closes, weekends included.
What does an extension-to-torsion conversion change on an older door?
A conversion swaps the two extension springs beside the tracks for a torsion spring on a shaft above the door, and every technician does it on request. The door ends up on the system most newer sectional doors use, with the springs sized to its measured weight.
The conversion suits the extension-spring doors common on older Mount Holly homes, especially when a spring has already snapped. It adds a shaft, a drum at each end and a center bracket, so the framing above the opening has to take the new load. Doors that stay on extension springs keep a safety cable through each spring; the technician fits any that is missing. The conversion is priced before it starts, and the work goes ahead only when you say yes.
Why does a door with two springs get both replaced?
Both springs on a two-spring door are replaced together because both have carried the door through the same number of open-close cycles, so the surviving spring has little of its rating left. Two equal springs also share the load, which keeps the door level in its tracks.
The count depends on the system. A torsion door carries 1 or 2 springs on its shaft, sized to the door’s weight. An enclosed torsion system uses 1 spring on a single door and 2 on a double. An extension door always has 2, one per side, and DASMA’s color code for extension springs marks the door weight each pair is made to lift, from 50 to 300 lb in 10 lb steps.
A mismatched pair pulls one side of the door harder than the other, which wears the cables and rollers on the weaker side. That is why torsion and extension spring replacement starts with the door’s weight and size, not with the broken spring alone.
How many cycles is a garage door spring rated for?
A standard garage door spring is rated for 10,000 cycles, and one cycle is one opening plus one closing. High-cycle springs are rated from about 25,000 to more than 100,000 cycles, and they suit a door that serves as the family’s main entrance.
- Standard rating
- 10,000 cycles, the industry minimum for a torsion spring.
- High-cycle rating
- About 25,000 to more than 100,000 cycles; technicians stock high-cycle springs, so the choice is made at replacement.
- 4 cycles a day
- A door opened and closed 4 times a day runs 1,460 cycles a year.
- Matched pair
- Both springs on a two-spring door carry the same rating, so they are replaced together.
A rating is a count of cycles, not a date, so a busy household reaches it sooner than a quiet one. The choice between standard and high-cycle springs is made before the work starts, with the price of each. Read spring cycle ratings explained for how ratings are measured.
What happens to the lift cables when a spring snaps?
A snapped spring drops the tension that keeps the lift cables tight on their drums or pulleys, so a cable often slips off, tangles or frays at the same moment. The door then hangs crooked or jams in its tracks, and the cable and the spring are repaired on the same visit.
Lift cables are the steel cables that run from the bottom brackets, the steel corners at the base of the door, up to the drums on a torsion shaft or over the pulleys of an extension system. They, the springs and the bottom brackets all hold the door’s weight under tension. Three things wait for the technician:
Running the opener
The opener pulls against a door it cannot lift and drags a slack cable further off its drum.
Pulling the release on an open door
A door with a broken spring drops when the trolley lets go.
Touching springs, cables or brackets
Each one stores the door’s weight, and a loosened part releases it at once.
The page on the risks of replacing springs yourself explains why this is technician work. A technician handles cable repair after a spring breaks, then balances the door and runs the auto-reverse test before leaving.
What do Mount Holly’s two housing eras mean for its garage door springs?
The median Mount Holly home dates from 1999, yet 31.9% of homes were built before 1980 and 25.3% in 2010 or later. Older garages are the ones more likely to keep extension springs, so the spring system changes from one street to the next and the technician confirms it on every visit.
- Median year built
- 1999 in Mount Holly and 1982 across Gaston County (ACS 2020-2024 5-year).
- Built before 1980
- 31.9% of Mount Holly’s housing units, including 10.0% built before 1950 (ACS 2020-2024 5-year).
- Built in 2010 or later
- 25.3% of Mount Holly’s housing units (ACS 2020-2024 5-year).
- Owner-occupied
- 68.8% of occupied homes in Mount Holly and 66.8% across Gaston County (ACS 2020-2024 5-year).
Mount Holly takes its name from the Mount Holly Cotton Mill, started in 1875, and was incorporated in 1879 on the west bank of the Catawba River. Its population grew from 13,656 in 2010 to 17,703 in 2020 (U.S. Census), and homes from both eras now share the same city limits.
How is Mount Holly garage door repair priced, spring by spring?
A Mount Holly repair is priced by the spring system, the number of springs, the door’s weight and size, any cable or drum damage from the break, and the cycle rating you choose. The price is stated before a spring is ordered, and the visit carries no trip fee.
Spring system
Torsion, extension and enclosed torsion springs use different parts and hardware.
Spring count and door weight
A heavier or wider door needs heavier springs, and two-spring doors get a matched pair.
Related damage
A spring that broke under load often leaves a frayed cable or a worn drum behind.
Cycle rating
High-cycle springs cost more than standard springs and run more cycles.
Third-party figures for each spring type are on the page for garage door spring replacement prices.
When does a technician arrive for a spring call?
Calls booked by 12 pm, Monday to Saturday, get a same-day inspection visit in Mount Holly, including a door stuck open by a broken spring. The technician inspects the spring system, names the price and waits for your yes.
Emergency service runs 24/7, so a spring that snaps overnight gets a technician too. A written service record is left after the work, and photos of the broken spring sent before the visit let the technician bring matching parts.
Mount Holly, the Catawba River side of Gaston County, and nearby towns
Technicians who work in Mount Holly also cover its downtown, the Gaston County shore of Mountain Island Lake and the Gaston County towns around it:
- Downtown Mount Holly
- Belmont
- Stanley
- Lucia
- Mountain Island Lake
- Lowell
- McAdenville
- Cramerton
Service visits cover this Mount Holly zip code:
- 28120
About 12 miles southwest, homeowners call for Gastonia garage door service. Across the Catawba River in Mecklenburg County, see Charlotte garage door technicians.