A sectional or roller door is heavy, often well over 80 kilograms once you account for panels, rollers and hardware. The motor does not lift that weight on its own. The springs do the heavy work by storing and releasing energy, counterbalancing the door so that it feels almost weightless through its travel. The opener simply nudges a balanced door along.
Torsion springs, mounted on a shaft above the door, wind and unwind with each use. Extension springs, running alongside the tracks, stretch and contract. Either way, the steel is flexed through a huge range of tension thousands of times, and metal that flexes repeatedly eventually fatigues.
Every time the door opens and closes, the spring's steel is stressed and then relaxed. Microscopic cracks form at the surface and slowly grow with each cycle until the remaining metal can no longer carry the load. At that point the spring fractures, usually with the loud bang owners describe. This is normal end-of-life behaviour, not a defect, and it explains why a spring can fail while the door is sitting still or even while closed.
Rust pits the surface of the steel and gives fatigue cracks an easy place to start. In the humid, salt-laden air common across the Gold Coast, an unprotected spring corrodes faster than it would inland. A lightly oiled spring sheds moisture and lasts noticeably longer than a dry, rusty one.
If a door is fitted with springs that are too light for its weight, every cycle pushes the steel closer to its limit. This often happens after a heavier insulated door is installed without upgrading the springs to match.
A technician rarely needs long to confirm a broken spring. The tell-tale sign on a torsion setup is a visible gap in the coil, where the spring has separated into two pieces. On extension springs, one side hangs loose or the door sits crooked. They will also check the wire size, the spring length and the door's weight to work out whether the original spring was correctly specified, because fitting another undersized spring simply repeats the failure.
Cycle count matters too. A spring rated for around 10,000 cycles used twice a day will last roughly a decade, while the same spring on a busy household opening the door six or eight times a day may last only a few years. Knowing the usage pattern helps a technician recommend a higher-cycle spring where it makes sense.


A wound torsion spring stores enough energy to break bones or worse if it releases unexpectedly. This is the single most dangerous part of a garage door for an untrained person to touch. If a spring has snapped, the safest response is to leave the door closed, avoid using the opener, and have the spring replaced by someone with the roller door repairs gold coast correct winding bars and experience. Attempting to lift a door with a broken spring by hand is also risky, as the full unbalanced weight can come down quickly.
Any broken spring, any door that has become suddenly heavy, and any visible gap in a torsion coil warrants professional attention. The same applies if the door is opening unevenly or no longer staying put when stopped midway, since these point to springs nearing the end of their life. Replacing them before they fail outright avoids the inconvenience of a door stuck at the worst possible moment.
It depends on cycles rather than calendar years. A standard spring rated near 10,000 cycles lasts about seven to ten years with average use, but heavy daily use can halve that.
Fatigue cracks grow over time, and the spring can reach its breaking point while at rest, often under the tension it holds when the door is closed.
On a two-spring door it is generally wise. Both springs share the same age and cycle count, so the second is usually close behind the first.
It is best not to. The door is unbalanced and far heavier than usual, which strains the opener and creates a risk of the door dropping.
A1 Garage Doors Gold Coast services homes and businesses across the Gold Coast and surrounding suburbs for repairs, replacements and installations. Contact details are below.
A1 Garage Doors Gold Coast
1 Waterford Court, Bundall, QLD 4217 Phone: (07) 5515 0277 Website: https://goldcoastgaragedoorrepair.com.au A snapped spring is the predictable end of a component that has done its job thousands of times, not a sign you did something wrong. Knowing that springs fail through metal fatigue, that corrosion and mismatched sizing speed the process, and that a wound spring is genuinely dangerous to handle puts you in a far better position to act early and safely. Watch for a door that drifts out of balance or grows heavier over time, keep the springs lightly protected against the coastal air, and leave the tensioned hardware to someone equipped to handle it.