Mostly, it’s just time. Garage door springs are rated for a set number of cycles, usually 10,000 to 15,000 open-and-close cycles. Run your door twice a day, and you’ll hit that number in 7 to 12 years.
The main causes
Normal wear
Every open and close stretches or twists the spring a little. Eventually, metal fatigue wins. There’s no way around this one. It’s physics, not bad luck.
Rust and corrosion
Moisture weakens the coil. Garages near humid basements or without good ventilation see this more. A rusted spring can snap well before its expected lifespan.
Lack of lubrication
Dry springs create more friction, which adds stress to the coil every time the door moves. A yearly coat of garage door lubricant (not WD-40, it evaporates too fast) actually extends spring life.
Wrong spring for the door
If a spring was installed with the wrong tension for your door’s weight, it wears out faster than it should. This happens more than people think, especially after a DIY door swap where the original springs got reused.
Temperature swings
Cold weather makes metal more brittle. That’s part of why spring failures spike in winter. The metal contracts, tension increases, and an already-worn spring gives out.
Can you prevent a spring from breaking?
Not permanently. But you can catch it before it snaps at the worst possible moment. Visible gaps in the coil, rust, or a door that suddenly feels heavier are all warning signs worth acting on.
If your spring already broke, local Indianapolis technicians can usually replace it same-day.