Torsion vs. Extension Springs: What’s the Difference and Which Do You Have?
Every garage door relies on springs to counterbalance its weight, but not all springs work the same way. Knowing which type you have — and why it matters — can help you understand your door better and know what to expect when it’s time for a repair.
Torsion Springs
Torsion springs mount horizontally on a metal shaft directly above the closed door, usually centered over the opening. As the door moves, the spring winds and unwinds, using torque to lift the door smoothly. Torsion springs are more common in newer and heavier doors because they offer better balance, a longer lifespan, and a more controlled, even motion.
Extension Springs
Extension springs run along the horizontal tracks on either side of the door, stretching and contracting as the door opens and closes. They’re typically found on older or lighter doors and cost less upfront, but tend to wear out faster and provide a slightly jerkier motion compared to torsion springs.
How to Tell Which One You Have
Look up at your closed garage door from inside. If you see a single spring on a shaft running across the top of the door, that’s a torsion spring. If you see two long springs running along the upper tracks on either side, parallel to the door itself, those are extension springs.
Why This Matters for Repairs
Torsion and extension springs fail differently and require different replacement parts and techniques, so it’s important your technician knows exactly what you have before showing up. Springs are also under extreme tension — this is one repair we always recommend leaving to a professional rather than attempting yourself.
How Long Do Springs Last?
Most springs are rated for 10,000 to 15,000 open-close cycles, which translates to roughly 7-12 years for an average household. If your springs are original to an older door, or you’re hearing new noises during operation, it may be time for an inspection.
Not sure what type of spring you have, or think yours might be on its way out? Call us at 425-321-1978 and we’ll take a look.
