Garage Door Springs in Duarte: Torsion vs. Extension (Which Do You Have?)
2026-07-16 7 min read
Most homeowners in Duarte don't know they have two different types of garage door springs until one fails. Torsion springs sit above the door and twist to lift it. Extension springs run along the sides and stretch. This distinction matters because they fail differently, cost different amounts to replace, and require different safety approaches.
What Are Torsion Springs?
Torsion springs are the heavy lifters. They're wound metal coils that sit on a rod above your garage door opening. When you press the opener button, the spring twists and unwinds, creating the rotational force that lifts your 300+ pound door with minimal effort from the motor. See our guide on commercial garage doors in duarte: what business owners need to know.
Here's what makes them special: they handle the weight directly. No pulleys, no cables wrapping around drums. Just pure mechanical advantage through tension and torque. Most modern residential garage doors in the San Gabriel Valley use torsion springs because they're smoother, quieter, and safer than their older cousins.
Torsion springs typically last 7 to 9 years with normal use. That's roughly 10,000 to 15,000 cycles (up and down). When one snaps, the door becomes a dead weight. You'll hear a loud bang from the garage, and your opener won't budge the door. Read about garage door safety testing in duarte: why photo eye & auto-reverse matter.
What Are Extension Springs?
Extension springs are the older style, still found on some Duarte homes. They're long, coiled springs that run horizontally along both sides of the door, above the track. As the door goes up, the springs stretch. As it comes down, they contract and help ease the door down gently.
The trade-off: they're cheaper upfront but less durable. Extension springs fail more frequently than torsion springs because the constant stretching and contracting fatigues the metal faster. When one breaks, the door becomes unbalanced and won't open evenly.
Safety is another difference. Extension springs use a cable running through them. If a spring snaps, that cable is supposed to catch it and prevent the spring from whipping across your garage. It doesn't always work. Torsion springs are contained above the door, making them inherently safer.
Why the Type Matters When You Need a Repair
If you have a snapped spring, the type determines your next move. A broken torsion spring usually means a same-day service call. The repair involves removing the broken spring, installing a new one, and rebalancing the door. It's straightforward but requires proper tools and experience.
A broken extension spring is trickier. Both springs need to be replaced together, even if only one snapped. Mismatched springs cause the door to bind and wear unevenly. This is why getting an accurate estimate matters. Many homeowners call thinking it's a simple fix and discover the labor is more involved than expected.
For details on what these repairs actually cost in Duarte, check our guide on garage door springs and replacement costs. If you're dealing with an emergency right now, we also cover what to do when a spring snaps.
**Need garage door springs in Duarte today?** Call (626) 562-0493. We cover same-day service across Duarte and the surrounding area.
How to Know Which Type You Have
Walk into your garage. Look above the door opening. Do you see a horizontal rod with coils wound around it? That's torsion. Do you see two long springs running along the left and right sides of the opening, parallel to the tracks? Those are extension springs.
When in doubt, take a photo and text it to us. Don't poke or touch the springs under any circumstance. A spring under tension can cause serious injury if it releases suddenly.
When to Call a Professional
Spring replacement isn't a DIY job. Springs are under extreme tension. A slip, a wrong tool, or one second of lost focus can cause a nasty injury. In 15 years on the truck, I've seen people hospitalized for trying to shortcut spring work.
If you notice a snapped spring, a door that opens unevenly, or you hear a loud bang followed by the door not opening, stop using the door immediately. Call us for a free estimate. We'll diagnose which type you have, explain the repair, and give you an honest cost upfront.
Our team at Garage Door Duarte handles both torsion and extension spring replacements. We also offer complete spring service details if you want to learn more about preventive maintenance.
Frequently Asked Questions
How long do garage door springs typically last? Torsion springs last 7 to 9 years, or roughly 10,000 to 15,000 cycles. Extension springs usually fail sooner, often at 5 to 7 years. Lifespan depends on usage frequency, climate, and maintenance.
Can I replace just one spring if one snaps? No. For extension springs, always replace both together to maintain balance. For torsion springs, a single replacement is standard, but we'll inspect the other spring during service.
What's the average cost to replace garage door springs in Duarte? Torsion spring replacement typically runs $200 to $300 including labor. Extension springs usually cost $150 to $250 per pair. Get a free estimate by calling (626) 562-0493.
Is it safe to use my garage door if one spring is broken? No. A broken spring removes the mechanical advantage the opener relies on. The motor will strain, and the door may fall suddenly. Don't use it until it's repaired.
Why do springs fail? Metal fatigue from repeated stretching and contracting is the main cause. Rust, lack of lubrication, and extreme temperature swings in Southern California also accelerate wear.