2026-08-23
Here's what most homeowners don't realize about garage door springs: not all springs are created equal, and the type you have determines everything from repair cost to how long you'll wait for a fix. After 15 years on service calls across Redwood City and the Peninsula, I've seen confusion cost people real money. The two main types are torsion and extension springs, and understanding the difference could save you time, money, and a whole lot of headache.
Torsion springs are mounted horizontally above your garage door opening. They twist and wind as your door opens and closes, storing energy like a coiled spring. Most residential garage doors in Redwood City built in the last 20 years use torsion springs because they're safer, more durable, and provide smoother operation. See our guide on smart garage door technology in redwood city: wifi installation & setup guide.
A single torsion spring typically lasts 7 to 9 years under normal use. They handle about 10,000 cycles (one open/close cycle counts as two), which works out perfectly for a family opening their door 3 to 5 times daily. When a torsion spring snaps, you'll hear a loud bang. The door won't open without help because the spring carried roughly 400 pounds of tension. That's why a snapped spring isn't something to ignore or DIY.
Extension springs hang vertically on both sides of your door. They extend and contract to support the weight. Older homes and smaller garage doors often use this design. They're cheaper upfront but wear faster, typically lasting 4 to 7 years. Extension springs are also more prone to sudden failure because they work harder individually. Read about weather stripping & seals in redwood city: stop energy drafts before winter.
When an extension spring fails, you lose support on one side. The door may stick or bind. Since there are usually two springs working together, you might still get partial operation, unlike a torsion failure.
**Need garage door springs in Redwood City today?** Call 626-635-2537. we cover same-day service across the area.
Torsion springs cost more upfront (usually $200 to $400 per spring, installed), but their longevity makes them the better investment. Extension springs run $150 to $250 installed, yet you'll replace them sooner. Garage Door Redwood City frequently replaces both types, and we always recommend torsion if your door supports it because the math favors reliability over time.
The estimate for spring replacement depends on what we find during inspection. A straightforward torsion spring swap takes 1 to 2 hours. If your door is severely out of balance or has cable damage alongside the spring issue, the cost climbs. That's why we never guess. You get a transparent estimate before we touch anything.
Your garage door springs are under constant load. Every single day they're holding 200 to 400 pounds of weight. Over months and years, metal fatigues. Rust from coastal Redwood City salt air accelerates wear on both types. If you haven't had a tune-up recently, your springs could be closer to failure than you think.
Check our garage door maintenance checklist for Redwood City to see if your door is showing early warning signs. Catching a weak spring before it snaps saves you emergency fees and keeps your door operating safely. You can also read about signs you need spring replacement now for more specific indicators.
If you're unsure which type you have, or if a spring recently failed, don't wait for a second failure. Spring problems compound. A failed torsion spring puts extra stress on your opener and cables. An extension spring failure unbalances the whole system. Visit our spring repair and installation services to learn what we can do, or schedule a free quote and we'll inspect your door in person.
Most repairs happen same-day in Redwood City and nearby areas. We'll tell you which spring type you have, how much life is left, and exactly what it costs to fix.
Don't ignore the bang. Spring failure isn't a "wait and see" problem. Call us at 626-635-2537 or reach out today to book your inspection.
Can I replace just one spring if I have two? Technically yes, but not recommended. If one spring failed, the other is close behind. Both springs age together. Replacing only one leaves you vulnerable to another failure in weeks. Most techs replace both to avoid a second service call.
How do I know if my spring is torsion or extension? Look above your door opening. Torsion springs run horizontally across the top, usually one thick spring. Extension springs hang vertically on the left and right sides. When in doubt, call us rather than guess.
Can I replace garage door springs myself? Springs are extremely dangerous. They store hundreds of pounds of tension. A slip can cause serious injury or death. Always hire a licensed technician. DIY attempts often cost more in emergency repairs than professional replacement.
What happens if a spring breaks while the door is open? If your door is fully open, it's usually stable. If it's partially open, the door may drop suddenly and damage property or injure someone below. Never leave a door with broken springs in a raised position.
How much does spring replacement cost near Redwood City? Torsion springs run $200 to $400 installed per spring. Extension springs cost $150 to $250. Exact pricing depends on door size, spring type, and whether cables need replacement. We provide free estimates.