2026-07-21 7 min read
Your garage door relies on one critical component to lift a 300 to 400 pound door dozens of times per year. Most homeowners in Belmont have either torsion or extension springs, but few know which type they own or why it matters. Understanding the difference could save you hundreds on repair costs and keep your door working safely today.
Garage doors use two entirely different spring systems. Each works by storing and releasing energy, but the mechanics and failure modes differ dramatically.
Torsion springs wind tightly around a metal shaft above your door opening. When the door closes, these springs coil tighter, storing massive amounts of tension. When you open the door (or your opener does), that tension releases and helps lift the weight. Torsion springs typically last 7 to 9 years with normal use.
Extension springs hang vertically on both sides of your door. They stretch and contract like a rubber band as the door moves up and down. Extension springs pull the door open through a pulley system. They also last roughly 7 to 9 years, but they fail differently than torsion springs.
I've responded to countless emergency calls across Belmont and surrounding areas like Oakland where a single spring failure left homeowners completely stuck. The good news: knowing your spring type helps you recognize problems early.
Torsion springs store extreme energy in a compact space. When one snaps, the door can come crashing down without warning. This is genuinely dangerous. A falling garage door can cause serious injury or property damage. Extension springs fail more gradually in many cases, but they also store dangerous energy.
Here's what most people don't realize: the cost to replace torsion springs typically runs $200 to $400 per spring, while extension springs range $100 to $150 each. Most residential doors have one torsion spring or two extension springs. That's a meaningful price difference, and it affects your repair estimate significantly.
**Need garage door springs in Belmont today?** Call (510) 402-2235. we cover same-day service across the area.
When you call for a free estimate, tell us which type you think you have. We'll confirm and give you an honest cost breakdown before any work begins.
Walk into your garage and look up at the space directly above the closed door.
Do you see a tightly wound coil wrapped around a horizontal shaft? That's a torsion spring. The shaft runs the full width of your door, and the spring sits centered above the opening. Torsion springs are heavier and more compact than extension springs.
Do you see springs hanging vertically on either side of the door? Those are extension springs. They typically run parallel to the horizontal tracks and attach near the top corners.
Still unsure? Extension springs have pulleys and cables. Torsion springs have end bearings and a more industrial look. Both systems include safety cables to catch a failing spring, though extension springs more obviously feature visible steel cables running alongside the springs themselves.
If you've already noticed a snapped spring or warning signs like grinding noises, don't wait. A broken spring means your door won't open or close safely.
A snapped torsion spring creates an immediate problem. The door becomes nearly impossible to open because all the weight shifts to your garage door opener. Openers are designed to support the door with springs doing the heavy lifting, not to lift the full weight alone. You'll hear the motor strain or the opener will stop entirely.
Extension spring failure often feels less dramatic at first. The door might open unevenly or feel heavier on one side. But it's equally critical to address. If both extension springs fail, you're in the same stuck situation as a broken torsion spring.
The real danger: many homeowners try to force a broken-spring door open using the manual release. This can cause the door to fall unexpectedly. Never do this. Contact a professional instead.
Schedule a same-day service call at Garage Door Company Belmont. We diagnose the problem, quote the repair on the spot, and fix it while you wait in most cases.
Springs don't last forever. At 7 to 9 years of normal use, both torsion and extension springs weaken. Cycles matter. If you open and close your door 4 times daily, that's roughly 1,500 cycles per year. Heavy use accelerates wear. The Bay Area climate, with its moisture and salt air near the coast, can corrode springs faster too.
Check our guide to protecting your door from moisture and salt air for longer component life.
Know your spring type. If your door is over 8 years old, consider proactive replacement before failure strands you. Call (510) 402-2235 for a free estimate on new springs, or contact us online to get a same-day estimate.
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Can I replace just one garage door spring? Yes, but we typically recommend replacing both springs at the same time. Springs degrade together, so the remaining spring will likely fail soon after. Replacing both now prevents a second emergency call in weeks.
How much does it cost to replace garage door springs in Belmont? Torsion springs run $200 to $400 each; extension springs cost $100 to $150 each. Labor adds $100 to $200 depending on complexity. Total: expect $400 to $700 for most residential replacements.
Can I replace garage door springs myself? No. Springs store dangerous energy that can cause serious injury or death if released incorrectly. Professional installation is essential and much safer.
How do I know if my spring is about to snap? Listen for loud grinding or squeaking. Watch for uneven door movement, visible rust, or fraying safety cables. See our warning signs post for the full checklist.
What's the difference in durability between torsion and extension springs? Both last 7 to 9 years. Torsion springs are generally more durable and reliable, which is why many newer homes use them. Extension springs are common in older installations.