2026-09-21 5 min read
Serving Brookline, we see this problem again and again: homeowners don't know what type of garage door springs they have, so they can't talk intelligently with repair companies or understand why a replacement costs what it does. The answer is simple. Most homes use either torsion springs (mounted above the door on a metal shaft) or extension springs (running along the sides). The type you have determines repair complexity, lifespan, and cost. Know your spring type, and you're already halfway to making the right decision.
Torsion springs wind up like a clock spring, storing mechanical energy as they twist. When you open the door, that tension unwinds to help lift the heavy panel. They're mounted horizontally above the garage door opening, threaded onto a steel rod.
Why do most Brookline homes have them? Torsion springs are safer, more durable, and last longer than extension springs. A quality torsion spring typically lasts 7 to 9 years with normal use, or roughly 10,000 to 15,000 cycles. They also provide smoother, more balanced lifting, which reduces strain on your garage door opener.
The trade-off is cost. Torsion springs are more expensive to replace than extension springs, and installation requires precise adjustment and specialized tools. This is not a DIY job. A poorly installed torsion spring can snap suddenly, causing the door to fall or the spring to whip around with dangerous force.
Extension springs work differently. They stretch and contract like rubber bands, extending along the left and right sides of your door frame. When the door opens, they stretch. When it closes, they contract and help pull it down.
Extension springs cost less to replace than torsion springs, but they wear out faster. Most last 5 to 8 years. They also create an uneven lift, putting more stress on your opener and door tracks over time. If one snapped spring isn't replaced immediately, the other side bears double the load and fails soon after.
Extension springs pose a real safety concern. When a snapped spring fails, there's nothing to slow the door's fall. If you have extension springs and notice one has broken, call a professional immediately. Learn more about the real risks and emergency steps in our guide to snapped garage door springs in Brookline, including emergency help and same-day cost.
Stand inside your garage and look directly above your door. Do you see a tightly wound metal coil running horizontally across the top? That's torsion. Do you see springs running vertically along the sides of the door frame? Those are extension springs.
Torsion springs sit on a horizontal rod and look like compressed coils. Extension springs look more like stretched metal cables or long spirals.
If you're still unsure, take a photo and call a local professional. They can identify your system in seconds.
**Need garage door springs in Brookline today?** Call (617) 446-3026. We cover same-day service across the area and can provide a free estimate over the phone.
A single broken torsion spring usually means replacement, not repair. Springs work in pairs (even if only one is broken), and replacing just one throws your door balance off. Most professionals recommend replacing both springs at once, even if only one has failed.
For extension springs, the same logic applies. If one snaps, the other is likely near the end of its life. Replacing both ensures you won't face another emergency repair in a few months.
Not sure whether repair or replacement makes sense for your door? We've covered this in detail at garage door springs repair vs. replace: when and cost.
A torsion spring replacement typically costs more than extension spring replacement because the work is more complex and requires specialized knowledge. Your exact cost depends on your door's weight, the spring type, and local labor rates across Brookline and nearby areas like Newton and Waltham.
Get a detailed estimate before work begins. We offer free quotes on spring replacement and repair. Call us at (617) 446-3026 or schedule a free quote online to see what your specific repair or replacement will cost.
Knowing your spring type puts you in control. Torsion springs are safer, last longer, and cost more upfront. Extension springs are cheaper but fail sooner and create safety risks. Either way, don't ignore a broken spring. A stuck door or sudden failure puts your family at risk and can damage your opener.
If you're experiencing a snapped spring or just want to understand your door better before something breaks, reach out today. Call (617) 446-3026 or contact us for a same-day estimate.
How long do garage door springs last? Torsion springs typically last 7 to 9 years or 10,000 to 15,000 cycles. Extension springs wear out faster, usually in 5 to 8 years. Lifespan depends on climate, frequency of use, and maintenance.
Can I replace just one broken spring? Not recommended. Springs work as a pair and wear at similar rates. Replacing only one creates an imbalanced door that strains your opener and tracks. Replace both at once for safety and longevity.
What's the difference in cost between torsion and extension spring replacement? Torsion springs cost more because installation requires specialized tools and precise adjustment. Extension springs are simpler but fail sooner. Get a free estimate to compare costs for your specific door.
Is a broken garage door spring an emergency? Yes. A snapped spring leaves your door without support, risking sudden collapse. Do not attempt to open or close the door manually. Call a professional immediately for safe removal and replacement.
Why are two springs used instead of one? Two springs distribute the load evenly, lifting the door smoothly and safely. A single spring would create imbalanced lift, damage tracks, and stress the opener. Redundancy also adds safety if one fails.
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