2026-09-19 5 min read
Serving Waltham, we see this problem again and again. A homeowner hears a loud bang from the garage, the door won't open, and they're stuck wondering what broke. Nine times out of ten, it's a snapped spring. But here's the thing: not all garage door springs are the same. Understanding whether you have a torsion spring or an extension spring changes how you fix it, how much it costs, and how safe the repair is.
Your garage door weighs 300 to 500 pounds. That weight has to go somewhere when the door opens and closes. Two main spring designs handle that load.
Torsion springs wind around a metal rod mounted above the door opening. They twist (torsion means twisting) to store and release energy. When the opener activates, the springs unwind, making the door feel lighter. Most modern homes built in the last 20 years use torsion springs. They're centered, symmetrical, and built to last 7 to 9 years under normal use.
Extension springs hang on either side of the door track. They stretch when the door closes and contract when it opens, pulling cables that help lift the door. Older homes, and some budget installations, use extension springs. They're less common in newer construction but you'll still find them in plenty of Waltham garages.
The key difference: a snapped torsion spring makes the door impossible to open safely. A snapped extension spring does too, but the failure mode looks different and the repair approach changes.
When a torsion spring breaks, the entire door weight transfers to your opener. The opener wasn't designed to carry that load. Try forcing it and you'll burn out the motor, or worse, the door could crash down unexpectedly. That's dangerous. Don't use the door.
With extension springs, you lose the mechanical advantage on that side. The door becomes unbalanced. Again, it's unsafe and stresses the opener.
Here's what you should know: never try to replace a garage door spring yourself. Springs are under extreme tension. A slip, a wrong move, and you're looking at serious injury. This is the one repair where a professional isn't optional. Our team at Garage Door Company Waltham handles snapped springs the same day you call, and we have the equipment and training to do it safely.
**Need garage door springs in Waltham today?** Call (857) 578-2028. We cover same-day service across the area.
The cost depends on which type you have and how many springs need replacement. A single torsion spring typically runs less than an extension spring pair because extension springs often work in tandem. Both types are relatively affordable compared to replacing the entire door, but the estimate varies.
Before you panic about cost, know this: most spring failures happen in isolation. You're not looking at a cascade of repairs. If your door is older, though, the second spring might be close behind. Many homeowners choose to replace both springs at once, even if only one snapped. That prevents a second emergency call six months later.
Same-day service matters because you can't safely use a broken-spring door. We'll come out, assess whether you have torsion or extension springs, give you an estimate, and get it fixed. No guessing. No waiting a week.
If you're curious about your current spring setup before anything breaks, our maintenance tune-up includes a full inspection. That way you're never surprised.
Springs don't last forever. They're wear items, like brake pads. Regular lubrication extends their life and keeps them quiet. If you hear squeaking or grinding, check our post on garage door spring noise in Waltham to learn what that means.
Avoid overusing the door. Every cycle counts toward the lifespan. Extreme temperature swings (common in New England winters) can weaken springs faster. If you're in Waltham or nearby towns like Newton or Watertown, the seasonal freeze-thaw cycle is real. That cold snap in January plus the thaw in March puts stress on metal springs.
Want to know more about whether your springs need replacement? Read when to repair versus replace your garage door springs for the full breakdown.
If your spring just snapped, don't use the door. Call us at (857) 578-2028 and schedule a free quote. We'll confirm whether it's torsion or extension, tell you the cost, and get it fixed fast. Most calls in Waltham get same-day or next-day service.
If your springs are still working but you want to be prepared, consider a maintenance tune-up. We'll check the condition, lubricate moving parts, and let you know if replacement is coming soon. Peace of mind is worth it.
How long do garage door springs last? Torsion and extension springs typically last 7 to 9 years with regular use. Some last longer if the door is used sparingly, but 7 to 9 years is the industry standard. Climate and maintenance affect lifespan.
Can I replace one spring if both are old? If only one snapped, technically yes. But if both are the same age, the second one may fail within months. Many pros recommend replacing both at once to avoid a second emergency call and service fee.
Why can't I replace the spring myself? Springs are under 200 to 300 pounds of tension. Improper removal or installation can cause serious injury, including broken bones or worse.
What's the difference in cost between torsion and extension springs? Torsion springs are generally slightly cheaper per unit, but you typically need one. Extension springs work in pairs, so you're replacing two. Total cost is often comparable, but your specific door and spring configuration determines the final estimate.
How do I know which type I have? Torsion springs sit horizontally above the door opening on a rod. Extension springs hang vertically on each side of the tracks. Look up inside your garage. If you see a metal rod with a spring wound around it, you have torsion. If you see springs on both sides running parallel to the tracks, you have extension springs.
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