2026-07-30 5 min read
Garage door springs fall into two main categories: torsion and extension. Torsion springs sit above your door and twist to lift it. Extension springs run along the sides and stretch to provide lift. Most homes in Marstons Mills use one or the other, and picking the wrong replacement is dangerous and expensive. Understanding which type you have prevents costly mistakes and protects your family.
I've responded to too many garage door emergencies where a homeowner tried installing the wrong spring type. A snapped spring is bad enough. Installing an incompatible replacement turns a repair into a hazard.
Torsion springs are wound tight and store enormous energy, roughly 10,000 pounds of force. When they fail, that energy releases violently. Extension springs hang loose but snap with equal danger. A broken extension spring can send the cable whipping across your garage. Either way, the door becomes a 300 to 400 pound weight that can fall without warning.
The spring type your door uses depends on your garage layout, door weight, and opening mechanism. You cannot swap them interchangeably. That's why we always verify the exact type before quoting any repair.
Torsion springs dominate residential installations across Cape Cod and Marstons Mills. They're centered above the door on a metal rod and rotate when the door opens or closes. As the spring unwinds, it transfers rotational force to the rod, which lifts the door smoothly.
Torsion springs last 7 to 9 years under normal use. They handle frequent opening and closing better than extension springs. One torsion spring can support a heavy door alone, so you need fewer of them. The tradeoff? Repair costs run higher because torsion springs require precise balancing and specialized tools.
If your door opens smoothly and quietly, a torsion spring likely powers it. These springs rarely make noise before failing. They simply wear out over time.
Extension springs stretch and contract like a slinky. They run parallel to the horizontal tracks on both sides of your garage. When the door descends, the springs extend. As the door rises, they contract and help lift the weight.
Most extension springs last 5 to 7 years. They're cheaper to replace than torsion springs and easier to install, which lowers labor costs. The downside? You need two of them to balance the door load. If one breaks, the other does too within months. Extension springs also require safety cables running through them. If the cable snaps or the spring breaks, the cable catches the spring and prevents it from whipping across the garage.
**Need garage door springs in Marstons Mills today?** Call 1-508-625-7483. we cover same-day service across the area.
Walk into your garage and look up above the closed door. Do you see a metal rod running horizontally across the top with a spring wrapped around it? That's a torsion spring.
Do you see springs running along both sides of the door, parallel to the horizontal tracks? Those are extension springs. They'll be coiled loosely, not wrapped tightly around a rod.
Still unsure? Take a photo and call us. Spring identification takes 30 seconds over the phone, and we can estimate costs immediately. Our team at Garage Door Marstons Mills has diagnosed thousands of spring systems and can often tell you what's needed before we visit your home.
Torsion spring replacement typically runs $200 to $400 per spring, plus labor. Extension spring replacement costs $100 to $200 per spring. Labor varies, but torsion spring work takes longer because of balancing requirements.
If you're facing a snapped spring and need a same-day estimate, we'll schedule a technician to inspect your door and provide exact pricing. Never guess at repair costs for springs. An undersized or wrong-type spring creates liability issues and safety risks that far outweigh the cost of professional installation.
For detailed pricing and repair timelines, explore our full garage door spring services.
Never attempt spring replacement yourself. The stored energy in a compressed spring can cause serious injury or death. Even a small mistake during installation unbalances your entire garage door system.
We've seen DIY attempts go wrong. A homeowner thinks they saved money, but the door crashes down, damages the opener, or worse, injures someone. That's why we recommend professional installation every time.
If your door moves slowly, makes creaking sounds, or you notice visible wear on the springs, schedule a free quote today. We'll assess both springs and advise whether repair or replacement makes financial sense. Same-day service is available for emergency situations across Marstons Mills and the surrounding area.
For families with young children, spring safety is critical. We've covered this in our guide to child safety and garage doors, which addresses additional hazards beyond springs.
If your garage door also has cable issues alongside spring wear, read our complete guide to cable repair to understand the full scope of potential problems.
How long do garage door springs last? Torsion springs typically last 7 to 9 years with standard residential use. Extension springs last 5 to 7 years. Lifespan depends on opening frequency, climate conditions, and maintenance habits.
Can I replace one spring without replacing the other? No. Springs wear together. If one snapped, the other is near failure. Replacing both prevents a second breakdown weeks later and ensures balanced door operation and safety.
What happens if my spring breaks while the door is open? The door won't close automatically. If it's a torsion spring failure, the door is stuck. Extension spring failure might allow slow descent. Never force a door with a broken spring; call a technician immediately.
Why is spring replacement so expensive? Torsion springs require precision balancing, specialized tools, and trained technicians. The danger level is high, and installation errors create safety hazards. Professional pricing reflects both expertise and liability.
Do I need both springs replaced at the same time? Yes, always. Replacing both ensures balanced operation and prevents premature failure of the remaining spring under increased load.