Garage Door Springs in Alstead: Torsion vs. Extension (Which Do You Have?)
2026-07-29 7 min read
After 15 years turning wrenches on garage doors across Alstead and the surrounding towns, I can tell you the number one question homeowners ask when a spring fails is simple: "What exactly broke?" Let me cut through the confusion about garage door springs and help you understand what's actually holding up your door.
Your garage door weighs between 300 and 500 pounds. Those springs aren't just there for show. They counterbalance that weight so your opener doesn't have to do all the heavy lifting. But not all springs work the same way, and knowing which type you have matters when something goes wrong.
Torsion Springs: The Most Common Setup
Most homes in Alstead use torsion springs. These are mounted horizontally above your garage door opening, usually on a metal shaft that runs across the top of the frame. When you open the door, the springs twist (hence "torsion") and store energy that helps lift the door smoothly.
Torsion springs typically last 7 to 9 years with normal use, though that timeline can shift depending on how often you open and close the door. If you're opening it five times a day, you're looking at the shorter end. If it's once or twice daily, you might stretch it closer to 10.
Here's what matters most: when a torsion spring snaps, the whole door becomes dangerous. The shaft can whip, the spring ends can fly, and the door can crash down without warning. This is why I always tell homeowners that torsion spring replacement isn't a DIY project. If you've already been thinking about this, our guide on garage door spring replacement in Alstead covers why DIY costs more than calling us.
Extension Springs: Less Common, But Still Out There
Extension springs run along each side of the door opening, parallel to the tracks. Instead of twisting, they stretch and contract as the door moves up and down. You'll recognize them by the pulley system at the end of each spring.
Extension springs have a shorter lifespan than torsion springs, usually 5 to 7 years. They're also slightly less stable because they work independently on each side. If one fails, the door can tilt or bind in the tracks.
The good news: extension springs are typically cheaper to replace than torsion springs. The challenge is that most modern garage doors are built with torsion systems, so if you have extension springs, your door is probably older.
**Need garage door springs in Alstead today?** Call (978) 391-2417. we cover same-day service across the area.
How to Tell Which Type You Have
Look at the top of your garage door opening from inside the garage. If you see a horizontal metal shaft running across the very top with coiled springs wrapped around it, you have torsion springs. If you see springs running vertically along each side of the opening with pulleys and cables, those are extension springs.
When you're trying to figure out cost and repair timelines, knowing which type matters. Our full breakdown on garage door springs in Alstead covers repair versus replacement decisions in detail, including what you should expect to pay.
What Happens When a Spring Fails
A snapped spring doesn't mean your door is stuck forever. It means your opener is now trying to lift 300 to 500 pounds with no spring assistance. Most openers can't handle that. The door either won't open at all, or it opens a few inches and stops.
Never force it. Never try to lift it manually if you're unsure. Call us for a same-day estimate and we'll get you back in business fast. When you schedule a free quote with Garage Door Alstead, mention whether your door is stuck open, stuck closed, or partially open. That detail helps us arrive prepared.
The Winter Factor in Alstead
Cold weather makes springs brittle. If you live in Alstead, you know our winters are real. Metal contracts in the cold, and springs that were fine in October might snap on a freezing morning in January. That's why we see clusters of spring failures every winter. If your door is more than five years old and it's getting close to fall, now's the time to schedule preventive maintenance.
When to Replace Both Springs at Once
Here's advice I give every homeowner: replace both springs together, even if only one has failed. The second spring is likely at the end of its life too. Replacing both at once costs a bit more upfront but saves you a second service call and another frustration six months down the road.
If you're trying to understand the full financial picture, our garage door cost and pricing guide for Alstead breaks down what you'll actually spend.
The bottom line: springs fail. It's not a matter of if, but when. Knowing what type you have, how old they are, and what to expect helps you stay ahead of emergency situations. If your door isn't opening smoothly or you hear creaking sounds from the spring area, don't wait. Call (978) 391-2417 and get a technician out to assess what's happening before something breaks completely.
Frequently Asked Questions
How long do garage door springs last? Torsion springs last 7 to 9 years with normal use. Extension springs last 5 to 7 years. Lifespan depends on door frequency, climate, and maintenance. Cold Alstead winters can shorten these timelines.
Can I replace a garage door spring myself? No. Springs are under extreme tension and can cause serious injury or death if they snap during removal. Professional replacement is the only safe option, and it takes less than an hour.
How much does a spring replacement cost? Torsion spring replacement typically runs $250 to $400 per spring. Extension springs are usually $150 to $250 per spring. Call us for a free estimate specific to your setup.
What causes a garage door spring to snap? Age, wear cycles, cold weather, and lack of maintenance are the main culprits. Springs simply fatigue over time and lose their ability to hold tension.
Should I replace one spring or both? Always replace both springs together. If one has failed, the other is close behind, and you'll avoid a second service call and expense within months.