2026-08-09 7 min read
When your garage door won't open or close smoothly, a worn spring is usually the culprit. Torsion and extension springs are the two main types keeping your door balanced and functional. Understanding which type your door uses, how they differ, and when to replace them will save you money and frustration down the road.
Torsion springs sit horizontally above your garage door opening. They twist and unwind to lift the door's weight as it rises. Most modern homes use torsion springs because they're more durable, quieter, and safer than their counterparts. A torsion spring typically lasts 7 to 9 years with normal use.
Extension springs run vertically on both sides of the door frame. They stretch when the door closes and contract when it opens. While cheaper upfront, extension springs wear out faster and can snap more suddenly, which is why many newer installations skip them entirely.
If you're unsure which type your door has, look above the opening. Torsion springs run across the center; extension springs hang beside the tracks.
Your garage door weighs between 300 and 500 pounds. Springs counterbalance that weight so your opener only needs to lift about 10 pounds of actual force. Without functioning springs, your motor works overtime and fails prematurely.
Torsion springs distribute stress more evenly across their coils. A snapped spring in this system means the door becomes immobile immediately. Extension springs fail one at a time, allowing partial operation temporarily, which can feel misleading. Many homeowners think they have more time than they actually do.
Both types operate under extreme tension. Never attempt DIY replacement. Even experienced mechanics respect spring work because a broken spring can cause serious injury.
New Hampshire winters are brutal on garage doors. Freezing temperatures make metal brittle. Spring failure rates spike between December and February. Our cold climate demands springs rated for frequent cycling and temperature swings.
For homes in Swanzey and nearby towns like Keene, I recommend torsion springs over extension types. The upfront cost is higher, but longevity saves money over time. Torsion springs handle our seasonal stress better and fail more predictably. When it's time to replace, you'll have clear warning rather than a sudden break.
If your door is older and still has extension springs, a conversion to torsion is worth discussing. This ties into both safety and cost efficiency for your specific situation.
**Need garage door springs in Swanzey today?** Call 1-978-440-3847. we cover same-day service across the area.
Spring replacement costs vary based on type, size, and whether you need one or both replaced. A single torsion spring runs between $200 and $400 installed. Extension springs cost $150 to $250 per pair. These are honest prices with no hidden fees.
If you've had one spring snap, the other is likely close behind, especially if your door is older. Replacing both at once prevents a second emergency call next month. Many homeowners find this more economical than two separate service visits.
I always provide a detailed estimate before starting work. You'll know the exact cost, labor time, and warranty. No surprises. Schedule a free quote today and get clarity on what your door actually needs.
For a deeper look at repair pricing, check out our complete garage door cost guide for Swanzey.
Springs rarely need repair. Once they're damaged, replacement is the only safe option. The moment you hear a loud bang or see your door won't lift, stop using it and call for service.
Early warning signs include squeaking, visible rust, or slightly slower operation. These suggest springs nearing the end of their lifespan. If you're seeing these symptoms, replacement within weeks is smarter than waiting for failure.
Our emergency service team handles same-day repairs when springs snap unexpectedly. But planned replacement is always better than emergency work if you have the lead time.
Springs are essential. They deserve professional attention and quality parts. Whether you need torsion, extension, or advice on which type fits your situation, Swanzey Garage Doors is here to help.
Don't delay. A broken spring leaves you without garage access and puts stress on your opener. Call 1-978-440-3847 or book your spring inspection online. We'll assess your door, explain your options, and give you a fair price.
How long do garage door springs last? Torsion springs typically last 7 to 9 years with regular use. Extension springs wear faster, often failing in 5 to 7 years. Lifespan depends on climate, frequency of opening/closing, and maintenance.
Can I replace just one spring? Technically yes, but both springs carry equal load. If one is worn, the other likely is too. Replacing a single spring often leads to the second failing within weeks, making dual replacement more economical.
What causes a spring to snap? Rust, metal fatigue, temperature extremes, and normal wear weaken springs over time. Swanzey's cold winters accelerate failure. Lack of lubrication speeds deterioration as well.
Is spring replacement an emergency? Yes and no. A snapped spring makes your door inoperable immediately, but it's not dangerous as long as you stop using the door. We offer same-day emergency repair, though planned maintenance is always preferable.
How much does spring replacement cost near Swanzey? Single torsion spring replacement runs $200 to $400 installed. Extension springs cost $150 to $250 per pair. We provide free estimates with no obligation.