2026-09-26 4 min read
Your garage door won't budge, and you suspect the spring is shot. Here's the straight answer: most doors in Dartmouth use either torsion or extension springs, and when one snaps, the door becomes a 400-pound paperweight. Replacement isn't a DIY job, and the cost varies based on which type you have and local labor rates. Let's cut through the confusion about garage door springs and help you understand what's happening above your head.
Two main spring designs handle the heavy lifting on residential garage doors.
Torsion springs sit horizontally above the door opening, wound tight like a clock spring. When you open the door, they unwind to counterbalance the weight. Most newer homes in the Dartmouth area use torsion springs because they're smoother, quieter, and last longer.
Extension springs run along the sides of the door opening and stretch when the door closes. They're less common now but still found on older installations. They're cheaper upfront but typically wear out faster.
The difference matters because replacement isn't interchangeable. A technician needs to identify which system you have, measure the exact specifications, and order the right part. Installing the wrong spring can damage your opener or cause the door to hang unevenly.
Garage door springs last between 7 and 9 years under normal use. That's roughly 10,000 to 15,000 open-close cycles. Several factors speed up wear.
Cold weather is a real culprit in New England. Winter temperatures in Dartmouth and nearby areas make metal brittle and reduce the lubricant's effectiveness. Springs that might last nine years in a mild climate can snap at seven years here.
Rust accelerates failure too. If moisture gets inside the spring coils (common in humid garages), corrosion weakens the metal from the inside. Lack of lubrication compounds the problem. Springs need an annual light coating of garage door lubricant to move freely without friction.
Overuse also takes a toll. A door that opens and closes 20 times a day wears springs twice as fast as one used three times daily. If you're running a business from a Dartmouth garage or have multiple household members coming and going constantly, expect shorter spring life.
When a torsion spring breaks, you'll hear a loud bang or crack. The door will feel heavy or won't open at all. The opener may hum but won't lift the door. If an extension spring snaps, one side of the door may hang lower than the other, or the door won't move smoothly.
Never force a stuck door open. A snapped spring means the system has lost its mechanical advantage. Pushing the opener will only strain the motor and potentially cause more damage. This is exactly the kind of situation covered in our emergency garage door service guide for Dartmouth homes.
**Need garage door springs in Dartmouth today?** Call +1 508 690 4704. We cover same-day service across the area.
Spring replacement cost depends on the type, quality, and whether you need one or both springs replaced. A single torsion spring typically runs $150 to $300 in parts, plus labor. If both springs are original and old, many technicians recommend replacing both at the same time, since the second one will likely fail within months.
Extension springs are slightly cheaper but require new cables too if they're worn. Labor varies by shop and region. Dartmouth and surrounding towns see similar rates, but always ask for an estimate before work begins. Our garage door repair estimate guide breaks down what factors drive the final bill.
Same-day service usually carries a modest surcharge, especially if you need emergency repairs outside business hours. That's a trade-off worth making if your garage is your entry point and the door won't move.
Springs can't be truly repaired. Once they snap or lose tension, replacement is the only real fix. However, if you catch wear early, preventive lubrication and inspection can extend life by a year or two.
If both springs are showing age (door feels heavier to open, more noise than usual), replacing them together makes financial sense. You avoid a second breakdown weeks later and the inconvenience that comes with it.
Garage Door Dartmouth handles spring replacement, installation, and preventive maintenance. We assess your system, order the correct parts, and install them safely. We can also recommend a maintenance schedule to catch issues before they become emergencies.
Ready to move forward? Schedule a free quote or call +1 508 690 4704 to describe your situation.
How do I know if my spring is bad? The door feels very heavy, won't open, or opens unevenly. You may hear a loud snap or crack. If the opener hums but doesn't lift the door, a spring has likely failed.
Can I replace just one spring? Technically yes, but if both springs are original and old, the second will fail soon. Replacing both at once saves money and hassle long term.
How long does replacement take? Most spring replacements take 1 to 2 hours. We can often complete work the same day you call, depending on parts availability and schedule.
Is spring replacement dangerous? Springs are under extreme tension and can cause serious injury if mishandled. Always hire a licensed technician. DIY attempts are not recommended.
What's the difference between a $200 and $400 spring replacement? Part quality, spring lifespan, and labor rates vary. Premium springs last longer. Some shops charge more for emergency same-day service. Always compare estimates.
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