2026-08-29 7 min read
Your garage door weighs 300 to 500 pounds. Without springs, it would crash down on your car, your fingers, or worse. Torsion springs and extension springs are the two systems that keep this from happening. Each works differently, fails differently, and costs differently to replace. Knowing which one you have, and how it functions, is the first step to avoiding emergency repairs and unnecessary expenses in Roxboro.
Torsion springs are mounted horizontally above your garage door opening, centered on a metal shaft. When you open the door, the spring twists (torques) and stores mechanical energy. When you close it, that stored energy unwinds and helps lower the door smoothly. The spring winds tighter as the door closes, releasing energy gradually.
Think of it like winding a clock. The tighter you wind it, the more energy it stores. Torsion springs are precisely calibrated. The number of coils, wire thickness, and shaft diameter all determine how much weight the spring can lift. Most residential doors in Roxboro use one or two torsion springs. If your door has two springs, they should break at roughly the same time. When one snapped spring fails, the other is usually not far behind.
The lifespan of a torsion spring is typically 7 to 9 years with regular use. The more cycles (opens and closes) your door completes, the faster the spring wears. A door that opens and closes 10 times daily will need spring replacement sooner than one used 3 times daily.
Extension springs hang vertically on either side of your garage door opening, usually above the horizontal track. They stretch when the door opens and contract when it closes. Pulleys and cables guide this motion and transfer force to the door.
Extension springs are less common in modern homes but still appear in older installations. They're typically found on lighter doors or narrower openings. Unlike torsion springs, extension springs wear unevenly. One spring often fails while the other has life remaining. This creates an imbalanced door that may jam or operate roughly.
Safety cables run through the center of extension springs. If a spring snaps, the cable catches the broken coils and prevents them from flying across your garage at high speed. Without these cables, a snapped spring becomes a projectile that can cause serious injury or property damage.
**Need garage door springs in Roxboro today?** Call (919) 769-6562. we cover same-day service across the area.
Springs fail due to metal fatigue. Each open and close cycle creates tiny stress fractures inside the coils. Over years, these fractures expand until the spring snaps suddenly. There's no gradual warning. One moment your door operates normally. The next moment, you hear a loud bang and your door either won't open or falls hard.
Cold weather accelerates failure. Winter temperatures in Roxboro make metal brittle. If your spring was already near the end of its life, a cold snap can trigger a break. This is why we see more emergency calls between November and February.
If you notice your door opening slowly, sagging on one side, or requiring extra force from your opener, read our guide on signs your garage door springs need replacement in Roxboro. These are early warnings that replacement is coming soon.
Torsion spring replacement typically costs more than extension spring replacement because torsion springs handle greater load and require precise calibration. The price also depends on spring quality, door weight, and local labor rates. Our detailed breakdown of garage door spring repair cost in Roxboro covers what affects your final bill.
Never attempt to replace springs yourself. The tension stored in these springs is powerful enough to break bones or cause permanent injury. A technician has the proper tools, training, and safety equipment to handle the job correctly. Attempting a DIY repair often leads to improper installation, which can damage your opener or create safety hazards.
First, identify which type of spring your door has. Look above the door. If you see a horizontal spring wound around a shaft, that's torsion. If you see two springs hanging vertically on the sides, that's extension.
Next, schedule a free quote with Garage Door Roxboro. We'll inspect your springs, measure their remaining life, and give you an upfront estimate. Same-day service is available for emergency situations, and we serve the entire Roxboro area plus surrounding communities.
If a spring has already snapped, don't operate your garage door. Call us immediately. Forcing a broken spring to work will damage your opener and make the repair more expensive.
How long do garage door springs last? Torsion springs typically last 7 to 9 years with average use (3 to 5 cycles per day). Extension springs last 5 to 7 years. Lifespan depends on usage frequency, climate, and maintenance. Doors opened 10+ times daily wear springs faster.
Can I replace just one spring if I have two? For torsion springs, it's recommended to replace both at once, even if only one has snapped. The second spring is under similar stress and will likely fail within months. For extension springs, you can replace one, but many technicians suggest replacing both for balanced door operation.
What's the difference between a snapped spring and a worn spring? A snapped spring breaks suddenly and completely. A worn spring still functions but may show signs of weakness like slower opening or door sag. A worn spring needs replacement soon; a snapped spring needs immediate attention to prevent garage door opener damage.
Why is DIY spring replacement dangerous? Springs store hundreds of pounds of mechanical energy. Releasing this energy incorrectly can cause the spring to unwind violently, breaking bones or causing lacerations. Improper installation also damages your opener and door balance.
Should I get an estimate before calling a technician? Yes. We provide free estimates with no obligation. Call (919) 769-6562 or visit our services page to learn what we offer and schedule your inspection.