2026-09-07 7 min read
Your garage door feels heavy. You hit the opener button and nothing happens. Or worse, the door falls hard. Before you panic, you need to know what's actually holding that 300 to 500 pound door up in the first place. Garage door springs in Charlestown come in two main types: torsion and extension. Each works differently, fails differently, and costs differently to replace. Let's cut through the confusion and explain what you're dealing with.
A torsion spring sits horizontally above your garage door opening. It twists and untwists as your door moves up and down. This rotation stores and releases the energy needed to lift your door smoothly. When you open the door, the spring tightens. When you close it, the spring unwinds and helps lower the door gently.
Torsion springs are the professional standard. They last longer than extension springs, typically 7 to 9 years with normal use. They're more balanced, quieter, and safer. If one snaps, the door won't fall on your car or your head because the spring is still under tension above. That said, they cost more to repair or replace than extension springs. They also require special tools and knowledge to adjust or install safely.
Extension springs run vertically along both sides of your door frame. They stretch and contract as the door opens and closes. Two springs, one on each side, share the load. They're cheaper upfront and simpler in design, which is why older homes in Charlestown sometimes still have them.
The trade off: extension springs wear out faster, usually lasting 5 to 7 years. When one snaps, the other side can't support the door weight, and the door can drop or hang unevenly. Safety cables run through these springs specifically to catch a snapped spring and prevent injury. Without those cables, a snapped extension spring becomes a serious hazard.
**Need garage door springs in Charlestown today?** Call (617) 762-5531. We cover same-day service and honest estimates across the area.
A snapped spring is unmistakable. You'll hear a loud bang. The door won't open more than a few inches, or it won't open at all. The opener will strain and strain but nothing happens. If you see the door opening or closing unevenly, one side higher than the other, that's a red flag too.
Springs lose power gradually over time. Your door might feel heavier than it used to. You might notice the opener working harder. These are early warnings. Unlike an extension spring that snaps suddenly, a torsion spring can give you signs before complete failure.
If you're seeing these symptoms, check our post on broken garage door springs in Charlestown and what to do next. It covers the repair process in detail.
Torsion spring replacement costs more than extension spring replacement, sometimes by 40 to 60 percent. But a torsion spring lasts significantly longer, so the long term cost per year is often similar. The real difference: torsion springs require professional installation. Adjusting the tension on a torsion spring is dangerous without proper equipment.
Extension springs can sometimes be replaced by handy homeowners, but we recommend professional service. The tension is hard to judge correctly, and if you get it wrong, the door becomes unsafe.
When you need a replacement, get a free estimate from us. We'll tell you exactly what type you have, whether it's worth replacing now or later, and what the real cost will be. No surprises, no upsell.
Springs fail faster when they're not lubricated. Rust and friction accelerate wear. A light coat of garage door lubricant on your springs twice a year can add 1 to 2 years to their lifespan. It's simple maintenance that pays off.
Check our garage door maintenance guide for Charlestown homeowners to learn what else extends the life of your entire system, including springs.
DIY spring repair is not recommended. These springs are under tremendous tension and can cause serious injury if mishandled. A professional technician has the right tools, the training, and the insurance to do the job safely.
If your door is stuck or moving unevenly, or if you suspect a snapped spring, don't force it. Call Charlestown Garage Doors at (617) 762-5531 or schedule a free quote online. We'll assess which type of spring you have, diagnose the problem, and give you a straight answer about repair versus replacement.
Springs are the heart of your garage door system. Understanding what type you have and how they work gives you power when something goes wrong. You won't get sold on something you don't need, and you'll know what's normal versus what's a real problem.
How long do garage door springs last? Torsion springs typically last 7 to 9 years. Extension springs last 5 to 7 years. Lifespan depends on usage frequency, climate, and how well you maintain them. Coastal areas like Charlestown may see slightly faster wear due to salt air corrosion.
Can I replace a garage door spring myself? Not safely. Springs are under extreme tension. Improper installation or adjustment can cause the door to fall unexpectedly or the spring to snap and cause injury. Professional installation protects you and your property.
Why is my torsion spring more expensive than an extension spring? Torsion springs are more complex, last longer, and require specialized tools and training to install. The higher upfront cost usually balances out over the spring's longer lifespan.
What happens if a spring snaps while the door is open? If a torsion spring snaps, the door usually stays up because the other spring still has tension. If an extension spring snaps, the safety cables prevent the door from falling, but the door won't open or close smoothly until repaired.
How do I know if my springs need lubrication? Listen for squeaking or grinding sounds as the door opens and closes. If the door moves roughly or jerks, lubrication may help. Apply a light spray to the springs twice yearly for best results.