Two Types of Springs, Very Different Systems
If your garage door spring broke and someone told you it's a "torsion spring" or an "extension spring," you probably nodded and had no idea what the difference was. That's normal. most homeowners never think about springs until one breaks.
But the type of spring your door uses affects repair cost, replacement options, safety, and longevity. Here's a clear comparison, plus what you'll typically find in Raleigh-area homes.
Torsion Springs
Where they are: Mounted on a metal shaft directly above the garage door opening, running horizontally along the header wall.
How they work: Torsion springs work by twisting. When the door closes, the opener winds the spring tighter, storing energy. When the door opens, the spring unwinds, releasing that stored energy to lift the door. The spring's rotation turns cable drums on either end of the shaft, which reel in the lift cables and pull the door up.
What they look like: You'll see one or two tightly coiled springs sitting on a metal tube above the door. On a two-car door, there are usually two springs side by side. On a one-car door, often just one.
Extension Springs
Where they are: Mounted along the horizontal tracks on either side of the door, running parallel to the ceiling.
How they work: Extension springs work by stretching. When the door is closed, the springs are extended (stretched), storing energy. When the door opens, the springs contract, pulling the door up via a pulley and cable system.
What they look like: You'll see long springs running alongside the horizontal tracks, one on each side. They'll have a safety cable threaded through the center. a steel cable that prevents the spring from flying across the garage if it breaks.
Side-by-Side Comparison
Lifespan: Torsion springs typically last 15,000 to 20,000 cycles with standard springs, and much longer with high-cycle options. Extension springs typically last 10,000 to 15,000 cycles. Torsion springs win on longevity.
Safety: Torsion springs are contained on the shaft. when they break, they stay in place. Extension springs can become projectiles if the safety cable is missing or broken. A snapping extension spring with no safety cable has enough force to go through drywall. Torsion springs are significantly safer.
Noise: Torsion springs operate more smoothly and quietly. Extension springs tend to produce more vibration and noise as they stretch and contract. If your garage is under a bedroom, torsion springs are the better option.
Balance: Torsion springs provide more even lifting force across the door's width because they work through a central shaft and balanced cable drums. Extension springs pull from the sides, which can cause slightly uneven lifting. especially as they wear.
Cost: Extension springs are cheaper to buy and install. roughly 20 to 30 percent less than torsion springs. But their shorter lifespan and higher failure rate mean you'll replace them more often.
Available cycle ratings: Torsion springs are available in a wide range of cycle ratings, from 10,000 to 100,000 cycles. Extension springs top out around 25,000 cycles for residential applications.
What Raleigh Homes Typically Have
Most homes in Raleigh built after the mid-1990s use torsion springs. Builders shifted to torsion systems as the industry standard because of their superior safety, longevity, and smoother operation.
You're more likely to find extension springs in:
- Homes built before 1995
- Smaller single-car garages
- Townhomes and condos with compact garage spaces
- Older neighborhoods in areas like garage door repair in Holly Springs and garage door repair in Fuquay-Varina
If you're in a newer subdivision. which includes much of the Raleigh metro area given the region's growth. torsion springs are almost certain.
Can You Switch from Extension to Torsion?
Yes, and it's a common upgrade. The conversion involves:
- Removing the extension spring hardware (springs, pulleys, safety cables)
- Installing a torsion shaft and mounting brackets above the door
- Installing torsion springs sized for your door's weight
- Replacing or adjusting the lift cables to work with the torsion drums
Conversion cost: $250 to $500 on top of the spring replacement cost, depending on the work required. This makes sense if you're already replacing failed extension springs and want to upgrade rather than replace with the same type.
The conversion is especially worthwhile if your extension springs lacked safety cables (a common finding in older Raleigh homes) because it eliminates the projectile risk entirely.
Repair Costs by Type
Torsion spring repair:
- Single spring: $180 to $350
- Both springs: $250 to $500
- High-cycle upgrade (pair): $300 to $750
Extension spring repair:
- Single spring: $150 to $300
- Both springs: $200 to $400
- With safety cable replacement: Add $20 to $50
Despite the higher per-unit cost, torsion springs are more cost-effective over time because they last longer and need less frequent replacement.
Which Is Better?
Torsion springs are better in almost every category: safety, longevity, noise, and balance. The only area where extension springs come out ahead is upfront cost, and even that advantage diminishes when you factor in lifespan.
If your home currently has extension springs and one breaks, seriously consider converting to torsion. If you already have torsion springs, stick with them and consider a high-cycle upgrade when they need replacement.
Checking Your Springs
Not sure what you have? Here's how to tell without any tools:
- Look above the door opening. If you see springs on a horizontal tube/shaft directly above the door, they're torsion springs.
- Look along the horizontal tracks near the ceiling. If you see springs running parallel to the tracks on either side, they're extension springs.
- If you see springs in both locations, something unusual is going on. call a technician.
If you need spring repair or want to discuss an upgrade in Raleigh or garage door repair in Garner, request a free quote to get started.