Torsion vs Extension Garage Door Springs: Which One Do You Have?
The short version
When a homeowner calls us and says “my spring is broken,” the first thing we ask is: “is it the one above the door, or the ones on the sides?” Because those are two completely different parts — with different costs, different lifespans, and very different safety profiles.
This guide is the 60-second version of how to tell which spring you have, why it matters, and what to do next. No jargon, no sales pitch — just the stuff we'd tell a neighbor.
How to tell which garage door spring you have (5-second check)
Stand inside your garage, facing the closed door. Look up. What you see tells you everything:
- One or two metal springs running horizontally across a bar above the door → you have torsion springs. This is the modern standard.
- Long stretched springs running along the top of each horizontal track (one on each side, parallel to the ceiling) → you have extension springs. Common in homes built before 2000.
- Nothing visible → your door may use a torsion system hidden inside a housing, or you may be looking at a newer wall-mount opener setup. Send us a photo and we'll confirm.
Torsion springs — the modern standard
Torsion springs are heavy coiled springs mounted on a horizontal steel shaft directly above the closed garage door. When the door closes, cables wrap around drums at each end of the shaft and wind the spring tight. When the door opens, the spring unwinds and transfers stored energy back to the door, making it feel light.
Where torsion springs live
- Above the door, mounted on the header wall
- One spring for light single-car doors, two springs (paired) for most two-car doors
- Always accompanied by two cables and two drums
Torsion spring lifespan in Seattle
Standard 10,000-cycle torsion springs last 7–9 years in a typical Seattle household. We now install 20,000-cycle high-cycle springs as default — they roughly double that lifespan for about $40 more in parts. For heavy-use homes (4+ cycles per day) we recommend going straight to 25,000-cycle springs.
Torsion spring cost
| Service | Typical Cost | Notes |
|---|---|---|
| Single torsion spring replacement | $250–$350 | One-car door or lighter setups |
| Paired torsion springs | $350–$450 | Both springs on a two-car door |
| High-cycle upgrade (20K) | +$40 | Roughly doubles lifespan |
Full cost breakdown is on our broken spring signs & repair cost guide.
Extension springs — older homes
Extension springs are long, stretched springs that run horizontally along the top of each track on the sides of the door. They work by stretching as the door closes, then contracting to help lift the door back up. You'll usually see a safety cable running through the middle of each spring.
Where extension springs live
- Along the top of each horizontal track, one spring per side
- Parallel to the ceiling, mounted between two brackets
- Common in Seattle-area homes built before 2000, especially in Capitol Hill, West Seattle, older Bellevue neighborhoods, and 1960s–70s ramblers across Pierce County (Tacoma, Puyallup, Federal Way)
The safety problem with extension springs
Extension spring cost
| Service | Typical Cost | Notes |
|---|---|---|
| Extension spring replacement (pair) | $200–$350 | Most older Seattle homes |
| Add safety cables if missing | +$50–$100 | Strongly recommended |
| Convert to torsion system | $450–$650 | One-time upgrade, longer lifespan, safer |
Not sure which spring type you have?
Take one photo of the space above or beside your garage door and text it to us. We'll identify it in under 5 minutes. Reply 'I need to identify my spring type' and we'll know what to look for.
Torsion vs extension springs: quick comparison
If you just want the facts side by side, here's everything worth knowing in one table. Prices are Seattle-area averages for 2026.
| Attribute | Torsion | Extension |
|---|---|---|
| Location | Horizontal bar above the door | Along the sides, parallel to ceiling |
| Typical lifespan | 7–9 years (10K cycles) | 7–10 years (less predictable) |
| Failure mode | Stays on the shaft | Can fly across garage without safety cable |
| Noise during operation | Quiet, smooth | Noticeably louder |
| Door balance | Even, predictable | Jerky, wears openers faster |
| Replacement cost | $250–$450 (paired) | $200–$350 (paired) |
| Upgrade / conversion | High-cycle spring +$40 | Convert to torsion $450–$650 |
| Best for | Any modern install | Only where torsion won't fit |
Torsion vs extension springs: key differences explained
1. Safety
Torsion springs are significantly safer. When they fail, they usually stay on the shaft. Extension springs without safety cables are one of the most dangerous failure modes in residential garage doors — and we still find them in about a third of pre-1995 Seattle homes we visit.
2. Lifespan
Torsion springs last longer under normal use and wear more predictably. Extension springs stretch and fatigue in less predictable patterns, which is why they often break without warning.
3. Balance and opener wear
Torsion springs provide smoother, more balanced lift. Extension spring doors tend to jerk slightly on each cycle, which wears out openers and cables faster. If you've been replacing opener parts every few years on an older door, the extension spring system is probably the real problem.
4. Noise
Extension spring doors are noticeably louder. If a quiet garage matters to you (kids asleep, attached bedroom above the garage), converting to torsion is one of the biggest quality-of-life upgrades you can make.
When to convert from extension to torsion
We recommend converting in these cases:
- Your extension springs don't have safety cables
- The door is attached to a bedroom or living space above
- You're planning to replace the opener anyway — a torsion system makes any opener last longer
- You're already paying for spring replacement and the price gap is only a couple hundred dollars
Conversion takes about 2 hours and costs $450–$650 across the Seattle area — same price in Bellevue, Kirkland, Redmond, Everett and Tacoma. Most homeowners who convert tell us the noise reduction alone was worth it. See our spring repair service page for full scope and warranty, or the Seattle spring repair page for neighborhood notes.
What to do next
Take one photo of what you see above or beside your garage door and text it to (425) 203-7777. We'll tell you which spring type you have, whether it's a good candidate for repair vs. conversion, and exactly what it costs. No phone tag, no obligation.
If you already know a spring is broken, start here: Broken garage door spring — 7 signs & repair cost in Seattle.
Text us a photo — we'll quote you in minutes
No phone tag. No upsells. Real pricing from licensed technicians in Bellevue & Everett.
Frequently asked questions
Which is better, torsion or extension springs?
Torsion springs are better in almost every way: safer, longer-lasting, quieter, smoother, and easier on the opener. Extension springs are only still used today because they're slightly cheaper to install and because many older homes came with them from the start.
Can I convert extension springs to torsion?
Yes. Most Seattle-area homes are good candidates for conversion, which takes about 2 hours and costs $450–$650. The result is a quieter, safer, longer-lasting system that extends the life of your opener and cables.
How can I tell if my spring is broken before calling?
For torsion springs, look for a 2–3 inch gap in the coil above the door. For extension springs, look for a stretched-out or snapped spring hanging from the track. In both cases, the door will be very heavy and the opener will struggle or stop. See our 7-signs guide for details.
Are extension springs without safety cables legal?
Yes — they're legal, but strongly discouraged by every major garage door association and every Washington State contractor we know. Installing safety cables is an inexpensive add-on ($50–$100) and it's one of the most important safety upgrades for older homes.
How long do torsion springs last in Seattle?
Standard 10,000-cycle torsion springs last 7–9 years in typical use. Our 20,000-cycle high-cycle upgrade roughly doubles that. Heavy-use homes (4+ daily cycles) should go with 25,000-cycle springs for 10+ years of service.
Why do two-car doors need two torsion springs?
Two-car doors are heavy — 150 to 300 pounds depending on material. Two springs share the load evenly and balance the door. A single failure still lets the opener operate briefly (at reduced capacity), which buys you time to call a technician before the door becomes unsafe.
About the author
Northwest Garage Doors Team — licensed garage door technicians at Northwest Garage Doors, with offices in Bellevue and Everett, Washington. Washington State licensed contractor #NORTHGD753JW. Our crew services garage doors across King, Snohomish and Pierce counties seven days a week. More about the team →