Torsion vs. Extension Springs: What Every Homeowner Should Know
Your garage door spring is the hardest-working part of the whole system — and the most dangerous to replace yourself. Here is how to tell which type you have and what to do when it breaks.
If your garage door suddenly refuses to open — or opens a few inches and stops — there is a good chance a spring has broken. It is one of the most common garage door failures we see at Speedy Check Garage Doors, and it is also one of the most misunderstood.
Here is what every homeowner should know about garage door springs before one fails.
What Springs Actually Do
Your garage door weighs anywhere from 130 to 400 pounds depending on its size and material. The springs are what make it feel light. They store mechanical energy when the door closes and release it when the door opens, counterbalancing the door's weight so your opener only has to manage the movement — not lift the full load.
When a spring breaks, that counterbalance disappears. The opener suddenly has to move the full weight of the door, which it cannot do safely. Most openers will either stall, strain, or trip their safety mechanism. The door effectively becomes inoperable.
The Two Types of Springs
Torsion Springs
Torsion springs are mounted horizontally above the door opening on a metal shaft. When the door closes, the springs wind up and store energy. When the door opens, they unwind and release that energy to assist the lift.
Most modern residential garage doors use torsion springs. They are more durable than extension springs, provide smoother and more balanced operation, and are considered safer because they are contained on the shaft when they break — rather than flying loose.
A standard torsion spring is rated for approximately 10,000 cycles. One cycle is one open and one close. For a family that uses the garage door four times a day, that works out to roughly seven years of life. High-cycle springs rated for 25,000 or 50,000 cycles are available and worth the upgrade if you use your door frequently.
How to identify a torsion spring: Look above the door when it is closed. If you see a horizontal coiled spring (or two springs) mounted on a metal bar running across the top of the opening, those are torsion springs.
Extension Springs
Extension springs run along the horizontal tracks on each side of the door. They stretch (extend) when the door closes and contract when it opens. They are typically found on older doors and lighter residential doors.
Extension springs are less expensive than torsion springs but have some drawbacks. They wear unevenly, they require safety cables threaded through them (to contain the spring if it breaks), and they provide less balanced lift than a torsion system.
How to identify extension springs: Look along the horizontal tracks on the sides of your door. If you see long coiled springs running parallel to the ceiling, those are extension springs.
Signs a Spring Is Failing
Springs rarely give much warning before they break, but there are some signs to watch for:
- The door feels heavier than usual when you lift it manually (disconnect the opener and try)
- The door doesn't stay put when you stop it halfway — it either falls or rises on its own
- Visible gaps in the spring coils — a broken torsion spring will have a visible separation
- The door opens a few inches and stops — the opener is sensing the overload and stopping
- A loud bang from the garage — a torsion spring breaking sounds like a gunshot; many homeowners think something fell
Why You Should Never Replace Springs Yourself
This is the part we have to be direct about: garage door spring replacement is not a DIY job.
Torsion springs are under extreme tension — hundreds of foot-pounds of torque. When they are wound or unwound incorrectly, they can release that energy violently. Injuries from spring failures include broken bones, lacerations, and in rare cases, fatalities. The tools required to safely wind a torsion spring are specialized, and the technique requires training.
Extension springs are somewhat less dangerous but still carry real risk, particularly if safety cables are not properly installed.
Professional spring replacement typically takes 45 to 90 minutes. The cost is reasonable relative to the risk of doing it wrong. This is one of those jobs where the right call is clear.
What to Expect From a Spring Replacement
When you call Speedy Check Garage Doors for a spring replacement, here is what happens:
- We identify the correct spring specifications for your door — weight, height, and wire size all factor into the right spring
- We remove the broken spring and inspect the shaft, drums, and cables for wear
- We install the new spring and wind it to the correct tension
- We test the door balance and adjust as needed
- We lubricate all moving parts and do a full safety check
We recommend replacing both springs at the same time if you have a two-spring system. If one has broken, the other is likely near the end of its life as well — and replacing both now saves you a second service call in a few months.
Spring Upgrades Worth Considering
If your door currently has standard 10,000-cycle springs, this is a good time to upgrade to high-cycle springs. The cost difference is modest, and you will get significantly more life out of the replacement.
We also offer galvanized springs for customers who want extra corrosion resistance — particularly useful in garages that see more humidity or are near pools.
Call Us Any Time
Speedy Check Garage Doors is available 24 hours a day, 7 days a week for spring replacements throughout Peoria, Phoenix, Glendale, Surprise, Scottsdale, and all of Maricopa County. A broken spring does not have to mean a day without a working garage door.
Call us at (480) 480-7303 and we will have a technician out to you as quickly as possible.
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