Torsion vs Extension Garage Door Springs: What Is the Difference?
Torsion springs sit above the door and extension springs run along the sides. Here is how they differ, how they fail, and why the right spring matters.
Every garage door that opens and closes smoothly is doing so because its springs are carrying most of its weight. There are two main types of spring used in residential garage doors: torsion springs and extension springs. They do the same job in different ways, they look different, they fail differently, and they are not interchangeable. Knowing which type your door has helps you describe the problem clearly when you call a contractor, and it helps you understand what the repair involves.
What is a torsion spring?
A torsion spring is a tightly wound steel coil mounted on a horizontal shaft directly above the garage door opening. When the door closes, the spring winds up and stores energy. When the door opens, the spring unwinds and releases that energy, helping to lift the door. Most modern residential doors use one or two torsion springs, and you can usually see the coil, the shaft, and the cable drums at each end from inside the garage. Torsion springs are generally quieter and smoother than extension springs, and they give the contractor finer control over the door's balance, because the spring can be wound to match the door's weight precisely. They are the most common type on newer doors in Murfreesboro, including the double-width doors found in many subdivisions.
What is an extension spring?
How long do they last?
Both types are typically rated for about 10,000 open-and-close cycles, which works out to roughly seven to ten years of normal household use. A door that is used four times a day will reach that limit sooner than a door used once a day, and cold weather can be the final trigger, because steel becomes more brittle in the cold. That is why springs often break on a winter morning. Much of Murfreesboro's housing was built in 2000 or later, so many homes still have their original springs, and many of those springs are now at or past their rated life. If your door is original to a home built in the early 2000s, its springs are worth having inspected even if they have not broken yet. Our garage door spring repair page explains the symptoms of a broken spring in more detail.
Which type is better?
Neither type is better for every home. Torsion springs usually give smoother, quieter operation and last well when matched correctly, but they need enough headroom above the door for the shaft and drums. Extension springs need less headroom and are simpler to fit, but they can be harder to balance precisely and they take up space along the sides of the door. The choice is usually made when the door is installed, based on the space available and the weight of the door. When a spring is replaced, a contractor fits the same type the door was designed for, matched to the door's weight and size. A spring that is too weak leaves the door heavy and strains the opener, while a spring that is too strong makes the door hard to close. If the door itself is worn out as well, it may be time to consider garage door replacement instead of another repair, and a contractor can compare the two options for you.
What to do if a spring breaks
Do not try to repair or replace a spring yourself, whichever type it is. Both torsion and extension springs store a large amount of energy, and releasing that energy without the right tools and training can cause serious injury. Leave the door down, unplug the opener if it keeps trying to run, and call (615) 845-8263 for service assistance. Tell the contractor whether your spring is above the door or along the sides, and whether the door is open or closed. Homeowners in Murfreesboro, TN can call and describe the problem in their own words, and we will help connect them with an independent local contractor.
Key takeaways
- Torsion springs sit above the door; extension springs run along the sides.
- Both are typically rated for about 10,000 cycles, or roughly seven to ten years.
- The replacement spring must match your door's weight and type.
- Spring work is not a do-it-yourself job, whichever type you have.
Related services
- Garage Door Spring Repair — Help with broken torsion and extension springs — the most common reason a door suddenly becomes too heavy to lift.
- Garage Door Replacement — Replace a damaged, worn-out, or outdated garage door with a new door that fits your home.
Related guides
- Garage Door Opener Hums but the Door Will Not Move: Causes and Fixes
- Garage Door Will Not Open: Common Causes and What to Check First
See all guides on our blog, or browse our garage door services.
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