What is the difference between torsion and extension springs on a garage door and what does each type cost to replace in Ottawa?

This is one of those things most homeowners never think about until a spring breaks, and then suddenly you are stuck with a door that will not open and need to make a decision quickly. Understanding the difference ahead of time can save you from getting oversold on a repair you do not actually need.

Torsion springs mount on a metal shaft directly above the garage door opening, running horizontally along a header bracket. When the door closes, the springs wind up and store energy. When you open the door, that stored energy does most of the heavy lifting. Most modern garage doors in Ottawa use torsion springs because they provide smoother, more controlled operation and last significantly longer. A standard torsion spring is rated for about 10,000 to 15,000 cycles, where one cycle equals one open and one close. If you use your garage door four times a day, a basic torsion spring lasts roughly seven to ten years. High-cycle springs rated for 25,000 or even 50,000 cycles are available and worth considering if your garage door is your primary entry point to your home, which is extremely common in Ottawa where nobody wants to walk through snow to the front door.

Extension springs mount on either side of the door, running parallel to the horizontal tracks. They stretch and contract as the door moves. These are the older style and are still found on many Ottawa homes built before the mid-2000s. Extension springs are cheaper but they have real drawbacks. They wear out faster, typically lasting 8,000 to 10,000 cycles. More importantly, when an extension spring breaks it can fly off violently, which is a genuine safety hazard. Safety cables should always be threaded through extension springs to contain them if they snap, but many older installations in Ottawa are missing these cables entirely.

For replacement costs in Ottawa, expect to pay $200 to $350 for a single torsion spring replacement including labour, or $300 to $500 if both springs need replacing, which is almost always recommended. Even if only one spring broke, the other one has the same amount of wear and will likely fail within months. Replacing both at once saves you a second service call. Extension spring replacement is cheaper at $150 to $250 for the pair with installation, but if you are replacing extension springs I would strongly recommend upgrading to torsion springs instead. The conversion typically costs $350 to $600 in Ottawa because it requires installing a new torsion bar, header bracket, and center bearing plate above the door. That is more upfront but you get a safer, smoother, longer-lasting system.

High-cycle torsion springs add $50 to $150 to the base cost depending on the cycle rating. For a busy household in Ottawa, this upgrade pays for itself because you are extending the time between replacements by years.

Ottawa's extreme cold does affect spring lifespan. Metal becomes more brittle in severe cold, and most spring failures happen during cold snaps in January and February. The temperature swings we get, going from minus twenty-five to plus two within a few days, cause repeated expansion and contraction that accelerates metal fatigue. There is not much you can do about this other than keeping the springs lubricated with a cold-rated lubricant so they flex as smoothly as possible.

One important safety note. Garage door spring replacement is not a DIY job regardless of which type you have. Torsion springs are under enormous tension and can cause serious injury if wound or unwound incorrectly. Even extension springs carry enough force to be dangerous. This is one of the few home repairs where hiring a professional is genuinely the only responsible option. A qualified technician in Ottawa can typically complete the job in under an hour.

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Looking for experienced contractors? The Ottawa Construction Network connects Ottawa homeowners with qualified professionals:

• Homeupgraders
• JC Carpentry
• GDS - Garage Doors & Openers Ottawa
• Denys Builds Designs Renovations
• Vanguard Environmental