If you have a garage door, it has either torsion springs or extension springs — and understanding the difference matters when the time comes for replacement. Here is a clear explanation of both types, which performs better in Calgary’s climate, and what it costs to upgrade from one to the other.
Extension Springs
Extension springs are mounted horizontally along the upper sides of the door tracks, one on each side. They stretch — extend — when the door is closed and release their stored energy to help lift the door when opening. Extension springs are common in older Calgary homes and in garages with lower ceiling heights where there is not enough room for a torsion bar above the door opening.
Extension springs are less expensive as individual components but require more components for a complete system — including safety cables that run through the spring to contain it if it breaks. When an extension spring snaps without safety cables, it can fly across the garage with considerable force. Older extension spring systems should always be inspected for the presence of safety cables.
Torsion Springs
Torsion springs mount horizontally on a metal bar directly above the garage door opening. They store energy by winding — twisting — rather than stretching. When the door opens, the spring unwinds and transfers rotational energy through the torsion bar to the cable drums, which lift the door.
Torsion springs provide better door balance, smoother operation and longer service life than extension springs. They also contain any failure better — a broken torsion spring stays on the bar and does not fly freely. For Calgary homes, torsion springs are the preferred choice because of their better cold-weather performance and longer lifespan.
Frequently Asked Questions
What is the difference between torsion and extension garage door springs?
Extension springs stretch along the sides of the tracks. Torsion springs mount above the door and wind/unwind. Torsion springs provide better balance, smoother operation and longer lifespan.
Which type of spring is better for Calgary homes?
Torsion springs are better for Calgary — they handle freeze-thaw temperature cycling better, last longer, contain failure more safely, and provide better door balance in our climate.
Can I upgrade from extension springs to torsion springs in Calgary?
Yes. Super G&R Garage Door Repairs can upgrade most doors from extension to torsion spring systems. The cost is typically $500–$700 + GST and is a worthwhile upgrade for older doors or for homeowners who want better reliability.
How much do torsion springs cost to replace in Calgary?
Torsion spring replacement costs $380–$480 + GST for a pair (both springs), including high-cycle oil-tempered springs, labour and 1-year warranty.
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