Garage Door Cable Replacement Cost and What Affects It

Garage door cable replacement in Calgary is $199 plus GST for a pair of cables. That covers both cables, re-tensioning the drums, rebalancing the door and a safety check. Cables are always replaced in pairs, never singly, for reasons explained below.

If the cable failed because a spring broke first, which is common, spring replacement is $349 and the two are usually done in the same visit.

What the cables actually do

Look at the bottom corners of your garage door. There is a bracket on each side with a steel cable running from it, up alongside the track, to a grooved drum at the top of the torsion bar.

Those cables transfer the lifting force from the springs to the door. The springs store the energy. The cables deliver it to the bottom of the door and pull it up. They also hold the door level, which is why a failed cable makes a door go crooked rather than simply stop.

They are under continuous tension and they wrap and unwrap around the drum thousands of times a year. Like any steel cable, they fatigue.

How to tell a cable has failed

The door is crooked in the track. One side is higher than the other, or the door is visibly racked. This is the classic sign.

There is loose cable on the floor or hanging slack. The cable came off the drum or snapped. You can usually see it.

The door is stuck partway. Racked doors bind in the track and stop.

You can see fraying. Run your eye along the visible length of both cables. Cables fray from the inside out, so by the time you see broken strands on the surface the cable is well past its service life. This is the sign to book a replacement before it snaps, not after.

There is rust on the cable near the bottom bracket. The bottom few inches sit closest to road salt, snow melt and standing water on the garage floor. That is where they usually go first in Calgary.

One side of the door hits the floor before the other. Uneven drum tension, often because one cable stretched or slipped.

Why both cables, always

If one cable failed, the other is the same age, the same specification, and has done the same number of cycles under the same conditions. It has not failed yet. That is the only difference.

Replacing one and leaving the other means you are back within months, paying a second call-out for a part that could have been done while the technician was already standing there with the drums unwound.

There is also a balance problem. A new cable and an old stretched cable are not the same effective length. The door sits unevenly, racks slightly in the track on every cycle, and wears rollers, hinges and the track itself faster than it should.

The $199 covers both. Doing one is not cheaper in any meaningful sense.

What causes cables to fail

Age and cycle count. The most common reason. Cables have a working life like everything else on the door.

Rust. Calgary specific and significant. Snow packed under a vehicle melts onto the garage floor, road salt comes with it, and the bottom of the cable sits in that. Salt corrodes steel, corroded steel loses strength, and the cable parts under load. Galvanised cables resist it better than plain steel and are what we fit.

A broken spring. When a spring goes and the opener keeps pulling, the load transfers somewhere it was never meant to go. Cables often take the hit. This is the main reason we say stop using the door the moment a spring breaks.

Drum misalignment. If the cable is not seated properly in the drum groove, it rubs against itself or the drum edge and wears through. This happens after a poor install or after the door has been off track.

The door coming off track. Racking pulls the cable at the wrong angle, kinks it, and creates a weak point.

Slack from the door hitting an obstruction. If the door lands on something, the cables go slack and can jump off the drum. Sometimes they reseat, sometimes they bind and get damaged.

Please stop using the door

If a cable has gone, the door is unbalanced and the remaining cable is carrying load it was not designed for alone. Continuing to run the opener risks:

• The second cable snapping under the doubled load
• The door coming fully off track, which bends track sections and adds cost
• Panel damage where the door racks against the frame
• Opener damage from pulling against a jammed door

If you need a vehicle out, pull the red emergency release cord and lift by hand with a second person, because the door will be heavy and uneven. Then leave it in a safe position and call.

Should you do this one yourself?

Cables sit in a grey area. They are a lot less dangerous than springs, but they are directly connected to them.

To replace a cable you have to release tension from the torsion system to unwind the drum. That means handling the same stored energy that makes spring work hazardous. If you have never wound a torsion spring, this is not the job to learn on.

The other issue is tensioning. Cables have to be set to matched lengths so the door sits level. Get it slightly wrong and the door racks on every cycle, which is exactly the wear pattern you were trying to fix.

If you are a confident DIYer with the right tools and you have done torsion work before, it is achievable. For most people, $199 is worth not finding out.

What our $199 includes

• Both replacement cables, galvanised
• Labour
• Drum inspection and correct re-seating
• Re-tensioning and rebalancing the door
• Bottom bracket inspection, since that is where cables terminate and where corrosion starts
• Lubrication of rollers, hinges and bearings
• Safety reverse test on the opener
• Written invoice with warranty terms

Not included: GST. If a spring has also failed, that is $349. If a bottom bracket is corroded through or a drum is damaged, we will price that before touching it.

How to make the next set last longer

Keep the garage floor dry where you can. Squeegee out standing meltwater in winter, particularly near the bottom brackets. Salt sitting against the cable termination is the fastest way to shorten its life in this city.

Get the door checked once a year. A technician can spot fraying while it is still an inspection note rather than an emergency. A $149 tune-up covers this.

Do not ignore a door that sits unevenly. Slight racking is often an early cable or drum issue, and it is much cheaper to correct at that stage.

Replace cables when you replace springs. If both are near end of life, doing them together saves a call-out. We will tell you if we think the cables have a year left rather than five.

Frequently asked questions

How long does cable replacement take?
Usually 45 to 60 minutes on a standard residential door.

How long should cables last in Calgary?
Roughly the same as springs, so five to eight years at typical use. Corrosion from road salt shortens it, so a garage that sees a lot of winter parking will be at the shorter end.

Can a cable be repaired instead of replaced?
No. A frayed or snapped steel cable cannot be spliced safely. It gets replaced.

Is $199 before or after tax?
Before. Add GST at 5%.

My cable came off the drum but does not look damaged. Can you just reseat it?
Sometimes, and if that is genuinely all it needs, that is a general repair at $199 rather than a parts job. We will tell you which it is. But a cable that jumped the drum has usually been kinked or scored in the process, and we would rather replace it than have you call back.

Do you charge more for evenings or weekends?
No.

Book a cable replacement

Cable replacement is $199 plus GST for the pair, with rebalancing included. Same price weekends and evenings.

Call 587 223 5757 or request a quote.

Serving Calgary, Airdrie, Chestermere, Cochrane, Okotoks, Strathmore and High River.