Skokie, IL · Same-day service
Extension Springs on Skokie's Older Garage Doors
Walk into the garage and look sideways rather than up. A long spring stretched horizontally above each track, running back toward the rear wall, means you have extension springs. A single shaft with springs coiled on it directly above the door means torsion, and that is a different repair with different parts.
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Extension springs are still in service across Skokie, mostly on the smaller detached garages in the older blocks toward the Lincolnwood and Chicago lines, where the original door was a light single-car unit. We replace them as matched pairs and we deal with the containment cables while the door is open.
The Containment Cable Question
An extension spring stores its energy along its own length. When one breaks it does not stay put the way a torsion spring on a shaft does. It whips. A containment cable is a plain steel cable threaded down the middle of the spring and anchored at both ends, so a failure stays on the cable instead of crossing the garage.
A good number of the extension setups we open up here have never had one fitted. It is an inexpensive part and it takes minutes. If your door is missing them, we will point that out and add them during the same visit rather than booking you a second call for it.
Pulleys, Cables and What Actually Fails First
The spring is rarely the only tired component. An extension system runs the lift cable over a pulley at each end, and those pulleys have small bearings that dry out and seize in an unheated garage. A seized pulley saws at the cable instead of turning under it, and the cable gives up one strand at a time.
So we look at the pulleys, the S-hooks, the track hangers and the cable where it terminates at the bottom bracket. Fitting a new spring while leaving a half-worn cable on a seized pulley only moves the next failure a few months down the road.
Replace in Kind, or Convert to Torsion
Both are legitimate answers. Staying with extension springs is quicker and suits a light single-car door that is otherwise sound. Converting to a torsion shaft gives better balance, less side-to-side wobble in the tracks and a longer service life, and it removes the whipping hazard entirely.
What decides it is headroom and back room in the garage, which is why the tape measure comes out before any recommendation. A narrow 1950s alley garage sometimes has the space and sometimes does not. You get the straight answer, not an automatic upgrade.
Other work we do in Skokie
- Torsion Springs
- Roller Repair
- Panel Replacement
- Smart Openers
- Commercial
- Custom Doors
- Maintenance
- Safety Inspection
- Lubrication
- Spring Replacement
- Opener Repair
- Installation
- Emergency Service
- Cable Repair
- Track Repair
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More on extension spring replacement, or everything we cover in Skokie.
Questions
Skokie questions about this job
One side of my garage door lifts higher than the other. Is that a spring?
Usually. On an extension system, one spring stretched or broken means the door pulls harder on one side, so it rises crooked and can wedge in the track. Stop operating it, because forcing a crooked door bends track.
Do both extension springs need changing if only one broke?
Yes. They went on together and have carried the same load for the same number of years. A new spring on one side and a tired one on the other guarantees an unbalanced door and a repeat visit.
How long do extension springs last in a garage that is not heated?
Cycle count matters more than temperature, but damp air and road salt in an unheated garage shorten it by corroding the coil and the end fittings. Most sets reach the end somewhere in the seven to ten year range under normal daily use.
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