Definition
A pair of long springs that run alongside the horizontal tracks and stretch as the door closes, common on older or low-headroom garages. Extension springs must have safety cables threaded through them — without one, a snapped spring becomes a steel whip flying across the garage. They also fall out of balance more easily than torsion systems. If your home still has extension springs, Door Serv Pro can add safety cables or convert you to a torsion setup during a spring replacement.
Why this term matters for homeowners
Repair and maintenance terms map to springs, cables, rollers, and tracks — the wear parts that decide whether your door fails on a January morning.
- Use this term to ask better follow-up questions during estimates.
- Look for this language in Learn and Evaluate guides to connect definition to decisions.
- Confirm how this applies to your specific door size, age, and daily use.
Related pages
Category: Repair & Maintenance