Extension Spring Replacement in Marlborough, MA
Extension springs run above the horizontal tracks on either side of the door and stretch — rather than twist — to store lifting energy. They’re common on older garage doors and lighter-duty installations.
Local context for Marlborough
Marlborough's winter climate is cold enough that garage door springs genuinely need cold-weather consideration, not just a general maintenance reminder.
Extension spring systems use a spring mounted above each horizontal track that stretches as the door closes and contracts to help lift the door as it opens, working through a pulley-and-cable system that redirects the force downward to the door itself. This design was the standard for decades before torsion systems became more common, and it’s still found on many older homes and some lighter residential doors today.
Because an extension spring stores energy by stretching rather than twisting on a fixed shaft, a snapped extension spring can become a projectile if it isn’t restrained — which is exactly why safety cables (a thin cable that runs through the center of the spring, anchored at both ends) are considered essential on any extension-spring door. A door with extension springs but no visible safety cables is a real hazard and worth flagging to a technician even before a spring actually fails.
Extension Spring Replacement problems we see in Marlborough
Cable and hinge cold-brittleness
Along with springs, lift cables can also become more brittle in extreme cold, increasing the chance of sudden failure alongside a spring.
Ice and snow interference near the spring assembly
Accumulated ice or snow at the base of the door can add extra resistance the spring has to work against, a common winter service call.
Door drops suddenly or closes too fast
A snapped or badly weakened extension spring can no longer control the door’s descent, causing it to fall faster than normal.
Rust or corrosion along the spring coils
Extension springs mounted near the tracks are exposed to more moisture and debris than shaft-mounted torsion springs, making corrosion a common failure driver.
Frequently asked questions
What garage door spring problems are most common in Marlborough?
The most common issues we see reported in areas like Marlborough are broken torsion springs, worn extension springs, and cable fraying near the spring drum — often tied to the local climate and age of the home's hardware.
What is a safety cable and why does my extension spring need one?
A safety cable runs through the center of an extension spring and anchors at both ends, so that if the spring snaps under tension, the cable keeps the broken pieces from flying loose. Any extension-spring door without visible safety cables should have them added regardless of whether the spring has failed.
How much does extension spring replacement typically cost?
Extension springs themselves are generally less expensive than torsion springs, but total job cost depends on whether pulleys, cables, or safety cables also need replacing. A local technician can give an accurate quote after inspecting the full system.