The Complications
South Kensington's median home dates to 1956, which puts a lot of these garage doors on hardware that has never been touched since the house went up. That means original aircraft cable, often on a drum sized to a spec nobody follows anymore, wound tight around a shaft that's seen seventy winters of expansion and contraction. With only 2,836 households in the area, the housing stock runs fairly uniform - a lot of single-car openings built the same year, with the same gauge cable, aging out at roughly the same time. We also work this area as a cold-climate region, and cold matters here: galvanized cable gets brittle in hard freezes, and a strand that's been fraying quietly for a decade can let go on the first real cold snap of the season. The complication isn't exotic. It's just old metal fatigue meeting weather it was never rated to handle this long.
The Symptom
The early sign is usually one side of the door sitting lower than the other, or the door looking like it's hanging crooked in the opening. Sometimes you'll hear a popping or snapping sound right before one cable lets go entirely, and the door drops hard on one side or jams halfway. On older 1956-vintage hardware, you might also see rust bloom or visible fraying near the drum before full failure - worth a look if you're already in the garage. Once a cable comes off the drum or snaps, the door is under uneven spring tension and shouldn't be forced up or down by hand or opener.
Doing It Yourself
A garage door cable sits under serious spring tension, and that tension doesn't care how careful you are. Loosening the wrong bolt on a torsion system with a snapped cable can release stored energy fast enough to cause real injury, which is why we don't recommend DIY cable work, especially on hardware this old where the drum, shaft, and spring may all be original and more worn than they look. If the door is still moving and just squeaking or dragging on a roller, that's a smaller job you can look at yourself. A snapped or frayed lift cable isn't that job.
