Why It Happens Here
Druid Hills' median home dates to 1964, which puts most garages here a decade or more ahead of the typical build across the wider Norcross service area, where the median lands closer to 1977. That earlier build year matters because it usually means the original door opener and track were installed before the industry standardized on torsion springs mounted on a center shaft. A lot of these garages still run extension springs along the horizontal track, sometimes without the safety containment cables that became common later.
Extension springs stretch and wear differently than torsion springs. They fatigue from repeated cycling, and in a cold-moderate climate like this one, the metal contracts in winter and loses tension faster than homeowners expect. If your door feels heavier to lift by hand in January than it did in July, that's not your imagination. It's the spring telling you it's near the end of its cycle count, and on a house this age, that spring may never have been replaced.
What Can Go Wrong
On a 1964-era door, the extension spring itself is the most common failure, but it's rarely alone. The pulleys the spring runs through wear grooves over sixty-some years of use, and a worn pulley will fray a lift cable long before the cable is due. If you hear a metallic snap followed by the door dropping unevenly on one side, that's usually a cable off a worn pulley, not the spring itself.
The other failure point is the track alignment. Original steel track from this period was lighter gauge than what's installed today, and after decades of seasonal temperature swings it can bow slightly at the brackets. A bowed track makes the rollers bind, which strains the opener motor even on a door that looks fine from the driveway. We don't recommend forcing a door that's binding - that's how you turn a track adjustment into a motor replacement.
What It Costs
We don't have a fixed price list to quote here, and giving you a number without seeing the door would be a guess dressed up as a fact. What we can tell you is that the job type drives the cost more than the drive from Norcross does - a pulley and cable repair runs well under a full spring replacement, and a track straightening is different again from either. Given the household income in this area, we also see more owners choose to replace an aging opener outright rather than keep repairing a unit from the original installation, once a second component fails in the same year.
The Symptom
The one we hear most from Druid Hills is a door that reverses or stutters partway up, then drops back down an inch or two before stopping. On a door this old, that's almost always the extension spring losing enough tension that the opener's force sensor reads it as an obstruction and backs off. It's not a wiring fault and it's not usually the opener itself - it's the spring no longer doing its share of the lift. Letting it run this way wears the opener's gearing trying to compensate, which is the more expensive failure waiting behind the cheaper one.
