Why It Happens Here
Chesterfield's housing runs from 1947 up through 2011
But the median build year sits at 1969, and most of the 55 named areas around here are still carrying that 1960s-70s stock. That matters for garage doors because a door installed or replaced in that era is now 50-plus years into a cold-climate duty cycle. Steel fatigues, galvanized cable strands fray from the inside out, and the lubrication in a torsion spring's coil wears thin long before the spring looks worn from the outside.
This is a cold, moderate climate band, not the Deep South and not the far north
That middle ground is deceptive. The freeze-thaw swing through a Chesterfield winter - cold nights, warmer days, cold again - puts more stress-reversal cycles on steel hardware than a climate that just stays cold all season. Springs and rollers that would hold up fine in a milder or steadier climate take a beating here precisely because the temperature keeps moving.
Add in that a lot of original openers and tracks from the 1960s-70s builds were never upgraded past their first-generation hardware, and you get a specific, predictable failure pattern tied directly to the age of the stock, not to generic wear
