What Causes Garage Door Cables to Snap?
Cables are the most-overlooked part of a garage door — and the one most likely to cause sudden, dangerous failure.
Humidity & Corrosion
Carolina humidity slowly attacks the galvanizing on cables. After 7–10 years, corrosion starts at the bottom drum (the wettest point) and spreads upward.
Improper Spring Tension
An over-tensioned spring jerks the cable on every cycle, eventually fraying it. Always have springs tensioned by a pro.
Door Off Track
A derailment can over-stretch a cable in a single event.
What to Look For
Inspect both cables monthly: any visible fraying, kinks, or rust = replace immediately. Both cables should be replaced as a pair.
Catch a fraying cable early — replacement is cheap; the door slamming shut is not.
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