Should You Replace One Garage Door Spring or Both?

The honest answer from a garage door company that makes less money by telling you the truth.

The Answer: Always Both. Here Is the Math.

If your garage door has two springs (almost all residential torsion systems do) and one breaks, the second spring has been under the same stress, in the same salt-air environment, for the same number of cycles. The surviving spring is statistically at end of life.

Replacing only the broken spring costs approximately 60–70% of the paired price. But the second spring will fail — weeks or months later — and you will pay a second service call charge on top. Total cost of replacing one spring twice: more than replacing both at once.

The Salt-Air Variable in Miami Gardens

This math is more urgent here than anywhere else. In a dry inland climate, a spring rated at 10,000 cycles might have 4–5 years of remaining life when its pair breaks. In Miami Gardens — where salt air from Biscayne Bay accelerates corrosion in the coils and humidity cycles daily through the steel — the remaining spring may have 18 months to 2 years at most.

We have seen homeowners call us twice in a single year after initially choosing the “one spring” option. The total cost was $280 more than replacing both at the first visit would have been.

The Only Argument for Replacing One Spring

The only scenario where replacing one spring is defensible: your door is at the end of its usable life and you are planning to replace it within 6 months. In that case, replacing just the broken spring as a stopgap is reasonable. We will tell you that honestly, and we will tell you when we think you are in this situation.

Cycle Ratings and What They Mean

A spring rated at 10,000 cycles lasts one full open-plus-close cycle per use. A family using the garage door 4 times daily goes through 1,460 cycles per year. A 10,000-cycle spring lasts 6–7 years in that scenario — and 4–5 in Miami Gardens. A 25,000-cycle galvanized spring costs $40–80 more but lasts more than twice as long in this environment. We disclose the cycle rating on every estimate.

Questions? See our spring repair service page, the pricing guide, or call (786) 891-5011.