7 min read A2Z Garage Doors
Here's what most homeowners don't realize about garage door springs: they're not all built the same, and the type you have determines how your door behaves when something goes wrong. After 15 years on the trucks in Redwood City and the surrounding Peninsula, I've replaced hundreds of snapped springs, and nearly every homeowner I meet has no idea whether they're running torsion or extension springs. That gap in knowledge costs time, money, and occasionally a finger or two.
Your garage door weighs anywhere from 300 to 600 pounds depending on size and material. Counterbalancing that weight is the job of springs. Most residential doors use one of two designs.
Torsion springs sit horizontally above the door opening, mounted on a shaft that runs left to right. They twist (or torque) when the door moves, storing and releasing energy in a spiral motion. These are wound tightly and hold tremendous tension. One torsion spring typically handles the entire load on a single-car door, though two-car doors usually have two springs working in tandem.
Extension springs hang vertically on each side of the door track. They stretch and contract like rubber bands as the door opens and closes. You'll often see them with safety cables running through the middle. If an extension spring snaps, the cable is there to catch the spring and keep it from flying across your garage.
Redwood City homes tend to split fairly evenly between both types, though newer construction leans torsion for reliability and safety.
Springs last roughly 7 to 9 years under normal use, though that timeline shifts based on how often you open and close your door. A household using the garage five times daily will wear springs faster than a family that uses it once a day.
The primary culprit is metal fatigue. Springs are under constant stress, even when stationary. Moisture from the Bay Area fog accelerates rust and corrosion, weakening the metal from the inside out. Temperature swings also matter. A snapped spring often happens on a cold morning when the metal is brittle and contracted.
If you hear a loud bang or crack from the garage, that's almost always a snapped spring. The door will either hang awkwardly or refuse to open. Never try to force it open manually. A snapped torsion spring is especially dangerous because the shaft can whip unexpectedly.
**Need garage door springs in Redwood City today?** Call 626-761-0238. we cover same-day service across the area.
Many homeowners ask whether they can get away with replacing just one spring on a two-spring system. The short answer is no, and here's why. When springs work as a pair, they wear at roughly the same rate. If one snaps, the other is likely near the end of its life too. Replacing only one creates an imbalance, forcing your opener to work harder and shortening the lifespan of the remaining spring.
Our garage door spring replacement cost guide breaks down pricing in detail, but expect to pay between $200 and $400 per spring installed, depending on type and thickness. A full replacement of both springs typically runs $400 to $800 labor and materials combined. That sounds steep until you realize a broken spring can damage your door, opener, or both if left unaddressed.
The best insurance against a surprise snapped spring is routine maintenance. Annual inspections catch rust spots, worn cable sleeves, and springs showing signs of stress before they fail. If you're not already doing this, add it to your list.
Our garage door maintenance schedule for Redwood City homes covers inspection intervals and simple steps you can take yourself. Lubricate springs twice a year with a silicone-based lubricant, not WD-40. Keep the garage reasonably dry if possible, especially during rainy seasons.
If your door is older or you're uncertain about spring condition, schedule a free quote and let us assess whether replacement makes sense now or if you can wait another season.
Spring replacement is not a DIY job. The tension stored in a coiled torsion spring is equivalent to several hundred pounds of force. A slip during installation can cause serious injury. We've treated garage door injuries over the years that started with someone trying to save a few dollars.
When you call Garage Door Redwood City for spring service, we handle the full replacement, test the door balance, and adjust your opener if needed. Same-day availability is usually possible for snapped springs because we carry common sizes on our trucks.
Don't wait until your door is stuck to act. If you've noticed your door struggling to open, or if springs are over eight years old, reach out now. A small investment in proactive replacement beats an emergency call and potential property damage.
Call us at 626-761-0238 or get a same-day estimate online. We serve Redwood City and surrounding areas.
How do I know if my garage door spring is broken? A loud bang or snap is the classic sign. You may also notice the door won't open, rises unevenly, or the opener works but the door stays put. Never force it open manually.
Can I replace one spring if the other is still working? No. Springs wear as a pair. Replacing only one creates imbalance, overworking the remaining spring and your opener. Always replace both springs at the same time for safety and performance.
How long do garage door springs last? Torsion and extension springs typically last 7 to 9 years with normal use. Coastal humidity, frequent use, and poor maintenance can shorten that window considerably.
What's the difference between torsion and extension springs? Torsion springs mount horizontally above the door and twist to balance weight. Extension springs hang vertically on the sides and stretch like rubber bands. Torsion springs are generally safer and more reliable.
How much does spring replacement cost in Redwood City? Expect $400 to $800 for both springs installed, depending on type and labor. Single spring replacement runs $200 to $400. Get a free estimate by calling 626-761-0238.