Garage Door Spring Replacement: What You Need to Know (Don't DIY This!)

Garage door spring replacement is the single most common — and most dangerous — garage door repair. Each year, hundreds of homeowners are injured attempting DIY spring replacements. Here's everything you need to know.

Torsion Springs vs. Extension Springs

Torsion Springs

Located horizontally above the garage door opening. These are the most common type on modern doors. They work by twisting to store mechanical energy. When one breaks, you'll often hear a loud bang.

Extension Springs

Located on either side of the door, running parallel to the horizontal tracks. More common on older and lighter doors. They stretch to store energy. Both springs typically need replacement at the same time — if one breaks, the other is near the end of its life.

Why You Should NEVER DIY Garage Door Spring Replacement

• Torsion springs store massive amounts of energy — enough to cause severe lacerations, broken bones, or death if released uncontrolled.
• Proper installation requires specialized winding bars and precise torque calculations based on door weight.
• Incorrect spring sizing can cause the door to crash down or fly open violently.
• Professional technicians carry proper insurance — if an injury occurs, you're protected.
• The cost savings of DIY ($150–$250) are not worth the risk of a hospital visit.

How Much Does Spring Replacement Cost?

Professional torsion spring replacement typically costs $150–$300 for a single spring and $200–$350 for both springs. Extension springs are slightly cheaper at $75–$150 per spring. Most technicians recommend replacing both simultaneously to save on the service call fee.