The Garage Door Spring "Explosion" Myth: What Really Happens

You may have heard horror stories about garage door springs "exploding." While the term is technically inaccurate, spring failures are still dangerous. Here's what actually happens—and why it matters.

Springs Don't Literally Explode

"Explosion" implies combustion—fire, heat, and gas expansion. That's not what happens with garage door springs. There's no fire, no chemical reaction, no explosion in the technical sense.

What does happen:

• The metal fatigues at a stress point
• The spring fractures suddenly
• Stored energy releases instantly
• The spring separates or unwinds violently
• A loud bang occurs from the metal snapping

But It Sounds Like an Explosion

When a spring breaks, homeowners often describe:

• "It sounded like a gunshot"
• "I thought a car hit the house"
• "It was like a bomb went off"
• "Something crashed—I thought a shelf fell"

The sudden release of energy creates a very loud bang. Many people check their garage expecting to find major damage, only to discover a broken spring.

The Real Dangers

Torsion Springs (Above the Door)

When torsion springs break, they generally stay on the shaft. The broken pieces remain wound around the tube. This is relatively contained, but:

• The unwinding can hit nearby objects
• The door may drop suddenly
• Anyone near the spring could be struck

Extension Springs (On the Sides)

These are more dangerous. Without safety cables:

• The spring can fly across the garage at high speed
• It becomes a metal projectile
• It can shatter windshields, dent cars, punch through drywall
• Anyone in the path could be seriously injured

Frequently Asked Questions

Related Articles

• Safety Cable Importance
• Spring Injury Statistics
• Spring Snapped: What to Do