Certified Building Contractor CBC1265305 · Certified Roofing Contractor CCC1334811
What does it mean when I hear a loud bang from the garage overnight?
A straight answer from a Florida state-certified contractor — then what you can check yourself and when to call. Free estimate: (954) 620-7812.
A loud bang from the garage in the night is often a garage door torsion spring breaking. The spring holds the door's weight, and when it lets go it releases all its stored tension at once, which sounds like a gunshot. A snapped cable, a slipped roller or a track that shifted can make a similar noise.
The nuance is that the door can look completely normal the next morning. A broken spring may not show from the outside, but the door will feel very heavy or refuse to lift, and the opener may strain or only run partway. Check the garage from the inside before you assume the cause.
Why it happens
Garage door springs are rated for a limited number of open-and-close cycles. Eventually the metal fatigues and snaps, and that can happen at any hour, including while the door sits closed. Florida's humidity and, near the coast, salt air speed this up by corroding springs, cables, hinges and track hardware.
Cables can also fray and snap under load, and a loose bracket or bent track section can pop suddenly as metal shifts. Temperature swings and settling can cause a single noise, but a loud bang that comes with a changed door is worth treating as hardware failure until proven otherwise.
The garage door is the largest opening in many homes. A door with a failed spring or damaged track may not hold up as designed in a high-wind event, so repair before hurricane season (June 1 to November 30) is worth planning.
What you can check yourself
Look at the spring from a distance
On a torsion setup, look at the bar above the door. A visible gap in the coil means it has broken. Do not touch the spring, the cables or the brackets at the ends, because they are under heavy tension.
Check the cables and tracks
Look for a cable hanging loose, frayed strands, a roller out of its track, or a bent track section. Just look; do not try to put anything back.
Try the door gently, once
Disconnect the opener with its release cord only if the door is fully down, and lift slightly by hand. If it feels extremely heavy, stop. Do not keep running the opener, which can strain it.
Rule out other noise sources
Walk the garage and check for anything that fell from a shelf or ceiling rack. Also check the entry doors and the exterior for signs of forced entry.
When to call a pro
Call a pro for any broken spring, damaged cable or bent track. These parts hold a heavy door and can injure someone if they are handled wrongly. If the door is stuck open, keep people and vehicles out from under it until it is secured. We can inspect the door and give you a free estimate with a written scope before work starts: call (954) 620-7812 or use the quote form.
If the inspection shows the door itself should be replaced, a permit is typically required for the door and its track and jamb anchoring, while spring, cable or opener repairs often are not. Confirm with your city or county building department. A permitted replacement usually goes from application to in-progress anchoring inspections where required, then a final inspection and permit close-out. Open or unpermitted work can surface at sale, refinance or insurance renewal. We work under Florida Certified Building Contractor CBC1265305, pull permits when the work needs one, and see the job through inspection and close-out.
What a pro will do
- Find the actual failureWe inspect the springs, cables, rollers, tracks, hinges and opener to see what failed and whether anything else was damaged.
- Repair or replace the hardwareSprings, cables, rollers and track sections are replaced as needed, and the door is balanced so it lifts evenly.
- Repair or replace the openerIf the opener was strained or damaged, it is repaired or replaced.
- Replace with a wind-rated door when neededIf the door is damaged beyond repair, we install a wind-rated or impact-rated door with the reinforcement its product approval calls for, under a permit.
Related questions
- Can I just replace a broken spring myself?
- It is not a good do-it-yourself job. The tension stored in the spring can cause serious injury, and a mis-sized spring leaves the door unbalanced. Have a professional do it.
- Does a spring repair need a permit?
- Hardware and opener repairs often do not, but replacing the door and its anchoring typically does. Rules vary by city and county, so confirm with your local building department.
- What product approval does a new garage door need?
- In Miami-Dade and Broward counties, the High-Velocity Hurricane Zone, doors need a Miami-Dade Notice of Acceptance (NOA). Elsewhere in Florida, they need Florida Product Approval, plus the wind-pressure rating for the site.
- Could salt air have caused the failure?
- It can contribute. Salt air corrodes springs, cables, hinges and fasteners, which weakens them over time. Homes near the coast may need more frequent hardware checks.
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