Springs · Springwater
Torsion Spring Replacement
You heard a sharp bang from the garage, and now the opener hums for a second and gives up.
In plain words
On a door with two springs, replacement usually starts with a conversation about scope. Both springs have completed the same number of cycles, so when one breaks the other is typically close behind, and replacing the pair together gives the door two matched springs sharing the load evenly. The technician explains what the installed system is, how each spring is loaded and what the door's weight calls for, then fits and winds the springs as a set. The result is a balanced door with a fresh cycle life on both sides rather than a repair that may be repeated soon.
How the visit goesLooking up at the coil above the door, you can see a clean split with a gap of several centimetres between the two halves. The rest of the spring looks fine, but the door has become almost impossible to move by hand.
Torsion Spring Replacement
How the visit goes
Reading the spring itself
The first measurements come from the spring that is already on the shaft. The technician measures wire thickness across a run of ten or twenty coils, the inside diameter of the coil, the overall length of the spring when relaxed, and the wind direction, which is read from how the coils lean. On a two-spring door each spring is checked separately, because a left-wound and a right-wound spring sit on either side of the centre bracket. Any tag or colour marking is noted too. These numbers narrow down what the door was built with, and together with the door's weight they point to the correct replacement.
Winding with control
Winding is where a spring takes on its working tension, and it is done with two solid steel bars sized to the holes in the winding cone. The technician stands to the side of the cone, inserts one bar, turns a quarter turn, inserts the second bar, and transfers the load from bar to bar so the spring is never held by less than a full bar. The number of quarter turns is counted against the door height and drum type. When the count is reached, the spring is stretched slightly toward the drum and the set screws are tightened to the shaft while the last bar still carries the load.
Your spring on record
The technician leaves you with the specification of what was installed: wire size, inside diameter, length, wind direction and the cycle rating chosen, along with notes on any bearings or cables replaced. Keep that record with the door's paperwork or photograph it. It means future service starts from known numbers rather than fresh measurement, and if a door section or opener is ever changed, the installer can confirm the springs still suit the door's weight. Many technicians also mark the installation date on the spring or centre bracket so the age of the system is easy to read later.
Torsion Spring Replacement
In the van
Cable drums
Wire gauge and tape measure
Torsion springs, oil-tempered or galvanized
Socket set and wrenches
Garage-door spring lubricant
Torsion Spring Replacement
What affects the quote
Damage from the break
If the opener was run against a broken spring, the top section may be bowed, the trolley bent or a hinge strained. Correcting these so the balanced door runs on straight hardware adds to the scope.
Oversize or non-standard doors
Very wide doors, tall doors, carriage-house doors with heavy overlays and light-commercial doors may need duplex springs, multiple springs or larger drums, which changes both the hardware and the method.
Anchoring to the header
A centre bracket with pulled lag bolts, a split header or a corroded bracket needs refastening, reinforcing or replacement before the spring can be wound, which is included when found.
What to have ready
- About how many times a day does the door open and close?
- What is the door made of: steel, insulated steel, wood or aluminum?
- Is the door currently closed, open, or stuck partway?
Torsion Spring Replacement: questions
QuestionsAre springs different for a heavy wooden or insulated door?
Yes, and this is exactly why the door is weighed. A solid wood door or a thick insulated steel door can weigh far more than a single-skin steel door of the same size, so it needs heavier wire, a larger coil or a second spring to balance. The technician measures the actual weight and selects accordingly, so the finished door lifts as easily by hand as a lighter one.
Will the new spring look the same as the old one?
Not necessarily, and that is fine. The paint colour on the winding cone or coil is a code that identifies wire size and wind direction, and different suppliers use their own schemes, so a matched replacement can carry a different colour than the spring it replaces. What matters is that the wire size, diameter, length and wind direction suit the door's weight and height, which is confirmed by the balance test.
What photos help when I call?
A picture of the full spring assembly above the door, showing the centre bracket, both drums and how many springs there are, tells the technician a great deal. Add a close shot of the broken spring gap and any tag or colour marking on the cones, a photo of the cables at the bottom brackets, and one of the opener. These help confirm the door's configuration so the right springs and hardware are on the truck.
Related services
- Garage Door Hinge ReplacementWatching from inside as the door opens, you can see the gap between the second and third panels open up on one side as they turn the corner into the ceiling, then close again.
- Garage Door Track Repair or ReplacementHalfway up, the door lurches and one roller rides onto the lip of the channel.
- Garage Door Cable ReplacementSomeone left the snow shovel leaning in the opening and the door came down on it.