Springs · Springwater
Garage Door Balance Adjustment
With the door closed, daylight shows under one bottom corner and the seal is squashed flat at the other.
In plain words
Older detached garages often have extension springs stretched along each horizontal track rather than a shaft above the door. Balancing these works differently: the tension comes from how far each spring is stretched when the door is closed, and it is set by moving the cable attachment along the track hanger or changing the hook position. Both sides are adjusted equally so the door stays level, and the containment cable running through each spring is checked at the same time. The door is opened and clamped so the springs are relaxed during the work, then tested by hand across its travel until it rests where it is left.
How the visit goesYou pulled the red cord to move the door by hand during the power cut, lifted it to about waist height and let go. Instead of staying put, it kept climbing on its own and thumped into the fully open stop.
Garage Door Balance Adjustment
How the visit goes
Cables, drums and whether the door sits level
A door that is out of level is usually a cable story rather than a spring story. The technician checks that each cable wraps its drum in a single neat layer with the same number of wraps on both sides, that the drum set screws are tight on the shaft, and that neither cable is frayed or rusting at the bottom bracket. A tape across the bottom of the door in the closed position shows whether one corner sits high. If it does, the cables are reset on the drums so the door is level before spring tension is judged, because a crooked door binds in its track and feels heavy regardless of how the springs are wound.
Securing the door before the first turn
Before any tension changes, the door is made immovable. The technician disconnects the opener, clamps a pair of locking pliers on the track just above a roller so the door cannot rise, and clears the area under the shaft. On a torsion system the springs remain wound while the winding bars are used to add or subtract turns, so nothing has to be fully unloaded for a simple adjustment. On an extension system the door is raised fully and clamped there, which relaxes the springs so the hooks and clips can be moved safely. This setup takes a few minutes and is what makes the adjustment itself calm and controlled.
Cables and level, checked with a glance
Once a month, with the door closed and the light on, look up at the drums and down at the bottom brackets. Each cable should wrap its drum in a single neat layer with the same number of turns on both sides, and hang taut without fraying or rust at the bottom loop. The gap under the door should be even from corner to corner. On an extension door, glance at the two springs for equal length and confirm the containment cable still runs through each. These take less than a minute and tell you the door is still level and the counterbalance still shares the load evenly.
Garage Door Balance Adjustment
In the van
Nylon or steel rollers
Cable drums
Winding bars
Extension springs and S-hooks
Door scale
Garage Door Balance Adjustment
What affects the quote
Condition of cables and drums
Cables that are fraying or drums with worn grooves found during the check are recommended for replacement while the system is being set, and quoted as their own items.
Cold-weather visits
In a cold snap, a frozen bottom seal or stiff hardware has to be freed and warmed before balance can be judged honestly, and a winter call is quoted with that in mind.
Opener adjustment and tests
Resetting travel limits and force settings on the opener and running the reversal tests is a short step that follows every balance job and is named in the quote when needed.
What to have ready
- When you release the door and lift it by hand, does it drift up, sink, or stay put?
- When were the springs last replaced or adjusted, if you know?
- Does the door behave differently in cold weather?
Garage Door Balance Adjustment: questions
QuestionsHow often does a garage door need a balance adjustment?
There is no fixed interval; the door tells you. Many doors go years between adjustments, especially when they are lubricated and the springs were sized correctly. A hand test each season is the reliable guide: if the released door holds at about a metre and stays fully open, it is fine. When it starts to drift or sink, that is the time.
Is this something I can do myself?
The hand test, yes, and it is a good habit. The adjustment itself is a job for a trained technician, because the springs, cables, drums and bottom brackets are under high tension whenever the door is closed, and the industry's own guidance reserves any change to them for someone with the right bars, clamps and method. Leaving that part to the visit keeps the whole thing uneventful.
Why does my door sink or slam down when released?
Not enough spring tension for the door's weight. Springs lose a little pull as they age through thousands of cycles, and a door gains weight when insulation, windows or a heavier seal are added. Either way the door outweighs its springs. Adding tension in measured quarter turns restores the hold, provided the springs are sound; if they are near the end of their life, new ones are the right answer.
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.