It may take a few trips up the ladder but resist the urge to tighten your door too quickly this can lead to busted springs and serious injury.
Tighten garage door torsion spring.
I have been in construction most of my life and i personally know a few garage door installers.
A quarter turn at a time will do it.
How to safely adjust your garage door spring.
The article provides installation instructions for springs and adjustment information torsion spring information.
I have worked on torsion springs and i must confess that it made me nervous.
Once your garage door is secured remove the spring hook from the track hanger which will allow you to move the hook and adjust the spring s tension.
Remove the winding bars and repeat the process on the other torsion spring before releasing the c clamps and testing the door.