If the tracks have become misaligned then it s not too difficult to fix them.
Sagging garage door opening.
This opening system is one of the most popular options but it can manifest a problem.
How to fix a sagging garage door step 1.
Visually inspect the rollers and their brackets.
Close the garage door.
Over time the drive chain can loosen and create slack.
Make sure you have enough light to work with.
Garage door started sagging and popping this last week.
The tracks keep the garage door rollers in line.
You can do this.
After closer inspection i found a fatigue fracture in the steel.
Using a ladder visually inspect both of the garage door tracks.
It could be the case that a strut needs to be installed in order to keep it working as it should.
Garage door sagging in middle fixing misaligned tracks.
This is to fix the fatigue and stren.
Overall this gives the opener less power to open and close the door.