In other cases the weight of the garage door in conjunction with an automatic garage door that is attached to the center of the door may be the cause of bowing.
Garage door sagging in the middle.
A wooden garage door may sag in the middle if it is bumped with a car or other large object in the garage but there are less obvious reasons that can cause such a door to sag.
There are several factors that may cause a garage door to bow in the center.
When it comes to shoring up that sagging garage door there are no quick fixes.
Most sagging garage doors are the roll up variety as opposed to the single planked swing up variety.
In some cases basic exposure to the elements along with temperature fluctuations may result in bowing.
A sagging garage header is essentially a structural engineering problem.
Indeed with a few turns of a screwdriver you can have that door level as concrete.
If the tracks have become misaligned then it s not too difficult to fix them.
Garage door sagging in middle fixing misaligned tracks.
You can do this.
There are things you can do yourself to fix the problem although they may not be as permanent as having a professional fix it.