This can happen when the door has shifted to one side causing it to appear uneven.
One side of garage door higher than other.
When this happens you need to shift it back into position.
There are several things that can cause this.
The most common cause of overhead type doors being out of level is frayed cables that grow in length as they fray.
Repair a crooked garage door with help from a garage door specialist in this fr.
A crooked garage door could potentially be the sign of a much larger problem.
Retest the door balance as you did in step 1.
If you have a 1 gap under the door it isn t necessarily that the door is crooked.
Or it could just be that the hardware has become loose over time.
It may be the spring.
If you ve had your door for a while or are in and out of it a lot it can easily end up out of alignment.
The door runs are housed in a garage door track one on each side of the garage door.
When the door is placed directly on the floor and it s not level it causes one side of the door hinge or latch side to be higher than one another.
If you mean that one side of the garage door is lower than the other and that it hasn t always been this way then you do have a problem.
If it was opening too quickly move it to the next lower hole.
The door should be parallel to the header.
The replacement garage door should be one that hangs above the front of the garage and lowers down from the outside so it doesn t affect the height of the garage.
If the concrete sags on one side you do not adjust the door to fit it.
Maybe someone bumped into it recently.
The easiest way to solve this problem is when installing the door space the jambs off the floor when possible.
It also depends a lot on the number of years the door has been up as it could be that the door springs have become worn.
Chord length on shaft.
An alternative would be a pocket garage door that slides sideways on tracks from within the garage door itself so that again the height or width are not effected.
If the door was closing too quickly move the spring to the next higher hole on the bracket.
Adjust the springs on both sides of the door the same way.
Arc length on shaft.
The most likely cause is that the floor is not perfectly level.