If this has happened to you you can add more concrete to the floor in order to bring it back up to the right level.
How to adjust how far a garage door closes.
Open the garage door and watch it closely as it opens.
It is possible that the vertical track down the side has gone out of alignment and shifted due to a slightly loose lag screw.
To adjust your door close force use a step ladder to access your door closer.
Once the spring is free of tension remove from its track hanger.
1 you can align the track with the door itself so that the rollers work properly.
How to do a simple adjustment on a garage door opener.
Install a garage door threshold.
There are two ways that you can adjust garage door track.
Have a helper steady the ladder.
This will help you create a flat and level surface so the gap will close.
Identify the switches by the up or open.
Each garage door opener has limits which control the opening and closing heights of the door.
Check that it is straight.
These limits must be set correctly for the door height to have a proper seal as well as to allow for adequate clearance.
Place a stepladder beneath the box portion of the garage door opener.
Look for two limit adjustment screws.
By pushing the door back into position you should have made the vertical track straighten.
Find the limit switch and the adjustment screws that will allow you to adjust the position where your door stops when it closes.
You may need a flashlight.
If there s a slight gap at the bottom of your garage door then a garage door threshold is a great option.
Garage doors are very easy to adjust and can be done in less than 15 minutes.
These may be on the side of the box but are usually at the rear.
How to do a simple adjustment on a garage door opener.
Push the door back to adjust the door and get the center aligned again.
Adjust the springs on both sides of the door the same way.
If it was opening too quickly move it to the next lower hole.
With a screwdriver adjust these screws.
When the garage door opens about halfway or 5 feet from the ground and stops the up limit switch needs to be adjusted.
If the door was closing too quickly move the spring to the next higher hole on the bracket.