There are several things that can cause this.
Liftmaster garage door has gap at bottomdoes not close evenly.
At least that s the theory.
The reasons your garage door has a gap in it could be.
How to adjust a garage door to close completely.
Garage floor may have cracked or shifted 2.
Garage door seal may be damaged 4.
Garage door sensors may not be aligned correctly 3.
First you need to see what has caused this to happen.
Garage door openers make life convenient.
This can happen when the door has shifted to one side causing it to appear uneven.
You ll never need to step outside to get your car in or out of the garage again.
An out of balance garage door can close too quickly creating a potential hazard for kids and pets and placing unnecessary strain on the door s parts.
The most simple and common is door shift.
If your door has a gap on one side or the other when it s closed the problem is most likely due to a break or other issue with one of the extension springs.
This video demonstrates what do if your garage door won t close and the lights on your liftmaster garage door opener are blinking.
Some times you need to adjust the garage door.
When this happens you need to shift it back into position.
Garage door opener malfunction or door has shifted.
It also depends a lot on the number of years the door has been up.