Take your measure between the garage door and wall.
How to fill in garage door gap.
Install a garage door threshold.
The flexible vinyl strip has to cover the gap to lay flush on the door and its part with the screw holes should face the side wall.
Https amzn to 2yolagt universal rubber garage door bottom.
They come with a rubber threshold and glue and sometimes a caulking gun too.
Use your scissors and cut this size.
You can buy them in any diy store and they re very easy to install.
2 measure the garage door height.
Shut the garage door and go outside to seal up all the gaps.
If there s a slight gap at the bottom of your garage door then a garage door threshold is a great option.
3 place the vinyl strip on the wall side where the wall meets the garage door.
Garage door stops strips of trim running along both sides and the top of the door opening cover the gaps between the door s edges and jambs and provide a weather seal by means of a flexible flap or flange that overlaps onto the door when it s closed.
Garage door strut reinforcement.
Lay down a strip of vinyl weather stripping and transfer the measured length on it.