If the gap is less than 1 2 inch wide you can.
How to fill in garage door gap.
Garage door strut reinforcement.
2 measure the garage door height.
After shimming the jamb you still have a gap that can allow air to flow and covering this gap with casing doesn t always provide enough insulation.
If there s a slight gap at the bottom of your garage door then a garage door threshold is a great option.
Use your scissors and cut this size.
3 place the vinyl strip on the wall side where the wall meets the garage door.
They come with a rubber threshold and glue and sometimes a caulking gun too.
Https amzn to 2yolagt universal rubber garage door bottom.
Take your measure between the garage door and wall.
Shut the garage door and go outside to seal up all the gaps.
You can buy them in any diy store and they re very easy to install.
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.
Lay down a strip of vinyl weather stripping and transfer the measured length on it.