So that said if you have the space on the inside to move the tracks for the new door in all reality you wouldn t need to cut the door at all.
How to cut metal garage door.
Use a circular saw with a bi metal blade to cut along the bottom edge of the line removing the marked section from the bottom of the door.
If you really want to cut it and it has panels it doesn t seemnlike a good idea as it ll look off.
Roughen the surface of the metal garage door with a hand sander and medium grit sandpaper.
You ll need a variety of tools to complete this task exactly as i did it.
Sand the entire door not just the oxidized areas to help the primer stick to the door.
Gather tools and supplies.
Sand the bottom edge of the door smooth with a belt sander and remove the tape.
A garage door actually closes behind your opening.
How to cut and resize a steel clad entry door.