How to Level a Metal Garage Door to an Uneven Floor

A garage door must be level in order to operate properly. Wood doors are usually scribed at the bottom to accommodate an uneven floor. However, scribing is not possible when installing a metal garage door. Leveling a metal garage door to an uneven floor requires making adjustments to the track during the installation process. This ensures that the track that houses the garage door rollers is level with the door. Leveling the door is the first part of installing your metal garage door.

Step 1

Place the bottom section of the metal garage door in the opening.  The section should overlap each side jamb equally.

Drive a 16d nail halfway into the jamb beside each end of the door section.  Bend the top of the nail over the section to hold the section into place.

Step 2

Lay a 4-foot level across the top of the bottom section.  Insert wood shims under the low side of the door section until it is level, allowing the shims to protrude from the end of the panel.

Step 3

Insert the rollers into the bottom fixtures and top hinges on each end of the door section.  Position the vertical track around the rollers on the end of the door that is on the floor.

There should be a space of 1/2 inch between the end of the door and inside of the door track. 

Step 4

Secure the bottom bracket of the vertical track to the door jamb with a 3-inch wood lag and impact wrench. 

Step 5

Place the second vertical track around the rollers of the opposite end of the door.  Space the track as you did the first, allowing the bottom of the track to rest on top of the protruding shims.

Secure the bottom bracket of the track to the door jamb with a 3-inch wood screw.  The remaining sections of the door will now be level as you stack them onto the bottom section.

Things You Will Need

  • 16d nails
  • Hammer
  • 4-foot level
  • 3-inch wood lags
  • Impact wrench with sockets


  • Continue with the remaining installation according to the instruction manual that comes with your door.
  • If you need to level a metal door that is already installed, contact a service professional. The springs must be disengaged from the door to relevel the door sections.

About the Author

Kenneth Crawford is a freelance writer with more than 10 years of experience. His work has appeared in both print and online publications, including "The American Chronicle." Crawford holds an associate degree in business administration from Commonwealth College.