How Do You Fix a Sagging Garage Door?

To fix a sagging garage door, determine the cause of the sag and adjust the tension rods, add a steel beam or consult a professional. When working on a garage door, open the door, ensure the power is off to the opener, stabilize the door and follow all safety precautions outlined in the owner's manual to ensure a safe working environment.

In order to repair a sagging wooden garage door:

  1. Determine the cause of the sag
  2. The first step to repairing a sagging garage door is determining the cause of the sag. Gravity and the heavy weight of the door are both common culprits to sagging doors. After determining the cause, proceed as necessary.

  3. Adjust the tension rods
  4. If the garage door is getting harder to open because of a sag in the middle of the door, adjusting the tension rods may solve the issue. The tension rods are attached diagonally from the top to bottom corners and feature a turnbuckle that can be tightened. Make small adjustments and give the door time to adjust before making additional changes.

  5. Add a steel brace
  6. If adjusting the tension rods does not solve the issue, consider supporting the door with a steel beam. At least two people are required for installation of a steel beam, and the beam is bolted on to hold the extra weight. Jack up the door to the proper position before bolting on the beam.

  7. Consult a professional
  8. Repairing a garage door can be dangerous work, especially for novices or for difficult sags. Consult a professional for advice or a quote to address a sagging garage door.