Repairing & Replacing One-Piece Garage Door Parts

Replacing Garage Hardware

  • When replacing hardware, it is very important to inspect the jambs for damage such as splits, cracks, termite damage, dry rot, or excessive numbers of drilled holes. The integrity of the jambs is of utmost importance, because the weight of the door and the force of the springs are both acting on the lag screws that secure the master plate to the jamb. It is never acceptable to mount a new set of hardware using existing lag screw holes unless at least one of the following is done:

    • Plug the existing holes using glue and wooden dowels.
    • Drill through the entire jamb and bolt the hardware in place using grade 5 bolts and nuts.
    • Add a steel support from the master plate up to the jamb.
    • Replace the existing jambs with new jambs.

    *Refer to Section V-a for minimum jamb specifications. Refer to manufacturers instructions for hardware replacement.

Replacing Garage Springs

  • When replacing a broken spring, a minimum of one spring per side should be replaced to maintain even balancing. Springs tend to lose tension after years of operation. The best practice is to replace all springs if they are more than five years old. Refer to manufacturer's instructions for spring replacement.

Replacing Garage Door Accessories

  • Truss Rod Kits

    Used for wood garage doors exceeding 10' in width to prevent door from sagging in the open position. Rods are typically mounted to the top and bottom rails of the door. Over an extended period of time, a door may tend to sag, in which case the truss rods may require tightening. Refer to manufacturers instructions for installation and adjustment of truss rods.

  • Slide Bolt Lock

    For locking the garage door with a padlock. Typically, the slide bolt is mounted 2 to 3 feet from the floor. A slide bolt may be used on each side of the door if desired.

  • Center Lock

    An alternative to a slide bolt lock that is operated from the center of the door and can provide locking on both ends of the door. Some center locks may also be operated from the inside of the garage.

  • Rubber Bumpers

    To prevent damage to the face of the door as it opens against the header. Bumpers are typically mounted to both ends of the header. Extra decorations on the face of the door must be considered when mounting the rubber bumpers. Bumpers can either be positioned to engage the thickest decorations, or they can be shimmed accordingly so that the decorations do not interfere with the header.

  • Lift Handle

    For manual operation of the door. Typically, door handles are mounted 18" to 24" from the floor.

  • Weatherstrip

    Mounted to the bottom and sides of the door to close the air gap
 around the door. Typically, weatherstrip is mounted to the sides of the door below the level of the master plate, and it is mounted to the door jambs above the level of the master plate. Refer to manufacturers installation instructions.