The proper way to measure your door



  1. Measure existing door width and height in feet and inches. This determines the size of door needed. The rough opening should be the same size as the door.
    Width: ________________ Height:_________________

  2. Measure for sideroom: 3-3/4" is required on each side for installation of the vertical track for standard extension or torsion springs.
    Sideroom: _____________________________________

  3. Measure area labeled "headroom"-distance between the top of the door opening ("jamb header") and the ceiling (or floor joist). 10" is required for standard installation of extension springs, 12" on standard torsion springs. If you have restricted headroom, special hardware is available. Low headroom hardware is available to reduce requirement to as low as 4-1/2" (minimum with standard extension spring).
  4. Note: If door height extends above the opening, the headroom measurement should be adjusted accordingly.
    Existing headroom: _____________________________

    Headroom needed: ______________________________

  5. Measure area labeled "backroom"-distance is measured from the garage door opening toward the back wall of the garage.
    Backroom: _____________________________________
    Common garage door sizes include: 8' wide x 7' high, 9' wide x 7' high and 16' wide x 7' high. Holmes manufactures most doors in nearly any size you require.