How-To-Measure For Your New Residential Garage Door


Please use the drawing and instructions below to measure your garage door. Take these measurements to your local retailer to purchase a garage door.

Step #1 Measure door opening 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.

Step #2 Measure for sideroom: 3-3/4" is required on each side for installation of the vertical track for standard extension spring and standard torsion spring.

Step #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 the standard extension spring. 12" is required for standard torsion spring. If you have restricted headroom, special hardware is available. Additional headroom is required for installation of an automatic garage door opener. NOTE: If door height extends above the opening, the headroom measurement should be adjusted proportionately.