Step #1 Measure the width and height of the door opening in feet and inches, which will determine the garage door size  you need. The finished opening should be the same size as the door. 

Step #2 Measure for sideroom - 4" is required on each side for installation of the vertical track for standard Torsion Spring System. 

Step #3 Measure area labeled “headroom” – distance between the top of the door opening (“jamb header”) and the ceiling (or floor joist). 12" is required for standard Torsion Spring System. 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. 

Step #4 Measure area labeled “backroom” – distance is measured from the garage door opening toward the back wall of the garage. Door height plus 18" is required. Additional backroom may be required for installation of an automatic garage door opener. 



How-To-Measure For Your New Residential Garage Door: 
use the drawing and instructions to measure your garage door.
2" X 6" FRAMING FOR TORSION SPRING
BACKROOM
FRAME JAMB
2" X 6" FRAMING
(BACKJAMB)
FRAMING TO BE FLUSH
ON BACKSIDE OF OPENING

OPENING
HEIGHT
OPENING
WIDTH
HEADROOM
Residential & Commercial
Quality Door Systems Since 1965