How To Measure Garage Door Extension Springs. For a one car garage door, carefully lower the garage door onto a bathroom scale in the center of the garage door. Determine the door weight and door height:
Ad excellence is our guarantee! How to measure if the spring is broken. This door would use two 210 pound lift extension springs.
For a double door use two bath scales, a.
Take the measurements to a garage door professional and they’ll help you find the right spring. Measure the overall length and. The second method requires you to measure and weigh the garage door. Extension springs normally stretch out to 67 when they are new.