If it's higher than four feet off the ground, or lower than three feet, you'll know it needs to be realigned. Use a ladder as a brace to keep the door safely open while you're working on it. This also takes the pressure off the springs so you can inspect them for rust and warping.
Amarr The program is backed by two suppliers: Amarr builds garage doors and LiftMaster manufactures garage door openers. Amarr, Costco's garage door supplier since 2005, has built a reputation for manufacturing quality products since it began focusing on garage doors in the 1960s.