Extension springs are a cheaper, more commonly used, and older system. They are mounted on both sides of a garage door with cables that attach the spring to the track on one side and the track supports on the other. Cables are also attached to the bottom brackets of each side of the garage door and run through a system of pulleys to the springs and the track. Extension springs extend and contract rather than twist as the door closes and opens. While they are cost-effective, they tend to wear out faster than torsion springs and can become dangerous if they snap under tension. Homeowners in Gloucester County often see issues with these springs during seasonal temperature swings, as metal fatigue can set in more quickly. For safety, any extension spring replacement or adjustment should always be performed by a trained garage door technician to prevent accidents and ensure proper system balance.