Garage Door Spring Replacement and Types of Garage Door Spring Replacing a garage door spring is an essential maintenance task that needs to be done periodically. It's important to understand how a garage door work and the types of springs used to replace them successfully. • Torsion springs are the most common type of garage door spring. The top of the springs is attached to a pulley system, which is attached to the bottom of the garage door. As the spring unwinds, the force causes the spring to twist and rotate the pulley, which lifts the garage door. Torsion springs are available in single-torsion and double-torsion forms. • Extension springs are attached at the bottom of the garage door in the top of the spring to the garage door opener. As the spring is pulled, it unwinds and lifts the garage door. Extension springs are found in single-extension and double-extension spring systems. • Contractor springs - Torsion springs are similar to contractor springs. Still, they use a heavier gauge wire and a smaller diameter pulley, and most contractor springs are designed to be used only in single-spring systems. If you're in need of Garage Door spring Replacement in Scarborough? I recommended for you Dortech Garage Doors. https://www.dortechgaragedoors.ca/garage-door-spring-replacement/