Every garage door uses springs to counterbalance its weight—150 to 250 pounds you'd otherwise be lifting by hand. The two systems are torsion springs (mounted above the door on a shaft) and extension springs (mounted along the horizontal tracks). Here's the honest comparison from a Chattanooga repair shop that installs both every day.
Mounted on a shaft above the door, wound under tension to a calculated IPPT (inch-pounds per turn). Last 10,000–30,000 cycles depending on rating. Quieter, smoother, safer in failure (contained on the shaft), and easier to balance. Cost more upfront ($345–$485 pair installed).
Stretch along the horizontal tracks above each side of the door. Last 8,000–15,000 cycles. Cheaper upfront ($185–$285 pair installed). Louder operation. Failure mode is dangerous without safety cables (the spring can launch across the garage)—we never install extension springs without safety cables.
If you have an attached garage, a heavy insulated door, or a two-car door, torsion is the only right answer. For light single-car detached garages with low headroom, extension can be a budget option. We're happy to give you both quotes and let you decide.
Calls before 2pm are almost always closed the same day across Hamilton County and North Georgia.
A real person answers 423-583-9355 nights, weekends, holidays. Average response 60–90 minutes.
Written quote approved before any work. No diagnostic fee stacked on top of repairs.
Lifetime manufacturer warranty on most installed door panels and a written labor warranty on every repair.
Live dispatcher · 60–90 minute response · Same-day service across Chattanooga, TN.
Same fast response and pricing across Hamilton County, North Georgia, and surrounding Tennessee suburbs.
Call 423-583-9355 for same-day, written-warranty service across Chattanooga, TN and surrounding cities.
