On average, to have your springs replaced on your garage door will vary anywhere from $200 to as much as $400 if you were to hire a professional. Breaking the costs down, the springs, depending on the part needed and the size, will cost about $20 to $60 each. Add in the labor, which can be $45 to $85 per hour, depending on your location, can bring the grand total to the estimate noted. A tilt-up door, on average, will be about 20 to 30 percent less than a roll-up door.
Determine the inside diameter of the spring and the size of the coils. Run a tape measure across the opening at one end of the spring. Carefully measure the inside diameter of the spring so you can provide the supplier with this information. Then, use a tape measure to find the length of 10 coils on the spring. Divide the length by 10 to determine the measurement of a single coil.
My garage door torsion spring broke so I decided to replace it myself. Shipping was next day. I got the torsion spring rod at a local hardware store. Easy to install once I figure out how to lock down the rod from moving and loosening the door cable on the side. Instructions tells you how to do it. Great replacement spring and save $$$ doing it myself. https://m.youtube.com/watch?v=Z_eZc-kh40c
A standard double garage door is 7 ft. high by 16 ft. wide. Standard single doors are 7 ft. high by 8 or 9 ft. wide. Because the doors are so large, few home centers and only some garage door stores keep many doors in stock, so expect to order one instead of buying it off the shelf. Garage doors are available in wood, fiberglass and steel. Steel doors, like ours, are light, maintenance-free, affordable, readily available, and have an insulating value as high as R-19.