St. Louis Extension / Torsion Spring
On average Extension or torsion Spring changes for standard sized garage doors average between 150 to 250 dollars.
There are several types of spring systems designed to counterbalance your garage door. Torsion and Extension are the most common. The most important piece of information I can give you that many companies mislead customers about is:
What the spring is made of and how it was treated when it was manufactured "does not" determine the spring’s life expectancy. The life expectancy of the spring is determined by its wire size, diameter, and length.
Often companies will show different types of springs like oil dipped, galvanized or powder coated and try to convince you that one is longer life than the other and that is why it is going to cost this much instead of that much. Galvanized and Powder coated are great for coastal areas as a rust preventative but do not change the cycle life and do not cost but a few dollars more.
The Leading (scam) in the industry is the "LIFETIME WARRANTY". It sounds great when presented and seems fair and maybe even a good idea even though the initial cost seems pretty high (on average 450 - 700 dollars) what is not mentioned is the annual required cost (known as the required or annual door maintenance) to keep the warranty valid which if a standard 15,000 cycle spring/s is used should average Ten years, this annual service is usually 90 - 120 dollars. That would be another "900 - 1200" dollars invested in Ten years, that and the initial cost and you could buy two or more "completely new" doors in that time.
Other stipulations often used are:
- Warranty void if another company services the door.
- Warranty void if you move (renting out).
- Warranty void if not serviced by annual date.
If the "Warranty" is good ask f or the Warranty paperwork and read it before approving or signing anything that will bind you to the contract.
Things to Know about Torsion Spring s:
- Torsion springs must be measured while unwound or in a relaxed state or your dimensions will be incorrect.
- To match your previous size exactly, you will need to measure the wire size, the inside diameter, and the length.
- The length doesn't have to be completely precise (anything within a half inch will be fine)
- The wire size and inside diameter are critical, this is where most mistakes are made
- The number of turns is based on the height of the door and the size cable drums that you have (the rule for 7' doors is 7.5 turns and 8' doors is 8.5 turns and adjust from there)
- The direction of the wind on the spring is opposite the side that it goes on (ex: the left wound spring is installed on the right hand side of the door, as your standing inside your garage looking out)