3. On an extension, or stretch type spring there is little you can do to extend the service life. On a torsion spring (the type that is wound on a bar rather than stretching out) you can help ensure a full cycle life by lightly lubricating the coils of the spring to reduce friction. If your garage door sees a lot of use and spring failure is an ongoing concern it can be addressed by selecting extended cycle springs. Discuss this upgrade when calling in for spring service, your service advisor will assist in making the correct choice for your needs.
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.
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.