There is a wide range as well when it comes to choosing the material of the garage door. You can choose any one from Steel, fiberglass, plain old wood or polyethylene base don your requirements. Steel doors are the strongest and most durable, whereas high density polyethylene doors never dent, rust or fade and do not require to be repainted. Fiberglass doors can also be an option if you want some natural light to pass through as these materials are translucent and also maintenance free. Conventional wooden doors would well fit into your budget and requirements but the low initial cost might be deceiving as the maintenance cost is relatively higher than the other options; wooden doors require regular check ups for warps and rotting.
With a torsion type of spring, the energy is imparted or removed by rotating the spring clockwise or counter clockwise depending upon the direction of usage. With professional installation, the complete loading of the torsion spring is controlled by the garage installer, and is determined by the weight and size of the garage door that it is operating. When this type of torsion spring fails, it remains attached and intact to the location on the horizontal control rod where it was mounted. I have not heard of or seen any torsion spring fly across a garage, creating injury from failed components as with the stretched older style garage door springs. This is not to say that injuries have not occurred with the torsion style spring. The installation of this type of spring is generally safe when left to a trained garage door installation professional. Severe and serious injuries have occurred when untrained, unqualified individuals have attempted to install or service this type of spring.
In contrast to an overhead type of garage door, be it sectional or single panel, roll up doors have a totally different type of operating system. When these doors are used, they can be concealed in an overhead or under mounted trough. These doors operate similarly to a roll top desk door except for how they are stored when not in the closed position. They normally coil as they are retracted, and require significant gear trains to reduce the effort required to move these doors up and down into position. Often the forces needed to move these roll up doors require a reduction type of transmission that allows a very heavy door to be operated effortlessly.
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