the earlier type the door will slide upwards into fully open position.
But one disadvantage with the type of single panel doors is you should park your car several feet before the front door for avoiding collapse by the door. In sectional garage doors there are about eight panels which normally slide up fully. You can find lot of shops which sell good quality garage door springs Seattle by browsing the internet.
The torsion springs are the essential part of garage doors which consists of a pair of springs placed on steel shaft. The system is located on the header wall and usually consists of a bearing plate at the center having nylon bearing and two other bearing plates placed on both ends. If you raise the door, the torsion springs unwind and lifts the door upwards by the movement of the shaft, by rotating the cable drums.
Similarly when you close the door, the cables inside unpack the drums and makes the torsion springs to get full tension again. You can buy quality garage door springs Seattle from the agency located in your area. If there is any problem in the torsion spring it must be attended to immediately.
Since the torsion springs are controlled by full tension, if you want to change them or repair them hire a good mechanic who is expert in dealing with garage door torsion springs. If there is imbalance in the tension the spring may fall apart causing sudden fall of door which is very dangerous. Normally the life of the garage door lasts for minimum 10,000 cycles of rotation which works out for at least 3 years. As you add more weight on the garage door like including glasswork or finer coats of paint will reduce the life of torsion spring. The garage doors may also get broken due to poor maintenance or having loose tracks. Applying grease to the garage doors may paralyze the proper functioning of the doors.