Our garage door header has been sagging that led to the one piece garage door catching to the header. Whenever we closed the door, it would make a bang when it would close completely. We had over 4 people over trying to fix the problem, and with 4 quotes. We finally found a family friend who came over and said we really need to change the header that went across the top of the door. He bought a 20 feet piece from Northern Building, price was right and the guy working there was really helpful.