There are several reasons. Here are just a few. We Heliarc Weld the door corners together, which provides for the strongest bond possible. A lot of Home Center's storm doors are screwed together using corner gussets made of plastic! The Fox Weldoor Uses an interlocking hinge system with bronze bushings and steel hinge pins. Every Fox Weldoor comes with a heavy duty extruded screen frame. Most storm door manufacturers use a light weight rolled stock for their screen framing.