Roll up door are very simple and effective. The roll up doors shield your Pro•Tec building's interior space against energy loss and are available in a variety of colors. They roll up and will allow you more header clearance than the track door and are a more economical choice for having door access on the Pro•Tec building. They are either up or down, and operate much like a vertical truck tarp. There is a "down option" available. Which means when the door is closed, you can lower the top portion for top ventilation.