The flashing element is the most vulnerable part of any roof system because it is the point at which the horizontal roof deck and vertical surface join. It is also the intersection of two different materials, such as is the case with parapet walls.
Prefabricated roof curbs have been in use since the roof has been utilized for something other than keeping weather out. And in this one sentence lie the benefits and the detriments we face in the roof curb business everyday. The primary function of the curb is to keep weather out while supporting/flashing the equipment on it.
