What is a perimeter roof edge? The term can mean different things to different design and construction professionals. The technical definition of a perimeter roof edge is a termination and transition between the roof and other building components. Because it is normally the part of a roof that is the most visible, some consider it an aesthetic feature of the building's exterior. In reality, it is a roof system's first line of defense in a wind event; aside from the roof membrane itself, it is the most critical component of the roofing system.
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