NRCA has released three stand-alone manuals: NRCA Guidelines for Architectural and Metal Flashing Systems; NRCA Guidelines for SPF Roof Systems; and The NRCA Construction Details Manual.
Since nearly 75 percent of all reported roof leaks occur at flashing locations, such as terminations, walls and penetrations, these are the points where we see the most detail concerns.
Securement of flashing at outside corners proves to be a difficult task. The adherence of the flashing material can be compromised due to the angle of the transition.