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.
One of the most critical details on remedial applications is the tie-in detail between the existing waterproofing application and the new waterproofing application.
Applications of flashing at cast-in-place penetrations (such as pipes or vents) are similar for both vertical and horizontal waterproofing applications.
