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.
Section 1503.2 Flashing: Flashing shall be installed in such a manner so as to prevent moisture entering the wall and roof through joints in copings, through moisture-permeable materials and at intersections with parapet walls and other penetrations through the roof plane.
The most important aspects of curb details are that they are designed at the proper height and there is sufficient termination of the flashing material.
Flashing terminations may be mechanically secured using metal termination bars or by stripping off into a recessed form of a reglet design. However, it is a best practice to follow termination designs that are in accordance with the material manufacturer's recommendations.
