During a visit to review curtain wall assemblies on a project under construction, we noticed something unrelated—brick ties supporting a cantilevered through-wall flashing drip plate at a window opening in the exterior masonry. This unusual condition invited further examination of the cavity wall construction.
The importance of understanding the flashing design principles and installation requirements between the masonry wall assembly and the roof flashing system cannot be understated. All too often, the exterior masonry walls of a building structure are thought of as being watertight and require little or no maintenance.
Designers are creating new and exciting contemporary masonry designs that demand clean, smooth wall plane elevations. One challenge that can interfere with unobstructed aesthetics is the visual effects of masonry drip-edge flashing. This potential obstacle has also carried through to traditional masonry design.