A.07 Masonry flashing - Where and why?

Flashings aren’t the only component in a masonry wall’s moisture defense arsenal, but they’re one of the most important. In this short video clip I review the basics of why, where, and how flashings are designed and installed.
From the ground up, the TMS 402 Code tells us flashings are required at base of wall, under every masonry sill, at any shelf angles and loose lintels, at low roof-high wall terminations, and at the tops of walls underneath masonry parapet caps.
In the sill detail shown, the flashing functions to prevent moisture before it ever has the chance to enter into the wall cavity. Note the vertical end dam at the ends of the flashing. At other locations, flashing collects and diverts moisture out of the wall through the weep vents. At the location shown, the flashing also allows independent movement of the different masonry materials above and below.
Critical elements like flashing, weep vents, and other components in the wall should only be entrusted to qualified installers. BAC union bricklayers are trained to install flashing with properly sealed laps, end dams, terminations, and transitions, providing moisture resistance for the life of the wall.
#Flashing #MoistureResistance #Masonry #DurableDesign

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