Metal flashing embedded in a wall that covers and protects the top edge of the roof flashing below it.
The portion of a two-part flashing assembly that is embedded into a vertical surface (such as a wall, parapet, or chimney) and laps over the base flashing below it. Counterflashing protects the top edge of the base flashing from water infiltration and allows independent movement between the roof and wall assemblies. It is typically made from sheet metal (copper, galvanized steel, or aluminum) and is set into reglets or mortar joints.
Lead-coated copper counterflashing was set into saw-cut reglets in the brick parapet and sealed with polyurethane caulk.
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