Architectural · A-HTHJG

Roof Scupper and Downspout Wall Detail

Materials

Elements

Walls Roofs Waterproofing / Flashing Drainage Connections / Plates Roof / Floor Openings

About this detail

This architectural detail shows a concrete wall penetration with a sixteen by twelve inch flashed scupper opening and a lock seam scupper flashing connected to an eighteen by ten by twelve inch deep twenty gauge galvanized leader head equipped with a one-quarter inch mesh strainer screen. The scupper box is positioned two inches above the finished roof, featuring one and a half by four inch overflow openings on each side and sealed at the concrete top and sides with hemmed edges. Below the leader head, a downspout runs down the exterior wall with two-inch wide bands with hemmed edges placed two feet maximum from the top and bottom and eight feet on center maximum in between. A quarter-inch steel downspout cover is mounted just above the cleanout using four half-inch diameter drilled anchor bolts with two on each side, installed so as not to hinder the use of the cleanout. A storm drain inlet is located twelve inches maximum above finished grade, tying into a typical cleanout for all downspouts and connecting to the site storm drainage.

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