Scupper drains

Exterior · Gutters and Downspouts · printed page 345 (PDF page 346)

Original page Sign in to save

Book index entries

Scuppers Downspout – and Gutter Gutter and Downspout

Text in the illustration

parapet wall
flat roof
secondary scuppers are typically located 2" above the membrane and act as emergency drains if the primary scuppers become obstructed
downspout
primary scuppers are at the level of the roof membrane

Generated explanation

The illustration shows a flat roof enclosed by parapet walls with rectangular scupper openings through the walls. Primary scuppers are positioned at the level of the roof membrane, and one is shown discharging into an exterior collector connected to a downspout. Secondary scuppers are positioned higher in the parapet walls. The annotation specifies that these are typically 2 inches above the membrane and provide emergency drainage if the primary scuppers become obstructed.

Components

flat roof parapet walls roof membrane primary scuppers secondary scuppers downspout collector downspout

Materials

roofing membrane roof surface aggregate