Flat roof drainage systems

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

Book index entries

Drainage – Systems for Flat Roofing Drainage Systems Roof – Drainage Systems – Flat Downspout – and Gutter Gutter and Downspout

Text in the illustration

leakage common at scupper
parapet wall
scupper drains
potential leakage area at drain
internal drainage system
drainage
gutter mounted at low end of roof
gutter and downspout

Generated explanation

The illustration shows three drainage arrangements for flat roofs. The scupper arrangement directs water through openings in a parapet wall, with an exterior downspout shown and a note identifying scuppers as common leakage locations. The internal drainage arrangement shows roof surfaces sloping toward a central roof drain, identified as a potential leakage area. The third arrangement directs water toward an open low roof edge equipped with a gutter and exterior downspout. Arrows indicate the direction of roof runoff.

Components

flat roof parapet wall scupper drains internal roof drain gutter downspout

Defects shown

Potential leakage at scuppers Potential leakage at internal roof drain

Related illustrations

0121

Flat roof drainage systems

· p. 28

Three building diagrams illustrate alternative flat-roof drainage arrangements. The scupper arrangement drains through openings in parapet walls, with an exterior downspout shown and a callout identifying leakage as comm

0088

Flat roof drainage systems

· p. 23

The illustration shows three drainage arrangements for flat or low-slope roofs. One roof drains through scuppers in parapet walls, with an exterior downspout shown at one outlet and a note identifying leakage as common a