Overflow drainage scuppers are typically holes with no downspout or other intricate designs and can be used with roof drains or with primary drainage roof scuppers.

The profile of specific components, their configuration or sequencing, can vary with the roof system, climatic differences, and regional or area practices. Dimensions as shown are recommended minimums and are intended to be approximate to allow for reasonable tolerances due to field conditions. Flashing or stripping ply should extend into scupper throat, and be fully welded

Flashing or stripping ply should extend into scupper throat, and be fully welded. Seal exterior of scupper at wall penetration. Continuous cleats are recommended when flashing face dimension exceeds 3 inches and in areas deemed a high-wind zone as categorized by local building code. 

The profile of specific components, their configuration or sequencing, can vary with the roof system, climatic differences, and regional or area practices.