Roof Scuppers

(Also see "Roof Drainage")

A thru-wall overflow scupper near a drain on a TPO roof.

damaged exterior faceplate at a thru-wall scupper.

More Pictures:

1. Assorted Roof Scuppers on Commercial Low-Slope Roofs 

2. Putting New Thru-Wall Scuppers in an Old Parapet Wall.

Useful Links:

1. Building Codes: "1503.4.2 Scuppers" and "(P) 1503.4.1 Secondary (emergency overflow) drains or scuppers" in the 2015 International Building Code. Available on the UpCodes website.

2. Building Codes: "R903.4.1 Secondary (Emergency Overflow) Drains or Scuppers" from the 2015 International Residential Code. Also note exception 2 under subsection 1 under "Section R908 Reroofing". Available on the UpCodes website.

3. Technical: An excellent technical article on scuppers is available here at the website of the Copper Development Association. Provides construction details for various scupper types. They talk about scuppers being made out of copper in that article, but that doesn't mean that scuppers have to be made out of copper or that the information provided is only applicable to copper scuppers. (Copper is a great scupper material, though). 

4. Technical: Construction Details: Scupper/roof tie-in details for various roof types can be found at this page in the technical database at the Firestone Building Products' website.

5. Technical: Basic instructions for the installation of a thru-wall scupper box are available at the website of Metal-Era on this page