SBS Open-wall Scupper Drain

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SBS Open-wall Scupper Drain

Division D - Construction Details

SBS | Open-wall Scupper Drain ( Article

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SBS Details


(1) Air or Vapour Control Layers
If required by design authority.
(2) Insulation
Mechanically fastened. See available insulation products in the Accepted Materials Division of this Manual.
(3) Insulation Overlay
Where required.
(4) Primary Membrane and Membrane Protection
(5) Metal Scupper with Hopper
The outside face of scupper to be 37.7mm (1½") lower than the box height with a 12.7mm (½") drip edge. Installed in a thin bed of compatible mastic. Interface between outside wall and scupper should be caulked with appropriate sealant. Installed when wall finish is complete prior to completion of roofing or sheet metal (e.g.: re-roofing).
(6) Scupper Membrane Flashing
(7) Membrane Flashing
(8) Base Metal Flashing
Mechanically fastened. Optional on flexible membrane systems. Required on assemblies using gravel ballast filter mats.
(9) Metal Cap Flashing
Fasten with continuous concealed clip-type fasteners or cladding screws evenly spaced between seams. Flashing 8 and 9 may be one piece.


(A) Acceptable Supporting Deck Structure
(B) Air / Vapour Seal
(C) Wood Blocking
(D) Acceptable Wall Surface - Plywood
Conform to the requirements for Walls in 2.6.2 Materials.
(E) Wall Finish
Interface between outside wall and scupper to be caulked with appropriate sealant. Installed by trade responsible for outside wall finish if roofing and metal flashing has been completed prior to exterior wall finish.

NOTE: See the Standard for additional requirements.

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