SBS Through-wall Scupper Drain

Division D - Construction Details

SBS 11.3.2.5-2 Scuppers and Overflows (through-wall scupper)

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SBS Details

(1) Air or Vapour Control Layers: If required by design authority.
(2) Insulation: See available insulation products in the Accepted Materials section of this Manual.
(3) Insulation Overlay: Where required.
(4) Primary Membrane and Membrane Protection
(5) Base Membrane Flashing
(6) Metal Scupper with Hopper: The outside face of scupper to be minimum 37.7mm (1½") lower than the box height with a 12.7mm (½") drip edge. Installed in a 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).
(7) Mastic: Compatible with membrane
(8) Scupper Membrane Flashing
(9) Base Metal Flashing: Mechanically fastened (optional on flexible membrane systems).
(10)Metal Counter-flashing: Into reglet approximately 30 mm (1 ¼").

(A) Acceptable Supporting Deck Structure
(B) Air / Vapour Seal
(C) Wood Blocking: Optional with insulation cant strips.
(D) Plywood: If required by design authority. See the RoofStar Guarantee Standards.
(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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