SBS Plumbing Vent (Conventional Roof System)

Division D - Construction Details

SBS 11.3.3.3-1 Penetration Flashings (plumbing vent)

Notice to Reader
Images used in a Construction Detail are representative and not prescriptive. Nor are they necessarily drawn to scale. Rather, they are provided to visually convey the requirements of the Standard they represent. Unless otherwise required by the Standard, dimensions, the selection of materials and their application remains the responsibility of the Design Authority. The full text of the referenced requirements in the Standard may be read by using the blue hyperlinks

SBS Details

(1) Supporting Deck Overlay: If required by Design Authority.
(2) Air or Vapour Control Layers: If required by Design Authority.
(3) Insulation: Mechanically fastened. See available insulation products in the Accepted Materials section of this Manual.
(4) Insulation Overlay
(5) Primary Membrane and Membrane Protection
(6) Mastic: As approved by manufacturer.
(7) Membrane Flashing: Onto primed metal flashing flange or adhesive coated for non-bituminous flexible membrane systems.
(8) Storm Collar, Typical Lead Cap or Typical Aluminum Cap: Re-roofing only. Non- bituminous flexible membrane skirt collar, sealed with compatible sealant and stainless steel hose clamps for use with pipes that extend above flashing.

(A) Acceptable Supporting Deck Structure
(B) Plumbing Stack: Extend to match top of metal flashing. Aluminum flashings are required for torch-applied roof systems.
(C) Wood Blocking: Optional.
(D) Metal Flashing: Apply in a bed of mastic. Fastened over membrane to wood blocking or roof deck.
(E) Typical Aluminum Cap: For use with aluminum flashing. See requirements for Settlement Caps on strip-in plumbing flashings.
(F) Typical Lead Cap: For use with lead flashing.
(G) Storm Collar: Non-Bituminous flexible membrane skirt collar, sealed with compatible sealant and stainless steel hose clamp. Use with pipes that extend above flashings.

NOTE: See the Standard for additional requirements.

© RCABC 2024
No reproduction of this material, in whole or in part, is lawful without the expressed permission of the RCABC Guarantee Corp.