SBS Flanged Insert Drain

(1) Gypsum Deck Overlay: If required by design authority.
(2) Vapour Retarder: If required by design authority.
(3) Insulation: See available insulation products in the Accepted Materials section of this Manual.
(4) Insulation Overlay Board: Where required.
(5) Primary Membrane and Membrane Protection
(6) Mastic: As approved by manufacturer.
(7) Roof Drain Membrane Flashing: Onto primed drain flange or adhesive for non-bituminous flexible membrane systems.

NOTE: Refer to RoofStar Guarantee Standards for additional requirements.

Leader size is determined by using the calculation found in the BC Building Code at Appendix P.7.4.10 and Section 7.4.10.11 (Section 7.4.10.10 for gutters) in conjunction with the 15-minute rainfall value from the National Building Code, Appendix C.