SBS Flanged Insert Drain (Clamping Ring)

(1) Gypsum Board: Required when insulation is too thin to span flutes of steel decking or as thermal barrier when specified by the design authority. (See RGC Guarantee Standard A2.5)
(2) Vapor Retarder: If required by design authority.
(3) Insulation: Mechanically fastened where possible. (See Section 2.2 for accepted materials and RGC Guarantee Standard A4.4).
(4) Overlay Board: Asphalt adhered or mechanically fastened. Two layers required over heat-sensitive insulation. (See RGC Guarantee Standard C4.1)
(5) Base Sheet: Adhered to overlay board using asphalt, cold adhesive, self-adhered, mechanical attachment or torch applied according to manufacturer’s specification and to RGC Guarantee Standards. Torching directly to wood surfaces is not permitted.
(6) Mastic: Compatible mastic accepted by the membrane manufacturer.
(7) Base Sheet Flashing: Adhered according to manufacturer’s specifications and to RGC Guarantee Standards.
(8) Cap Sheet: Applied according to manufacturer’s printed instructions and to RGC Guarantee Standards.

(A) Acceptable Deck (B) Clamping Copper Drain: Primed and mechanically fastened. Installed in bed of compatible mastic.

NOTE: Refer to RGC Guarantee Standards for additional requirements.; Leader size is determined by design authority using the calculation found in the BC Building Code at Appendix P.7.4.10 and Sectionle 7.4.10.11 (Sectionle 7.4.10.10 for gutters) in conjunction with the 15 minute rainfall value from the National Building Code, Appendix C.