SBS 2-Part Retrofit Flashing (Cable Penetration)

(1) Gypsum Overlay 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) Vapour 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) Insulation Overlay: As required. 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 with membrane
(7) Base Sheet Flashing: Adhered according to manufacturer’s specifications, using cold adhesive, self-adhered or torch applied. Must be carried up flashing and terminate under hood flange. Torching directly to wood surfaces is not permitted. (See RGC Guarantee Standards Section 2.1.1, A5.6, and Section 2.1.3, C8.5).
(8) Cap Sheet: Applied according to manufacturer’s printed instructions and to RGC Guarantee Standards.
(9) Cap Sheet Flashing: Applied according to manufacturer’s printed instructions and to RGC Guarantee Standards. Must be carried up flashing and terminate under hood flange.

(A) Acceptable Deck
(B) Wood Blocking
(C) Two Piece Flashing: Assembled around protrusion, laid in bed of compatible mastic on top of base sheet. Mechanically fasten two componentstogether and fasten flange to wood blocking or deck.

NOTE: Refer to RGC Guarantee Standards for additional requirements.