SBS Basic Curb

(1) Gypsum Deck Overlay: :Required when insulation is too thin to span flutes of steel decking (See RGC Guarantee Standard A2.5) or when required as thermal barrier by design authority.
(2) Vapour Retarder: If required by design authority.
(3) Insulation: Mechanically fastened. See available insulation products in the Accepted Materials section of this Manual.
(4) Insulation Overlay Board: Asphalt adhered or mechanically fastened. Two layers required over heat-sensitive insulation.
(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) Base Sheet Flashing: Adhered according to manufacturer’s specifications, using cold adhesive, self-adhered, or torch applied to cover boards, or mechanically attached membrane. Torching directly to wood surfaces is not permitted.
(7) Cap Sheet: Applied according to manufacturer’s printed instructions and to RoofStar Guarantee Standards.
(8) Cap Sheet Flashing: Applied according to manufacturer’s printed instructions and to RoofStar Guarantee Standards to top of curb.
(9) Metal Flashing: As required by RoofStar Guarantee Standards.

(A) Acceptable Deck
(B) Air / Vapour Seal
(C) Wood Blocking: Minimum 200 mm (8") in height. (See asphalt adhered or mechanically fastened. Two layers required over heat-sensitive insulation. Cant is optional).

NOTE: Refer to RGC Guarantee Standards for additional requirements.