SBS Conventionally Insulated System (typical)
SBS Conventionally Insulated System (typical)
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1 WORK INCLUDED
- (1) Gypsum Board
- Required when insulation is too thin to span flutes of steel decking (see RGC Guarantee Standard A2.5) or when required as a thermal barrier by design authority.
- (2) Vapour Retarder
- If required by design authority.
- (3) Insulation
- Mechanically fastened. (See Section 2.2 for accepted materials and Section 2.1.1 RGC Guarantee Standards A4.3 and A4.4.2).
- (4) Insulation 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. Torching directly to wood surfaces is not permitted.
- (6) Base Sheet Flashing
- Adhered according to manufacturer’s specifications using cold adhesive, hot asphalt self-adhered or torch applied to cover boards, or mechanically attached membrane. Torching directly to wood surfaces is not permitted. Must be carried over to outside of parapet or minimum 200 mm (8") above finished roof surface. (See RGC Guarantee Standards Section 2.1.1, A5.6, and Section 2.1.3, C8.5).
- (7) Cap Sheet
- Applied according to manufacturer’s printed instructions, all options.
- (8) Cap Sheet Flashing
- Applied according to manufacturer’s printed instructions to top of parapet or minimum 200 mm (8") above finished roof surface. All options.
- (9) Metal Flashing
- As required by RGC Guarantee Standards. (See RGC Guarantee Standard A6.9 and A6.10)
- (10) Primer
- Prime wood substrate to receive self-adhesive base membrane stripping.
2 RELATED WORK BY OTHERS
- (A) Acceptable Steel Deck
- (B) Plywood Backing
- Required on rough surfaces or where adhesive is asphalt. Must be primed.
- (C) Wood Blocking
- Sloped to roof where parapet is over 100 mm (4") in width. Must be primed.
NOTE: Refer to RGC Guarantee Standards for additional requirements.]