TPO Details:D3.7.6-4 Curbs & Sleepers (Mechanical Opening)

TPO/PVC Details

1) Gypsum Deck Overlay: May be required depending on insulation thickness or when required as a thermal barrier by design authority.
(2) Vapour Retarder: If required by design authority.
(3) Insulation: Mechanically attached or loose laid for ballasted roof assemblies. Installed according to RoofStar Guarantee Standards. See available insulation products in the Accepted Materials section of this Manual.
(4) Single-ply Membrane: Installed according to manufacturer’s instructions and RoofStar Guarantee Standards.
(5) Membrane Flashing: Adhered to curb according to manufacturer's printed specifications using proprietary adhesive. Must be carried to outside of parapet or minimum 200 mm (8") above finished roof surface. Thermoplastic membrane may be welded or chemically bonded.
(6) Metal Base Flashing: Mechanically fasten, standing seam at corners. Full width base flashing optional on flexible membranes. Partial skirt flashing minimum 75 mm (3") required on mechanical curbs that require flashing under metal flange.

(A) Acceptable Deck
(B) Vapour Retarder
(C) Mechanical Curb: Minimum 200 mm (8") and maximum 300 mm (12") above finished roof surface.
(D) Rigid Insulation

NOTE: Refer to RoofStar Guarantee Standards for additional requirements.