TPO Details:D3.7.8-3 Water & Drainage (Clamping Spun Copper Drain)

RoofStar Guarantee Standards are blue-linked

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) Mastic: Compatible mastic or sealant.
(6) 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.

(A) Acceptable Deck
(B) Roof Drain: Mechanically fastened and coated with adhesive as required by manufacturer. Installed over compatible sealant.

NOTE: Refer to RoofStar 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 Section 7.4.10.11 (Section 7.4.10.10 for gutters) in conjunction with the 15 minute rainfall value from the National Building Code, Appendix C.