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

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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 (Section for gutters) in conjunction with the 15 minute rainfall value from the National Building Code, Appendix C.

RoofStar Guarantee Standards for TPO/PVC Roof Assemblies

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