TPO Conventionally Insulated System (Alternate)

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TPO Conventionally Insulated System (Alternate)

Division D - Construction Details

TPO | Conventionally Insulated System (Alternate) ( Article

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TPO Details


(1) Vapour Retarder
If required by design authority.
(2) Insulation
Mechanically fastened where deck type permits, or fully adhered (as illustrated). Installed according to RoofStar Guarantee Standards. See available insulation products in the Accepted Materials section of this Manual.
(3) Adhesive
Proprietary, installed according to manufacturer’s instructions, usually brushed, rolled or sprayed (3A: 2- part low rising insulation adhesive, specifically used to bond insulation and cover boards)
(4) Single-ply Membrane
Installed according to manufacturer’s instructions and RoofStar Guarantee Standards.
(5) Membrane Lap
Thermoplastic membrane may be welded or chemically bonded.
(6) Edge Flashing
Proprietary, coated with membrane material and heat-welded to the primary (field) membrane.
(7) Fascia Flashing Clip
Affixed to the fascia material (installed by others) with fasteners O.C. 300 mm (12”).
(8) Fascia Flashing
Manufactured to RoofStar Guarantee Standards for sheet metal flashings.
(9) Membrane Flashing
Adhered according to manufacturer’s printed specifications using proprietary adhesive. Must be carried to the outside of the parapet or vertically to a minimum of 200 mm (8”) above the finished roof surface. Welded or adhered to primary membrane depending on membrane type.


(A) Acceptable Deck
(B) Acceptable Parapet Surface
Surface must be smooth, dry and clean. Rough surface must be covered with treated plywood, to be determined by design authority or inspector or as required by manufacturer.
(C) Edge Blocking
(D) Fascia Material

NOTE: See the Standard for additional requirements.

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