DuPont™ Tyvek® Trifecta™ - A2-Fire Rated Breather Membrane

• Installed into an external wall system, on mineral boards.
• May be used in any wall system, but most appropriate in metal frame ventilated façades that  require compliance with fire regulations.
• Suitable for all building types, including those of high risk and those above the 11 m/ 18 m fire safety threshold.

DuPont™ Tyvek® Trifecta™ installation (CAWS): See linked clauses for details.

Storage

Rolls of Tyvek® Trifecta™ should be stored palletised or on their sides on a smooth clean surface, under cover and protected from direct sunlight.

General

Care should be taken when handling the membrane in order to prevent tears and punctures occurring. Any that do occur should be repaired with DuPont™ AirGuard® FR System Tape (1310FR).

Application

Unroll Tyvek® Trifecta™ horizontally over the face of the construction. Ensure maximum coverage of membrane by extending 100 mm minimum below the lowest structural timber/steel member.

Fixing – to timber studs/sheathing

Fix Tyvek® Trifecta™ with stainless steel staples or corrosion resistant nails; a rubber or EPDM washer should sit between the screw heads and the membrane to avoid water ingress. Alternatively, fixings can be applied in the overlap section. Fix membrane at 600 mm centres horizontally, 300 mm centres vertically and at 150 mm centres at joints and openings.

Fixing - to masonry

Tyvek® Trifecta™ may be fixed to masonry with a suitable anchor fixing system or a masonry nail/screw and EPDM rubber washer. Fixings should be at maximum 500 mm centres.

Fixing - to steelwork (SFS)

Tyvek® Trifecta™ can be fixed to Steelwork with an appropriate mechanical fixing through to the steel structure, commonly suitable drill-tip or self-tapping screws may be used. The screws must sit flush (not countersunk) and a rubber or EPDM washer should sit between the screw heads and the membrane to avoid water ingress. Screw fixings should be spaced vertically at 500 mm centres on every stud (typically spaced at 600 mm horizontal centres).

Fixing - Rainscreen Cladding Applications

Tyvek® Trifecta™ may be fixed to the external face of a cement bonded particle board, external Gypsum board or other Euroclass A1/A2 rated sheathing, using a sheathing appropriate fixing. Appropriate fixings range from stainless Steel Staples for denser boards to drill-tip or self- tapping screws (with soft washers). See Fixing - to steelwork (SFS) above. Tyvek® double sided tape (1310D) can be used to seal laps at perimeters.

Initial fixings are preferable in the lap line or covered with AirGuard® FR System Tape (1310FR) to protect the membranes integrity.

In many cases, the retrospective fixing of cladding brackets (and insulation) will provide the principle security for the membrane. Care should be taken to ensure these components are fixed tightly over the membrane to avoid water ingress.

Laps

All horizontal laps should be 100 mm. Vertical laps should be 150 mm min.