Polaris Apartments

Pyramid-shaped cladding and diamond geometry on sloped planes



144–154 Pacific Highway, North Sydney


Residential (218 apartments)


25 storeys (78.75m high)

Estimated cost:


Completion date:




Element Group Australia

Main contractor:

Parkview Constructions


Allen Jack + Cottier Architects

Facade installation contractor:

Highlight Aluminium

Facade manufacturer:

Austech Facades

Facade consultant:

TTW Facades

Facade specs & stats


Custom-designed drained and pressure-equalised diamond-shaped glazed skylight, panelised aluminium framed window wall, and unitised curtain wall with metallic textured rainscreen cladding

Facade area:


Largest panel

8m × 6.1m

Heaviest panel


Total no. individual Crazy Wall panels

Approx. 2,500

Total no. Crazy Wall diamond vision panels


Largest roof feature panel

8m × 6.1m

Sloped glazing with diamond geometry

Shallow-projection pyramid cladding


We custom developed the sloped roof glazing (the Kite) to suit the geometry of the angled planes of the roof. Its factory sub-frame has a drained and ventilated rafter system, and a continuous silicone gasket for floor-to-floor continuity of the drained rafter. We prefabricated each glazed panel with perimeter dry gaskets to eliminate the need for external access during installation.

A fully-unitised curtain-wall system facade (affectionately nicknamed the Crazy Wall) comprises hundreds of shallow-projection pyramids, pressed using a solid aluminium sheet. The system incorporates diamond-shaped inset windows.

  • Design development and waterproofing for the Kite roof glazing system
  • Ensuring safe buildability of the Crazy Wall at roof level

Kite system installation

Maximum sunlight in a high-density area

Safe buildability

The geometry and changing planes of the Kite facade system required great attention to detail. As well as waterproofing, we resolved all interface details while accounting for buildability and structural tolerances.

The Architect reverse-engineeded the building form to suit the site, sitting within daylight access limits without overshadowing neighbours. The Kite roof incorporates apartments and balconies, with accessible indents integrated in the glazed roof system.

We needed to ensure safety during the construction of the Crazy Wall at roof level. We did this by using a prefabricated cladding system pre-assembled in large modules, and installing it using the tower crane.

4 Parramatta Square

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