A new city-fringe residential building in Sydney is using two different LYSAGHT cladding materials to ensure the roofline maintains the good looks for many years to come.

evolve* is a 13 storey, 47 unit, exclusive waterfront apartment complex located at the Jackson’s Landing precinct at Pyrmont, to the west of Sydney’s CBD.

Designed by award winning architectural firm, JAHN Associates, for Lend Lease Development, the evolve* building comprises four large units per floor and features spectacular city and harbour views. Its 'floating' metal roof has been sculpted as a folding form, highly visible to traffic moving across the nearby Anzac Bridge.

The unique design incorporates 400sqm of LYSAGHT LONGLINE 305 roll formed from COLORBOND Ultra steel in the colour Surf Mist, which was used for the roof cladding.

The soffit was clad in 400sqm of PERMALITE, marine grade aluminium cladding, roll formed in SHOREDEK profile in the colour Glacier White.

PERMALITE marine grade aluminium and COLORBOND Ultra steel are specialised solutions in the LYSAGHT cladding range for environments where salt air or airborne pollution are present.

According to Graham Jahn, a project consultant, COLORBOND Ultra steel and PERMALITE cladding give them creative freedom in their designs that is not afforded by other roofing materials when building within close proximity to the coast or harbour.

As evolve* building is lower than surrounding complexes, it is important to make the roof a feature aspect of the overall design. Jahn also wanted it to complement the highly textured facade, which is a unique stone pattern designed by Jahn Associates using colour oxide reinforced concrete. The roof is a membrane held taut with structural support poles which are as thin as possible. The poles tilt out to stabilise the roof and to create an open fair weather space.

The SHOREDEK and LONGLINE 305 sheets were 18m long and they had between four and six roof fixers on site at any one time for 12 weeks.

According to Jon Trotman, they had a tough timetable to adhere to and the support they received from BlueScope Lysaght was exceptional. The order was exact and they helped with technical support, Auto-Cad design and logistics. They also delivered everything on time and as needed, so as to minimise any downtime for the fixers.

Each of the 240 sheets was cut to size before despatching to site so the fixers only had to shape a few sheets. This led to great efficiency and time savings as well as significantly reducing wastage.

Holes were precisely cut in the soffit by the roof fixers to accommodate the exposed sprinkler system. This was co-ordinated with the sprinkler installers who had to set safety switches as each sheet was installed.