70 Wilson Street, London

70 Wilson Street, London

Proteus HR, Proteus SC
A Studio

A striking and ingeniously-designed Proteus façade has helped transform a 1980s office building in the City of London into a Low Carbon Workplace.

70 Wilson Street has been refurbished and extended in collaboration with Low Carbon Workplace to create a highly efficient, futureproof office space with BREEAM Excellent rating based on low carbon standards.

This was a highly complex façade that pushed the limits of technical performance, design engineering and manufacturing capabilities.

Proteus worked with A Studio, the architects for 70 Wilson Street to overcome a number of project specific challenges.

Proteus Facades provided a series of panel systems all covered with a TECU Iron Two material in a number of formats, including solid honeycomb panels, perforated screens and insulated spandrel panels.

The main visual panels on Wilson Street include vertical and horizontal beam cladding of Proteus HR panels. These panels connect to structural aluminium PPC Proteus spandrel panels that have built in steel beams to assist in taking the loading of the external visual panels.

The perforated screens sitting in front of the Kawneer glazing system were designed to span floor to floor and incorporate steel framing within the panels, cleverly cloaked with the TECU material to blend into the overall façade. The connection of these Proteus SC brise soliel panels was integrated with the design of the structural spandrel panels so they visually look as though they are floating in the air.

At the higher levels of the building the panels are integrated with the Kawneer curtain walling system. The architectural team had designed a glazing pattern of 1500mm widths, creating the challenge of integrating the TECU Iron 2 material, which was available in a 1000mm maximum sheet width.

Proteus, working with the installer, JPJ Installations, designing a multi faced spandrel panel to overcome this issue. The glazing unit sizes we’re compartmentalised into panel cassette sizes that could be produced from the base material. These four panels were then joined together and formed into one spandrel panel with integrated insulation and structurally supported and tied together with horizontal steel cross members, before finally being anchored back to the curtain walling.

Once this engineering challenge had been overcome, a combination of Proteus cladding systems in TECU Iron Two – solid and perforated face formats – were specified by A Studio architects.

“We knew that the façade for 70 Wilson Street was going to present a number of engineering and manufacturing challenges,” said Nick Gazanis, Associate Architect at A Studio. “That is why we identified a façade supplier that had the expertise to cope with the refit, new build and facade retention elements of this project.”

He added; “In terms of façade engineering, 70 Wilson Street is a masterpiece, yet the observer is unaware of the amount of design ingenuity that went into creating what is a stunning overall aesthetic, because it is completely hidden behind the panels.”

The Proteus façade elements were specified in KME’s new TECU Patina Iron Two material, which was chosen by A Studio and the developer, Stanhope, because it combines an attractive natural copper surface finish, with the weathered look of steel. It retains all the benefits of copper, such as excellent formability and unrivalled durability, with long term low maintenance.

The material creates an ever changing aesthetic, depending on whether it is in light or shade, dry or wet. Its natural weathered appearance matures over time to create subtle mellow tones.

Additional scheduling complexity during installation of the façade arose because 70 Wilson Street is located in a very busy part of the City of London. This required planning of deliveries in fine detail and ensuring the façade elements fitted right, first time, with no margin for error. Proteus assembles all façade elements in its manufacturing facility to ensure they fitted on site.

The developer and owner of 70 Wilson Street is Stanhope. Main contractor was Wilmott Dixon. Façade installer was Essex-based JPJ Installations Ltd.


  • TECU Patina Iron 2
  • TECU Patina Iron 2
  • TECU Patina Iron 2