Archetech Issue 43 2019 | Page 107

As a listed building protected by English Heritage, it was essential that the redesign by ADP architects retained as many of the building’s original features as possible, including the copper Terpsichorean female figures or ‘dancing ladies’, which were restored and positioned on top of two redeveloped Cupolas. Alongside this was the addition of a bold extension featuring Proteus SC perforated TECU Patina, which was applauded by the judges when ADP’s vision for Spanish city secured a RIBA North East Award 2019. ADP Architects specified TECU Patina for Spanish City, a copper material that features the natural green patina from the outset, as it created a beautifully aged aesthetic that complements the ‘old’ copper finish of the dancing ladies. The homogenous pattern featured on the Proteus SC perforated cladding covers the entirety of the new extension at Spanish City, making it difficult to discern the position of the different floors and giving the structure a monolithic presence that is able hold its own against the imposing dome on the original building. Choosing round perforations or ‘holes’ was no accident, it creates a contrast with the right angles of the surrounding cityscape, but mirrors the internal layout. A defining feature of the building is its extremely complex geometry, in fact only four rooms have walls in a square format, every other space is curved or a polygon, including the impressive rotunda which the panels were designed to meet. The Proteus SC TECU Patina perforated copper cladding panels were fixed over extensive glazed areas at Spanish City, so both sides were visible by people inside the building and from those outside. This presented an engineering challenge because the architects envisaged large perforated panels due to the sheer size of the façade (larger cladding panels on large facades can look more visually striking), which can require thicker gauge metal. Working with ADP architects Proteus devised a rear supporting aluminium PPC framing system that was discrete and avoided having to increase the thickness - and cost - of the copper material. The outcome was that it enabled the panels to be designed to meet the maximum optimisation of material, whilst meeting the challenging geometry of the project. THE HOMOGENOUS PATTERN FEATURED ON THE PROTEUS SC PERFORATED CLADDING COVERS THE ENTIRETY OF THE NEW EXTENSION AT SPANISH CITY.