A new commercial building in Stockholm is defined by its carefully detailed facades of Nordic Brass Weathered pre-oxidised copper alloy from Aurubis.
In the Nattugglan neighbourhood on the island of Södermalm, developer Vasakronan has replaced an inefficient and outdated office block with a new, ‘LEED Platinum’ certified modern building. The new Folkungagatan 44 project provides 22,000 m2 of space, largely for offices but also including conference spaces, plus retail outlets and a restaurant on the open, street-facing ground floor.
Equator Stockholm Architects’ design for the new building reinvigorates its pivotal location with clearly announced entrances, better connectivity and interaction with the Catholic Cathedral and other surrounding community buildings. Its massing comprises a five-storey block with two further storeys, each stepping back to generate ‘living roof’ gardens.
The building’s strong presence in the city is defined by its almost classically structured facades of fenestration and Nordic Brass Weathered cladding with a natural colour that complements its surroundings. Carefully detailed and executed flat panels, ‘fluted’ mullions and horizontal mouldings between windows, copings and other details align clearly expressed vertical joints throughout.
Subtle varied surface
The Nordic Brass Weathered copper alloy provides a rich, naturally varied brown surface with a high quality, timeless character. The surface is created by burnishing at the Aurubis copper mill, providing straightaway the same oxidised brown surface that otherwise develops over time in the environment.
Lead architect Louise von Bahr said: ‘We wanted the cladding to have a contrasting mix of qualities. It should have personality but at the same time be subtle. And we wanted to create a modern look but also matching the Cathedral next door. We decided to use Nordic Brass Weathered cladding designed in a way that picks up on the historical context – but in a refined and minimalistic way. In the end we are very happy with the results.’
Sustainability Agenda
The Nordic Copper alloy cladding also adds to the building’s ‘LEED Platinum’ certified sustainability agenda. Nordic Copper architectural products and alloys are manufactured using 100% recycled raw-material, and copper’s ability to be recycled repeatedly – without any loss in performance – is an important sustainability benefit.
Copper is a natural element within the earth’s crust which has been incorporated into living organisms throughout the evolutionary process. It requires no decoration, maintenance or cleaning, saving resources, cleaning chemicals and cost, and its lifespan can be regarded conservatively as 200 years, subject to substrate and structure.
Extensive Range
The Nordic Copper range of architectural copper and alloy products is available from Aurubis, part of the world’s leading integrated copper group and largest copper recycler. It includes Nordic Standard ‘mill finish’ and Nordic Brown pre-oxidised copper offering lighter (Nordic Brown Light) or darker shades of brown determined by the thickness of the oxide layer.
The extensive Nordic Blue, Nordic Green and Nordic Turquoise ranges have been developed with properties and colours based on the same brochantite mineralogy found in natural patinas all over the world. As well as the solid patina colours, ‘Living’ surfaces are available for each with other intensities of patina flecks revealing some of the dark oxidised background material.
Copper alloys include Nordic Bronze, Nordic Brass and the innovative Nordic Royal – an alloy of copper with aluminium and zinc, giving it a rich golden through-colour and making it very stable. A wide choice of Nordic Decor mechanically applied surface treatments is also available for various surfaces and alloys, particularly suited to interior applications.
Safety and Sustainability
Copper and its alloys enjoy unique characteristics particularly in terms of safety, sustainability and long-term performance. With an ‘A1 (non-combustible material)’ fire classification to EN 13501-1, copper is inherently fire-safe and suitable for cladding tall buildings, using appropriate constructions. It is also, therefore, rated ‘Class 0’ surface spread of flame, making it suitable for internal wall and ceiling surfaces. Particularly important today, copper is non-toxic and its inherent antimicrobial qualities make it ideal for touch surfaces.
A growing series of on-line ‘copper stories’ exemplify the best in contemporary architecture and showcase the diversity of surfaces, forms and applications available with Nordic Copper today. For more information visit: www.nordiccopper.com or email: NordicCopper(Replace this parenthesis with the @ sign)aurubis.com