02/10/2026
Beyond its distinctive glass-box form, the School of Arts Rooftop Studio Addition at Wits University, was carefully considered in response to the existing building, its surroundings and the needs of its users. In this post, we take a closer look at the project details and materiality.
The addition was designed as a lightweight structure to minimise the additional load imposed on the existing building. It comprises a steel column-and-truss structural system, enclosed by a curtain wall façade and sheeted roof.
A detailed sun and shadow study was undertaken to assess the impact of the addition on its southerly neighbours. To minimise both visual and overshadowing impacts, the new façade was set back approximately 1.2 metres from the edge of the existing oversailing roof slab - the maximum extent permitted by the existing structure. This setback accommodates a narrow walkway between the perimeter balustrade and the glazed façade, facilitating safe access for cleaning and maintenance.
The flush-glazed system comprises a combination of clear vision glazing and translucent spandrel panels, which conceal an insulated dry-lining behind the façade. The vision glazing is tinted to achieve the required solar control and specified with a low reflectivity to reduce glare onto the surrounding environment. Window openings on the eastern façade are veiled with perforated powder-coated aluminium screens, which reduce morning solar heat gain while bringing texture to the smooth glass.
The interior material palette was informed by the building’s academic function. Wall and floor finishes were selected for their durability and to support their use as display and pin-up surfaces for student art. The use of colour was deliberately restrained, creating a ‘blank canvas’ for student expression. In this way, the creative output of the Fine Arts students, rather than the architecture itself, defines the character of the internal spaces.
