Figure 1: Plantation Place, double-skin façade >
interlocking cubic forms, rising up as a series of garden terraces. These roof terraces are both a remarkable natural amenity for the people who occupy the building and a biodiverse habitat of flora, fauna, insects and birds. The façade concept for the Ropemaker Place project
takes inspiration from the classic bay window. While the concept is informed by and expresses the solar control strategy, the design was enabled through early stage façade engineering and appropriate building physics analysis, combined with multi-scenario, multi- criteria building energy simulation.
The budget did not allow for a complex multilayered
façade and the design team responded by letting the geometry of a ‘single skin’ façade respond to the solar exposure of the different elevations. The façade is not excessively glazed and the windows are rotated away from the sun – east and west facing windows are rotated towards the north around a vertical axis, while the south facing windows are rotated around a horizontal axis, leaning forward (see Figure 2). The rotation means that an element of self-shading
is achieved, similar to what would have been attainable by means of fins and overhangs. A second order effect
Figure 2: Conceptual sketch and schematic showing the ‘rotation’ of the window
26
CIBSE Journal August 2010
www.cibsejournal.com
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