Marc Sherratt Architects is a research-led, impact-driven practice. Having designed one of the first net-zero certified buildings on the continent, founder and architect Marc Sherratt designs for people and the environment in equal measure.
How is the use of sustainable materials evolving in the industry?
The focus has shifted to addressing embodied carbon — the emissions tied to mining, manufacturing, transport, construction, and end-of-life of materials. In South Africa, cost remains the main driver, but in the EU, reusing buildings is prioritised. Where new construction is necessary, the goal is to use material combinations with the lowest embodied carbon. These decisions are guided by data via Whole Life Carbon Assessments (WLCAs), with the UK’s RICS Version 2 being the current best practice. Reducing carbon begins with the structure, then the envelope. Making use of performance software like One Click LCA helps us measure carbon early and encourages local sourcing.
What new approaches to sustainable materials are you exploring?
In Zambia, we’ve used tree bark waste from FSC-certified forests as cladding and reclaimed steel. Rather than outlawing hardwood, we’re working on a system to formalise its use, ensuring economic and ecological responsibility while training local labour in innovative building techniques. We’re also producing Hydraform bricks from construction waste. With research and creativity, there are always opportunities to transform what would otherwise be left in a landfill into meaningful design elements.
Where do you draw inspiration from for sustainable design?
We study local vernacular architecture and observe how native wildlife adapts to the environment. There’s deep wisdom in what’s already there. We start by asking: when is the building used? In rural areas, vernacular buildings separate functions by time of day. We apply a similar logic, supported by climate modelling. Fabric-first design, appropriate insulation, thermal mass, and orientation come first — ventilation then follows. If a project needs air-conditioning, we consider that a design failure (with exceptions like medical spaces).
