Telling Rainscreens Ltd

Extrusion is a continuous manufacturing method in which a plasticised clay body is forced through a die to produce a long, uniform profile that is later cut and fired into individual façade elements.

This streamlined, mechanically repeatable workflow is at the core of extrusion’s sustainability advantage.

Another sustainability benefit of extrusion is its exceptionally efficient use of raw materials. Because the process forms continuous profiles, almost every kilogram of clay that enters the extruder becomes part of a finished product. Off-cuts generated during trimming are easily reintroduced into the clay mix with virtually no material loss.

Compared to slip-casting or hand-moulding, which rely on wetter clay bodies and produce more waste during demoulding and trimming, extrusion operates with a drier, more compact mix. This reduces the overall volume of water required and significantly cuts down on drying time.

Energy use is one of the largest environmental burdens in manufacturing and in the manufacturing of terracotta, the drying and firing processes consume the most energy, so any reduction in moisture content directly translates to lower carbon emissions.

Because extrusion allows precise control of wall thickness, manufacturers can create hollow, lightweight units without compromising structural integrity. Lighter façade elements reduce the need for heavy substructures, improving the overall embodied carbon profile of the building envelope.

Extrusion has transformed terracotta façade manufacturing into a highly efficient, environmentally responsible process. By minimising waste, reducing energy consumption, enabling lightweight and durable designs, and delivering consistent quality, extrusion stands out as the most sustainable method for producing terracotta building elements.

Argeton is one of the world's leading manufacturers of extruded terracotta cladding. Contact our team of specialists at Telling Rainscreens to find out how extruded terracotta can help you achieve your environmental goals.

https://tellingrainscreens.co.uk/extruded-terracotta/