04 March 2021
Cob building is a construction technique that’s been around since prehistoric times. It’s been used for centuries in the south-west of England, while more than 30 per cent of the world’s population are still living in buildings that are constructed out of earth. The main materials used are subsoil, straw, water, and occasionally lime. The beauty of cob is that, depending on location, the subsoil can be extracted from the site itself, making it a very low impact construction technique.
Cob has seen a revival in recent times, as we look to sustainable forms of construction to meet our climate and energy targets. Although it’s not suitable for every application, the benefit of its very thick walls (around 600mm) are good thermal mass and insulation, which help to reduce temperature fluctuations through the extremities. As with any form of construction, a ‘good boot and hat’ (foundation and roof overhang) will go a long way to keep walls dry and sound.
We understand cob construction, along with many other forms of low-impact and sustainable construction techniques. Talk to us about the possibilities for your architectural project.