Gwilen is the name of the longest river in Brittany, the Vilaine. Yann, founder of GWILEN, grew up on the banks of its estuary.
Since the construction of a dam in the 1970s, this estuary has gradually silted up. So much so that today, it is estimated that about 100,000 cubic meters of sediment would have to be extracted each year for it to recover its natural appearance.
Architect and engineer, Yann saw in these materials a potential resource for new construction materials. This is how he started developing a transformation process to solidify these sediments, with the criterion of limiting energy consumption during the transformation process.