De La Roy contributed to the IJlst fountain by supplying the contour moulds for it. We milled these large EPS moulds in different sections. First, we created the pure EPS moulds that were used to cast the standard concrete. We then created a new set of moulds with an 80mm offset and equipped them with a polyurethane coating, so that they could be used for the terrazzo concrete casting. The contractor and the client both lauded the results and the smooth process of collaborating with De La Roy.