Ecover built the first ecological factory in the world in 1992 in Malle, Belgium, and her second ecological factory in 2007 in Boulogne-sur-mer, France. That factory is located at the first industrial area in Europe that has an ISO 14001 certification.
Both factories have green roofs. Such a roof provide an excellent thermal and acoustic insulation, both in summer and winter periods. Strategically aligned rooftop windows allow maximum daylight to enter the building, so that the need for artificial lighting can be limited. Construction materials were selected according to specific ecological criteria: materials produced with the least amount of energy, with minimum environmental contamination, reusable and produced from inexhaustible raw materials. Furthermore, a lot of attention is paid to location and energy and water use.
More detailed information you can find in the pdf document.