Next to Dilbeek's cultural centre and library, a petanque hall with outdoor courts and skate park will be provided. The building is located completely at the back of the plot, which offers a number of advantages: the outdoor areas and the associated action are maximally visible from the street, the perspective from the street to the nature reserve behind it is preserved and there is no too direct a confrontation with the small-scale houses across the street. The existing row of trees is retained and thinned at the bottom also to open up the view to the nature reserve. The building responds to the existing difference in level on the plot by placing the petanque courts located at the back slightly lower than the cafeteria. This way, there is a nice overview of the courts from the cafeteria and a view through to the green screen at the back. The petanque hall is a simple and compact volume with a butterfly roof shape that seeks a balance between optimal daylight penetration, passive solar heat and solar protection. The gallery located as a covered outdoor terrace between the cafeteria and the outdoor courts plays a crucial role in controlling light and heat. The building achieves the low-energy standard in a non-technical way and the materials are selected for their bio-ecological impact: a rational and light timber structure combined with hollow recycled concrete blocks that provide mass and thermal inertia.