The complexity of the program related to the simplification of the circulation within the site define a bi-articulated volume. The roof unifies and cover all the functions. Therefore, a canopy unfolds covering vacuum space and leaving free field of vision beyond the carwash. The tunnel of the car wash unfolds along the road Gembloux. Broken lines of the roof edge define the scenography of the motorist. Added to this a set of full and empty rhythm suggesting the washing steps. The black steel clad building defines the identity of the company Holz rolls. Refinement and class to own the brand, the project uses architecture as a medium of advertising.