The new indoor Roller-skating Rink is actually an extension of an existing sports pavilion. The new volume contains the skating rink, the stands for the spectators, the climbing wall, as well as the additional spaces and vertical circulation. The continuous skin of the facade in corrugated steel sheet accentuates the volumetry of the pavilion, giving an abstract and a uniform appearance to it, while retaining the horizontality of the main facade of the existing pavilion. Both volumes integrate harmoniously one into each other, despite using distinct architectural languages. The formal simplicity involves order and an optimization of the interior spaces as well as the communication with the existing pavilion.