The slat facade, System 624, from MLL Hamburg, is a facade system made of aluminium with a free ventilation cross section of 50%. The system 624 is equipped with a sliding-water safe, Z-slat of the medium series of type 020. Fastening to a facade occurs via the Retaining rail 004. The slats are fastened with the MLL clip system and are also removable afterwards for repair work on on the facade or similar purposes.