The assessed kit for ventilated external wall cladding mechanically fixed named “ALBOND SZ” (family C) is based on thin metallic composite panels “albond^®” PE and “albond^® FR” which are manufactured by the ETA-holder. This cladding material is mechanically fastened to a subframe, fixed to the external walls of new or existing buildings (retrofit). An insulation layer can be fixed on the external wall.