Floating supports for loading solar panels, not of metal; floating supports not of metal for photovoltaic installations for electricity production; prefabricated supports not of metal, for charging solar cells; buildings, not of metal; building materials of plastic materials; synthetic building materials; floating structures not of metal for photovoltaic panels; roofing, not of metal, incorporating photovoltaic cells; roofing, not of metal, incorporating photovoltaic cells.