Wood wastes are more and more often used in different wood waste valorisation industries (panels, wood energy, cement factories, ...). These industries are in progress to include in their processes, wood wastes coming from demolition wood. A state of the art and an analysis have been made to propose : (1) diagnostics methods to carry out a classification of wood wastes on demolition sites and in the sorting sites based on analytical methods, (2) routes to carry out the classification of wood wastes (according to products present in wood wastes : biocides, finishing products, and according to French regulation requirements). Some proposals are discussed.