The paper presents a preliminary experimental campaign, which aims at investigating the possible application of carbon nanotubes to the mechanical improvement of timber structures. Different wood species are considered, as well as different solvents or resins as a dispersing media for carbon nanotubes.The experimentation is carried out on purpose exploiting exclusively the capillary properties of wood, in view of a possible on site application of the technique. Although still at a preliminary stage, these first results appear to be promising, and the research on the procedure is still in progress