The low natural durability of certain species of wood, implies the need for applying a protecting treatment to increase its life in service. Because of this, a knowledge of the permeability properties of the wood is desired. In this work, a simple and reliable method to evaluate the wood permeability is presented. For that, we have been used fast grown species, with low natural durability, Poplar clones and Pinus spp. The depth of penetration of water as a carrier of active ingredients has been evaluated using two dipping periods. The obtained results show that the method used is adequated for the wood treatability, because allows to quantify by means of the penetration of the preservative the degree of permeability of the studied wood species.

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