Wood as support has been, after the shelter wall of the first settlers, one of the most used materials from antiquity and one of the largest travel throughout history, reaching the present day use in the development of art objects. Being an undisputed material nobility is, however, subject to great instability caused by the influence of different environmental agents. In support of art work that is part of a vast cultural legacy, is subject to the inexorable laws of nature: aging and transformation (disappearance). Thus, the mechanism that generates the acceleration of aging is in living conditions, ie, in the environment in which the art object is located. Preventive conservation looks ahead to the deterioration of these factors may cause, studying their characteristics, the object, the interaction between them and always taking into account the optimization of available resources. The adoption of measures within our power to minimize the occurrence of any of these factors can be very important for conservation. Except in the case of large museums or institutions, it is not necessary to implement major infrastructure or have huge budgets to achieve. The purpose of this book is none other than to provide the user with a compiled from various sources material that will serve as a starting point for a first analysis of the situation of the entrusted assets and access to a broader and more detailed information if necessary. Given these considerations and taking into account the enormous possibilities offered by current means for immediate consultation, this publication may be considered a little guidance in this guide long way yet to go.