The phenomenon of moisture (humidity), witch affects the buildings or infrastructure resources, the landscape, and the human health, is considering the main cause of deterioration of these resources in any country. In Santiago of Cuba, the oriental province of this island, this problem is associated, in general, to the effects of the government to conserve the national historical centre of the island. For that reason, Cuba and specially, the its western province, Santiago and its historical

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... re, does not escape to the factors that cause this situation. The zone of the area is, fundamentally, residential and at the same time, with a high tourist value due to the inherited architectural patrimony given by the colonial ancestor. In this study, we will discuss and face several environmental factors that have a direct relationship with this problematic. In addition, this study has a huge valorization and benefits to the urban planning program. The study will produce too, a great amount of good quality information and data (knowledge), that cam be use to performance the public policy to conserve the historical colonial buildings and the urban heritage area.