Humidade Ascensional. Dimensionamento de Sistemas de Ventilação da Base das Paredes

Abstract

Moisture is one of the main causes of buildings' walls degradation, in particular the so-called rising damp. The water coming from the ground migrates through porous materials, through capillarity, leading to the appearance of many pathologies, until the saturated walls, are unable to fulfil the require waterproofing functions, protection and finishing. In the last few years a wall base ventilation technique was developed, in the Building Physics Laboratory - L. F. C. at the Faculdade de Engenharia da Universidade do Porto - F. E. U. P.. After the development of the technique, new studies were conducted to create a design programme, named "HUMIVENT", which has been lately tested for its future use in the process and design of treatment solutions. The central aim of this project is the analysis of the "HUMIVENT" programme, the design model application and evaluation through buildings, performing a sensitivity study of the involved parameters. KEY WORDS: Rising Damp, Walls Base Ventilation, HUMIVENT, Historical Buildings, Design.