Optimization of a wall base ventilation system to control rising damp ventilation with outside or inside air?

• Type: Article in International Conference Proceedings Book
• Date: 2013

Authors

Vasco Peixoto De Freitas (Author) FEUP; Ana Sofia Guimarães (Author) FEUP; J.M.P.Q. Delgado (Author) FEUP

Conference proceedings International

Title: CONTRIBUTIONS TO BUILDING PHYSICS

Pages: 507-512

2nd Central European Symposium on Building Physics

Vienna Univ Technol, Vienna, AUSTRIA, SEP 09-11, 2013

Indexing

ISI Web of Knowledge - 0 Citations

Other information

Authenticus ID: P-00N-DXF

Abstract (EN): Treating rising damp in the buildings walls is a very complex procedure. Moisture transfer in the walls in direct contact with the ground leads to the migration of soluble salts, which are responsible for many building pathologies. The traditional techniques currently used to minimise rising damp are, in most cases, slight effective or too expensive, especially when dealing with walls of considerable thickness and/or heterogeneous materials like the historical ones. The Building Physics Laboratory (LFC-FEUP) developed a new simple technique called the hygro-regulated wall base ventilation system to avoid rising damp in buildings walls, especially for the case of historic buildings. The analytical model used and the laboratory and numerical results obtained well describe the observed features of rising damp in walls, verified by in-field tests, who contributed for a simple sizing of the wall base ventilation system to be implemented in historical buildings This work presents the "in situ" results of the rising damp treatment conducted, over two years, in a historic church, located in the northern of Portugal. The main purpose is to optimize the system and evaluate the better solution, for a particular climate condition. The results, registered over two years, clearly reveal the best ventilations periods, some condensation occurrences inside the system and indicate that the best solutions must correspond to admit outside air during summer periods and inside air during winter periods

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 6