In situ assessment of superficial moisture condition in façades of historic building using non-destructive techniques
Fecha
2019-02-12Autor
Ruiz Valero, Letzai
Flores Sasso, Virginia
Prieto Vicioso, Esteban
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In historic building the water resistance capacity of their external materials is a relevant
property that must be known, because the materials play a fundamental role in the
interaction with the external environment. The aim of this research is to evaluate in situ the
superficial moisture condition in facades using non-destructive techniques (NDT). Two
different moisture measuring NDT was used: Infrared Thermography (IRT) and Electrical
Resistance Measuring (ERM); in addition, the Air Temperature and Relative Humidity were
measured. The IRT identifies the temperature of the material and offers a thermal image
with different temperatures that is interpreted as moisture area. A Moisture Mapping is
obtained with ERM, which represents the moisture conditions in the facades. Both
techniques give an idea of moisture areas. The results of both graphics shows that the most
humid areas correspond to the same areas that obtain by IRT and ERM. In conclusion, using
these two NDT at the same time it is possible to acquire usually a quick, qualitative, precise
and economic results of: moisture areas in situ, important data to survey and the
assessment the historic building for monitoring or preservation project.
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