Interference filters as an enhancement tool for infrared thermography in humidity studies of building elements

In the present work, the utility of infrared thermography applied to the study of moisture in building materials or in buildings (including those cases in which the water content is very high) is shown. Moreover, an increase in the information content of the thermal image by the use of suitable interference filters is demonstrated. The use of such filters allows us to determine the kind of hydric process, In the present work, different examples are given illustrating the use of infrared thermography (with and without interference filters) when moisture movement is studied. (C) 1997 Elsevier Science B.V.