Conservation of buildings in areas at seismic risk must take prevention into account. The safeguard
architectonic heritage is an ambitious objective, but a priority for planning programmes at varying levels of
decision making. Preservation and restoration activities must be optimized to cover a vast and widespread
historical and architectonic heritage present in many countries.
Masonry buildings requires an adequate level of knowledge based on the importance of structural geometry,
which may include the damage, details of construction and properties of materials. For identification and
classification of masonry is necessary to find shape, type and size of the elements, texture, size of mortar
joints, assemblage. The recognition can be done through a visual inspection of the surface of walls, which
can be examined, where is not visible, removing a layer of plaster.
Thermography is an excellent tool for a fast survey and collection of vital information for this purpose, but it
is extremely important define a precise procedure in the development of more efficient monitoring tools.
Thermography is a non-destructive method that allows recognizing the structural damage below plaster,
detecting the presence of discontinuity in masonry, for added storeys, cavity, filled openings, and repairs.
Furthermore, the fast identification of subsurface state allows to select areas where other methods either
more penetrating or partially destructive have to be applied.
The paper reports experimental results achieved in the mainframe of the European project RECES
Modiquus. The main aim of the project is to improve methods, techniques and instruments for facing antiseismic
options. Both passive and active thermographic techniques have been applied in different weather
conditions and time schemes. A dedicated algorithm has been developed to enhance the visibility of wall