Contradiction of Methodical and Technological Points of Views on Moisture Fighting Technologies On Walls of Architectural Heritage Buildings

The moisture affects all materials on the earth surface, but we have developed a specific sensitivity toward moistening of architectural heritage buildings. Water in construction materials and on their surface influences partially their technical state like their stability, but usually not that much as people can think. Unwanted moisture is usually dangerous at very soft construction materials, like clay bricks. But especially the water soluble salts, the water transports through the masonry, can act as a very dangerous destructive material, influencing destructively especially surface plasters. And in the case of historical wall paintings are the losses on cultural heritage invaluable. To deal with moisture effectively we can use some specific technologies, but the most effective ones have a specific destructive influence on the historical construction material. And this is the point of conflict between technical and methodical points of view. So the basic scientific questions in this field can be such ones: are the destructive technologies for fighting moisture in historic masonry really effective? And are they to be accepted also methodically?