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Siemiński W. , Brachaczek W.

Materiały Budowlane

2013

tom nr 6

52--56

The article concerns the subject of effectiveness of refinishing plaster. Complex damp-proofing in already existing buildings is one of the most difficult and expensive actions. Such works are connected with interference with the building substance, therefore they are accompanied by noise and dirt, which makes them bothersome, especially when they take place in inhabited buildings. There are situations, when complex damp-proofing is impossible due to technical or economical reasons. In such cases there is the need to partly renovate the building by using only refinishing plaster. The evaluation of effectiveness of efinishing plaster functioning in such situations is the subject of this paper. 7 buildings have been selected for analysis. 2 objects were fully renovated, 2 – partially, and in the case of the remaining ones only refinishing plaster was applied. The results showed that in the beginning the level of moisture content did not vary from the one set for the walls of buildings in which complex renovation took place. Functionality of refinishing plaster on the walls which were partially renovated will only be effective in the beginning. However, as soon as the pores of refinishing plaster are filled with crystallizing salts, the layer will lose its hydrophobic properties and it will no longer constitute an effective solution against aggressive action of salt.