ENGLISH
REPLACEMENT OF CONTAMINATED PLASTERS
ENGLISH
1. Removal of contaminated plaster up to the highest point reached by rising damp.
2. Accurate cleaning of masonry, also considering washing using a pressure washer.
3. Cladding, where needed, of masonry surfaces using materials that are compatible with the specific composition of the wall.
4. Application of a first layer of salt resistant pozzolan plaster, 1 cm of thickness, fully covering the wall surface( up to the floor). The salt neutraliser must be mortar made of natural hydraulic lime, pozzolan hydraulic binders, marble dust, silica sand, natural air entraining agents. This compound, which must guarantee secure grip to the surfaces to be treated, will create a barrier for the salts inside the masonry( sulphates, chlorides, nitrates). Proper use of a salt resistant plaster with these features will not need preliminary sulphate and nitrate fighting treatments.
5. Application of a lime-based renovating plaster( in case of humid masonry) or a lime-based plaster( on a dry or semi-dry wall). It is good to avoid contact between the new plaster with the floor( therefore it should be placed some centimetres above) to prevent any absorption. 6. Application of a lime finish. 7. Painting using limewash or silicate paint for internal walls. 8. Protective coating with silicate or siloxane paint for external walls.
9. Application of baseboard, if any, using silicone or proper glue: do not use metal nails( they are not compatible with masonry materials for rehabilitation purposes).
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