How to restore a partially damaged façade?

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    Thermal fluctuations, erosion from atmospheric agents, and the application of products with poor mechanical properties on facades promote the appearance of cracks in the plaster, more or less deep, which become the easiest ground for mold attack and the penetration of water and aggressive substances. This situation, in the long run, leads to the disintegration of materials and consequently to the decrease in the insulating power of the wall, with also severe damage to the masonry and therefore to the safety of the entire building. The chemical composition of the Paulin Line features highly elastic and waterproof elastomeric resins that effectively solve these problems, restoring the damaged parts with an impeccable covering effect and restoring stability and aesthetic value to the support. CLASSIFICATION OF CRACKS ACCORDING TO EN 1062-7:2004 STANDARD (E) Cavitation Class A1 < 100 μm (0.10mm): These are very fine cracks that are difficult to see because they only affect the top layer of plaster. Sometimes they can only be noticed by wetting the surface and almost always appear as a very fine spider web. Cavitation Class A2 < 250 μm (0.25mm): They become visible when a wet wall starts to dry. In cracks, water has penetrated deeper and therefore takes longer to dry. The cracks appear in a reticulated pattern and are generally very fine. This reticulum is usually about 20 cm in size and affects the outer part of the plaster more than the inner part. This is generally caused by poor packaging or inadequate application of plaster. Cavitation Class A3 < 500 μm (0.50mm): They typically affect the plaster or the superficial layer of concrete. They are caused by shrinkage during the setting phase and can be as deep as 3 to 15 mm. Cavitation Class A4 < 1250 μm (1.25mm): These are significant cracks that can have linear paths and often also affect the structure. They promote the entry of rainwater. Cavitation Class A5 < 2500 μm (2.5mm): They typically affect the structure and are caused by different expansions between various building materials or structural settlements. Before intervening, make sure that the phenomenon is stabilized and that the causes have been resolved.


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