Problems in the construction of exterior paint for the renovation of old walls

China Paint Online News News
At present, China's building exterior wall decoration market appeared a lot of external wall decoration materials, tiles and mosaics are often used in the exterior wall paint, but in the long-term use of the process will be affected by external environmental factors, so the wall is also very vulnerable to pollution or fading problems, so it will be The renovation of the old wall will bring great obstacles, if these materials accidentally fall in the high sky will bring people a very serious safety risk, while mosaics and tiles will make the weight of the building itself greatly increased, and the use of architectural exterior paint can avoid these very serious problems, but also give the building a more brilliant color.
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Problems in the construction of old wall refurbishment using exterior paint
1, the old wall of the old wall renovation paint construction building, regardless of the material used, during the long period of oxidation and wind blowing In the sun will produce fading phenomenon, in the surface of the wall and the grass, the actual situation is more complex, so in the process of the old wall construction should also be based on the specific situation of the wall renovation construction, in the choice of exterior paint should also fully consider the specific situation of the wall.
1.1 grass-roots inspection and treatment. Grass-roots inspection in the old wall flour brush construction process must first of all on the wall of the grass and surface of a strict inspection, check the solidity of the wall grass, whether there is a soft phenomenon of the wall, whether there is smudges on the wall, but also to check whether the grass-roots damage phenomenon, to ensure that the wall in the construction of no quality problems. Before construction, the grass-roots must be in a relatively dry state, water content should be controlled at about 10%, painted paint in the PH value should be guaranteed within 9. The grass-roots treatment should first thoroughly clean up the floating ash and sand and peeling parts, followed by the timely treatment of the mortar or debris that has been glued to the wall, and the cleaning of those areas that have been drummed and peeled off. Third, if a part of the wall has been stained, this part of the original soil layer should be eradicated, if the eradication is still not a good performance, should be used to clean the wall special detergent for its effective treatment. Fourth, if the grass-roots and the situation of salt or alkali can be used 3% acid to clean, after treatment clean, but also with water to rinse it, of course, for some of the more stubborn stains can also be treated with some scrapers and straw brushes, so that clear powdery debris. The last point is that if some grass-roots has appeared loose and peeling phenomenon, we must first of all these already peeled places for effective treatment, and then the old wall renovation and construction, and for some of the iron has appeared rust marks to remove rust, but also to do a good job of rust treatment.
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Problems in the construction of old wall refurbishment using exterior paint
1.2, the process of coating construction process is: old wall cleaning→ coating grass treatment→ coating primer → roll or spray coating→coated paint→ finishing or repairing defects such as bristles and holes. After the grass-roots treatment construction, but also to the wall has been repaired parts of a strict inspection, mainly to see whether the water content of its mortar and alkaline and the main part of the project is consistent, if there is a very obvious difference between the two, it should be timely treatment, but also the quality of other parts of the paint to carry out a strict inspection, so as to better ensure the quality of construction. Pay attention to the construction temperature when construction. In winter, the construction temperature should be above 5 degrees C, if the coating film will be affected when less than 5 degrees C, resulting in poor adhesion of the paint film; Need to emphasize that the construction staff do not in order to save costs, unlimited water dilution paint, in fact, if the paint dilution excessive, will cause the paint's matching ratio imbalance, after construction will produce coating film is too thin, poor adhesion and other quality problems, after not long will be de-powdering, causing unnecessary losses to consumers.
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