Foundation treatment: Putty scraping has different requirements for different walls. For example, common concrete walls will have some air holes and bulges, so it is necessary to smooth the walls, smooth the bulges and fill the depressions. If it is a precast concrete wall, there will be some gravel and bumps on the surface. At this time, professional construction personnel need to brush the whole wall with a wire brush.
Basic repair: after the basic treatment, there will still be some depressions in the wall, which can be filled with gypsum putty at this time. Press the gypsum putty into the depression, and then level the erection to ensure the smoothness of the wall.
Brush caustic soda solution on the wall: there may be oil stains on the wall, so it is necessary to brush caustic soda solution, but you must pay attention when brushing. While brushing, cleaning the wall with clean water is not only faster, but also effective.
Extended data:
Matters needing attention in putty scraping construction:
1. Before putty scraping construction, it is necessary to measure whether the wall surface is flat with a ruler to determine the way of putty scraping. Generally, the putty can be scraped twice, which not only makes the wall more flat, but also covers the background color. If the wall is uneven, the putty should be scraped several times for leveling, but the construction interval of putty should be two or three hours each time to ensure that the wall is fully dry.
2. If water-resistant putty is used, the coating should not be too thick, otherwise the wall will crack easily when it is dry. If the wall is uneven, plaster can be used to repair it first, and then putty construction can be carried out.
3. Before the putty is wet, the indoor floor should not be cleaned to avoid dust pollution on the wall putty.
4, blow be bored with child should be properly protected after the completion of the metope, shall not knock against pollution of metope.
5. After the putty scraping is completed, the indoor air should be circulated to prevent the surface of putty from being dull or shiny after drying.
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