The interior wall needs painting. The exterior wall needs scraping, and the putty powder on the exterior wall can be scraped off directly, and sprayed with water once or twice for maintenance after drying. Scraping groove uses cement mortar and plain cement slurry.
wall scraping is to paint the mortar on the wall, and level it up and down with a straight bar before it is dried. It is not necessary to flatten it, but it is basically flat. At this time, the sand content of the mortar used is slightly higher than that of the mortar on the surface, in order to prevent shrinkage cracks from easily occurring after the wall absorbs water.
Extended information:
Precautions:
1. Before scraping putty, the base course should be treated, including the plastering wall, roof, columns, board joints, etc., and the position should be cleaned to avoid dust, sticky slurry, splashing foam, oil pollution, etc. from affecting the scraping effect of putty.
2. After mixing putty powder evenly, it can't be scraped immediately. First, you need to scrape putty thin on the base with a putty spatula, just scrape it flat, so you don't need to scrape it. Keep it flat and dry it for a day after scraping.
3. Scraping: The next day after the putty is scraped rough, a large area can be scraped. First, a thin layer can be scraped on the surface. When the surface is slightly solidified and still wet, it can continue to be scraped repeatedly with putty batch selection. It is required that the finished putty layer is free from scratches, bumps, potholes, bottoms and air holes, and the surface should be kept smooth and clean.
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