Exterior wall construction steps Grass-roots treatment: first remove the grass-roots surface dust and other adhesives.

First, the outer wall coating construction steps
A. grass-roots treatment: first remove the grass-roots surface dust and other adhesives. Larger depressions are flattened with polymer cement mortar. And wait for it to dry, smaller holes, cracks with cement latex putty

. Wall pan-alkali frosting with zinc sulfate solution or thin hydrochloric acid solution brush, oil with detergent cleaning, and finally washed with clean water. The original coating of the grass roots should be treated differently depending on the situation: loose, shelling, brittle old coating should be eliminated;
B. Brush substrate (except wood and paint surface): If the wall is loose, strong absorption, can be cleaned on the grass with rollers evenly painted one or two times glue bottoming (acrylic emulsion or water-soluble building glue plus 3 to 5 times water dilution), can not leak, can not be painted too much to cause flow or accumulation.
C. local make-up putty: the grass-roots bottom drying, with putty to find the uneven place, dry sand flat. The finished putty should be stirred well before use, and the putty can be adjusted with water at its discretion when it is thick.
D. Full of putty: Place the putty on the tray and scrape it with a smear or like a scraper, up and down. According to the grass-roots situation and decoration requirements scrape 2 to 3 times putty, each time putty can not be too thick. Putty dry should be timely sandpaper polishing, not to grind out the wave shape, can not leave abrasive marks, after grinding to sweep away the ash.
E. Brush bottom coating: the bottom coating stirred evenly, such as thick paint, can be diluted according to the requirements of the product description. Brush evenly with a roller brush or row brush, be careful not to leak the brush, and do not brush too thick. After the bottom coating is dry, if necessary, the putty can be partially replenished, and the sand level after drying.. F. Brush coating: Dilute the surface coating according to the proportion required by the product description and stir it well. When the wall needs to be colored, the color split line is ejected with a powder line bag or ink bucket, leaving room for 1 to 2 cm in the cross-color area when painting. One person first paints the paint evenly with a roller brush, and the other then flattens the coating marks and splashes with a brush. Bottoming and falling should be prevented. Each brush face should be brushed to the other side from the edge and should be done once to avoid scratches. After the first drying, apply the paint a second time. Generally brush 2 to 3 times the paint, depending on the situation.
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