Correct.
Before plastering, corner guards should be provided on the exterior corners of indoor walls, columns and door and window openings. Because these places are most susceptible to damage due to collision, they have special requirements for strength, such as When there are no regulations in the design, you can use: 2 cement mortar to make dark corner guards, with a height of not less than 2m and a width of not less than 50mm on each side. The method is to plaster according to the thickness of the ash cake, then glue the eight-shaped ruler and find a square to hang it straight. Use 1:2 cement mortar to smooth it in layers. After the mortar is slightly dry, use cement mortar and make small fillets. There should be three layers of plastering on the interior wall. The bottom layer should be lower than the punching ribs. After the mortar punching ribs are slightly dry, a middle layer of plaster should be added. If you wait for the punching ribs to dry before applying the middle layer, the punching ribs will be higher due to the shrinkage of the wall mortar. For the wall surface, the middle layer should be flattened with punching ribs, and a wooden scraper should be used to lean against the punching ribs on both sides, scrape it from bottom to top, and then smooth it with a wooden trowel. After the middle layer is 50% to 60% dry, perform overlay calendering. After calendering, to make the wall smooth and clean, you can use a brush dipped in water to brush it in the same direction.