How to deal with the wall before scraping putty?

Is it reliable to scrape putty with a long trowel? Reliable. When scraping putty with a trowel, it should be scraped clockwise from top to bottom, and the interface should be uniform, so that the putty will be better polished after drying. If the wall is uneven, it should be leveled first, and there should be no obvious scratches. When scraping putty, you should not scrape it too thick. You should wait until it is completely dry for the first time before scraping it for the second time or smoothing it.

Acceptance wall

Before scraping putty, check and accept the wall surface of the house to see whether the wall surface is firm, whether the surface is smooth, and whether there are uneven or cracks in different degrees. If the above situation occurs, feedback should be given to the developer or the property in time for rectification and maintenance, so as to avoid quality problems in the later construction.

Clean the wall

If there is no problem after the wall inspection, it is necessary to clean the grass-roots level and clean the dust and debris on the wall with cleaning tools to ensure that the wall is clean and tidy. After that, apply interfacial agent on the wall, pay attention to the uniform thickness, and naturally dry for about two to three hours. The purpose of brushing interface agent is to close the wall surface and avoid the phenomenon that putty is not sticky due to wall surface problems.

Increase wettability

If the interface agent is not painted on the wall surface and the construction time is in summer, then the wall should be painted with clear water to increase the wettability of the wall base and avoid the problem that the putty cracks due to excessive water absorption during painting. If it is a newly constructed cement wall, it needs to be cured for a period of time before it can be putty, otherwise there will be problems.

Wall treatment of old houses

If the old house wall is decorated, the wall skin should be removed first, because the old house wall has a long service life and the wall will be moldy and cracked, so the wall skin must be removed before scraping.