Sticking wallpaper is also a big deal. It’s good to do well, not doing well, it’s really good.
1, the old wallpaper should be shovel
Except if the original wall is covered with wallpaper, how to deal with it? Can you put a new wallpaper directly on the original wallpaper? The decoration expert said that this must be treated separately according to the situation. Generally speaking, since the original substrate is not necessarily dense, it may cause the wallpaper to fall off after being pasted. There is a big risk in laying the wallpaper directly on the original wallpaper. It is necessary to eradicate the original wallpaper and use the above. The method of detecting the coating substrate is to inspect the substrate to see if it is necessary to further remove the putty layer, and the subsequent work is consistent with the "pre-test of the old house paint."
2, gypsum base pay attention to crack prevention
If the base of the original wall is a gypsum board, you need to pay attention to moisture protection. The first step is to place all the self-tapping screws on the anti-rust paint to prevent the rust from corroding the wallpaper; then the joints of the gypsum board are filled with white latex and gypsum powder to prevent the gypsum from shrinking. Experts emphasize that gypsum powder is used instead of putty because gypsum powder and gypsum belong to the same material, and the expansion and contraction coefficient are the same. If putty is used, the shrinkage coefficient will be different, which will also cause cracking.
3, wooden base to prevent deformation
What should I do if I need to lay a wallpaper on a wooden board? First, I need to apply a thin layer of paint to the wooden board to prevent the wood from being deformed by moisture. In the case of gaps, the joints are replaced by putty instead of gypsum powder. "Because the hardness of the ash is high and the stability is strong, there is no problem of shrinkage expansion." The next step is to brush the putty. Put the putty in a ratio of 1:1 with white latex and water, and apply a thin layer. "To be as thin as paper, in fact, it is a function to fill the unevenness of the wooden board." The putty layer also needs to be able to stick to the wooden board. If it is not strong, it will easily lead to the wallpaper falling off.
4, the substrate needs to meet 7 requirements
If you want to lay wallpaper, you generally need to meet the following seven criteria: 1. Flat. You can use a 2 meter long ruler, or use a flashlight to illuminate the wall and look at the light, if there is no obvious unevenness. 2. Have a certain carrying capacity. Here, you can put a putty on your fingernails, if you can't draw it down, or use a sticker to stick it on the putty layer. If you remove the tape without scraping the putty, it means that the putty has a certain load-bearing capacity and is qualified. 3. Water absorption is reasonable. Splashing water on the wall, if the wall becomes wet, between pouring water onto the glass and pouring it into the sponge and sucking in, it means. 4. The pH is neutral. Use PH test paper and present it as neutral. 5. The surface should be clean and the color should be consistent. 6. Smooth. There are different requirements for smooth, different wallpaper products, but need to meet the requirements of various wallpapers. 7. Dry. In general, the moisture content of wooden boards should not exceed 8%, and the moisture content of the wall should not exceed 12%.
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