The wall is flat, but when you rub it with your hands, it feels like powder, and your fingers are all white ash. I want to paste wallpaper. Has anyone pasted wallpaper on this wall? Should I draw it? But it's too expensive to paint latex paint and paste wallpaper. How about a layer of blue paint? Hello, everyone, the wall of my house was painted with many layers of paint. . Can I just scrape the wall and paste the wallpaper with glue without brushing anything? Will the outermost layer of the wall be torn down soon? I am a professional manufacturer of Ouya wallpaper. I hope my answer can help you. 1. First of all, your present situation belongs to a whitewashed wall. One of the treatment methods is to polish with fine sandpaper and brush with varnish. Another way is to brush a layer of basement membrane directly on the existing basis, and then you can paste wallpaper. Whether to brush varnish or basement membrane depends on the wallpaper material you choose. Let me introduce you to the functions, advantages and disadvantages of varnish and basement membrane, and see what primer you choose. But be sure to brush it for your long-term residence and avoid hidden dangers. 2, the benefits of varnish and basement membrane: mildew and moisture, easy to replace in the future, protect the wall and increase the adhesion of wallpaper; 3. The basement membrane protects the wall surface from being damaged when the wallpaper is replaced next time, and prevents some dirty air and moisture from appearing on the newly treated wall surface, which is convenient for replacing the wallpaper in the future, easy to tear off and more environmentally friendly. It is a substitute product of varnish and can be directly coated on latex paint. 4, the difference between varnish and basement membrane: varnish, the disadvantage is not environmentally friendly, oily, slow drying, the advantage is that the solidified wall is good, and the wall protection is good. The advantages of basement membrane are: 1, protecting the wall; 2, mildew and humidity; 3, convenient wallpaper replacement; 4. Environmental protection. 5. If the wallpaper you choose is paper or non-woven, and the color is relatively light, it is recommended to brush the basement membrane, because the varnish is yellow, which may damage the substrate. 6. Modern wallpaper is dry and sticky. If it is soaked, the wallpaper is old-fashioned and has many shortcomings. Not recommended. Supplement: If your previous house was painted with many layers of paint, it's best not to paste wallpaper directly, because wallpaper will peel off the paint layer on your surface because of its wall peeling characteristics. In this case, even if the basement membrane or varnish is brushed, this hidden danger cannot be solved. If the old house has been rebuilt for more than three years, the wall must be reprocessed, otherwise the wallpaper will become warped and sometimes fall off in a large area. If you must paste it, according to your current situation, you must shovel off the surface layer, reapply putty, and brush varnish or basement membrane before you can paste the wallpaper. Questioner's testimony: Thank you for 20 10-06-0 1 other answers (4) 4. The premise for SOSO users to paste wallpaper is 20 10-05-29, that is, your wall is smooth enough without unevenness, so that the effect of your wallpaper paste will be good. If your wall is relatively flat now, you can sand it directly, and then apply varnish and wallpaper. Xiao -drakan 10 Grade 20 10-05-29 You have a putty wall. As long as the wall is smooth and flat, you can paste wallpaper without potholes. You don't need to paint or shovel putty. It is recommended to brush the wall with basement membrane once at most twice to protect the wall from moisture. After drying, gently polish it with sandpaper. Never brush more oil, it will cause the wall to be too smooth, so that the wallpaper will not stick firmly, and it will shrink and produce joints when it is dry. And clear oil is not as environmentally friendly as basement membrane ... Question: What is basement membrane? You mean to brush the basement membrane first, dry it and then polish it with sandpaper, so you can paste it, right? Can I post it directly now? No need to brush or wipe, okay? Answer: It is better to use basement membrane. If you stick it directly, the adhesion is very strong, which may pull off the wall base. If you brush a layer of basement membrane (also called wallpaper companion) first, the basement membrane can close the wall, be waterproof and moisture-proof, and increase the adhesion between the wall and wallpaper. It's no problem to paste wallpaper after painting. The basement membrane can also protect wallpaper from yellowing, mildew and alkali.