Wallpaper in a room is changed when it is already morallyare outdated or the paint on them has faded, or it's simply time to renovate the apartment. Do you need to remove old wallpaper before gluing new ones? Those who have tried to remove conscientiously pasted canvases know that this is not a five-minute job. And if you don't have the strength, time and desire to mess around, then is it possible to leave the old ones on the wall and stick new ones on top?
Wallpaper pasting scheme. The answer to the question of whether it is possible to paste wallpaper on wallpaper depends on the following factors:
- type of planned repair: cosmetic or capital;
- The kind of glue with which the previous ones were glued;
- quality of the previous coating.
If you plan to overhaul
If a full-scale overhaul is plannedrepair, then the experts' opinion is unambiguous: the old coating must be removed at any cost. The main reason for such categoricalness is that any wallpaper glue is water-soluble. Moisture, getting on old wallpaper, will soak it and reduce the strength between it and the wall, the canvas will bubble. After drying, it can smooth out, but it is impossible to predict in advance whether this will happen or not. Therefore, it is better not to take risks, but to prepare the surface before gluing in an ideal way.
Wallpapering tools.To remove the old coating, you can use a grinding machine. You can also wet the walls with a soap solution, and after a while remove the soaked paper with a spatula. After this, you must carefully putty and cover the surface of the walls with a primer. There is another way to remove firmly glued old wallpaper. For this, you will need a special device - a needle roller. With its help, perforation is applied to the walls. Then they are moistened with water. Moisture, getting into the holes, soaks the base of the decorative coating, and then it is easy to remove it with a spatula. Applying perforation requires caution so as not to damage the outer layer of plaster. Return to the table of contents</a>
At cosmetic repair
In some cases, the question of whether it is possible to gluewallpaper on wallpaper, answer positively. If you plan to quickly update the room, you can sometimes take a risk. This method saves time, and does not require sealing cracks and other surface defects. This is also acceptable if the plaster is removed along with the old wallpaper, and then more time and labor will be required than planned. Or if the old ones were glued with PVA glue. They are difficult to remove, because PVA glue does not soak in water, only the top layer of the old finish is removed, and the base remains glued to the wall.
Calculation scheme for the area of the room for gluingwallpaper. When asked whether it is possible to glue wallpaper over wallpaper, professionals also answer in the affirmative, if it is unknown what the old coating was glued with. If it is firmly attached to the wall, then you need to generously soak the walls with primer. After that, the old coating will adhere to the plaster even better, and the new one will lay down perfectly and will hold firmly. Sometimes old wallpaper is glued conscientiously, but in some places there are defects: creases, air bubbles, pieces of crumbling plaster. In this case, you can try to remove the old coating in problem areas, then level the surface with finishing putty, prime it and only then glue new sheets. You cannot glue wallpaper on an old coating with a convex texture - they will not hold, because the glue will contact the material only in certain areas. It is best if the old coating is smooth paper. Then you can quite count on a good result. It is very important to adhere to the following rules:
- Use high quality glue that will promote high adhesion of finishing materials;
- Over the old one you can glue wallpaper only light and with similar characteristics (paper to paper);
- All installation operations must be carried out very quickly, so that the substrate does not have time to deoxidize;
- New cloths should be placed with a shift relatively old.
If you decide to glue wallpaper over old ones,you need to stick a small piece of new ones on top of the old ones and let them dry. After that, the flaws will become visible. For example, if the old drawing will be visible, as well as other surprises. Then you won’t have to remove what you just pasted and re-paper the entire room, wasting your nerves, time and money.
