Treat the walls before wallpapering wallpapercertainly. The service life of the wall covering directly depends on how correctly the preparatory work was carried out. The treatment of walls before wallpapering should be of high quality, and the main steps of this work consist of cleaning the surface of old wallpaper, its leveling, priming and puttying. 
The puttying procedure makes it possible to obtain whitecolor of the base, due to which it is possible to avoid translucent dark spots under the wallpaper. Wallpaper begins to glue only after the wall is completely dry. If you hurry and start working on a wet surface, the material will quickly warp and begin to fall off. This is because the water that is available in the glue has nowhere to go. The raw, non-dried building materials will not be able to absorb it, and then the wallpaper will get wet, become heavier and begin to slide off the plane. If you open doors and windows to dry the wet wallpaper, then the process of setting the adhesive against the wall surface and wallpaper is broken, and all materials will be hopelessly corrupted. Proper preparation of the walls will ensure high-quality work and will not allow you to return to cosmetic repairs for a long time. 
Removing paint from plastered walls.Another of the requirements that must be fulfilled is to remove lime, glue residues, old pieces of the base that remained after the old wallpaper was removed. The working surface must be solid and not have a friable layer on which scratches from metal objects remain. This layer will peel off under the weight of the sheets. Its presence will interfere with ensuring good adhesion of the canvas to the wall. The surface should not contain lime streaks, dirty places, rust. Therefore, it is recommended to putty before pasting. Plastering plasterboard walls before gluing protects the surface from damage. This material requires compulsory filling in two layers. There may be fungal and mildew stains on the wall. They must be neutralized, because a favorable environment for the development of microorganisms is formed under the coating layer, and the pasted wallpaper turns black after a while. To avoid such an outcome, the cleared and leveled wall is treated with a primer that contributes to antifungal protection. Putty is applied to the dried layer. consists of such stages as: 
Tools for puttying works.
For work you will need:
From materials to prepare for work, you need to purchase:
The first stage of wall preparation
First you need to remove excess furniture from the room andAll design items that will interfere or may deteriorate during construction work. All the remaining things covered with a plastic wrap or dense veils. Electrical outlets, lamps and plinth dismantle, so as not to interfere with the conduct of high-quality work. Electricity in the room is turned off, the curtains are removed. 
Old wallpaper removal scheme: a - a spatula, b - a drilling machine. After the approach to the workspace is free, the wallpaper is being dismantled. This is an obligatory stage in the work. If you leave them, the old layer can not stand and collapse with the new one because the bottom sheets absorb water from the adhesive composition, get wet and float, despite the fact that everything looks perfectly glued. To the old wallpaper well departed, they moistened with warm water, using a rag or foam rubber roller, and after several hours begin work on their elimination. If the wallpaper is glued qualitatively, then you can put a bucket of hot water in the room. It will soar, and increased humidity will help the wallpaper to move away from the surface. Remove them with ribbons, and especially well pasted pieces watered and cleaned with a notched or ordinary spatula. After the wallpaper is removed, remove nails, dowels, available in the wall, if they are not needed. Also, remove all cables and wires, which after fireworks are enclosed in special channels after fireworks. After all this work with the help of a level, the evenness of the wall is determined and it is determined whether it needs to be leveled. Back to contents</a>
Cleaning and leveling the walls
Scheme of plastering the wall along the lighthouses.Cleaning the walls before gluing the wallpaper with a spatula from the remains of lime, thick wallpaper paper, irregularities, create a hard surface on which the wallpaper will fit tightly. At this moment, they decide whether it will be necessary to plaster the surface, putty it, or everything is ready to work. They switch to putty if there are roughnesses or partitions are made of drywall. If the surface turns out to be uneven and the differences in it are not more than 2 cm, then it requires work related to leveling, which is carried out using a gypsum plaster mixture. It allows you to apply a sufficiently large layer. For proper operation, beacons are applied, which help to determine the required layer of plaster. Leveling the surface, work with two spatulas and check the work with a level. They cover up nail marks, cracks, dents and dents that can ruin the results of the work. After the work is completed, the applied layer must dry. After it is leveled with sandpaper and an antifungal primer is applied. It will increase water resistance and improve the condition of the walls. If they are even, but have stains, they are not plastered, but putty in a thin layer. After puttying, they are dried, smoothed with sandpaper and the room is removed from the white dust that covers the entire working area. The working surface is well swept with a dry wide brush from dust. After cleaning the room, you can start applying wallpaper.
