How to process the walls before wallpapering - a comparison of options. Preparing walls for wallpapering How to treat concrete walls before wallpapering

Many people pay great attention to the process of choosing wallpaper itself, while not attaching importance to competent surface preparation before pasting them. And absolutely in vain. Preparing the walls for pasting is an extremely important procedure, on which the success of the venture depends entirely. And if it is carried out illiterately or skip this stage altogether, then the new decorative coating, even if they paid a lot of money for it, will have a very unsightly appearance. Or it will not stick to the wall at all, which, in principle, is even worse. Be that as it may, the preparation procedure must be carried out very carefully. What, in fact, we want to tell those who do not know what needs to be done before wallpapering, how to process the walls and why do it at all.

What should be the surface under the wallpaper

So, what preparatory work needs to be carried out so that the updated decor of the room not only pleases with its appearance, but also stays on the wall with high quality for a long time? In order to correctly understand the essence of the issue and correctly determine the scope and type finishing works, you need to start from the opposite. That is, to know what the ideal surface for wallpaper should be.

And first of all, it must be dry. A wet surface will poorly absorb the water contained in the adhesive, and therefore the composition will not set properly on the wall and will not provide the desired quality of adhesion of the surface to the decorative coating.

The foundation must be solid. That is, the presence of flaky surfaces on the wall, areas of plaster literally breathing at hand, old wallpaper hanging in shreds and other unnecessary elements is a direct contraindication to pasting. First, the base coat must, as they say, be brought to mind, and only then proceed to the pasting procedure.

The surface must be clean. If there are black stains from mold and fungus on it, the question of whether it is necessary to process the walls before wallpapering is generally pointless to ask. Here we are not even talking about how the new coating will look on such a wall, but about how you will feel in the near future, because the dampness in the room negatively affects not only the condition of the wallpaper, but also your health .

The wall should be smooth and have a uniform color. Only then will all possible and impossible defects not appear on the new decorative coating, which will cause not joy from the work done, but bewilderment and annoyance.

What is ideal wall preparation

Far from always, home masters carry out thorough preparation. Moreover, quite often it is not at all because they do not know how to process the walls before wallpapering, but for the reason that this procedure itself is quite lengthy and expensive. Indeed, ideally, the walls should be removed from the old coating, then the base should be antiseptically treated, after which it should be carefully leveled with plaster, and then puttied, cleaned and primed. There is a lot of work, and a lot of expensive materials will be required. So the craftsmen go to all sorts of tricks, trying to skip one or another stage of preparation. Sometimes this can be done when the prerequisites are right (we will give some tricky tips on this at the end of the article), but most often it is still unwise to do so. In principle, of course, everyone decides for himself what he needs. One is also satisfied with the fact that already a month after the repair, the wallpaper hangs in the corners of the room and snarls angrily with parted seams, while the other begins almost a nervous attack at the sight of a small tubercle sticking out from under the wallpaper in a far from the most visible place in the room.

We, in turn, still allow ourselves to give a few recommendations and try to describe in as much detail and step by step as possible how to properly process the walls before wallpapering.

Stage One: General Preparation

How to treat concrete walls before wallpapering

Looks like the fungus is sorted out. And what to do if under the old wallpaper you suddenly found not a layer of plaster, but literally bare concrete? How to be in that case? Glue on such a base modern wallpaper by no means is it possible. In general, this can be understood at a glance. Such a wall has a very unsightly appearance, it is all rough, in defects and literally causes tears with its curvature. How to process the walls before wallpapering in this case? We answer - nothing! You just need to spit on the notorious savings and lost time and start plastering the surface. Which, in fact, is the second stage in the process of competently preparing the base for wallpaper.

Plastering

As for the process of plastering itself, there are two possible scenarios for the development of events. In the case of the concrete walls mentioned above (as well as those made of brick or made of silicate blocks), there is no alternative. You will have to plaster the entire surface, from corner to corner. Moreover, in the case of a large curvature, certainly with the installation of beacons. By the way, you will have to carry out exactly the same procedure if you have a plastered, but also very uneven surface. But if the wall does not cause any particular complaints, but only has small defects and the areas of curvature on it are relatively small, then it is quite possible to limit ourselves to resuscitation measures. That is, repair all existing defects and cracks with plaster, as well as trim some areas. After that, you need to wait for the solution to dry, and then prime the entire surface of the walls with an acrylic primer. After it dries, you can proceed to the last stage.

Puttying

The purpose of this procedure is to make the base base white and smooth. After that, you can glue any, even the most capricious wallpaper, without fear for the outcome of the case. As for the process itself, it will not cause special problems for those who know how to hold a spatula in their hands. Get a putty mixture, and not necessarily very expensive, knead it, apply a thin first layer on the walls, wait for it to dry. Then you clean it with sandpaper, prime it, then putty it again, clean it again and prime it. At the same time, it is not at all necessary that the surface be perfectly smooth, without a single scratch. Minor minor defects will hide under the wallpaper. The main thing is to make it smooth and durable. But to achieve the latter, a primer is applied. About her - a little more.

What primer to treat the walls before wallpapering

To some, the question may seem irrelevant. Primer - and primer. Bought - anointed - ready. But things are a little more complicated. The fact is that at the moment there are quite a lot of various compositions. And not all of them are suitable for wallpaper, as they have a special purpose. The primer is designed to give the surface such a quality as adhesion. That is, it should maximize the fit of the wallpaper, their adhesion to the wall. And for these purposes, it is best suited. It is generally considered universal, compatible with all types of surfaces, and it dries quickly enough. So when buying soil, do not be wiser. Buy acrylic - you definitely can't go wrong. The choice on the market is quite large, but the brands Ceresit, Snezhka and Master are the most popular.

And remember: after priming, the wall should dry well. And it is best not to rush and give her a day for this. And then you can proceed directly to the pasting process.

It is the observance of all the above rules and the implementation of the described procedures that will be the answer to the question of how to properly process the walls before wallpapering. This is the only way to get a really even and solid foundation. And the wallpaper glued to it will stick perfectly on the wall, delighting you. long years with its excellent appearance.

Secrets of the masters

Finally, a few tricks and useful tips. If you didn’t manage to achieve perfectly smooth walls, it doesn’t matter. The main thing is that you end up with a solid and well-crafted base. In this case, just do not buy plain or striped wallpapers - get something colorful, albeit with an unobtrusive, but pattern.

If you have no way to re-plaster and putty the walls, that is, you are forced to glue on what is, then in any case, first of all, carefully treat the surface with a primer. And preferably twice, with a break of several hours. And try to mask all the existing defects on the walls with wallpaper. And for pasting such problematic surfaces, get the most “chubby”, corrugated decorative coating, and best of all with an abstract pattern.

Conclusion

We tried to answer the question of how and why to process the walls before wallpapering as fully as possible. We hope that we not only managed to convince you of the need for this process, but we also managed to teach you how to do it competently.

Preparing the walls for wallpaper is a mandatory procedure that is carried out in advance and eliminates many problems in the future. Many believe that this event can be carried out partially or completely excluded from the finishing work, especially when using roll material. This is an erroneous opinion, because it is precisely the correctly performed preparation that is the key to obtaining a high-quality pasted surface.

Several decades ago, it was believed that preparing walls for wallpapering should be done only as a last resort. Pasting the walls with newspapers was widespread everywhere, due to which they tried to increase the adhesion of materials to each other. The lack of training at that time can be explained quite simply: there were no special products for such work on the construction market or it was very expensive. To date, the situation has changed radically, now there are many products for different stages of wall processing before wallpapering.

What is the purpose of wall preparation?

Improving the quality of gluing canvases to the surface. Walls, regardless of the material, have many pores. If they remain open, then numerous voids form under the applied coating, constituting up to 50% of the total area. This is clearly seen when dismantling old paper wallpaper- they are literally removed in stripes. And this means that at any moment they could simply fall off. Also, the lack of adhesion leads to the appearance of a divergence of the seams between the strips.
Obtaining even, without depressions and bulges, surfaces. Wallpapering various coatings, which do not always have the necessary evenness. But this finishing material is not a means of correcting wall defects. If you leave everything as it is, then any flaws will immediately be evident and the visual effect will be spoiled.
On a note! Some manufacturers claim that liquid wallpaper can hide many surface problems. In fact, they are only able to correct a slight difference in elevation. Similar property There are also vinyl varieties.
Exclusion of the occurrence of fungus and mold. This is an eternal problem for plastered walls, it can occur on any basis. The reasons for the appearance of microorganisms are cracks and crevices, as well as increased humidity in the room.

It is imperative to properly prepare the walls for wallpapering, otherwise the resulting decorative coating will quickly lose its original appearance.

Stages of preparation

Preparation is a complex of interrelated activities, each of which plays a specific role. All procedures are carried out in strict sequence.

So, before sticking wallpaper you need:

If there is an old decorative layer, completely remove it and clean the surface. Assess the general condition of the walls.
If the work is carried out on the old base, then the existing delaminations are removed, after which the sections are primed.
The surface is covered with plaster to correct significant irregularities. For small imperfections, puttying is performed.
One or two layers of primer are applied.

The main stages of wall preparation: 1 - cleaning from old finish; 2 - base primer; 3 - surface leveling

Preparing for pasting is a fairly simple event, but each stage has its own subtleties and features.

Removing the old layer

If the work is carried out in a habitable house or apartment, then the preparation begins with the sequential removal of the previously applied decorative layer. As a facing material, paint or wallpaper most often acts. The removal of each coating has its own characteristics.

Removing the paintwork

It should be understood that any paint needs to be completely removed, even a simple whitewash is washed off entirely.

Procedure:

Surface cleaning with a grinder

On a note! This is a rather time-consuming process, so you need to be patient.

Removing old wallpaper

How to prepare walls for wallpapering with a paper layer? Removing such an old coating is much easier. To work, you will need a spatula and a spray bottle with warm water.

The dismantling process is as follows:

Initially, you need to pry off the layer in some places, if there are voids, the material will be removed in layers.
The remaining areas are sprayed with water until completely wet.
Then, with a simple spatula, paper residues are removed with sharp movements from the bottom up or diagonally.

This principle of operation is suitable for all types of wallpaper, including liquid ones.

Surface condition assessment

Due to the fact that the subsequent steps depend on the correct assessment of the condition of the coating, this process is carried out with the utmost care. The wall is tapped over the entire area: if voids are found, then it is recommended to break them. In the presence of defects that make up more than 40% of the surface, the layer is removed completely, to the base. It is important to make sure that there is no mold or mildew.

In case of minor damage, the cracks are covered up, with a slight curvature, puttying is performed. If the defects are numerous and the old coating has been completely dismantled, the walls must be plastered and, if necessary, a finishing putty layer should be laid.

On a note! These activities take a significant amount of time, but they allow you to avoid further problems.

First priming

Preparation of walls for wallpapering includes two stages of priming. There are conditions that require the correct execution of this sequence.

The first layer is applied after the surface has been cleaned and all existing cracks have been patched. This process is necessary so that the composition for covering a few defects is firmly held.
When the plaster is completely removed, the base is covered with a primer in order to increase the adhesion of the newly applied coating. But it must be borne in mind that with this option, the second priming is carried out in two layers.
Be sure to wait until the surface is completely dry.

Often little attention is paid to this, but it will ensure the reliability of fixation.

Plastering with significant defects

Plaster is used to repair significant defects or create a starting coating for subsequent puttying.

Action algorithm:

The required amount of the mixture is prepared, the proportions and technology depend on the selected composition. Each manufacturer supplies its products with instructions.
Due to the fact that the solution serves to correct significant defects, beacons are pre-installed.
The mixture is thrown onto the wall with a spatula and leveled with a rule.
After drying, the beacons are removed, and the resulting traces are covered up.

The resulting coating can play the role of a base, but due to the roughness of the composition, only non-woven and vinyl material options are suitable for gluing.

Puttying with small imperfections

Puttying is considered a mandatory procedure, but in reality, it is advisable to carry out this event to correct minor flaws or distortions. If the old coating has only small cracks, then it will be enough to cover them up.

The putty is applied as follows:

The putty composition is mixed. It is important to consider that it dries out rather quickly, so it is recommended to cook it for 30-40 minutes of work.
With a wide spatula, the solution is applied to the surface and distributed over the base with uniform movements.
There is no need to rub the coating, so only the initial alignment is performed.

Preparing the walls for wallpapering with your own hands is considered almost complete. The final step will be priming, which is done after the surface has completely dried.

Working with different wall materials

When performing finishing work, it must be borne in mind that the walls may have various surfaces, each of which has its own characteristics.

concrete foundations

How to properly prepare a concrete wall for wallpapering? It must be remembered that this process is considered the most laborious.

The surface is cleaned from dust and dirt. A layer of deep penetration primer is applied. If it is absorbed quickly enough, it is recommended to repeat the process.
A plaster mortar is being prepared, it will serve as a starter. The mixture should be applied in compliance with all procedures.
If a rough composition was used for work, it is recommended to cover the surface with putty.
On a note! Many masters note that in order to obtain desired result the plastered coating must be carefully sanded.
Priming completes the process, it is important to apply at least two coats.

The preparation of concrete walls for wallpapering is considered complete.

Plastered coatings

To begin with, the coverage is evaluated, further actions are determined by its condition:

If the surface after cleaning has sufficient evenness, but there are small gaps, then you need to expand the cracks and cover them with putty, and then prime them.
If there are small gaps on the coating, but there are noticeable curvatures in height, then the work consists in lining with putty. It will level the base and correct minor defects. The result is fixed with the help of soil.
The most time-consuming is the option in which the coating has numerous defects. This means the complete removal of the plastered layer and the application of a new one.

On a note! In new buildings, finishing is carried out according to the principle of "screed and plaster", therefore, in such premises it is advisable to check the quality of the work performed. There are situations when everything is done wrong, this involves a complete reconstruction.

Plasterboard surfaces

Deciding how to properly prepare plasterboard walls for wallpapering, it is required to evaluate the fixing of the GCR boards. If installation work were carried out according to all the rules, then further manipulations are performed according to the following scheme:

Thus, the surface is completely prepared. Finishing work can be done after the walls have dried.

Processing the walls before wallpapering is a very important stage, without which you can not do. The service life of the new wallpaper depends on how correctly and efficiently all stages of the preparatory work were done. Surfaces must be treated carefully, without missing anything. There are four main preparatory stages - cleaning the wall from the old coating, leveling, priming and puttying.

Stages of preparatory work

One of the conditions necessary for high-quality wallpapering is a complete preliminary cleaning of the surface from lime, glue residues and small pieces of wallpaper that could not be removed during the removal of the coating. The final surface should be hard enough to avoid dents and scratches from metal tools. If this layer is left loose, it will not withstand the weight of the coating over time and will peel off. The stronger the surface of the wall, the better the adhesion to the wallpaper will be.

There should be no stains on the base - rust, dirt, lime streaks. That is why a layer of putty is necessary before pasting. There may be stains on the old wall that have appeared due to the presence of mold and fungus. Before starting the putty, they must be disposed of, otherwise the microorganisms will multiply very quickly in a favorable environment. New wallpaper will eventually turn black from mold.

To avoid this misfortune, the walls are additionally treated with a special primer that protects the surface from fungal formations. And only then a layer of putty is already applied.

So, here is the sequence of work before gluing wallpaper on the wall:

Removal of old coating.
Cleaning the walls from the remnants of wallpaper, stains, dirt and dust.
Base leveling.
Primer and putty.
Finishing work on cleaning the walls.

What tools will be needed to carry out the work:

a set of hard spatulas - wide, narrow and notched;
rubber spatula;
construction mixer for plaster;
protective mask - respirator;
tight gloves;
level or plumb;
skin;
roller

What materials for wall processing will be needed:

antiseptic primer to protect the surface from fungi;
plaster (gypsum is best);
putty.

The initial stage of wall preparation

All unnecessary furniture and any objects that interfere with work are taken out of the room. All that is left is covered with an ordinary plastic film or a sufficiently dense and durable cloth. All wall-mounted electrical appliances, including sockets, are dismantled, otherwise they will interfere with the quality of the work. Curtains from windows should be removed, and before starting preliminary work, turn off the electricity.

Once the work surfaces and space are clean, you can begin to remove the old wallpaper. This is the very first step before processing the walls for wallpapering. Old canvases cannot be left - they may not withstand the weight of new wallpaper (especially non-woven or vinyl). Old wallpaper will be saturated with water from the glue, get wet and warp.

In order to make it easier to remove old wallpaper, first they need to be thoroughly moistened with warm water using a roller or a regular rag. In this form, the walls remain for several hours, so that the wallpaper is saturated with water. When time passes, you can begin to remove the old coating. If the wallpaper turned out to be stuck tightly, you can steam it - for this you need to leave one or more buckets with hot water. The steam coming from the water will increase the humidity in the room, and the old wallpaper will be better removed from the wall.
It is most convenient to remove wallpaper with ribbons. If pieces are too well glued, they should be poured with warm water and scraped off with a metal spatula. It can be either regular or serrated.

So, when the walls are completely cleaned of wallpaper, it remains to remove the nails and dowels, if any. To avoid a fire hazard by accident, the wires must be hidden in special channels. Now it remains only to check with a plumb line or level the degree of evenness of the base and determine whether it is necessary to further level the surface.

Cleansing and leveling the foundation

By removing the remnants of wallpaper, lime, small irregularities from the walls, an even and hard surface is created, new wallpaper sheets will lie well and tightly on it. This is the very moment when it is necessary to decide whether additional layers of plaster and putty should be applied to the walls, or whether the work done is enough.

If the base turned out to have differences of less than 2 cm, then before puttying it is necessary to level the walls with plaster. It can be applied in fairly thick layers. Beacons are used to correctly determine the layer thickness.

The walls are leveled not with one spatula, but with two. In this case, it is necessary to periodically check the thickness of the layer with a level or plumb line. Be sure to carefully work out the traces of screws and nails, as well as various cracks and dents. If this is not done, the effect of the work will be spoiled.

When the necessary layer of plaster is applied, you need to leave it to dry completely. Once the walls have dried, they need to be leveled with sandpaper, and then treated with an antifungal primer. Its layer will not only protect the walls from fungi, but also improve their waterproofing qualities. If the walls are perfectly even, but they have spots of any origin, plaster is not required - a thin layer of putty is applied to the walls.

After applying the putty, the walls also require complete drying and leveling with sandpaper. After carrying out all work, the walls and floor of the room should be cleaned of white dust. Now the walls are ready for wallpapering.

Finishing work

Once the wall is cleaned and leveled, it is not yet possible to glue wallpaper on it. First, it is necessary to additionally process the base with a wallpaper adhesive composition. Especially carefully you need to miss those places where there is the greatest chance for wallpaper to peel off - door and window openings, corners, fasteners for heating radiators.

Wallpaper and smooth surfaces, such as paint or plastic, do not hold well. Such walls must first be made rough with sandpaper.

Do I need to plaster drywall?

It may seem that these actions are not needed, because drywall sheets are initially smooth and soft enough. Usually, only puttying the seams and dents in the places of self-tapping screws is enough. But here it is worth considering one fact - if you want to change the wallpaper, the task will become incredibly difficult, because they will stick tightly to the GKL. Such a coating will move away from the wall only together with pieces of drywall. In order not to get into such a situation in the future, plasterboard walls must be completely puttied.

Plasterboard walls are prepared for wallpapering in a slightly different way than concrete walls. The fact is that drywall is a more vulnerable material, some methods of cleaning the walls from the old coating are not suitable here, there is a risk of damaging the walls. To carry out the work you will need:

putty specifically for drywall and a container for diluting it;
reinforced tape;
primer;
set of spatulas.

The old coating is removed from the walls without the use of water. Here you need to be especially careful not to accidentally remove the coating along with part of the drywall. As soon as the old wallpaper is removed, the surface must be leveled with putty.

In cases where the apartment was purchased without finishing, and it is necessary to glue the wallpaper on absolutely clean walls, and not on the old ones, then you need to additionally process the seams between the sheets with a tape and putty all the holes left from the self-tapping screws.

Then the entire surface of the walls is covered with a primer, it must be selected specifically for drywall. It is sold in almost every store. building materials. Further actions are no different from those in the preparation of concrete surfaces.

To treat the surface before pasting the wallpaper, the walls are pre-treated with plaster, putty and primer. These materials not only level the walls, but also provide additional protection against fungi and mechanical damage. Processing walls for wallpaper is not too tiring, you can cope with it with minimal skills in repair matters.

The modern market offers today's consumer a wide variety of finishing materials. But wallpapers, as before, are at the top of popularity. That is why almost every person is faced with a number of questions, and one of them is how to prepare the walls for wallpapering? After all, the success of the repair will depend on proper preparation. Fortunately, such a process is a simple matter, but quite laborious.

Surface cleaning

Any wallpapering on the wall begins with surface preparation. Much will depend on the work done. appearance rooms.

Walls pasted over with old wallpaper should be thoroughly cleaned. Even if it seems that the tapestries are firmly attached to it, they still need to be removed. If this is not done, then the error will very soon make itself felt, but it will be impossible to fix it.

To make the old coating easier to remove, it is necessary to wet it with hot water. This procedure should be repeated several times. After soaking, the strips are easily removed with a metal spatula. Some wallpapers get wet quite badly. In this case, they are cut so that water can penetrate inside.

Now it remains to wash off the remaining glue. This will require a wide brush and plain warm water. We carefully process the surface, after which we clean it with a wide spatula.

Mold control

Sometimes indoors, especially in damp rooms (kitchen, bathroom), mold can appear. It definitely needs to be removed. Do not ignore the fungus, otherwise it will show up on new trellises. How to prepare the walls for wallpapering in this case?

Places with mold are treated with lime. To make this solution, take 1 liter of water and 200 grams of bleach. A fungicide can be used instead of a solution. By the way, when wallpapering such places, this substance must be added to the glue.

plaster layer

Before you prepare the walls for wallpapering, evaluate the existing plaster layer of the walls. It should not crumble or have cracks. Even if the entire coating has a holistic appearance, be sure to tap the entire area with a hammer. "Voiced" places signal that the plaster has lagged behind the wall. If a large area is damaged, it is better to remove the old layer altogether.

Primary primer

Preparation of concrete surfaces

Wallpapering starts on concrete walls from preparatory work to remove grease stains, dust, salts that have come to the surface. After all these manipulations, a leveling oil-adhesive putty is applied to various cracks, shells, and multiple irregularities. Be sure to apply another layer after drying.

After the wall is completely dry, the surface is polished with pumice. For these purposes, sandpaper is used. Now the concrete surface is completely ready for wallpapering.

When the tapestries are glued, all the irregularities and defects, which are often not visible on the puttied surface, perfectly show through. How to fix this and how to prepare the walls for wallpapering? There is a very simple but effective method.

Light a powerful lamp and position it along the wall so that the light glides over the surface. You can use a halogen spotlight. Lay it on the floor. Rays of light directed from the side will determine all the bumps. It is this lighting that will clearly show in which places it is necessary to carry out additional stripping.

By moving the spotlight along the wall, you will clearly see all the defects, which means you can smooth them out.

The following device greatly facilitates cleaning the walls. Purchase a special sandpaper (silicon mesh) mount that fits easily onto a 360-degree stick. Such a tool will allow you to quickly clean the walls, even under the ceiling, and much less effort will be required than when working with a manual grater. In addition, there will be no need for building scaffolds.

Instead of a conclusion

When choosing a certain type of primer, you should consider the material that is the basis of the product. Manufacturers have developed special formulations that are best used for heavy and light materials. The composition of the soil is divided into several types:

Acrylic. These impregnations are used for the treatment of concrete surfaces, drywall and wood. Great for living rooms, as they are odorless. Full drying time - up to 24 hours. Impregnations of this type are classified as universal.
Alkyd. Used to prepare wooden and metal surfaces for subsequent painting or pasting. Dries quickly enough - up to 12 hours. Cannot be used to protect plastered walls.
Glyphthalic. These impregnations are designed for metal products. It will take at least a day to dry.
Perchlorovinyl. Prohibited for application in living rooms. Designed for coating mineral substrates and metal products. Drying time - up to 4 hours.
Polyvinyl acetate. For high-quality impregnation under standard conditions, 30 minutes is enough. It is used to cover walls before gluing with PVA-based products.
Polystyrene. Also not recommended for interior protection. Designed to protect wood and plaster walls.
Phenolic. Designed to protect wood and metal elements.

A few words about the pasting process

If you decide to use the services of professionals when carrying out repairs, then they definitely will not have a question about whether it is necessary to prime the walls before wallpapering. And in the absence of this composition in the assortment of building materials you bought, they will certainly send you to the store for it. Moreover, the primer will literally flow like water when preparing the walls for pasting.

Let's see why you need to prime the walls? Wallpaper, even the most dense and embossed, is not able to level the surface, mask all the potholes and pores. If you stick them on an unprepared surface, then at a certain angle all the flaws will immediately catch your eye. It is unlikely that anyone will like it.

The primer also protects the wall from mold that can develop under the wallpaper. A particularly favorable environment for the fungus appears in the corners of the premises, and they often turn black. The primer will prevent the development of mold by sealing all pores and microcracks.

In addition, wallpaper adheres more tightly to the primed wall, as the adhesion of materials increases. Unprimed walls have pores in which air accumulates. If the wallpaper is pasted on such a loose surface, then literally in a month the panels will begin to diverge first at the joints, and then in other places.

The use of a primer significantly increases the level of reliability of adhesion of wallpaper sheets to the base. Even thorough cleaning followed by washing cannot completely remove dust particles from the walls. If they are not primed, then the dust rolls down and does not allow the glue to be distributed evenly over the entire plane.

For this reason, the wallpaper may eventually fall behind in areas where there was poor adhesion of the adhesive to the wall. Priming compositions neutralize dust by nailing it to the surface. As a result, direct contact of dust particles with the adhesive mixture is excluded.

Priming should be carried out without fail when wallpapering on walls made of highly porous materials - plaster, foam concrete, wood concrete, cement / gypsum plaster, etc.

A plastic cuvette (bath) for paint is also suitable when working with a primer. Helps to more evenly distribute the composition over the roller and remove excess

The primer seals the pores, which reduces the consumption of glue and significantly improves the quality of adhesion. Primers with White color, are great for processing walls under the sticker of thin translucent wallpaper. Such primers make the plane monophonic, hiding traces of paint and various stains.

1) It is necessary to prime the walls under the wallpaper carefully, evenly distributing the solution. Problematic surfaces (for example, too loose or from which dust “pours”) does not hurt to process twice.

Applying a primer to a plastered wall with a roller

2) Particular attention should be paid to priming hard-to-reach areas - corners, niches, curvilinear and figured working bases. It is in these places that the wallpaper most often lags behind due to poor-quality application of primer and glue.

A brush or small diameter rollers can be used to apply the primer behind pipes and at wall corners.

3) The wallpaper sticker is started only after the final drying of the primer layer. Drying time depends on several factors - type of substrate, type of primer, temperature regime and the level of humidity at the site.

Before treating the surface of the walls with a primer, it is necessary to prepare:

soil container;
paint roller with a pile of medium length;
medium flat brush
small flat brush.

It is advisable to use gloves when handling: when the soil dries, the surface of the skin darkens and sticks a little. Surface preparation according to all the rules includes several stages.

First, remove the old coating. To do this with a minimum of dust, you should use an ordinary spray gun, filling it with water: moistening the wallpaper will allow you to remove them in large fragments without scraping.

So that two-layer old wallpapers do not peel off, you need to wait until they get wet. This eliminates the need to use a spatula: mechanical movements can scratch the surface.

When the old coating is removed from the walls, it is necessary to plaster the walls using a cement-sand mortar or putty, cover up cracks, get rid of bumps, pigmented areas.

If lime remains on the surface, you can remove it with sandpaper. This process is difficult to perform without dust, so the doorway will have to be closed. After processing, they get rid of dust, including that which has settled on the floor. This should be done with a sponge slightly dipped in water. The sponge should not be too wet.

Then you can treat the walls with a primer. If, during the preparation process, old wallpaper is difficult to remove from the walls, you can buy a special liquid that the strongest glue cannot resist. It is possible to cover surfaces only after the putty is completely dry. If there is high humidity in the room, it will not be superfluous to treat the walls with a spray from fungus and mold.

But home craftsmen who are independently engaged in repairs quite often omit this procedure, considering it optional. And, it should be noted, completely in vain. Why? Let's try to figure this out. So, do you need to prime the walls before wallpapering? And if so, why, how and with what to do it?

Wallpaper has always been and still is a popular material for decorating wall surfaces. They are produced today in a huge number of various types, differing both in cost, and in texture, and in the materials from which they are made. However, one thing unites them: the walls under them must be properly prepared.

And those home masters who think that the thicker the wallpaper, the less time you need to devote to pre-treatment of the walls are deeply mistaken. It must be remembered: if you do not want the result of your work to cause only tears, do not try to save money. Ideally, the walls should first be leveled with plaster, and then puttied.

And at the same time, there is no need to wonder whether it is necessary to prime the walls before wallpapering, considering this procedure not noteworthy and trying to speed up the process. The primer mixture should always be at hand, and it must be used both when plastering, and when puttying, and before directly pasting itself. Why?

If budgetary repairs are planned, then you need to remove all old wallpaper, clean the walls of dust, inspect them and carefully repair all existing defects with putty. After that, you can start priming. In the same case, when large-scale finishing work is envisaged, the primer composition can be applied only after the finishing putty layer has been cleaned. That is, this will be the final stage immediately before pasting itself.

The primer applied to the wall will make it smooth and mask all the bumps. Therefore, the walls must be primed.

In preparation for priming and wallpapering walls, use the following tips.

Not everyone knows how many times to prime the walls. It is enough to apply a high-quality primer on a well-prepared surface once. On porous, heavily crumbling and moisture-absorbing substrates, primer should be applied in 2 layers.

The next layer is applied evenly over the entire surface only after the previous one has completely dried.
Dry primer is cheaper than ready-made liquid primer.
It is necessary to dilute the soil mixture strictly according to the instructions indicated on the package. The result should be a composition of a homogeneous mass.
Be sure to follow safety precautions, protecting the body and eyes from getting primer.
If you do not have the opportunity to buy a primer, you can apply diluted wallpaper paste to the wall before gluing.

What is the best primer to choose?

The undeniable advantages of wall impregnation using a primer prove that a primer under the wallpaper is necessary to obtain high-quality pasting. Which impregnation to choose depends not only on the composition of the roll material, but also on the type of surface.

It is best to treat concrete surfaces with universal acrylic or alkyd impregnations. These solutions, getting into the structure of concrete, create a slightly rough coating, which provides excellent adhesion when sticking both paper and non-woven wallpaper.

If the owners decide to paste over the ceiling, then these types of primer should also be applied to the surface of the floor slabs. Proper processing will not only increase adhesion, but also give water-repellent properties to the surface. H

When wooden walls are to be pasted over, primers for painting based on oil solutions are used. An acrylic primer is suitable for processing plywood or fiberboard.

For sheet materials (GVL, drywall, OSB), which are often used in new buildings, it is recommended to use universal acrylic solutions with an antiseptic. Such a base will be poorly impregnated due to the characteristics of the material, but on the treated surface it can be reliably placed vinyl wallpapers and glassware.

The choice of a particular type of primer depends on which wall is supposed to be wallpapered.

Primer selection video.

What is the primer:

Acrylic - designed to reduce the hygroscopicity of the walls, to prevent the appearance of new cracks on them. In addition, when using it, the amount of the required adhesive composition is reduced. Recommended for finely porous walls and drywall. Due to its composition, it easily penetrates the surface, smoothes minor defects. Acrylic primer is odorless, dries quickly, dissolves in water.
Latex - forms the thinnest film on the wall, which provides adhesion of the surface to the finishing materials. Recommended for plastered walls, as it has a strengthening effect. Latex primer improves the waterproofing properties of surfaces well. This type of soil fits well on concrete, stone, and is suitable for damp rooms.
Alkyd - similar in properties to paint. Suitable for wood and concrete, prevents the development of fungus and mold. This primer is often used before coating walls with latex or acrylic. Alkyd primer does not penetrate deep into the pores and is more suitable as a preparatory step before applying another type of primer. It is not recommended to use it on plastered and plasterboard surfaces.
Glyphthalic - not recommended for use in damp areas. Suitable for concrete, brick and wood walls. Dries within a day.
Universal - designed to cover any surface. It consists of acrylic and resins, diluted with water, penetrates well into the treated surface.
Wallpaper glue - not every type of glue is suitable for priming walls, you need to look at the instructions from the manufacturer.

The soil has practically no negative properties. Unpleasant moments when using it can occur with the wrong choice of coverage and in connection with its immediate features.

The disadvantage of liquid primers is their transparency and the penetration of stains through them. Therefore, applying them in wet rooms, you can get pronounced spots on the surface of the wallpaper.

A thick primer does not penetrate well into the surface of the wall.

The ideal option is to use two formulations at the same time. Liquid is applied with the first layer, thick - with the second.

Primer selection video.

The ideal option is to use two formulations at the same time. Liquid is applied with the first layer, thick - with the second.

Primer Properties

A primer is a special mixture containing substances that create a kind of film on the surface. Due to this, the base base absorbs less wallpaper paste and becomes more durable. In addition, the primed wall has high adhesive qualities, as a result of which the materials applied to it adhere better to the surface and last longer.

Preparation of a mixture for priming

Do walls need to be primed before wallpapering? Often, many refuse to prime the surface. Sometimes it really isn't needed. For example, if the base is even and strong. But if it is necessary to strengthen the surface or increase the level of adhesion, then the primer is simply irreplaceable.

It can be used not only for wallpapering, but also for painting or putty. It will not only strengthen the surface, but also protect it from negative impact moisture and prevent mold and mildew. In the case of wallpaper, the primer will increase the level of adhesion, which will ensure good adhesion of the coating to the wall.

Why prime the walls before wallpapering? If the wall is loose, priming is a must. If neglected, the coating will not last long, and the base itself will begin to crack and crumble. Also, with a high humidity in the room, mold, fungus or stains on the lining may appear.

Do wallpapers need to be primed before painting? Experts recommend performing a similar procedure in order to increase adhesion between the coating and the mixture. Does wallpaper need to be primed before painting? Priming should be applied to different types of fabrics, including non-woven wallpaper.

How to prime the walls before wallpapering? This question worries many beginners in the construction business. The process of priming walls for wallpaper with your own hands is no different high complexity but there are a few things to keep in mind:

It is possible to apply a primer for wallpapering only at a certain temperature. It should be between 5 and 30 degrees. The average humidity should be 75%.
Before work, you need to prepare all the tools in advance. You will need the following: a brush, a roller, a container for soil and a table or stepladder.
The first step is to prepare the surface. You will need to wash off the whitewash and remove the old coating from the wall. If there are pieces of paper left, they must be moistened with water and removed with a spatula.
Further, according to the instructions on the package, a white primer for wallpaper is diluted.
The mixture is mixed with a special construction mixer. If such a tool is not at hand, mixing is carried out manually.
The required amount of solution is poured into the container and the required amount is collected using a roller. You need to do everything carefully so as not to splatter the composition.
The wall is carefully treated with a solution so that there are no dry areas left. But use too a large number of composition is also not recommended, this can lead to the formation of streaks.
How to treat areas that are difficult to reach? Hard-to-reach places are best treated with a brush.
After the first treatment, you need to wait two hours for the solution to dry. Drying time directly depends on the type of product selected and purchased.
After drying, you can proceed to applying the second layer.

You should also not use this type of primer for wallpaper - after all, the wall will be plastered in any case, and completely different primer mixtures are friends with plaster. They dry in about 15 hours.

glyptal

perfect for both wood and plastered surfaces;
dries for a very long time.

This primer option is much closer and can be called universal, but the only drawback - a long drying time - makes many craftsmen lean towards a different choice. We note the popular mixtures: GF-021, Ecol.

Acrylic

100% universal;
dries very quickly;
perfect for wallpaper.

In any incomprehensible situation, buy an acrylic primer. This, of course, is a joke, but there is a lot of truth in it: it will suit any surface, and it will dry even faster than you can pick up the most beautiful wallpaper to your interior. Focus on the following names: Ceresit, Snezhka, Pufas, Forman - quite high-quality solutions at a reasonable price.

Well suited for application to a variety of surfaces. The composition is divided into two groups: water-soluble and based on organic components. Water-soluble compositions are intended for work on interior decoration rooms with low and medium levels of humidity. It is advisable to purchase organic primer mixtures for processing objects with high humidity. In general, acrylic "organic" is primarily used for external work.

In addition, acrylic primers are strengthening, adhesive and penetrating. The latter variety is used for priming porous walls and surfaces that have lost their strength (old plasters, concrete walls that have begun to delaminate, etc.).

Penetrating primers have the ability to soak into the material to a depth of 100 mm, strengthening it and reducing the degree of porosity.

Acrylic-based adhesive primers create a thin film layer on the work surface, with which the adhesive adheres very well. The film layer also helps to further level the plane. This type is great for sticking heavy wallpaper.

Acrylic-based strengthening primers are not deeply absorbed. Their main task is to bind dust particles.

2. Adhesives

Many of us remember that earlier a paste was used to fix the wallpaper, which was cooked at home from starch. It was applied to wall surfaces in two layers (as a primer), and the canvases themselves were smeared.

This method of sticker can be used when working with low-porous walls, on which light wallpaper made of paper will be applied. Currently on the market are different types glue, similar in properties to the "homemade" paste. If the label of such a product indicates that it can act as a primer, then there is no need to purchase the latter.

Again, it is advisable to use factory-made paste-type adhesives only for working with light paper webs.

Primers based on alkyd resins have long been used to treat various substrates. The best way they are suitable for application to natural wood and wood composites - OSB, chipboard, plywood, fiberboard, MDF, etc. In addition, alkyd mixtures containing glyptal alkyd resins can be used to prime metal substrates.

1) It is necessary to consider what material the walls are made of. On sale there are universal primers. They are not cheap, but they allow you to work with almost any wall. The purchase of such primers is relevant when the room has walls, partitions and other surfaces for wallpapering, made of different materials.

2) It is important to take into account not only what conditions will be in it after the repair, but also what humidity and temperature conditions will be maintained at the facility during the priming of the walls. If ventilation cannot be organized for any reason, then it is advisable to opt for soils that do not emit substances harmful to health when applied.

4) Before buying a primer, be sure to ask the seller to present a certificate confirming the quality and sanitary and hygienic safety of the goods. Now fakes are very rare, but it never hurts to “insure”. You can also smell the product - if it emits a strong smell of ordinary PVA glue, then most likely it is a fake (with the exception of primers made with the addition of PVA).

Finally, do not try to buy the cheapest primer, especially if you started a major overhaul and purchased expensive wallpapers. It is better to give your preference to primer mixtures from the middle or high price category from reputable manufacturers.

Preparing the surface of the walls for pasting is quite simple. This task will be mastered by any beginner in construction, the main thing is to follow the recommended sequence of actions:

For successful treatment of walls with impregnation, it is recommended to ensure the temperature and humidity conditions in the room. To perform work, temperatures from 5 to 30 ° C are allowed, and humidity - up to 75%.
All tools are prepared before work begins.
Before priming, the walls should be cleaned of old wallpaper and paint. To do this, use a spatula and hot water. If the old coating is difficult to remove, you can use special solutions to remove wallpaper.
The cleaned surface is checked for cracks and irregularities, which are corrected with putty, followed by the application of leveling solutions.
In a bucket or other container, thoroughly mix (with a mixer or manually) ready-made solutions or prepare a primer according to the instructions. If it is planned to paste over the walls with wallpaper for painting, it is allowed to add appropriate pigment compositions to the soil, which will create a better base that does not contrast with the main color of the coating.
With the help of a brush, the finished solution is first treated with hard-to-reach places (corners, adjoining walls to the ceiling).
The main area is covered with a roller. For convenience, the primer is poured into a bath with a cuvette.
Re-treatment is possible after the final drying of the previous layer. For high-quality preparation for gluing, it is enough to process the surface twice.

It is worth noting that there are quite a lot of primer mixtures on the market, and they differ markedly in composition, purpose, and cost. But there are four types of them. These are glyptal, alkyd, perchlorovinyl and acrylic. If you do not know how to prime the walls before wallpapering, the material must be selected based on the characteristics of the surface to be pasted.

Alkyd mixtures are ideal for wood, but not particularly friendly with plastered surfaces. So, if you have to glue on fiberboard, chipboard or other surface of this kind, then get this type of soil. The most popular and relatively budget compositions are primers of the Tikkurila brand.

Glyphthalic is suitable for both wood and plaster. But she has one drawback - she dries for a day. The most popular formulations are GF-021 and Ecol.

Perchlorovinyl primers, as a rule, are not used at all for wallpaper, as they are used more for outdoor work.

Acrylics are versatile, dry quickly and are ideal for our purposes. The most common brands are Ceresit, Snezhka and Pufas. So, if you don’t know how to prime the walls for wallpaper, get one of the acrylic mixtures - you definitely won’t lose.

Wall primer is preparatory stage surface treatment before gluing. This tool has a strengthening effect. It is a mistake to think that it is needed only to enhance the quality of the glue: this product has a wider effect.

This is a protective film that really helps to improve the adhesion of the wallpapering surface. However, it does not just promote bonding: depending on the type, this tool also levels the walls, makes them uniform in structure.

A wide range of primer materials is presented on the modern construction market.

According to the type of solubility of the primer are:

based on organic acids (alkyd resins, polyurethane, latex);
water-dispersion, which can be diluted with water (acrylic, latex, silicate, silicone);
mineral (based on lime, gypsum, cement).

By appointment, they are:

universal;
specialized;
antifungal;
insulating;
strengthening.

Consistency matters. Usually a transparent composition is more liquid. The white counterpart is more viscous and denser. Consistency determines penetrating ability.

Liquid transparent compounds strengthen the outer layer of the wall and bind dust. Among these varieties, one can find solutions with special additives, through which alkalis can be quenched. The price of such primers is acceptable.

Compared to their denser counterparts, their penetrating power is 25% greater. The disadvantage of such a primer is the heterogeneity of the application: when processing the surface, it is not visible which area is already covered with a primer. As a result, the part on which there is more soil gives itself out as a gloss. Heterogeneity is dangerous because the adhesion during wallpapering will be different.

Thick primers, unlike liquid varieties, are able to correct the surface of the walls before wallpapering. They eliminate small irregularities, have an antistatic effect, quench alkalis, creating a smooth film. Filling the micropores, they paint the surface of the wall, so the entire treated surface is visible during processing.

Its penetrating power is lower, such a primer is good for walls with a homogeneous structure without visible defects. The smoothness that this primer creates is suitable for plaster and thin wallpapers, as well as photo wallpapers. For liquid wallpaper, such a primer is not suitable.

The primed wall is made even and dry, the primer increases the reliability of the adhesion of the adhesive to the surface. good primer ensures that the bottom layer remains intact and does not crack, in addition, it will not allow moisture to soak into the walls.
The primer applied to the wall allows it to “breathe”, thereby creating a good microclimate and preventing the fungus from spreading. Do not think that the wallpaper will stick well on the wall without a primer, this is a huge misconception.
The primer strengthens the outer part of the wall and penetrates inside. It simply fills the cracks and pores of the surface. It enhances the bonding of surfaces and prolongs the life of the wallpaper (see Wall decoration with wallpaper in the correct design). This is one of the main parameters why the walls are primed for wallpapering.

Preparation

What wallpapers are suitable?

At right choice primer prepares the surface for wallpapering different type. Paper, vinyl, non-woven and textile wallpaper on paper and non-woven bases.

However, it should be borne in mind: re-gluing the wallpaper, if necessary, requires re-applying the primer. Well will keep on the walls and glass. Such a surface can be updated by painting, which is convenient if you want to update the wallpaper background or mask pollution.

Liquid wallpaper will lie better on the surface without dripping on it when applied with a spray gun. It is important to consider: first, the walls are cleaned, only then they are treated with soil. Other options that bond well with a primer include cork and bamboo materials. Self-adhesive PVC is tightly glued.

Application

It is easy to apply a primer on the walls with your own hands.

To do this correctly, you should read a small instruction:

Initially, you need to prepare the tool for work. If the soil needs to be diluted, use water room temperature. It can be diluted with water only if the water type of solvent is indicated on the package.
It is necessary to dilute the agent until a homogeneous structure is obtained. This is especially true of the concentrated type material. For such soil, you need to prepare a separate container.

If necessary, white color can be added to the composition. If it is necessary to tint the primer under the wallpaper, it is undesirable to use beige, pink or another color: they will distort the original color of the wallpaper.
Pour the primer into the container in parts. Firstly, the abundance of liquid will prevent uniform application to the surface of the walls (ceiling). Secondly, during the work there should not be a primer: at the bottom of the container, in any case, there will be dust particles, specks, which are unacceptable to pour into a common canister.

In the arsenal of an experienced craftsman there is a spray gun, through which the time for priming the walls is halved. At the same time, it is much easier to process hard-to-reach places (for example, slopes). It is easier for a beginner to apply the composition with a roller. To do this, the roller is lowered into a container with a working solution, moistened in the ground, slightly rolled inside the container.

There should not be much soil, otherwise it will flow along the roller, then along the handle and flood the floor surface before it hits the desired plane. Savings are also unacceptable: if the composition is small, it will not be able to penetrate the walls properly, therefore it will not strengthen the base.

You can navigate like this: if the soil does not flow in a stream and does not drip, you can process the surface. If it is planned to wallpaper the ceiling with wallpaper, the processing becomes somewhat more complicated: less composition and more rolling on the surface are needed.

When processing the main walls, use a roller. It is lightly pressed to the surface, rolling several times in one place, evenly distributing the composition.

Fluid must not run down walls or drip from ceilings. The soil layer should not be dense. IN hard-to-reach places(corners, slopes) use a brush.

Where it is difficult to reach with an ordinary brush, take a small one. The use of brushes allows you to save a primer and carry out the processing of difficult places as accurately as possible. At the end of the working process, the tools and containers are thoroughly washed. The second layer of primer is applied only after the first one has dried.

Drying time

The drying time of the primer depends on its type and density of the solution, as well as the place of application, the temperature in the room and even the time of year. On average, the primer dries from 12 to 24 hours.

Some varieties dry faster: this process can take 5-6 hours. Typically, the manufacturer indicates the drying time on each package of the composition, so that the buyer knows this in advance before buying.

For example, acrylic varieties dry for about 24 hours (one layer), quartz counterparts need less time, mineral ones also take several hours.

Shellac, containing alcohol, dry quickly. However, the masters believe that, despite the assurances of the sellers, such primers need at least 10-12 hours for the film on the surface of the walls to be as strong as possible.

The same can be said about alkyd compositions: it is better to wait 12-14 hours and only after that engage in wallpapering, laying tiles, water-based paint if the design allows it. The process can be accelerated, however, the methods of accelerating drying have not only pluses, but also minuses. Experienced craftsmen have a heat gun for this.

To achieve the best result, it is necessary not only to correctly apply the primer to the walls, but also to wait for it to dry completely.

If you start wallpapering ahead of time, then everything beneficial features coatings will not work or, even worse, will lead to the opposite effect.

The fastest drying time for an acrylic primer is a maximum of 5 hours. Oil primers need at least a day to dry.

In addition, the drying rate of each primer layer is affected by the humidity and temperature inside the room. The primer dries especially long at a humidity of 60%.

How long after priming the walls can wallpaper be glued? Many people ask this question.

How to prime the walls with your own hands?

Before applying any primer, the walls should be thoroughly cleaned of the old coating and all loose elements should be removed (see photo).

Large chips and dents are sealed with putty, and after puttying, the wall needs to be primed. If the walls are porous, liquid impregnation is applied first, and then a thicker composition is applied.

There are some features of the soil for gluing a certain type of wallpaper:

Under non-woven wallpaper. Walls are usually primed with white primer to ensure an even color of the surface, which will prevent showing through under a fairly thin interlining. dark spots. It is necessary to dry the walls for pasting this type of wallpaper especially carefully.
Under vinyl wallpaper. A deep penetrating acrylic primer is recommended. Acrylic primers include latex, which promotes better adhesion of heavy vinyl to the surface of the walls.
Under liquid wallpaper. For wall covering liquid wallpaper they are recommended to be covered with a transparent emulsion or a white primer. The primer is applied in two layers with an intermediate exposure of at least five hours. If the wall is smooth, then the primer for liquid wallpaper should be with quartz dust, to give the surface some roughness. This quality is necessary for a uniform application of a layer of wallpaper.

You can make a similar primer yourself by adding clean river sand or marble (quartz) dust.

Do-it-yourself wall priming video instruction.

Overview of popular brands

"Belinka". Deep penetration primer. Levels the surface, improves the adhesion of the coating. Allows for uniform color. Suitable for all types of plaster, brick, concrete, drywall.
Tiefengrund Knauf. It is applied on the hygroscopic bases. Penetrates deep into the surface, prevents shedding and cracking, creates a breathable layer. Not suitable for wet rooms, as it does not isolate water vapor.
Livna. Strengthening impregnation.
Cleo. Transparent primer, diluted with water. Contains antiseptics that protect walls from mold.
Ivsil. Latex primer recommended for drywall, brick, cement plaster. The composition includes antiseptics.

Priming the walls according to all the rules before sticking the wallpaper will achieve the perfect result. No streaks will appear on the walls, and the pasted wallpaper will not fall off or spread, which means that you will admire the results of your work for a long time.

Making a choice between right type surfaces, each master has his own preferences, based on the quality of the material and its properties. Experienced professionals allow the use of two types of primer. When treating the surface before sticking wallpaper for the first time, the wall structure is leveled with a transparent mixture. After that, another (white) primer is applied: it is the final stage of preparation for facing.

Based on their experience, the masters recommend that when choosing a primer, start from the thickness of the wallpaper. Deep penetration compositions are able to hold especially durable wallpaper sheets on the surface of the walls. Such varieties include structural heavy varieties. For example, two-layer vinyl models or varieties for painting: when applying each layer of such wallpaper, the thickness will increase. Due to the soil, you don’t have to worry about it: the wallpaper will stay on the walls for up to 20-30 years.

With regards to liquid wallpaper, the situation is different. To keep them firmly on the plane of the walls or ceiling, you need a primer with quartz. Varieties that form a smooth surface are not suitable for them.

The structure of liquid wallpaper is such that for reliable adhesion, it needs to hold on to something. For such wallpapers, it is not necessary to perfectly align the planes: the primer can be applied to a non-plastered surface, while roughness is important. So the mass will cling to grains of sand, and it will be easier to smear it on the walls.

The mixture is diluted in small portions. This will not only eliminate the overabundance of the solution, but will also ensure that the composition is always clean during the priming process. The prepared solution is used on the same day. It is unacceptable to store such a composition, as it loses its properties.

If you need to apply liquid to the plaster, you should not further dilute it: the cement-sand mortar is highly absorbent. Such processing will dry for a very long time, which will delay the drying time.

If, during the processing of the walls, the primer fell on a plane that cannot be finished, it is necessary to immediately wipe it with a cloth dipped in water. If the tools are not washed immediately, the bristles and roller coat will harden as the primer dries.

It will not be possible to return their former softness; for subsequent work, you will have to buy new brushes and a fur coat. If there is furniture in the room that cannot be moved out (for example, drawers for a kitchen set), it should be covered with a wide plastic wrap, which can be bought at a hardware store.

Experts recommend buying a primer in larger quantities or concentrated form. As a rule, when processing walls before wallpapering, it will take much more than indicated by the manufacturer. The number of layers of soil matters: craftsmen pay attention to the fact that walls made of concrete, brick, fiberboard, drywall can be primed no more than 2 times before gluing the wallpaper.

If the wall is wooden, two layers may not be enough. However, this does not mean that it is possible to abundantly fill the surface with a solution. It is better to apply several thin layers.

Using a primer is convenient because the wall does not get dirty. When gluing wallpaper on it, spots will not appear. To prevent the formation of lumps during stirring, you can use a construction drill with a special nozzle. You can start pasting when the surface stops sticking.

Primer walls for wallpaper: why and how is it done

Primer for walls under wallpaper is available in retail, and they themselves make it quite often. But many are wondering if it is necessary to prime the walls before wallpapering, and if so, then how to prime the walls before wallpapering. Our article will be devoted to this topic. You will be able to see photos and videos on this topic and do the job correctly.

Preparation

Wall priming is carried out after all the initial stages of work, including the removal of nails and old plaster.
The primer is applied after applying the putty, which has had time to dry.
The priming of the walls begins with the fact that the wall is moistened with a special impregnation. This is necessary in order to wash off the dirt and dust that remains after a rough surface treatment, because wallpaper cannot be glued to a dirty wall.
Everyone knows that newspapers were first glued to the wall and wallpaper was already on them, but now the primer has forever replaced printed materials.
After the primer dries, the wall does not get dirty and becomes stronger than before. Thus, the wallpaper lays flat on the wall and holds firmly and for a very long time.
If you got a wall that was previously covered with wallpaper, you need to remove them and wash off the glue. This is done with a metal spatula or scraper and water.

Attention: If the wallpaper does not absorb moisture well and does not lag behind the wall well, then cuts should be made on the wallpaper for better moisture penetration. These days, stores sell a special liquid that quickly removes wallpaper. This liquid is added to a bucket of water, and wet the wall, leaving it soaked for half an hour. After half an hour, wet the wall again and easily remove the old wallpaper from the wall.

When the wallpaper is removed, it is necessary to properly wash the wall with warm water and clean the surface of the wall with a wide spatula from glue and whitewash.
Often in rooms with high humidity, such as a kitchen or bathroom, mold collects in the corners. This mold must be removed so that it does not appear on the newly repaired wall.
Places where mold has settled should be treated with bleach. As a rule, 200 grams of lime are required per liter of water. It should be noted that when pasting places where there was mold, glue must be bought with a fungicide content.
After removing old wallpaper, glue and mold, it is necessary to meticulously inspect the surface of the walls. Found cracks and irregularities must be puttied. If your apartment is not warm enough, you can make it warmer with a thin layer of Styrofoam. This method will not only make the apartment warmer, but also hide wall defects.
Before you prime the ceiling, you need to get rid of the hook, holes and cracks properly by filling them. If the ceiling consists of drywall, gypsum or other porous surface, then it must be primed in any case.

Primer work

Now we decide how to prime the walls before wallpapering. There are a lot of materials in retail. Some do it just with pva glue. The walls are also primed before wallpapering with the glue that will be used when gluing the material itself, for this it is simply made more liquid.

Therefore, it is up to you to decide how to prime the walls under the wallpaper. Just before that, the instructions for using the primer should be carefully studied, it can simply be for different surfaces. Although all of it is applied and completely with your own hands. So:

The primer composition is best diluted in a bucket. The primer is different and before diluting it, you need to read the instructions that are written on the package.
Stir the mixture well so that there are no lumps left. To stir the solution, you can use a drill with a mixer nozzle, in this case it turns out very good composition. Manually, this quality of the composition is difficult to achieve.
The primer is applied with a wide brush. This is very similar to whitewashing the ceiling (see Ceiling lining: types of material). Having spread an even layer of the composition on the wall, avoiding irregularities and untreated areas.
After you have primed the wall for the first time, you need to give it time to dry. Drying time is usually written on the packaging. Even if by your standards the surface of the wall after the first primer looks perfect, you still need a second coat of primer.
A lot depends on the quality of the wall on which the primer is applied, which can be impregnated differently on the same wall. When re-priming, the quality will be excellent and there will be no differences. On a completely flat wall, you can work with a paint roller, it is much more convenient and smoother than working with a brush.