Do I need a primer before wallpapering? How to prime walls before wallpapering

Surface priming is an essential step before any type of decorative finishing. To do high-quality repairs, you should familiarize yourself with how to prime walls before painting, tiling and wallpapering.

Peculiarities

The primer prevents the appearance of various stains on the surface, eliminates shedding and cracking of the base. Also, the use of this material can significantly reduce the cost of glue, which is required for wallpapering.

Priming has some features that you should be familiar with.

Before the work process, it is necessary to treat the surface by removing the previous coating. Remove old wallpaper and remove any remaining glue.
To make the process of removing coatings easier, you can pre-moisten the wallpaper with water and wait until it absorbs moisture. Delete old glue from the walls you can use special products that are sold at any hardware store.
It is strictly not recommended to apply primer to walls that have just been repaired. If you treated the surface with putty, wait until the material is completely dry.
Before using the soil, it is necessary to remove fungus and mold from the walls.

Ignoring these rules will lead to the wallpaper quickly peeling off the surface, and mold will multiply and ruin the entire appearance of the room.

Kinds

Almost every soil mixture is a white liquid. In a separate category there are primer paints in which the white color can be tinted. Some manufacturers already offer ready-made mixtures with colored pigment. For roughing it is necessary to use a solution deep penetration. Acrylic or contact mixture is also available for sale.

You can use latex primer. It differs from other solutions in that it is capable of penetrating into the material to a depth of 10 mm. The walls are treated with this soil several times. Each layer must be applied after the previous one has completely dried.

Other types of soil are selected based on the wallpaper material. All types are divided into several categories.

Acrylic primer. This type of solution is used for intermediate measures old surface: concrete, plaster, brick, stone, wood and plasterboard. You can also apply this material for putty. The mixture dries in 35 hours. The soil can be used in residential areas, as it does not have an unpleasant odor.
Primer based on alkyd resins. This material is purchased for working with wooden and metal surfaces, as it has anti-corrosion properties.
Glypthal soil Only used on metal walls. After you have treated the surface with these materials, further work can be done no earlier than 24 hours later.
Perchlorovinyl solutions Suitable for mineral and metal substrates. Experts do not recommend using such material for interior work. The coating dries quickly, which is why it is in great demand.

Primers with glue, which contain polyvinyl acetate. Such solutions should be used if decorative coating will have a similar composition. This solution has a fast polymerization time of 30 minutes.
Polystyrene primer can be used when applied to wood and plaster. The ingredients contain organic solvents, so the material should not be used in a residential area.
Phenolic soil used for processing wood and metal.
Epoxy mortar Can be used when working with metal or concrete.

Primers are also divided into liquid and dry. The first option involves applying already ready solution to the surface. The crumbly composition must be diluted with water yourself.

If you choose adhesive for priming, make sure that the packaging of the mixture contains information that the product is intended for this work. If there is no such inscription on the box, then the glue can only be used for wallpapering. In some cases, you can use this option, but it will not guarantee the same quality that you will get with an acrylic primer.

Experts do not recommend saving on primer for your home; you should also not try to create a similar composition yourself, since they are already on sale ready-made options, with the help of which you can make high-quality repairs for many years.

How to dilute the mixture?

Primer is an inexpensive finishing material that is in wide demand. However, to treat the walls before wallpapering you will need a large amount of the mixture. Before use, dilute the mixture with water according to the manufacturer's instructions.

Each manufacturer indicates on the packaging required amount water required to dilute the primer. The average rate is 1 part water to 2 parts soil. The mixed solution can be stored for no more than 12 hours, since the important properties of the composition are gradually lost. When applied to plaster, it is not recommended to dilute the mixture, since the cement-sand composition has the ability to absorb moisture.

To make a quality repair, you must strictly follow the instructions, since incorrect mixing will lead to the fact that the primer will not perform its intended purpose and you will need to redo the entire job again.

What to apply?

To prime the surface of the walls before wallpapering, you will need to decide on the type of tool with which you will apply the mixture. Some people apply the solution by hand, others like to use a spray gun.

Using a sprayer is beneficial because it saves time. However, if you choose this method, provide sufficient protection to the ceiling and floor, as small drops of soil that are sprayed from the spray gun may settle on other surfaces.

For handmade You can use a roller or brush. Paint brush will be needed for coating hard-to-reach areas and corners. Its fluff can also penetrate into deep holes or under pipes. Use this tool to treat areas around sockets, switches and other small parts. The operation of the brush is accompanied by some inconveniences, which include labor intensity, since the tool can only cover a small area of the working area.

There are two types of brushes: radiator and flat. The first serves for delicate application of the composition around small elements. The other can be used for the remaining parts of the wall.

Many people prefer to use a roller. It is capable of simultaneously processing large plot foundations, which reduces the time spent on repairs. Using this tool you can apply the primer in a thin and even layer. After it, the solution does not form streaks or unnecessary accumulations. Despite its convenience, the roller is not suitable for processing areas with depressions.

Subtleties of application to various surfaces

Before gluing wallpaper, a primer should be applied to the drywall. This is a mandatory measure that ensures the future material adheres to the wall and also protects the surface from the appearance of harmful fungi. Suitable for drywall acrylic primer. If you choose a concentrated solution, you need to study the instructions before diluting it with water. To avoid unnecessary hassle with diluting the primer, you can purchase a ready-made composition.

If you are going to wallpaper on metal, then for this case we have developed special types solutions.

To ensure moisture impermeability, an insulating primer is used. Alkyd and epoxy mixtures correspond to these parameters. Such soil covers protective film surface, preventing metal corrosion. Such properties of the composition are provided by chromate and phosphate, which are in the list of ingredients of the solution.
Phosphate-based primers are used for ferrous and non-ferrous metals. The primer consists of two components: a base and an acid diluent. These components can improve adhesion.
Primers aimed at removing formed rust. Such compositions contain orthophosphoric acid, which allows you to dissolve pockets of corrosion. It forms a protective layer on the surface of metal walls, which takes care of the condition of the base.

Good waterproofing will be required for bases that are located in rooms with high level humidity. To do this, you need to use primers on water based. Special attention should be given to old concrete surfaces. For this type of surface, a deep penetration primer with a strengthening function is used.

To process wood, you need to choose the right mixture. It should reduce the flammability of the material and improve adhesion to the future coating. The first layer is applied to fill the cracks in the material. A second coat is recommended if the wall is very porous. The choice should be made on the insulating type without additional hot drying.

You should use a primer in any case, regardless of what surface you are going to treat: ceiling, walls or floor. Also, do not forget about priming the slopes to prevent the appearance of mold there.

Lately everything more people They use latex-based compounds; they create an elastic film on the surface and are resistant to moisture, which is also important when finishing. Use this composition if the room being treated has a high level of humidity.

The process of priming any type of surface goes through several stages.

Surface preparation before applying the product. First, the surface is cleaned, getting rid of dust, dirt, and excess debris that will affect the outcome of the work.
The mixture is poured into a plastic container. The roller is coated with the product, then several movements are made along the ribbed surface of the tray to get rid of excess substance from the tool.
The mixture must be applied thin layer. Beginners have the erroneous opinion that the layer should be thicker.
Using a brush, corners are processed in places where the roller does not go through.
After completion of work, the surfaces must be dry.

How long does it take to dry?

Many buyers are interested in how long it takes for the primer to dry completely. This information is indicated by the manufacturer on the packaging. Before purchasing, be sure to read the instructions to make your choice.

The minimum drying time for acrylic primer is three hours. The polymerization process of oil compositions takes 24 hours.

These rules apply if the premises in which the work is carried out has necessary conditions. The temperature in the room should be 25 degrees. Humidity level is about 64%. If you cannot provide these conditions, the polymerization time is doubled.

So that everything goes smoothly during the process, and soon after the repair, mold does not appear under the surface of the paper sheets, priming is carried out. How to properly prime walls before wallpapering - videos, photos and expert advice, all in our article.

Primer educational program

Why prime?

Firstly, the soil allows you to create a reliable foundation for...
Secondly, it holds the top layer of plaster together, preventing its destruction and the appearance of cracks, which, in turn, affects the service life of the coating.
Of course, don’t forget about protection from pests and mold. Many formulations contain an antiseptic, which prevents various pests from developing under the wallpaper layer.

When painting a wall, primer allows you to save materials, reducing consumption several times.

And yet, is it necessary to prime the walls before wallpapering? Of course, this procedure allows you to achieve high-quality results.

Before applying the composition, thoroughly clean the surface of the walls or ceiling, remove the layer old paint, seal cracks in the plaster.

Types of primer

Solаks acrylic composition

Priming with conventional glue is being replaced by special compounds designed for processing various types surfaces.

The need to use one or another type of composition is determined by the condition of the wall, as well as the conditions in the room ( heat or high humidity).

Special primers are not used for front finishing, but failure to use them can lead to the fragility of the coating and excessive consumption of covering materials.

On the market today building materials There are several types of compositions that are divided into groups based on the binder and can be used indoors:

Acrylic.
Can be used on almost any surface (plaster, concrete, cement, brick, wood, plywood). They have no specific odor and dry within 5 hours. Most often they are used for.

Alkyd.
Best suited for processing wooden surfaces. When the material comes into contact with the wood structure, a surface is formed that is susceptible to most finishing coatings.
Drying time – up to 15 hours. Convenient for use in country house with wooden walls.
There are several types of alkyd compositions: based on zinc phosphate (suitable for alkyd paints), based on zinc chromate, which has almost the same properties, but has a wider range of applications (not recommended for use on gypsum and plaster).

Glypthal.
Designed for processing metal and wooden surfaces. What if you want to do it in the garage? Can only be used in rooms with low humidity. Drying time is a day.

Perchlorovinyl.
Can be used for coating metal surfaces, as well as for concrete and brick covered with plaster.
Used primarily for external work, easy to carry low temperatures. Dry in one hour (at a temperature of +20 ° C).

Performing priming

Is it necessary to prime the walls before wallpapering? This question is often asked by apartment owners on the eve of renovation. Home renovation is always a lot of work and hassle. Even if it is done by workers, the owners also have something to think about.

Do I need a primer before wallpapering?

Right organized process- half the result. At the same time, I want to save money without doing extra work. The process of updating walls (pasting wallpaper) consists of several stages. or the coating should be removed, and then the surface is prepared for gluing new wallpaper. This raises the question: “Is an additional primer necessary?” Let's figure it out and find out the correct answer.

Sometimes teams of workers are ready to carry out even an extra stage of repair in order to receive a higher payment. But how do you know how much priming is needed? Perhaps this finishing step can be skipped? walls before wallpapering? Today there are many options for finishing wall decoration, but wallpaper is still popular not only in residential buildings, but also in offices. There are heated debates regarding the preparation of walls - some consider primer necessary process, others say it's a waste of time.

When choosing a soil, it is necessary to choose a deep penetration soil. Also important criterion is the water resistance of the soil, because Wallpaper glue is basically water with glue added.

The soil must be strengthening, because For interior work, gypsum materials are usually used, and gypsum is not highly durable (plasters, putties) unlike cement ones. Particular attention should be paid to antiseptic or anti-mold additives.

A universal primer with deep penetration that does not create a film (which is important for your walls to remain breathable) is a primer based on acrylates. This primer will perfectly strengthen the base, even out the absorbency of the base, reduce the consumption of wallpaper glue and at the same time has a highly penetrating ability. Acrylate primers are also economical in consumption.

Or is a ready-made acrylate primer that does not require the addition of solvents or water. The antiseptic additives included in the primer prevent the growth and spread of fungus and mold, which is why these primers are very recognizable and in demand among builders.

Priming the walls primarily prevents premature peeling of the wallpaper. After all, it will be a great pity for the wasted effort when the owners, already pacified by the completion of the renovation, notice that the wallpaper, glued with such diligence, is coming off or bubbling in some places. Such a “surprise” will ruin any mood. After all, re-pasting wallpaper is additional expenses and wasted time. Whether it is necessary to prime the walls before wallpapering, we will try to explain in the next paragraph.

Reasons for priming – useful know-how

Here are a few reasons in favor of priming:

1. By impregnating the surface of the walls with a primer, we create a binding effect for the base, reducing the formation of dust and crumbling.
2. Coating with a primer eliminates fungus and mold, preventing their further development and spread.
3. The base is strengthened by the binding effect of the primer, which fills microcracks.
4. Adhesion increases, normal adhesion of the surface to the wallpaper occurs.

So, the primer issue shouldn't even be debated. There is only one clarification left - how many times should the surface be primed? For optimal adhesion - several times, because the greater the thickness of the primer layer, the better the adhesion of the wallpaper to the walls. However, measures are needed here too - after all, unjustified application of extra layers of base will lead to excess consumption of materials and additional useless expenses. Consumption is calculated when using the material for 1 square meter. The types of composition vary, depending on its functions, quality, density, but on average this value for a primer ranges from 100 to 350 ml per square meter. The scatter is also affected by the condition of the surface to be processed.

Why prime the walls before wallpapering, we figured it out a little. Now the question arises, what is the best way to do this. The answer suggests itself - a glue-like primer. It is one of the most unpretentious materials for any type of surface. Modern manufacturers also offer other primer compositions, which are selected depending on the specific surface. When choosing a composition, you should also take into account the conditions under which the room will be operated, at what temperature and humidity. But you need to start with wallpaper glue.

How to prime the walls before wallpapering, if the glue is not always suitable as a base for preparing the walls? There is a special adhesive composition, and whether it can be used as a primer is written in the instructions on the package. When purchasing glue, you must take this point into account. The same instructions will tell you how to use it and how to dilute it. In addition, the packaging usually indicates what area the container is designed for. You may need several packs for your walls.

How else can you prime the walls? Has proven itself perfectly acrylic material, which contains latex and acrylic, which increase adhesion by an order of magnitude. There are many types of acrylic primer available, and you can choose the one that best suits your wall type, space, and conditions. environment. This impregnation can also be used before gluing glass wallpaper and non-woven wallpaper. Acrylic impregnation works best on smooth walls treated with plaster. The advantage of acrylic primer is the absence of caustic, unpleasant odor, fast and deep penetration, ability to dry in as soon as possible– 4-5 hours, which will allow finishing work to be completed much faster.

What other primer could there be? If you have a question about wallpapering wooden walls, then preliminary application of an alkyd primer is recommended. The alkyd composition is well compatible with wood, it creates ideal adhesion after application. The coating dries within 15 hours. Another option is glyptal primer, intended for wood and metal. The disadvantage of this impregnation is long time drying time (days). There are also restrictions for application conditions - reduced humidity in the room. Thus, at least one layer of primer is a prerequisite for the durability of subsequent work. Pasting can be done only after the layer has completely dried.

Main stages of work:

1. the wall is cleared of the previous layer - in in this case from old wallpaper;
2. the surface of the wall should be leveled if there are bumps and roughness;
3. if the walls are not plastered, you will need plaster and screed;
4. cracks and holes need to be repaired;
5. all previous layers must dry completely;
6. The primer is applied as the last layer before wallpapering;
7. Impregnation is applied with a roller or brush.

How to control the process - aspects of the work

So, a primer is a must. The procedure itself will not give a 100% guarantee that the wallpaper will not peel off. It also depends on the quality of the wallpaper and the strength of the glue. But we can confidently say that failure to impregnate the walls with a primer will lead to the wallpaper falling off and the need for re-gluing. Priming must be preceded by other important preparatory work; they depend on the type of surface. For example, old walls need putty and screed. All cracks and holes in damaged walls are repaired and the area is leveled.

Drywall must be treated with putty without fail. You may be surprised, because the surface of drywall is already ideal. But the question is that you will want to change the wallpaper before the drywall loses its properties. In this case, you can remove the old wallpaper only by partially tearing off the drywall, that is, the surface will be damaged. If there is putty on top of the base, then it will be easier to protect the walls from damage. The final application of primer is the final chord, which will allow you to level the walls as much as possible, ensure the prevention of the development of dampness, bacteria, fungi, and guarantee the strength of the wallpaper's adhesion to the surface.

We select a primer depending on the type of wall surface and environmental conditions - temperature, humidity. Carry out work on applying primer only after the plaster has completely dried, and wallpapering only after the last layer of impregnation has dried. Drying times, composition and consumption of materials are described in the instructions on the packaging of a particular factory composition. You can use an adhesive for all walls, an alkyd base is good for wood, and a glyptal primer is also suitable for metal. If you have Smooth surface concrete wall, but its color is too gloomy, use a white putty before priming so that the gray color of the concrete does not show through the wallpaper.

You can save on primer by purchasing dry mixtures, but they must be diluted with water, observing correct proportions. Dry mixtures may not always be suitable for a particular surface. Moreover, preparation for use requires additional tools, it takes more time. It is more convenient to purchase ready-made formulations in liquid form. Then processing the walls will take less time.

Please note that the primer consumption is indicated per 1 square meter and is based on applying only one layer.

If you are planning two or three layers, you need to take this into account when purchasing the material. Another important point. Based on the consumption of the primer mixture, you can calculate which type will be the most economical. Perhaps the supermarket offers low price for a primer, but it is enough for a smaller area than a more expensive mixture. By carrying out simple mathematical calculations, you can estimate how many cans of one primer will be used to cover the area you are planning to wallpaper in two layers.

To perform priming, it is enough to purchase a suitable composition and a paint roller or brush. Application occurs over the entire surface. Carry out the work carefully so that every centimeter of the area is primed. After application, wait for it to dry (as indicated on the packaging), and you can begin gluing wallpaper of any type - paper, non-woven, glass wallpaper. By hanging wallpaper in accordance with the basic rules, you can enjoy the result for many years, saving time and not spending extra money. After all, saving on finishing works ah always leads to poor quality results and double costs for materials and workers.

With the advent of new building materials on the market, it became possible to improve the quality of repair and finishing work. The word “European-quality renovation” has entered our daily life, which means finishing of a special quality.

During construction, an ideal surface cannot be created immediately, so it is necessary to additional work related to improvement, repair, leveling, strengthening. This process is called internal and exterior finishing. Finishing includes installation and finishing work.

Installation work is the creation of a surface using various slabs: Chipboard, fibreboard, OSB, hardboard, slate, plywood, plasterboard, wood. And PVC material, ceramic tiles, etc. Finishing work includes plastering, putty, whitewashing, painting, varnishing, wallpapering. A very important component of finishing is the use of a primer.

The most important purpose of primers is to increase adhesion. “Adhesion” is translated from Latin as “sticking.” This connection occurs due to the adhesion of material molecules due to the chemical action of substances.

Primed surface improves adhesion dissimilar materials with base. It prevents mold from developing and prevents the formation of fungus, isolates the penetration of rust onto the surface, and reduces the consumption of paint and wallpaper glue. The use of a primer when gluing wallpaper increases the comfort and quality of work and reduces labor costs.

Materials used for finishing interior spaces, cannot do without mandatory impregnation. This is required by the wallpapering process.

The building materials market has big choice impregnating compositions for primers various surfaces. Their main task is to strengthen the foundation. But there are also additional functions.

For use with different materials There are several types that differ in their composition. Some of them are water-based. These are acrylic, latex, silicate and silicone primers. Others are made from gypsum, cement or lime. This natural materials. There are primers based on organic solvents. These are solutions with latex, alkyds or polyurethane.

The purpose of primers may be different, but most often they successfully replace each other. For example, a deep penetration primer combines both strengthening qualities and water-repellent and adhesive functions.

Insulating. They contain resins or oils, various types adhesives, which are film-forming substances. The waterproofing layer creates a moisture-repellent surface, which is especially important before wallpapering.
Anti-corrosion. Created specifically for metal, they differ in their effect on the material. When moisture comes into contact with metal, chemical reaction, the material begins to oxidize, which leads to rust. It has a negative impact on appearance premises, spoils the wallpaper. To avoid this, various types of anti-corrosion primers are treated:
1. phosphating primer containing orthophosphoric acid;
2. The passivating primer forms an oxide film. Under the influence of impregnation, the metal takes a passive chemical form, and the film protects it from moisture;
3. The protective primer includes zinc dust, which is destroyed when moisture gets on the metal, thereby protecting the material.

Universal the primer is an aqueous solution with the addition of chemical compounds. Penetrating deep into the surface, it increases the adhesion of materials and removes small dust particles. It is universal because it is used for various substrates and materials. Suitable for both indoor and outdoor use.
Antifungal primers prevent, and some formulations even actively fight, mold and mildew. At the same time, they fasten the surface and increase the adhesion of materials. They can also be used for preventive purposes.
Betocontact primers. They contain a filler in the form of quartz or marble sand. They are used for working with plaster or ceramic tiles. It is not suitable for wallpaper.

The characteristics of the primer are usually indicated on the product label or packaging:

what color is it. In general, primers do not change the color of the coating they are applied to when they dry. They are transparent. But there is a covering impregnation that paints the wall white. This happens due to the content of a large amount of pigmenting substances in it;
consumption per layer g/m2. This characteristic is needed to select the amount of material purchased. It also depends on the surface of application. If the amount of primer is slightly insufficient, and it is not possible to buy more, then the remainder of the solution can be diluted with the base on which it was made;
drying time. Each manufacturer is guided by the test indications of the product. The drying time indicated on the label will help not to disrupt the technical process;
type of material being processed. You can read on the label what type of surface this type is used for;
type of use. For interior or exterior work;
application method.

The remaining parameters can only be useful to narrow specialists.

The following types of primers are suitable for walls under wallpaper:

Acrylic. This universal impregnation is ideal for processing wood, concrete and brick walls. It is made on the basis of acrylic polymers, penetrates deeply into the pores of the surface and thanks to this it strengthens loose materials well. It has no pungent odor, dries quickly, is environmentally friendly and has low material consumption.
Alkyd. This impregnation has good anti-corrosion properties. In its manufacture, zinc and phosphate are used. It is environmentally friendly and is well suited for processing metal and wood, walls made of fiberboard, chipboard and OSB boards. Diluted with white spirit. Not suitable for working with drywall and plaster. Due to the content of pigmenting particles in it, it forms white surface. Can be used as a topcoat.
Latex. Suitable for any surface. Quick drying.
Mineral. Suitable for concrete, brick and plastered surfaces. It is made using cement, lime and gypsum.
Regular adhesive. The cheapest option.

For bare walls, use a deep penetration primer. These are walls made of foam and gas blocks, old lime and cement plasters. After applying the primer, it is absorbed into the base to a depth of 15 mm. Fills pores, holding the material together and forming a durable film that will ensure a high-quality connection with the finishing material.

Such walls absorb moisture well. Therefore, most often it is necessary to apply a second layer, which must be used to prime the surface after the first layer has completely dried.

The primer is always applied with a roller and brush. For large volumes of work, you can use a spray bottle, not forgetting about protective clothing and a respirator.

If No special requirements to the base, choose a universal primer. This is latex and acrylic water-based impregnations. They are cheaper than specialized compounds, dry quickly, are economical to use, and have no chemical odor. The use of such primers (primers) will provide all the requirements.

For wooden coverings choose alkyd impregnation. It hides resinous knots well and will not show through for a long time. It is suitable for fiberboard, chipboard and OSB boards, insulates iron substrates well.

For plastered, brick, concrete, and foam block walls, mineral and silicate impregnations are used.

The most common type of final (finishing) finishing of a room is wallpaper. During their existence, little has changed in the method of carrying out work. Only appeared additional elements preparatory work and the variety of wallpapers themselves has expanded.

Wallpaper comes in several types and types.

ordinary. These are paper and acrylic, they do not like moisture and mechanical stress;
waterproof– tolerant to water ingress;
washable– during operation, you can use non-aggressive cleaning agents in areas heavy pollution and a brush;
super washable- mainly different types vinyl wallpapers, moisture-resistant and wear-resistant.

According to the material and requirements for the quality of finishing of the base on which they will be glued:

Paper. They can be multi-layered or single-layered and show all the defects of the walls, so the base must be perfectly flat and uniform. The glue makes them wet and swollen. If the base is puttied with sandless sand and not primed, the wallpaper will pull it along with it and tear it out. An exception may be the overlap method.

To create one tone, pigmented impregnation is used. It creates a white surface that prevents areas of different colors from appearing on the wall. It is easier to work with it, since unpainted areas are immediately visible;

Non-woven. They are based on non-woven fiber made from cellulose or synthetic fibers. When choosing wallpaper, you need to pay attention to its density. They come in light, medium and heavy. The quality of the finish may not be ideal; their density may hide minor flaws in the base;
Vinyl. Thanks to the vinyl layer on the base, they can be used in rooms with high humidity. They are durable, fade-resistant, and washable. A relatively flat surface treated with pigmented impregnation is suitable for them;

For painting. A type of non-woven wallpaper. Because of what this wallpaper covers water-based paint, the base must be treated with a primer. If this is not done, the wallpaper will come off when painted;
Liquid. In fact, this is a subtype of plaster. The price of liquid wallpaper is quite high. To save money, it is advisable to make a smooth and durable surface using sandless plaster and cover it with a primer.

When there were only paper wallpaper, to change the interior it was enough to stick new strips of material onto the existing ones. This is how they insulated concrete wall. Sometimes newspapers were even pasted on for this purpose. Now there are many new types of wallpaper for every taste and with different properties. And the walls have become more diverse.

When carrying out repairs, old wallpaper is dismantled. It is most convenient to use a hand-held spray bottle with warm water and a spatula. If used wallpaper does not adhere well to the surface, you can make cuts on it sharp knife. Then water will penetrate under them faster.

Non-woven vinyl wallpaper can be removed in two stages. First, the vinyl covering is torn off, and then the remainder is wetted with water. Instead of water, you can use a vinegar solution. There are also special tools that help remove wallpaper.

In this case, it is not necessary to prime the surface, since the wall is already saturated with glue. The use of a primer is necessary for new surfaces.

Surface treatment technology depends on the wall material:

You need to clean it from dust. The cavities from fallen crushed stone and the joints between the slabs should be filled with putty and cleaned with sandpaper. You can use diluted glue to impregnate concrete.

To improve adhesion, it is preferable to use universal impregnation; mineral primer is also suitable for cement mixtures. For a high-quality result, the walls are puttied with sandless sand.

When the plaster is not new, it must be tapped in order to find out whether it has moved away from the base. In places where there are dull sounds, it breaks off from the base. These places are impregnated with a deep penetration primer. After drying, they are plastered.

If the plaster is old or crumbling, it must be strengthened with a deep penetration primer. Depending on the condition, apply two layers. When the base is strong, proceed in the same way as with a concrete wall.

The surface for wallpaper does not need to be treated. But it is still advisable to cover the drywall universal primer. It is not advisable to use PVA-based impregnation - the wallpaper will stick tightly to the base and will be very difficult to remove. Drywall seams must be puttied. The result is a surface of uneven color, which can appear through the wallpaper.

To avoid this, drywall is covered with a thin layer of putty to level the walls around the entire perimeter. After which the surface needs to be primed. A pigment primer will not hurt for this.

The paint is removed using a hair dryer and a spatula. You can get rid of it chemically. To do this you need to purchase special remedy, treat the surface with it and clean it with an iron brush. When using an angle grinder for these purposes, there will be a lot of dust, and grinder The sandpaper will immediately become clogged.

In order to properly prepare such a wall for wallpapering, you need putty. To do this, make notches on the wall using an ax, hammer or chisel. Impregnate the base with a universal primer.

After it dries, putty the mixture to level the walls. One layer of putty is enough for wallpaper. After the putty has dried, it is primed.

If it is not possible to get rid of the paint or use putty, proceed as follows. Before doing anything, the walls must be degreased. Old painted surfaces need to be roughened for better adhesion.. To do this, it is treated with sandpaper and impregnated with a universal primer.

Glue paintable wallpaper onto painted walls without additional processing it is forbidden. When applying paint, the moisture contained in it will not be absorbed into the wall. The wallpaper will begin to swell, the glue underneath will become wet and it will fall off under its own weight.

For these reasons apply alkyd primer. Metal and wood coated with varnish are pre-cleaned with sandpaper. The primer is applied in two layers.

For quality results interior walls putty with dry putties. The method of gluing wallpaper overlapping is a thing of the past, Nowadays all wallpaper is pasted end to end. To do this, create a perfectly flat surface.

Walls made of chipboard, OSB, plasterboard, cement and lime plasters, covered oil paint or alkyd enamel. The solution is applied to the walls and ceiling with a thickness of no more than 3-4 mm in several layers. For the first layer, putty with a larger grain size is used. Its task is to level the plane. Top with a final layer of fine grit to give the surface a perfect finish.

For work use two spatulas. One is for applying the mixture to the surface, the other is to dilute the solution and apply it to the first spatula. After applying the solution to the wall and Once dry, sand the surface with a paint mesh or fine emery cloth., fixed to the grout. Dust formed during rubbing is brushed off the wall with a broom or brush. It would be ideal to use a vacuum cleaner.

The putty surface is loose and absorbs moisture very well. It must be impregnated with a primer, which helps to bind the composition and saves the consumption of wallpaper glue.

In most cases, impregnation is sold in a liquid state, ready for use. But there are times when it has a concentrated consistency. This is done to save packaging during transportation.

This impregnation must be diluted before use. It is also available in powder form. The proportions for dilution are indicated by the manufacturer. Usually water is used for dilution, but there are cases when chemicals are used as a diluent. For example, alkyd impregnation can be diluted with white spirit.

Tsugunov Anton Valerievich

Reading time: 4 minutes

When starting an apartment renovation, you probably want to get the maximum result. Therefore, you should not neglect this important point, as a primer for walls before wallpapering. As real masters say, based on long experience, it is necessary to prime before each stage of finishing work. It is this procedure, which for many seems insignificant, that largely determines the quality and durability of your repair.

It is absolutely necessary to prime the walls before gluing heavy vinyl and non-woven wallpaper: the primer will strengthen the base, increase adhesion and prevent the glue, which in the case of non-woven material is applied directly to the wall, from being absorbed into the base.

Choosing a primer for walls

It is necessary to distinguish following types adhesive primers:

Acrylic.
Alkyd.
Glypthal.
Mineral.

Family acrylic primers Designed for most types of surfaces, including concrete, brick, wood, plaster and putty. They dry quickly, do not have a strong odor, and are better suited for drywall than others. Depending on the wall surface material, you can choose:

universal primer;
regular;
deep penetration composition.

Alkyd primers adhere better to wooden surfaces, glyphthalic ones are intended for metal, and mineral ones, containing cement and lime, are optimally suited for concrete and foam concrete.

Also, for priming walls, they use wallpaper glue mixed in a certain proportion, but here you should strictly adhere to the recommended instructions indicated on the packaging and take only products from well-known manufacturers.

Advice. Select a primer that matches the type of substrate and the type of wallpaper adhesive applied to the primed surface. The ideal option would be to use materials from one manufacturer or at least strictly follow its recommendations.

Preparatory work

Do-it-yourself priming of walls in an apartment under wallpaper is simple process, which everyone can do. But this does not mean that you can approach the matter carelessly. All stages of work, including preparatory work, must be performed in strict sequence.

The premises being renovated are completely cleared of construction waste.
The surface of the walls is carefully inspected. , plaster, nails and screws are removed. Cracks and chips are covered with fresh putty. It must be remembered that the primer is applied only to a dry base.
You should pay attention to dampness and mold that could appear in a damp room. Such places should be thoroughly cleaned with a chlorine solution, and a primer containing a fungicide should be used.

Do not neglect safety measures: primer mixtures contain chemical compounds that can cause allergic reactions, although the manufacturer assures on the packaging that they are completely safe. environmental safety product. Use a respirator or gauze bandage, glasses, a hat, gloves and clothing that covers unprotected areas of the skin in your work.

Use warm water to wash away dust and fine dirt from the wall remaining after treatment.

Important! The primer cannot be applied at room temperatures below +5 degrees, especially on a frozen surface.

Let's get started

The following tools should be at hand:

Bucket.
Paint bath.
Wide roller with a long handle.
Brush.

Now you can start priming the walls before wallpapering.

Pour the resulting solution into the bath, take a roller and carefully, without splashing, dip it into the dish, then slightly squeeze the pile of the roller on the grooved edge, this way the primer is used more economically.
We start processing from the bottom, leaving about 5 cm to the edge of the floor, so that random dust does not fall on the roller pile: it will significantly deteriorate the quality of the coating. Then you can carefully work on this part with a brush.
How to prime walls under wallpaper so that there are no gaps? It is more convenient to start from a corner, this makes it easier to control the density of application. Pressing the roller without excessive effort, we go from bottom to top. This prevents drops of primer from flowing down the wall onto the floor. We roll the roller several times from the bottom to the ceiling, making sure that the surface is well wetted and the primer layer lies evenly.
So, stroke by stroke, we go over the entire surface, marking the surface being treated with a noticeable darkening from moisture. This will truly indicate a properly primed wall.
When the main space is processed with a roller, there remain hard to reach places, such as corners between wall and floor, wall and ceiling, various protrusions, areas near sockets and switches. Here we carefully apply the primer with a brush, taking precautions.
Let the wall dry for 2-3 hours.

You can see all stages of work in more detail in the video.

Note: another way to apply primer is to use a spray bottle. Pros: ease of execution and saving on material. The solution does not spread and is applied in doses. Cons: excessive spraying over the entire wall area. The smallest suspension will remain in the air throughout the apartment for a long time and you will have to thoroughly ventilate the room several times.