Primer of the walls before wallpapering: how to process the walls

Starting repairs in the apartment, you probably want to get the maximum result. Therefore, do not neglect such an important point as the primer of the walls before wallpapering. As the real masters say, relying on long experience, they must be primed before each stage of finishing work. It is this procedure, which for many seems insignificant, largely determines the quality and durability of your repair.

So, why primed walls before wallpapering? Briefly tell the essence:

1. Adhesion (adhesion) between the layers of the base - brick, plaster, putty - on which the wallpaper is held, increases, preventing these layers from cracking and breaking prematurely.
2. The penetration of moisture into the base is prevented. The primer acts as a film, preventing the absorption of water from wallpaper glue, moisture from the air.
3. The primer removes dust from the surface, seals cracks and pores, which is important for high-quality wallpapering.
4. The wall is protected by special types of primers from mold and fungi, pests and insects, which can wound up under the wallpaper.
5. Finally, money is saved because less glue is spent.

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

Choosing a primer for walls

Work begins with primer selection. The question arises: how to prime the walls in the apartment before wallpapering? Previously, craftsmen could process the walls before gluing the wallpaper with ordinary PVA glue or wallpaper glue diluted in water. And until now, unscrupulous manufacturers under the guise of a primer in solid containers sell such a product. This option of wall treatment is acceptable, but in this case, you can dilute the glue yourself, and not buy a product that is definitely not worth the money for which it is offered.

If you want to use a specialized primer, you should purchase a certified product, in containers, where the name of the manufacturer, composition, characteristics, terms are clearly and clearly indicated on the label storage. It is better to spend a little more than to get a poorly finished coating.

The following types of adhesive primers should be distinguished:

• Acrylic
• Alkyd.
• Glifthal.
• Mineral

The acrylic primer family is designed for most types of surfaces, including concrete, brick, wood, plaster and putty. They dry quickly, do not have a pungent odor, are better suited for drywall than others. Depending on the material of the wall surface, you can choose:

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• universal primer;
• regular;
• deep penetration composition.

Alkyd primers are better placed on wooden surfaces, glyptal primers are designed for metal, and mineral, containing cement and lime, are optimally suitable for concrete and foam concrete.

Also, for wall priming, wallpaper adhesive mixed in a certain proportion is used, but here it should be strictly adhere to the recommended instructions indicated on the packaging and take only products known manufacturing companies.

Tip. Choose a primer that is suitable for the type of base and type of wallpaper glue applied to the primed surface. The ideal option would be to use the materials of one manufacturer or at least clearly follow its recommendations.

Preparatory work

The priming of the walls in the apartment under the wallpaper with your own hands is a simple process that everyone can do. But this does not mean that the matter can be approached through the sleeves. All stages of work, including preparatory, must be carried out in strict sequence.

• The repaired building is completely freed from construction waste.
• The surface of the walls is carefully inspected. Remains of old wallpaper, plasters, nails, screws are taken out. Cracks and chips are covered with fresh putty. It must be remembered that the primer is applied only to a dried base.
• You should pay attention to dampness and mold, which could appear in a humid room. Such places should be well cleaned with a chlorine solution, and the primer should be used with a fungicide content.

Do not neglect safety measures: the composition of primers includes chemical compounds that may cause allergic reactions, even though the manufacturer assures on the packaging of complete environmental safety product. Use a respirator or gauze dressing, goggles, headgear, gloves, and clothing covering exposed skin.

• Wash off dust and fine dirt from the wall remaining after processing with warm water.

Important! The primer must not be applied at room temperature below +5 degrees, especially on a frozen surface.

Getting to work

At hand should be such tools:

1. Bucket.
2. Paint bath.
3. Wide roller with a long handle.
4. Brush.

Pour the primer into the bucket and mix thoroughly. If the mixture is concentrated, we dilute it with water to the desired condition, following the instructions on the label, taking into account your type of wall. The first layer (and there will be at least two) is diluted thinner, so that the solution is deeper absorbed into the wall and firmly bound the treated surface.

Now you can start priming the walls before wallpapering.

• Pour the resulting solution into the bath, take the roller and carefully, without spraying, dip it into the dishes, then slightly squeeze the pile of the roller on the corrugated edge, so the primer is used more economically.
• We start processing from the bottom, leaving about 5 cm to the edge of the floor so that accidental dust does not fall on the pile of the roller: it will significantly degrade the quality of the coating. Then with a brush it will be possible to accurately process this part.
• How to primer the walls under the wallpaper so that there are no gaps? It’s more convenient to start from the corner, it’s easier to control the density of the application. Without excessive efforts pushing on the roller, we go from the bottom up. So the primer drops do not flow down the wall to the floor. Several times we carry out a roller from the bottom to the ceiling, making sure that the surface is well wetted and the primer layer lies flat.
• So, smear after smear, we pass the entire surface, marking the surface to be treated with a noticeable darkening from moisture. This will correctly indicate a properly primed wall.
• When the main space is treated with a roller, inaccessible places remain, such as the corners between the wall and the floor, the wall and the ceiling, various protrusions, areas near sockets and switches. Here, gently apply the primer with a brush, observing safety precautions.
• Let the wall dry for 2-3 hours.

In more detail, all the stages of the work you can see on the video.

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Note: another way to apply a primer is to use a spray gun. Pros: ease of execution and material savings. The solution does not spread, it is applied dosed. Cons: excessive spraying over the entire area of ​​the walls. The smallest suspension will be in the air for a long time throughout the apartment and you will have to carefully ventilate the room several times.

The final stage of the primer walls

The second coat of primer is applied with a more concentrated and thicker solution. The whole process is carried out in the same sequence. Since the base has already been strengthened and waterproofed with the first layer, for the second one, instead of the primer, you can safely use wallpaper glue in a more liquid state than for gluing.

At the end of the primer, when the wall dries well, you can begin to paste over it with new beautiful wallpaper.

Little trick

To make sure the quality of the primer applied, professionals drip water onto the wall: if a drop flows down the wall rather than spreading out with a stain, then everything was done correctly.

You can understand all the subtleties of the process by watching a video on how to properly prime the walls before wallpapering.

It is important to remember that it is necessary to apply a primer before each stage of finishing work, whether it is applying plaster or wallpapering.