We make high-quality repairs: we select a primer for the walls under the wallpaper
Many in the beginning renovation are wondering if a primer is really needed for the walls under the wallpaper. Which one to choose? How to apply? The questions are important, they need to be worked out in detail, therefore the homemaster.techinfus.com/en/ editorial staff offers you ready-made answers and recommendations.
To prime? Be sure to prime
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The content of the article [Hide]
- 1 The most important question: is it necessary to prime the walls before gluing the wallpaper?
- 2 Question number two: what kind of primer can be used before wallpapering
- 3 We figure out which primer is better for walls under wallpaper
- 4 Stages of priming the walls before gluing the wallpaper: preparation and process
- 5 How long after applying the primer can wallpaper be glued
- 6 How much is a primer for walls for wallpaper: price overview
- 7 Video: how to prime walls
The most important question: is it necessary to prime the walls before gluing the wallpaper?
Is it necessary to prime the walls before wallpapering? Rarely can a subfloor demonstrate perfect flatness and smoothness. Any roughness can seriously spoil the impression after the completion of all finishing work.
The primer removes various imperfections and makes further finishing more durable and durable
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And here are the answers to the question whether it is necessary to prime the walls before gluing the wallpaper:
In such a room, a more pleasant microclimate develops, therefore, there are only one advantages from processing.
Related article:
Question number two: what kind of primer can be used before wallpapering
How to choose a wall primer for wallpaper? In a hardware store, it is quite easy to get confused, since the presented assortment of this tool simply dazzles.
The walls are treated with acrylic, alkyd, universal, latex, glyphtal, mineral primers and even wallpaper glue.
Acrylic and alkyd compounds
The most popular is an acrylic primer for wallpaper. She works great with putty, plaster and concrete, regularly performing all her tasks.
You should not immediately buy a composition labeled "under the wallpaper", this refers to a marketing ploy
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Most likely, you will be presented with highly diluted PVA glue at a high price. A good primer consists of a mixture of acrylic polymers, the word PVA should not be there. Consumption of funds: 100-200 ml per 1 m². The number is variable, since the porosity of the walls is different everywhere.
Alkyd primers resemble paint, as after their application a film appears on the surface. Such soils are good for wood and concrete surfaces. They fill the pores of the top layer. As a result, the wood does not swell, and moisture does not penetrate into the concrete.
After applying alkyd mixtures, the surface becomes moisture resistant and resistant to attempts to colonize mold and mildew.
You can use this type of primer as a base for subsequent treatment with latex or acrylic, or acrylic paint.
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The alkyd primer does not penetrate deep into the walls, but it can perfectly prepare the surface for further work. This primer is good for covering reinforced concrete structures.
But surfaces with plaster, plaster or drywall not particularly well fixed with alkyd primers.
The consumption of the product is about 100-150 g per 1 m².
Latex and mineral primer
Latex has a number of beneficial properties, such as strength, elasticity, water resistance, compression and elongation resistance. Now a primer has similar qualities - on the basis of latex there is a primer, which, after drying, forms a film that allows to increase adhesion.
The product will apply to the wall evenly and dry quickly
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The purpose of such a coating is to strengthen loose surfaces that are prone to collapse. In addition, the waterproofing of the walls will significantly improve.
This primer is ideal for precast concrete or fiberboard panels, natural stone and wall plastic. This is an excellent solution for rooms with high humidity levels. Large consumption: 300-500 g per 1 m².
Mineral primer consists of lime, cement and gypsum. This composition is suitable for concrete, bricks, expanded clay concrete blocks, plastered walls.
The package will indicate for which surface the proposed composition is used.
Glyphthalic and perchlorovinyl primer
If the wallpaper must be glued in a garage, shed, on a wooden or metal surface in a room with a low humidity levelthen buy a glyphthal primer.
The smell of the composition is specific, the coating dries out for a day
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Perchlorovinyl soil is used to treat wood, brick, metal and concrete both inside and outside. The mixture is not afraid of temperature changes, it is also quite resistant to humidity, and the coating dries for 1 hour at + 20 ° C.
Universal primer
The very word "universal" will tell you a lot. It is a compound of acrylic copolymers, to which resins are also added. The primer is diluted with water and an excellent product with a deep penetration effect is obtained.
Walls with such soil can be processed in any room and outside the house. Thanks to the use of this composition, resistance to various influences increases, and the shelf life of the decorative coating will be increased.
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The consumption is small, 100-120 g per 1 m².
Wallpaper glue
Someone just smears the walls with glue (on casein) for non-woven and other wallpapers and is satisfied.But such job satisfaction will only be temporary - defects will still manifest themselves. This is because there are no useful properties in this processing.
Wallpaper glue is best used for its intended purpose.
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Related article:
We figure out which primer is better for walls under wallpaper
The choice is great. Therefore, the question immediately arises: what kind of primer to treat the walls before gluing the wallpaper?
To understand this, let's ask ourselves which surface needs to be processed and which wallpaper will be glued. For example, a primer under liquid wallpaper should be white or colorless, moreover, deep penetration. If the surface on which the material will be glued is very smooth, you need to take a primer with quartz sand to improve adhesion.
A good primer will fill the pores and help spread the adhesive as evenly as possible. As a result, the wallpaper will not lag behind the walls, bubbles and visible defects will not form
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Judging by consumer reviews, it is best to take white soil under the wallpaper. It should have properties such as high penetration and a short drying time.
Adhesive property, surface hardening and antiseptic properties should be indicated
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Stages of priming the walls before gluing the wallpaper: preparation and process
We found out how to prime the walls before gluing the wallpaper, we bought everything. What's next? And then we start the working process.
Preparing walls for priming: removing old wallpaper
There is usually some kind of coating on the walls that needs to be removed. If it is old wallpaper, then it is easier to remove it by prying it with a spatula. The disadvantage of this work is that not only wallpaper pieces are removed, but also layers of putty and plaster.
You need to remove the wallpaper completely
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The second method is to wet all surfaces with soapy water 2-3 times. The wallpaper sheets will move away from the walls by themselves and can be easily removed. This method is not quick, the whole process takes about one day.
You can just buy a ready-made wallpaper remover
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After removing the old coating, you need to wash the walls and walk over them with a spatula. If mold or mildew is noticed, treatment with special compounds is needed. If the plaster does not crumble and does not have cracks, you can start priming.
Whitewashing from the walls is simply washed off with water
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How to properly primer walls before wallpapering: the nuances of applying primer to different types of surfaces
The first thing to consider is the room temperature suitable for the job. The range is wide: from + 5 ° C to + 30 ° C. Air humidity should be 75%.
When working, use a brush, roller, telescopic handle, soil tray, stepladder and a number of aids
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The solution is made according to the instructions; a construction mixer or drill will serve this purpose best. But even by hand, the compositions are well mixed.
The primer is collected in a tray and from there applied to a roller or brush. The liquid must not run off or spray on the sides.
The walls are coated carefully, leaving no streaks or flowing streams of material
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After processing, wait 2-3 hours and apply a second layer.
The nuances of priming plastered walls before gluing wallpaper
First, they prepare the wall: if it has only recently been plastered, wait 3-4 days until the coating is completely dry.
The wall is covered with soil from top to bottom, a telescopic handle will help here. As soon as the first layer is applied, you need to check if there are gaps and process them.
After a few hours, the second coat can be applied. As soon as it dries, a third is applied.
How to primer drywall before wallpapering
Drywall is no exception - this surface is also treated with soil. The process must begin before sealing the seams. The joints are coated with maklavitsa, so the composition will penetrate to the profile.
An important point: before priming, you need to tear off the protruding pieces of paper from the cuts
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Painted walls
Painted surfaces need to be cleaned: if it was a water-based emulsion, then it is removed with a spatula, moistening the walls with soapy water. Enamel and oil paints cannot be easily removed - they are cleaned off where there is already damage to the layer. Then everything is cleaned with coarse-grained sandpaper.
Wood and metal
Wooden walls must be primed: this will protect the material, seal it and prevent the wallpaper from deforming. If the tree is fresh, remove the resin with a heat gun and sand it with sandpaper.
The wood surface must be completely dry and clean. Suspicious places are pre-treated with a nitro-solvent.
Metal can also be primed to protect it from corrosion. This will save on paint. Before priming, it is cleaned of rust and degreased with a solvent or ethyl trichloride.
If there is a layer of old paint, it is matted with sandpaper or removed.
How long after applying the primer can wallpaper be glued
And when can you glue the wallpaper after priming the walls? This is also a very important question. Consider how long different formulations dry. Universal and acrylic mixture dry for 4-8 hours, and products with the inclusion of quartz dust dry out in a day.
In the case of a "quick-drying" compound, 6 hours after the completion of the finishing process, you can start gluing.
Alkyd primers dry in 10-12 hours
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If the wallpaper is glued to plastered walls, then such a surface is ready within 3 hours after priming, and if we are talking about plastered surfaces, it is better to wait 8-12 hours.
How much is a primer for walls for wallpaper: price overview
Consider how much popular types of wallpaper primer cost.
| Illustration | Name | Price (as of July 2019), RUB |
|---|---|---|
 | Primer "Optimum for wallpaper" 10 kg | 479 |
 | Oscar, deep penetration, Gos-10 kg | 800 |
 | Priming paint Pufas Grundierweiss (GK) 15 kg | 950 |
 | Universal primer TEK Gruntoff penetrating acrylic 10 l | 178 |
 | Pullex Renovier-Grund Pigmented Wallpaper Primer | 1311 |
 | Antiseptic primer deep penetration 10 l | 500 |
Repair everything correctly!
Video: how to prime walls
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