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If you follow the technological maps on Finishing work(documents that indicate the sequence of actions), then you can observe the following: any finishing paint coat is applied to the prepared and putty surface. But there are controversial issues, for example, is it possible to glue wallpaper on paint? - yes, this can be done under certain conditions.
The previous coating must be firmly adhered to the plaster layer, and also free of dust, various dirt and other defects. Accordingly, the first stage is surface inspection. It is enough to run your hand over the layer old paint, as soon as it becomes clear where it is lagging behind, and where it holds firmly, then carefully clean these places with a spatula or scraper.
There are many compositions of paints, but is it possible to glue wallpaper on water-based paint? - yes, this is possible, provided that she holds on tightly. But there is a nuance: when the adhesive is applied to such a surface, it grasps with lightning speed, so it is worth pre-treating it with an acrylic dispersion primer, which will remove excessive water absorption. During priming, it can swell in places of poor adhesion - it's okay, you just need to take a spatula and clean them.
As for other surfaces based on oil paint, yes, it is also possible. However, you will have to resort to continuous mechanical processing, in addition to identifying and eliminating crumbling areas. The fact is that the oil compositions form a waterproof coating on the surface that is not able to absorb the adhesive composition. In order to ensure adhesion, the entire surface is treated with coarse sandpaper, thus many small scratches appear - pores into which the glue flows.
You can add 10% PVA glue to the starch glue composition, this will improve the tenacity, but it is best to buy ready-made polymer glue for such a case, with which you can also glue the wallpaper on the enamel paint after the above processing. Sometimes you can observe the implementation of a sandless coating on an oil surface or enamel, after which a new topcoat is produced.
It is highly undesirable, but you can still glue wallpaper on water-based paint. These paints include old casein glue rolls, as well as whitewash. In the first version, the surface should be checked, as always, and then carefully primed. If there is whitewash on the surface, then it will be impossible to glue the wallpaper on it, you will have to carefully wash it down to the ground (a primer will not help).
There are no special nuances about how to glue the wallpaper onto the paint; it is important to mark off the vertical marking lines of the first canvas on each wall, taking into account the unevenness of the corners. As always when performing wallpaper work, drafts must not be allowed during the day from the moment of gluing; if the surface was painted with oil paint or enamel, the drying time of the glue may increase by 2-3 times.
On a curved surface (oil or enamel), the wallpaper is very difficult to glue, the seams can lag and diverge, and to avoid this, you need to pull the sandless surface. In addition, if the wallpaper is for painting, then everything is even worse: they can peel off in places and disperse the joints during the painting itself.
You can also watch a video on how to glue wallpaper onto paint, but these techniques are not followed by technology.
The decision to carry out repairs does not come immediately. However, even then we try to delay this process until last moment, when the finish of all surfaces gradually begins to fade, and in some places even falls off. Therefore, in order to freshen up your apartment or house, it is often enough to carry out repairs "on a quick hand". And here a serious question arises, how to decorate the rooms in your house. At the moment, wallpaper is becoming more and more popular as it is inexpensive and the most effective method finishing of ceilings and walls. But what to do if old paint, applied a long time ago, remains on the walls, and how to glue the wallpaper onto the paint. This is possible subject to certain prerequisites.
In order to properly paste over the wallpaper, you need, first of all, to determine the type of paint with which the walls were painted. There are several types of paints. Acrylic water-based paint does not have a specific odor, has water-repellent properties, fits well on walls and is absorbed into them, fixing firmly in the structure.
Oil paint has a certain smell, perfectly repels moisture and forms a "protective layer" on the surface after drying. To understand whether it is possible to stick wallpaper on the paint and how to do it correctly, try to remove some of the paint from the wall with a spatula: the oil paint will fall off in pieces, the acrylic paint, on the contrary, adheres tightly and is removed only in small parts.
Old paint on the walls gives the owners a lot of not too pleasant moments, such as bald spots and cracks that appear when the paint material is partially peeled off along with the plaster, and all kinds of irregularities from sagging that remain from old random brush strokes, or just the color of oil paint, which pretty tired. And if the walls of the kitchen are painted with paint, then to these troubles it is worth adding the old rancid smell that has eaten into them.
Do not glue wallpaper on moldy or damp walls. It is absolutely not enough to treat these areas with an antifungal drug and simply dry them. It is recommended to definitely eliminate the cause that provokes mold and dampness. The most simple means it is considered fixing a piece of a rolled heat insulator on the wall, and then sticking a plastic mesh on it, plastering with a layer of dry mix, or simply covering it with a sheet of drywall.
When choosing wallpaper, it should be borne in mind that if there is a drawing or pattern on it, then the owners will have to dock it in such a way as not to violate the integrity of the pattern. Always buy more for one roll. Before sticking the wallpaper on the paint, it is recommended to carefully read the instructions for making the glue and follow strictly according to the points of its instructions. You cannot use glue that is not intended for the selected type of wallpaper, for example, bone.
It is customary to glue wallpaper, starting from the window. It is better to do this work together: in this case, one person will glue the upper part, and the second - the lower one. Having cut a strip of the desired length from the roll, you need to lay it up with the wrong side on the floor. With a brush, you should carry the glue, spreading it evenly over the entire surface of the wallpaper, and then pick it up from the floor, folding the ends of the strip together.
Paste wallpaper onto paint, drywall or old wallpaper from the top. The strip should be aligned with the ceiling and applied tightly to the wall. With movements that resemble the shape of a herringbone, you should press the wallpaper tightly against the wall from the middle of the strip - to the edges and down. This is best done with a cloth or roller. You can also use a rag to remove excess glue that has come out at the edges.
The next strip needs to be glued in the same way, but taking into account the image of the wallpaper. The strips should be attached end-to-end to each other, but not overlap. With a rag, you need to go over the joints again in order to fix them well. Switches and sockets must be pasted over with wallpaper, and immediately cut with a construction knife or blade crosswise in two lines. Then, the excess should be carefully trimmed around the perimeter of the switch or outlet.
Under the window openings and above the door, wallpaper is glued after all solid stripes have been glued. Is it necessary to glue the wallpaper on the walls where the furniture set will stand? You should act at your own discretion. If there are plans to rearrange the furniture in the future, then, of course, the wallpaper should be glued. It is strictly forbidden to use hot glue, because its consistency becomes liquid, which is the reason that the adhesive begins to protrude beyond the edges of the canvas, staining front side wallpaper.
To glue the wallpaper on a water emulsion, you must first prepare the walls, otherwise the canvas can quickly lag behind the surface. First of all, you need to neutralize the old paint layer. For this, it is customary to prepare a mixture of primer and solvent in a 1: 1 ratio and apply this composition to the surface to be treated. The solvent included in the mixture corrodes the old coating partially, allowing the primer to penetrate into the structure of the walls and provide reliable connection new finish.
After that, the wall must dry, and only then a layer of clean primer can be applied on top. This method results in a rough surface, which is necessary for good adhesion of the wallpaper to the surface. After drying, the wallpaper is directly pasted onto the paint. For these purposes, it is necessary to prepare a special composition, which consists of equal parts of wallpaper glue and PVA. It should be applied to wallpaper and a primed wall.
Oil paint is a very tenacious substance that can keep up with walls for years. But in this case, the whole difficulty lies in the fact that the layers of paint have a very smooth surface, which makes it difficult to achieve good adhesion of the wallpaper to the wall. Based on this, when planning to stick wallpaper on oil paint, you also need to make preparatory work... There are two methods for preparing oil-painted walls.
The first is as follows. To get a surface suitable for pasting, you should treat the walls with coarse emery, apply a mixture of primer and PVA glue in a ratio of 1 to 1 to the sanded surface.
The second method is as follows. Using a spatula, every twenty centimeters, it is customary to remove a layer of paint with horizontal stripes, which is 5 centimeters wide, and then apply putty on the treated areas to align them with the rest of the surface. These strips are designed to ensure good adhesion of the curtain to the walls. This method of gluing wallpaper on oil paint is considered less effective, but it also has a right to exist.
It is not worth repeating how to glue the wallpaper on the paint - the sequence of actions is the same. The only difference is the composition of the adhesive solution - when gluing wallpaper on oil paints, wallpaper glue should be taken 2 times more than PVA glue. By following these steps, you will get a good result. The wallpaper will hold tightly, delighting the owners with their appearance.
You already understood that water-based paint can be washed off with warm water using a rag. But there are other finishing materials as well. For example, the situation is more complicated with whitewashing, because this material is not able to withstand any stress. If you plan to glue the wallpaper on the whitewashed walls, remember that the whitewash will have to be removed completely. To do this, slightly soak it with soapy water, and then remove with a spatula. Rinse off the remains with warm water using a sponge. You cannot leave the slightest area that has been treated with whitewash.
It is very easy to check the opposite. It is enough to run your palm along the wall with your palm and analyze the result. If there is even a little chalk left on your hand, you will have to wash the wall again and remove the last traces of whitewashing. Without doing this, you can not tackle wallpaper pasting - all efforts will be in vain. Eventually, the wallpaper will come off where the paint has remained, and bubbles will appear if moisture appears there.
The second option for preparing whitewashed walls for wallpapering is to treat the surface with a primer twice, which is different deep penetration and dry each layer well. After that, you should prepare the glue diluted with water. The water content should be 20%. It is customary to process the walls with this composition, then you need to wait for the substance to dry completely and you can glue the wallpaper.
But if the surface was painted with enamel, then in this case it will turn out to glue the wallpaper directly onto the walls. But you must first make sure how firmly the paint substance adheres to the wall. You need to remove the enamel in those places where the substance falls off by itself. Be sure to go over the entire surface with coarse sandpaper and remove dust from the wall. For greater strength, it is recommended to pre-paste the surface with a special impregnation for walls.
Since we are talking about how to glue wallpaper onto paint, and we are talking about non-standard surfaces, then we should definitely mention an ordinary concrete wall, which can act as a basis for wallpaper. Many developers are interested in how to glue wallpaper onto concrete. Of course, it seems superfluous to carry out preparatory measures.
However, it should be noted that wallpaper, especially expensive natural and fabric wallpapers, are very demanding on the evenness of the walls, and concrete walls represent a surface that is completely covered with tubercles and ridges. Therefore, in this case, we cannot talk about the quality of work.
For the preparation of concrete surface it is customary to level it with a brick for pasting in order to smooth out the main irregularities. After that, it is time to sand the base with sandpaper and remove dirt and dust. After drying, the walls must be plastered and primed with a high-quality composition that meets the necessary technical parameters.
The primer must have good properties moisture resistance, provide protection against mold and mildew and, of course, firmly fasten the wallpaper to the surface. Wallpaper glue performs approximately the same functions. Wallpapering on concrete walls can only be done in rooms with low humidity and a complete absence of drafts.
To find out if it is possible to glue the wallpaper on the paint without preparing the walls, first check the walls for strength. To do this, you need the simplest construction tape, you need to attach it to the wall, which is painted with paint, after that it should be torn off with a sharp movement from the wall. If the paint material remains in place and no change has occurred, then the paint can be assumed to have passed the test.
But when particles of paint remain on the inside of the tape, then such a coating will have to be completely cleaned off. This will take a long time, so you need to be patient. In this case, clean the paint with a special metal brush, which is set on a drill, or with a spatula. Solvents are rarely used because of the harmful odor produced by the chemical.
On a wall that has passed the tape test, the wallpaper can be glued without preliminary surface treatment, because the paint created a strong, smooth and sufficient flat surface... Sometimes, in order to achieve a rough surface, craftsmen process the paint with sandpaper. Remember in the end that you should not stick light thin wallpaper on dark paint, because dark color will be visible through the new finish, completely ruining appearance rooms.
Now you have figured out how to glue wallpaper on paint, and are ready to put your knowledge into practice. Each room in your home should have its own face and its own unique look, therefore, you should competently approach the choice of wallpaper and their further sticker. Proper preparation of the walls for the subsequent wallpapering is a troublesome and rather expensive procedure, but highly desirable. You need to approach work with all responsibility, and then the residents of your house will be able to enjoy the result. The updated design will last a long time.
The simplest and cheapest way to renovate a room is to use wallpaper. When doing repairs on your own, often under decorative coating painted surfaces are detected. And the question immediately arises whether it is possible to glue the wallpaper on the paint. The decision will depend on the type of paintwork, the condition of the walls and the skill level of the builders.
Surfaces can be coated different kinds paints, the most common of which.
Determination of the type of paint - important point in choosing a method for preparing the base.
Oil coatings form a smooth water-repellent layer on the surface, which is removed from the walls and ceiling in layers with a spatula.
Acrylic paint, unlike oil paint, is odorless, penetrates deeply into the surface and forms a strong adhesion. Possesses high moisture resistance.
Water-based formulations are similar to acrylics, but can be washed off with water.
A layer of whitewash is easy to recognize by running your palm over the surface: if a trace of chalk remains on your hand, it means that the surface is whitewashed with a lime composition.
Despite the fact that at different types dyes have their own subtleties in the preparation of walls, the following procedures are common to all:
How the glued wallpaper will "sit" largely depends on how the painted walls are prepared.
A feature of walls painted with oil paint is a smooth glossy surface, on which it will be problematic to glue the wallpaper due to poor adhesion to the base. Therefore, it is necessary to create a porous, rough surface.
If the surface is small, then you can use a special wash. Both methods are accompanied by the release of a characteristic chemical odor, therefore it is necessary to carry out work in ventilated areas.
As a rule, the oil composition adheres firmly to surfaces, and if painted with it large areas then such paint stripping methods are very time consuming and unsafe.
There are several less labor-intensive and more safe ways preparation of surfaces painted with oil paint:
After creating roughness, dust is removed from the surface, it is primed and dried for 24 hours. Then they are putty with gypsum-based compounds, and after drying, they are sanded with a fine-grained emery mesh and primed again.
When deciding whether it is possible to glue wallpaper on acrylic paint, it must be borne in mind that the surface of the walls painted with acrylic compounds is matte and does not need additional processing to roughen. To increase adhesion, the wall must be treated with a primer solution and solvent in a ratio of 1: 1... The solvent partially corrodes the paint, promotes the penetration of the primer into the base structure and ensures a strong bond with the wallpaper.
Acrylic finishes include:
Unlike acrylic, this type of paint is not moisture resistant, so it should not be used on walls. Under the influence of moisture contained in the glue, the layer of water-based emulsion does not hold the wallpaper and peels off from the base together with them.
Preparatory work consists of the following operations:
The whitewash must be removed from the surface, since when interacting with glue, it lags behind the base and is not able to hold even light paper canvases.
There are two ways to remove limescale.
First way:
After all the manipulations, it is necessary check the quality of processing: run your palm over a dry surface, and if a chalk mark remains on your hand, then you need to rinse the wall again. Lime will negatively affect the quality of wallpapering - bubbles or peeling of the canvases may form.
Second way:
Sometimes, according to the technology, gluing is allowed without prior preparation. An important condition for this is a solid, reliable base.
To inspect the condition of the coating, you must:
After preparing the base, proceed to the selection of glue and wallpaper.
For upholstery work, glue of the Moment, Methylan, Bustilat or PVA brands is used.
"Moment" and "Methylan" adhesives are produced in the form of a powder, they must be diluted with water, strictly following the instructions. Bustilat and PVA have the consistency of sour cream and ready to use.
To improve adhesion to the base, PVA is added to the liquid wallpaper glue:
When choosing wallpaper, it is necessary to take into account that the bases covered with paint will not be able to hold heavy canvases, therefore it is better to refuse vinyl and other dense types.
If you plan to glue thin wallpaper, then the walls must be completely plastered in order to exclude the transmission of dark areas.
Non-woven or paper wallpaper require absolutely flat walls, since thin materials when glued will completely repeat the relief of the walls.
If the design provides for "liquid wallpaper", then, when preparing the walls, they must be painted over with white paint to eliminate the unevenness of the surface color.
Since the wallpaper is glued on painted walls(after preparing the latter) it is possible in the same way as on other surfaces, then to obtain a high-quality finish, you must follow simple rules:
Answering the question of whether it is possible to glue wallpaper on painted walls, it is necessary to take into account the condition of the surfaces and labor intensity of work... And if you take into account all the subtleties, the wallpaper will lie flat and securely.
Wallpaper remains one of the most popular finishing materials. To ensure good adhesion of the surface, it must be prepared before gluing the rolls. However, often the walls are covered with a layer of old paint, which is not always easy to remove. We will tell you how to glue wallpaper onto paint in this article.
In order to glue the wallpaper with high quality, it is important at the very beginning to decide on the type of paintwork.
There are two most common types of paint:
To answer the question of whether wallpaper can be glued to paint, you need to have an idea of the hardness of the coating. All paint that is easy to remove must be removed, otherwise there is a risk that the painted layer will later fall off along with the wallpaper.
To check the strength of the paint, it is enough to dig deeper into the old paintwork with a spatula. Oil paint peels off in whole layers, but acrylic paint holds much stronger and is removed in small pieces.
Sometimes it is difficult to determine the type paint material, but at the same time there is a need to glue the wallpaper on the paint without priming the surface.
To complete the work, you will need the following materials and tools:
The best quality result can be achieved only by applying a primer to the paintwork. After treating the surface with a primer, apply a layer of putty to level all the unevenness.
Over the years, the old coating absorbs all kinds of unpleasant odors... This is especially true in the kitchen and in rooms where people smoke a lot. Walls in damp rooms are often affected by fungus or mold. It is not recommended to glue rolls on such surfaces without preparation.
First of all, we process the surface special means(for example, an antiseptic composition). Before gluing the wallpaper onto the paint, you can do the following:
Regardless of the type of coating, when gluing wallpaper, it is recommended to adhere to a number of general principles:
Before gluing the wallpaper onto the paint, we prepare the surface. To do this, we apply a mixture of primer and solvent to the wall with an old paint and varnish layer. Such a composition will allow you to change the structure of the painted surface, forming small defects on it. Such depressions will improve the adhesive properties of the coating, so that the wallpaper will adhere better to the wall.
When the wall is dry, we process the surface again, but this time only with a primer. A layer of highly diluted adhesive can be applied. We start gluing the rolls only after the surface has completely dried.
Despite the fact that, as mentioned above, oil paint can chip off in layers, it is a very tenacious material. In addition, oily coatings are very smooth, which seriously impairs their adhesive properties and complicates the gluing of rolls.
We glue wallpaper on oil paint only after preparatory measures. There are two methods of gluing wallpaper on coatings treated with oil paint:
Note! In the case of oil paints, it is recommended to use twice as much wallpaper glue as compared to PVA glue.
So, the wallpaper can be glued onto a layer of old paint. However, preparatory measures cannot be completely dispensed with, since otherwise it will not be possible to glue the wallpaper to the wall with high quality.
Wallpaper like finishing material, appeared in wide use in the second half of the twentieth century and since then their popularity has only grown. For repairs on " hastily" this is the best option... But in old houses painted walls are sometimes found, and many are interested in how to stick wallpaper on paint with their own hands so that they hold securely.
The classic instruction says that under the wallpaper or under the putty, the paint must be removed completely. But from experience we can confidently assert that the wallpaper adheres well to the paint, only before gluing the wallpaper to the paint, the surface must be prepared in a certain way. There are several ways to prepare and each of them is quite accessible for doing it yourself.
Tip: If there are minor scratches, chips or irregularities on the plane of the wall, then it is better to use thick, heavy vinyl wallpaper.
Their price is slightly higher, but with their help you can hide all defects and do without putty.
Advice: when working on oil paint, in order for the canvas to hold more reliably, experienced craftsmen advise adding to wallpaper glue some PVA. Depending on the density of the canvas, it can be diluted in a ratio of 1: 3 or 1: 5.
The video in this article shows general principle pasting wallpaper.
In conclusion, I would like to note one more important detail... Regardless of what basis you are gluing the wallpaper, from the time you started work until the time when the walls are completely dry, the windows should be closed in the room and there should be no drafts. Otherwise, no matter how hard you try, the wallpaper will fall off.
