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How to make a smooth outer corner of a wall with plaster. How to plaster wall corners: basic recommendations from experts. Plastering rounded corners of walls

Plastering the corners is the most difficult. Especially when the angle is not straight and you cannot apply the template.

How to plaster corners different options, we will look at it today. Also in the video in this article you can clearly see all the work and then do it correctly.

Rules for performing work on plastering corners

Plastering corners with your own hands is not that difficult; here you just need to be careful and take your time. After all, the angle must be drawn so that it has the correct geometric shape.

The price of such work is high if you invite craftsmen. How to plaster corners: the video will show you how to do the job yourself.

Preparing the plane

Plastering the corners with your own hands should begin with preparing the base plane. After all, the fit of the material and its service life will depend on this. This work is done the same way, regardless of whether it is an internal or external corner.

So:

• First of all, the previous coating is removed. If this is a ready-made corner.
• Now we need to check the deviations. This is done using a construction square.
• If your angle is not straight, then just look at its deviations along the plumb line. Or it is quite possible to use fishing line. We stretch it and see what layer needs to be applied.
• If the layer is more than 2 cm, then it is better to make a corner using drywall. If less, then it’s quite possible to plaster.

Attention: Before applying the material, be sure to apply a layer of primer. It's better to apply deep penetration.

Making internal corners

Plastering surfaces with corners involves finishing internal corners two types: finishing of the internal corner adjacent to the facing surface, and finishing of the corners not adjacent to any other surface. In other words, we mean full-fledged corners that require plastering of two surfaces.

So:

• In the first case, when it is necessary to plaster only one surface of the inner corner, the solution is poured in the usual way. The solution is leveled using a rule in the direction from the corner to the wall.
• After leveling the solution, you can begin to form the corner. To do this, take a trowel or grater and place it on the inner corner at an angle of 30-40 degrees and begin to rub the corner with up and down movements.

Attention: In this case, the edge of the float should be pressed against the facing surface, and the working part of the float should be on the surface of the plaster.

• During movements, you should choose the optimal pressure on the grater so that the excess layer of plaster is removed, but it is impossible to remove all the plaster.
• When this layer has set, you can cover it to complete the corner.
• Finish finishing the corner using a foam or wooden float, making circular movements. As a result of this work, the surface is smooth, without pits and tubercles.
• Finally, a few wide up-and-down movements should be made to finalize the angle. In this case, the grater should be pressed tightly both with the working side to the surface being processed and with the edge of the grater against the facing surface.

Finishing external corners

Plastering the external corners will be slightly different from the internal one. You can also get smooth and high-quality external corners in two ways.

So:

• One method involves forming an outer corner using a metal perforated corner. The use of such a profile allows you to obtain a high-quality and reliable angle with minimal movements.

When carrying out rough finishing works, the question arises of how to plaster the corners of the walls. These areas are quite difficult to process. Therefore, the technology and premises of the building have its own nuances and characteristics.

First of all, it is necessary to carefully prepare the surface of the walls. During the work itself, the main condition for its quality is the creation of an absolutely even corner joint.

Some points to consider

Before you draw out the corners when plastering, you should take into account that there are two methods for aligning them.

The use of these methods depends on the subsequent .

1. If it is ceramic, porcelain stoneware, clinker tiles, wallpaper with an abutting pattern, then the corners must be exactly level.
2. When the walls are painted, covered with wallpaper without a pattern, or covered with decorative plaster, the corners can only be leveled flat.

Before work you need to choose a variety plaster mixture, calculate the approximate consumption and purchase it.

1. If you plan to decorate the walls outside the house or wet areas inside it, then work should be carried out using cement, lime, polymer plaster.
2. In dry rooms, in addition to the above types of solutions, gypsum-based analogues can also be used. The instructions do not recommend using them in damp rooms, since the material does not have sufficient moisture resistance.

Note! Buy plaster mixtures produced only well-known manufacturers. Even if their price is a little higher, you will be sure of the quality of the work. Before plastering, treat the corners with your own hands with deep penetration primer. It will significantly improve the adhesion of the finish and the base.

Plastering works

To finish the corners you will need the following:

• plastic container for solution;
• bubble level and plumb line;
• aluminum rule;
• large, medium and small spatulas;
• foam or wooden grater;
• electric drill with a nozzle for stirring the solution;
• sandpaper of various grain sizes.

Processing internal corners

1. Before plastering the corners, check their evenness using a plumb line or level. If they have very protruding tubercles, knock them off with a chisel and hammer. This will make your main work easier and save plaster mixture.
2. After the surface is prepared, it needs to be primed. This treatment will strengthen the corners and improve the adhesion of the plaster to the wall. The surface must be primed for the entire length of the rule used.

1. On the question of how to do straight corners when plastering. The control guides (beacons) will make your work much easier. They need to be done right in the corner.
2. When the primer is dry, you can begin installing the beacon. It should be a strip of gypsum mortar, having a width of 4/5 centimeters. The mixture must be mixed well before application so that there are no lumps left in it.
3. The finished solution is applied in the form of a strip to one of the adjacent sides of the corner from top to bottom. Next, it is aligned vertically using a rule and a level.
4. After grasping the first beacon, in the same way you need to install another control guide on the opposite wall.
5. Then you can begin to level the angle itself.. First you need to throw or spread the solution over this entire section of the wall.

1. Its excess is removed using the rule. Important nuance How to plaster internal corners correctly. To tighten the angle unnoticeably and smoothly, you need to choose a rule that is of sufficient length to support the beacons.
2. When tightening the mortar, one side of the tool should rest on the guide strip, the other, when moving vertically along the wall, should cut off excess plaster.

Note! This excess solution is not recommended to be reused, especially if it is a rapidly hardening gypsum plaster. Particles of the mixture that have begun to set will disrupt the homogeneity and plasticity of the material.

1. After spreading the main layer of the mixture, apply another thin layer of mortar (covering) to correct minor unevenness and grooves. Tighten it also with a rule.

1. Experts give one more valuable advice, how to remove a corner with plaster. Its final alignment is most conveniently carried out using a special one.

Plastering external corners

Now about how to properly plaster the corners of external walls.

1. First of all, they are checked for evenness. If necessary, use a chisel to knock off all the ridges and protrusions.
2. Then the wall surface is primed.
3. To properly plaster external corners, it is best to use metal profiles. They are corner strips with perforations.
4. These ready-made guide beacons are attached to the corners by pressing them into the gypsum mortar previously applied to the wall.
5. Excess mortar coming out of the holes must be removed with a spatula, and then check the vertical installation of the beacon.
6. Next, plaster beacons are placed on both sides of the corner.

1. After this, the surface of the adjacent walls between the metal guide and the plaster is plastered.

Conclusion

Now you know how to align corners with plaster in the optimal way. The main thing here is accuracy and carrying out the work strictly according to the level. If something remains unclear to you, watch the video in this article.

The most critical stage when performing plastering work is processing the corners. In order for them to turn out clear, even, without sags and depressions, desire alone is not enough, you must have experience, attentiveness and know professional secrets. We asked professionals about how to plaster corners.

Internal corners, which are formed between two adjacent walls or a ceiling and a wall, are called husks among professionals. The external corners resulting from the junction of the walls are called usable corners.

Corner finishing

Internal corners

During plastering work, you can use one of two options for finishing internal corners. The first of them involves joining the wall being treated with an already tiled one, the second method is simultaneous plastering of two walls.

Let's consider the first method. Spray and primer coat are thrown on in the classic way, are leveled by the rule, starting from the corner in the direction of the wall. Next, scratches are applied to the surface of the solution and an angle is formed.

To do this, the edge of the trowel/grater is placed against the set surface at an angle of 30-40 degrees, brought to the inner corner, placed on the surface and rubbed with alternating up/down movements. Place the tool flat on the newly processed side, and press the edge against the set side.

Using forward movements with strong pressure, clean it of adhering fresh solution. Once the primer layer has set, a coating is applied over it.

The second thin layer of covering is smoothed with a wooden or foam grater so that a smooth surface is obtained without cavities, holes or bumps.

When finishing the corner, the trowel is held so that its lower edge rests on the hardened side, and the corner just touches the fresh plaster. Move the tool up/down over the entire height of the corner. As a result, you will get a clear edge of the combined walls.

When processing two joining walls at the same time, the work follows the same pattern.

External corners

Metal corner profile (price - from 160 rub.)

Processing external corners during new construction or renovation of premises can also be done using two methods. The first of these involves using corner profile made of metal. This method makes it possible to plaster both combined walls at once and ultimately obtain a strong corner.

The second method has two stages, first one side of the corner is plastered, then the other.

The metal corner profile allows you to form an even and reliable outer edge of the walls without any problems. On both sides, the central part of the profile is adjacent to mesh shelves of various thicknesses (the latter is determined by the model of the slats). Before you apply a continuous layer of primer, the solution that secures the profile must be allowed to dry.

The corner lath can also be placed on a thin layer of plaster mixture, applied in a continuous strip from ceiling to floor; in this case, it is much easier to level the profile. All corner metal profiles can be shortened if necessary.

The side shelves are cut with metal scissors, and the central part with a saw. The fixed strip can also be used as a beacon when smoothing a layer of plaster primer.

As soon as the mixture has set, it must be trimmed with a steel trowel, thereby freeing up space for covering. It is applied in the classical way, the thickness is determined by the angular profile. To round the resulting plastered corner, use fine sandpaper.

Plastering the slopes

The narrow planes of door/window openings that are perpendicular to the walls are called slopes. it is necessary to pay attention to the fact that the depth and thickness of the created layer of solution must be the same.

Plastering a window slope

Thanks to such careful work, the width of the visible part of the window frame or door frame will be uniform throughout. A metal corner profile, equally distant from both the lower and upper surfaces of the window frame/frame, allows you to obtain an equal slope depth.

Instructions for finishing slopes with your own hands:

• Fix the corner profile. Place it on the floor or windowsill right triangle, made from slats (the length of its leg should be slightly greater than the width of the slope). Press the triangle with one of the legs to the horizontal beam of the box/frame, and the other to the front of the corner profile.
• Place the template on the triangle so that its edge, which faces the slope plane, coincides with the edge of the leg attached to the profile. Where the template meets the inner edge of the vertical frame timber, make a mark with a pencil. Drive a nail into this point so that it protrudes about 2.5 cm. If you use the template as a rule, the driven nail will act as a stop.
• When moving the template along the up/down axis, the distance between the wall and its edge does not change, this ensures an equal thickness of plaster along the entire perimeter of the slope.
• You can make a template stop in another way. At its end, from the side of the box/frame, cut out a rectangular ledge whose surfaces will rest against the edges vertical stand boxes/frames.
• The lower surfaces are plastered last. Start applying the primer coat, working towards the corner profile. Then, having leveled the soil with a template, spread the covering.

Common Mistakes

• Starting plastering without assessing the type and condition of the base material. This leads to the fact that in the future you have to make repairs to the cladding, dealing with problems in the form of cracks and complete peeling of the plaster.
• Applying a covering layer, bypassing the primer. There is a high probability that the angular contours of bricks/blocks will appear on the surface of the walls after it dries.
• Applying a gypsum-based coating directly to the base cellular concrete. These materials do not combine well with each other, so the plaster may crack in the future.

• Long breaks after partial walls or slopes. The solution should set evenly over the entire surface of one layer.
• By concrete base, whose humidity indicators are above 4%. The applied solution adheres very poorly to such a base.
• The most important recommendation on how to properly plaster corners on slopes. At the joints of plaster with door frames And window frames it is necessary to make expansion joints. Before work, expansion rails must be attached to them. Ignoring this rule may lead to the appearance of a crack.
• If external corner is located in a place of intense traffic, installation of steel or aluminum profile required. Otherwise, no one will give you a guarantee that the corner will not be damaged during operation.
• Cutting galvanized profiles with a grinder. This way you will destroy the zinc layer that protects the rail from corrosion. Subsequently, rust appears on the surface of the cladding in the form of red spots. To cut the profile, use only a hacksaw and scissors.

Cement and can be purchased at finished form or do it yourself.

Advice! To mix the mixture, it is better to use drinking water rather than industrial water. It contains much less impurities, so the likelihood of efflorescence is minimized.

Advice! The finer the sand included in the solution, the smoother the surface of the plaster lining will be.

Advice! If plastering work carried out at temperatures below +10 ° C, Portland cement is required to make the mixture.

Take note:

1. Plastering reinforced concrete and concrete surfaces it is necessary to start only after 28 days after pouring the solution.
2. It is recommended to prime the base before application. Before working with gypsum mixture, this is mandatory.
3. Between applying the spray and the primer, a break is required for the solution to set (at least 8 hours).
4. Do not forget that metal and wooden guides (beacons) are removed after leveling the plaster.
5. In those places where surfaces will be lined ceramic tiles, a primer layer is sufficient.
6. It is not recommended to leave empty space under metal profiles.
7. To smooth out the plaster in the inner corners, it is more convenient to use a special corner spatula.
8. You can paint walls or glue wallpaper 14 days after working with gypsum plaster and 28 days after applying cement, lime or cement-lime mortar.

Summing up

Now you know how to plaster corners. In order to more accurately understand the technological and practical issue, our website provides detailed photo and video instructions in which you will find necessary information on this issue.

Plastering corners, their diagnosis and leveling methods, preparation for work and processing technologies various types joining walls.

The content of the article:

Plastering the corners is a stage of preparing the walls to a smooth state for their further decoration. It is quite complex, because it involves working with surfaces located in different planes. However, this procedure is mandatory, since crooked corners can cause defects exterior finishing and cause complications when installing furniture or equipment. Having skills in construction, you can level the corners of walls with plaster yourself.

Measuring wall angles and how to align them

In order to measure angle deviations from the vertical and horizontal, you will need a square, plumb line or building level, flat piece aluminum profile at least 2 meters long and a ruler.

To determine the depressions and protrusions, you need to attach a piece of the profile to the corner. Then you need to install it in a vertical position, which is checked by the building level. After completing these steps, use a ruler to measure the maximum deviation of the angular line from the vertical established profile- this will be the desired distortion.

The horizontal deviation of the angle from 90 degrees can be measured with a large square. It should have long sides - almost from one wall to the other. You can make such a tool using the property of the Egyptian triangle and two long rules.

In the Egyptian triangle the presence right angle determined automatically by the aspect ratio - 3:4:5. Therefore, such a figure can be drawn on the floor, and then two rules can be aligned along its sides and fastened together in the form of a right angle. This tool may be useful for further work: beacons are installed under plaster on one wall the usual method, and to the adjacent plane - along the square.

The rectangular shape of the room can be checked in another way. To do this, measure the diagonals of the room. They should be the same.

If it turns out that after checking the walls have significant unevenness, forming angles that do not meet the norm, they can be leveled using plasterboard sheets, which are attached to a frame that can correct any curvature, even half a meter. However, such technology will take away a certain part of the living space, which owners usually treat very carefully.

In case of small defects in the walls, the corners are leveled with plaster, while effective area premises are preserved as much as possible. This method is more labor-intensive and involves a rather dirty process, but is highly reliable, creating a monolithic coating.

Preparing wall corners before plastering

To perform high-quality leveling plaster on corners, you should have necessary tools, prepare the surface of the walls and know certain working rules. Now let's talk about all this in order.

Ideal material To level corners and walls, use gypsum-based plaster. It allows you to increase the thickness of the coating gradually by applying thin layers of the mixture to the surface. Due to the rapid polymerization of the material, the plastering process does not take a long time.

To work with such a mixture, you need to select the appropriate tools:

• Rule. They use a rigid aluminum rail 10-12 cm wide and at least one and a half meters long. It allows you to accurately assess the condition of the plaster layer: its texture, bumps and depressions.
• Poluterok. This is a wooden, steel or polyurethane board 500-700 mm long with a handle attached perpendicularly to its non-working surface. The tool is used to apply and level the plaster mortar.
• Grater. This is also a blade equipped with a handle, its length is 20 cm. The tool is used for grinding and grouting the surface. On graters used for finishing, work surface the canvases are covered with felt, rubber or foam rubber.
• Corner. A device in the shape of a right triangle. It is used as measuring tool, a template when applying plaster and drawing mortar, performing the functions of a rule. To capture maximum area corner walls The size of the tool must be large enough.
• Trowel, spatula. These are a type of metal spatula equipped with a handle. A trowel is necessary for applying gypsum plaster to walls. This process involves the use of a spatula triangular shape as the most convenient. For a small amount of work, the trowel can be replaced with a spatula.

In addition to the above tools, to prepare the plaster mixture you will need a container and an electric drill with a mixer attachment for mixing the solution.

Before plastering an even corner of the wall, its surface should be cleaned of old peeling coating, paint, cladding, wallpaper and other finishing. In addition, you should pay attention to the presence of grease, bitumen or salt stains. If they are present, they must also be removed available means.

After this, it is necessary to measure the deviation of the angle in two planes in the manner described above and check the surface of its adjacent walls using a rule or a flat metal profile length of at least 2 m. The longer the length of the instrument, the more accurate the measurement result. Identified lumps should be knocked down with a chisel, and large depressions should be sealed with a solution and wait for it to dry completely. Then the surface of the walls adjacent to the corner must be treated with a primer to reduce its hygroscopicity and remove dust.

Basic rules for plastering wall corners

Before starting this work, you should familiarize yourself with some rules, knowledge of which will allow you to successfully complete it:

1. The plaster can be applied to concrete, cement-sand, brick and gypsum wall surfaces. Adhesion of the solution to wooden base it won’t work without using lathing made of slats or mounting mesh.
2. The thickness of the plaster layer on the walls is allowed to be no more than 50 mm, for individual recesses - 70 mm.
3. The mixture is prepared according to the manufacturer's instructions. It indicates the ratio of water and dry powder, which must be observed when mixing the solution. A small amount of added liquid will result in insufficient plasticity of the mixture, make it difficult to work with and can cause cracks on the surface of the plaster after it dries. Too much water in the solution will not allow it to gain the required strength and properly fill the recesses on the walls. Process water use is not recommended: it should not contain foreign impurities.
4. After mixing, the solution must be worked out within half an hour. Therefore, it must be prepared in small portions. You should not try to “revive” the drying mixture with water, other than deteriorating the quality of the plaster, this will lead to nothing.
5. The deviation of the angle line when plastering it should not be more than 1 mm, this will spoil appearance future finishing.
6. The angle between adjacent walls must be straight and strictly 90 degrees. Violation of this rule will entail problems in laying the rotating elements of pipes, joining skirting boards and installing furniture.

After preparing the walls, you can begin leveling plaster on their external and internal corners.

Plastering internal wall corners

In case of significant defects in the surfaces, the corners of the walls are plastered along the beacons, and minor unevenness at the joints is corrected using a special corner profile equipped with a reinforcing mesh - a counter-shoulder.

Plastering wall corners along beacons

This method of plastering corners is used when leveling walls around the entire perimeter of the room. To work, you will need a large square, the manufacture of which was mentioned above.

First of all, you need to select a supporting wall, mark the location of the beacons on it and fasten the screws according to it. By placing their caps at the same level, a base plane is formed. This procedure is performed using a plumb line.

The next step is to position the bottom and top screws away from the supporting wall. In fact, to obtain a right angle, it is enough to correctly install the nearest bottom screw. First, it should be screwed into the dowel as much as possible, taking into account the gap for the beacon of at least 6 mm.

After this, you need to attach the square to the pair of lower screws of the supporting wall and the far screw on the adjacent plane. It is necessary to determine what to do with the screw closest to the corner. If the rule of the square does not touch its head, the screw must be unscrewed until it touches. If the rule rests on the near screw, but does not touch the far beacon, you should unscrew the far screw. As a result, the heads of the four lower screws located on different walls, should create a right angle.

The upper screws are already leveled, focusing on the height of the lower screws being unscrewed from the wall. After installing the lower and upper screws on both walls, you need to check the thickness of the plaster layer under the beacons. After the beacons have hardened, their location can be checked again with a square. The step between beacons should not be less than the length of the rule.

The solution is applied first on one side of the corner. The cavity between the beacons is filled with the mixture and then distributed according to the rule. After one wall of the corner has dried, you can move on to the adjacent wall.

To smooth the joint of the walls, a special angled spatula is used, which greatly facilitates the work. Hand movements should be directed from the corner. During operation, the tool must be periodically moistened with water.

Plastering wall corners using a counter-shultz

This method is good if the walls are already leveled and you only need to finish the corners. To perform this work, you need to cut off a piece of corner with metal scissors reinforced mesh. Its length should be equal to the height of the corner. Aluminum countershaft is quite soft, for this reason you should not put much effort into it, so as not to disturb its shape.

Then apply a little gypsum mixture to the joint of the walls using a spatula and distribute it along the height of the corner. A piece of counter-shoulder must be applied to the corner and lightly pressed down using a long rule. The work should be done carefully, since the metal of the corner is quite thin and easily deformed.

Excess plaster mixture will be squeezed out through the profile perforations. This solution must be transferred with a spatula onto the counter-shultz mesh, smoothing it.

When the mixture has dried, the surface of the corner should be sanded with a fine-mesh abrasive mesh. If the surface is being prepared for painting, you need to apply a thin layer of fine-grained gypsum plaster to it, level it and rub it in after drying.

Plastering wall corners with reinforcing tape

With the help of plaster, an even angle of the walls can be obtained using a wide reinforcing serpyanka tape. This method is used only to form a joint between surfaces at an angle of 90 degrees and does not provide for their complete alignment.

For work you will need gypsum plaster, wooden block strictly rectangular section and 40-60 cm long, as well as reinforcing tape.

A small amount of plaster should be applied to the joint line of the walls, covering 10 cm from each adjacent surface. Then the edge of the serpyanka needs to be applied to the top of the corner and, holding it at this point, unwind the roll to the bottom, as far as the width of the arms allows. When performing this procedure, it is important that the serpyanka does not deviate from the given direction and evenly covers the joint.

After gluing the tape with plaster, you should take a block, and then, using pressing movements along the joint line and its planes, give the corner a straight shape. The crumpled tape on the walls can be leveled with a spatula, and the excess mortar can be transferred to the rest of the area, distributing it from the corner line. You need to work with a spatula carefully so as not to disturb the position of the tape at the joint. After the mixture has dried, the reinforced coating of the corner should be sanded with an abrasive mesh or sandpaper.

Plastering external corners of walls

Beautiful, ideally shaped external corners can be achieved with or without a perforated metal profile. In the first case, the strength of the corner will be higher.

Plastering the external corner of the wall without reinforcement

Before starting to work with this method, all protrusions on the wall surfaces adjacent to the corner should be knocked off with a chisel and large cracks should be sealed with mortar. The process begins with installing a flat board or wide strip on the side of the corner, which will serve as a kind of formwork. Fastening is done to the floor and ceiling, but if you choose the optimal length of the board, it can be installed by surprise.

The board should be wrapped with tape and protrude from the outside around the corner to a distance equal to the thickness of the plaster layer. The adhesive tape is designed to prevent the solution from sticking to the surface of the “formwork”.

Then plaster is applied to the surface adjacent to the corner and distributed over the entire height of the joint using a rule. Movements are made towards the corner with a slight downward inclination.

After no less than two days, you need to carefully dismantle the board and attach it in the same way to the already plastered side of the corner. Then you should repeat the above procedure with the other wall.

The finished corner is sanded with sandpaper or a grater equipped with an abrasive fine mesh.

Plastering the external corner of the wall with a profile

The metal profile forms a straight line of the corner and protects it from accidental mechanical damage. Calculating the number of aluminum corners is not difficult: you need to measure and sum up the lengths of all external wall joints and add 10% to the resulting figure, taking into account material waste during installation. Standard length the corner is 3 m, and the height of the premises is from 2.5 to 2.8 m. Thus, 20–50 cm of the profile in the form of trimmings for each corner will be wasted. They can be useful for forming short corners on wall or ceiling projections.

To form a right angle when plastering walls on its adjacent surfaces, you first need to apply the prepared gypsum mixture.

Corner required length It is attached using pressing movements to the area treated along the entire height of the joint. It is advisable to carry out this work using a rule that will prevent deformation of the corner from careless hand pressing.

Excess mixture squeezed out through the perforation of the profile is transferred with a spatula from its metal part to the mesh. Immediately after installing the corner, its position on the wall should be checked with a building level. While the mixture has not hardened, any adjustment is possible.

After the plaster has dried, the corner of the wall should be sanded with an abrasive material. Finishing corner is carried out in conjunction with the walls.

Plastering rounded corners of walls

It is not difficult to plaster rounded corners of walls. First, the adjacent joint surfaces of the enclosing structures should be leveled with a gypsum mixture along standard technology. When creating curves, the planes of adjacent walls act as beacons, and the rules are a special template.

It can be made like this: a strong plastic wire needs to be pressed into a rounded corner, the shape it acquires will give the outline of the future template. Then the sample must be attached to thick plywood and outlined with a pencil. Along the resulting line, you need to trim off the excess material. The template is ready.

Then you should throw a plaster solution over the corner along its entire height and remove its excess with a template. Ellipses small sizes do not require reinforcement. But when making curves with a diameter of more than 100 mm, they need to be strengthened with wire or reinforcing mesh. You can get by using screws. They are screwed into the curve with a pitch of at least 200 mm.

After the corner plaster has dried, you need to apply the final finishing layer adding to the solution fine sand. This coating is rubbed with felt to create the maximum smooth surface rounded corner. Grouting should be done only with horizontal movements.

How to plaster the corner of a wall - watch the video:

Plastering and leveling corners is considered the most difficult task, especially for beginners. It requires quite a high level of professionalism. However, with a conscientious and leisurely approach to this matter, you can create even corners in the room quite independently. The difference when the work is performed by professionals lies in this case only in the time that will be spent on it.

Many people know how to properly plaster walls, the process is simple and after several trainings, the coating turns out perfect, but the corners are a task on a completely different level. Unfortunately, when I often start work, home craftsmen ignore this moment, leaving it for last, and in vain, since it is the angle of the wall that sets the direction for the entire coating.

And subsequent finishing, be it wallpaper or painting, will reveal all the errors and spoil the entire impression of the new renovation.

That is why I decided to consider in detail the question of how to plaster the corners.

Interior

This is considered to be the most difficult stage in plastering, and so I decided to start with it. First, you need to prepare all the necessary tools, some of which may be unfamiliar home handyman without experience:

• A long rule will be needed for alignment large area between the lighthouses.
• Average length rule, necessary for comparison small plots and removing excess plaster mixture.
• Angle spatula. This tool is designed in the form of a right angle of 90 degrees and is capable of leveling the surface in hard to reach places, where no other tool will fall short.
• Construction level 1.5-2 meters long. It is necessary to align the beacons along the entire length. You can get by with a short level, but this will significantly slow down the process and create certain difficulties.
• 90 degree square. To determine the perpendicularity of beacons.

Advice! Before starting work, the construction level must be checked for errors. This is quite simple to do, just place the tool against the wall, achieve an even line, and draw a line. After this, the level is turned over and applied to the drawn line on the other side. If the readings remain the same, the level is operational and ready for use, but if the readings on the same line on the right and left are different, then the tool is lying and needs to be adjusted or replaced.

Plastering the inner corner

First of all, it is necessary to fix the beacons. They are attached to the wall using plaster mortar, which makes it easier to adjust their level. The step between the fastenings should be about 20 cm; this will not allow the lighthouse to “walk” and sag under the pressure of the rule.

The outermost beacon is placed approximately 5 centimeters from the corner so that it is exactly perpendicular to the wall from which the corner is created.

After the beacons are fixed, they need to be allowed to dry and firmly adhere to the wall surface, after which you can proceed to “throwing on” the first layer of plaster. Excess mixture is removed as a rule in such a way as not to damage the other wall, so there will be unevenness in the corner itself; they are smoothed out with a corner spatula, while you need to apply slight pressure on the tool so that the corner is slightly lower than the walls themselves. This is necessary for applying the finishing layer and final leveling.

After removing all the unevenness of the first layer, you can begin applying the second. The process is completely no different from that described above, with the only difference being that now there is no need to press the corner spatula.

Now all that remains is to sand the walls and corner with fine sandpaper and you're done.

External

This process is considered less labor-intensive, since the corners are aligned with plaster using special corners that act as a beacon, and can also be with a reinforced mesh glued.

“Old school” specialists often consider such innovations overkill and carry out repairs without them. But don't deny all the benefits. modern materials, since corners significantly improve the quality of the plaster and strengthen the corner.

Here are just a few arguments in favor of plastering corners:

1. The steel beacon strengthens the coating and allows the plaster to crumble.
2. An additional reinforcing mesh reliably connects the two walls, making the coating monolithic.
3. There is no need to carefully smooth out the corners, since the beacon is already level and is the zero mark in the plaster of the entire wall.
4. Plastering corners is much faster, and the process does not take much effort.

First of all, it is necessary to determine the most convex place on the wall that cannot be eliminated or leveled. This is the starting point in installing beacons. In order for the wall to be smooth and without drops, all beacons, including the corner one, must be located on the same level.

This can be determined using a long rule that applies to the outer beacons, and everything that is between them must fit tightly to the instrument.

When the beacons are fixed, you can proceed directly to plastering, and the corner itself will simply need to be sanded.

Advice! corners can be of different configurations: with an acute angle or with a rounded one. They should be selected based on the subsequent finishing. Best used for wallpaper sharp corner, and for decorative plaster or painting, a rounded one will do.

As you can see, there is nothing complicated in finishing the corners; the main thing is to just know the technology and pay special attention to setting the beacons according to the level.

• The base under the plaster should always be thoroughly cleaned and primed.
• Cellular concrete does not come into contact well with gypsum plaster.
• There should not be long breaks between applying layers of plaster; the finishing layer is applied as soon as the first one begins to dry.
• Before plastering the corners, you need to cut the beacons to size, it is advisable to do this with scissors or a jigsaw, since the grinder burns the galvanized layer and the beacon will quickly begin to rot at the cut site.
• You can start finishing the walls no earlier than two weeks after plastering.
• Before plastering the corners of the walls, they need to be carefully primed, and it is best to use a brush here, since the roller will not be enough, and subsequently in this place the layer will begin to fall off.

Using these tips and using quality materials, finishing the corners will no longer seem like a difficult task. As they say, nothing is impossible, but before starting work you should still practice.