Plastering wall corners: advice from a builder. How to plaster corners so that they become smooth How to make an internal corner with plaster

Collateral quality repairs is the correct alignment of the corners of the walls using plaster. As a rule, curved walls are present in any room. they know everything and this does not require special knowledge and skills. You just need to practice a few times and everything will work out. But plastering corners requires certain knowledge and skills.

As with any finishing works, the wall covering must be carefully prepared. The result of high-quality work should be a perfectly even joint of corners.

It is important to take it seriously. It is best to opt for mixtures famous manufacturers. Of course, their price will be a little higher, but the quality of work will increase significantly.

For plastering outside or in rooms with high humidity you need to purchase cement, polymer or lime mixture. And for dry rooms, mixtures that have a gypsum base are suitable.

Preparatory work

Before any kind repair work the first thing you need to do is prepare everything the right tool. It is important that all tools are at hand.

To plaster wall corners you will need the following tools:

long building level, rule;
two spatulas - straight and angled;
grater;
plaster mixture;
perforated corner profile.

Before plastering the corners of the walls, you first need to prepare the walls:

First, clean the walls of the old coating. A rule is applied directly to the joint of the walls in order to achieve more accurate alignment. It is best that it is about 2 meters, then the result will be more accurate. To eliminate irregularities, as well as lumpiness, a chisel is suitable, which must be carefully removed.
For small recesses, the same gypsum mixture is suitable, which is intended for leveling the wall panel. It must be applied to the recess and left until it dries completely. This takes approximately 48 hours. After the mixture in the recesses has dried, it is necessary to move on to the main part of the work - plastering the entire surface of the wall.

Corners can be both internal and external, so the plastering process for each type differs in its technology.

Three plastering methods are used for plastering internal corners:

using perforated profiles with a reinforcing mesh (counter-schultz);
by lighthouses;
using serpyanka.

For plaster external corners apply:

profiles with reinforcing mesh (contra-schultz);
straight slats.

Aligning interior corners

Not everyone knows how to plaster internal corners. But following the instructions, even a beginner can do this. The main thing is to do everything accurately, and most importantly carefully. Plastering corners with your own hands can be done in three ways.

Using beacons

This method is applicable if all walls are completely leveled along with the joints. It is necessary to mount it to the wall surface. Installed profiles, should be located at a distance equal to the size of the rule. The distance from the lighthouse to the wall is approximately ten centimeters. These actions are performed on both walls that form the corner.

The plaster mixture is first applied to one wall, then to the other. another. It is necessary to fill the entire area between the beacons and level everything using the rule; excess mortar in the corners is carefully “trimmed” with a wide spatula. Then you need to wait for the layer to dry completely and then move on to the next section of the wall.

To shape the joint of the walls, use an angled spatula. When working with it, you need to moisten it with water from time to time. If a straight spatula is used, then the trajectory of movements should be jerky and directed from the corner.

When the coating has dried, you need to dismantle the beacons and fill the recesses from them with the same mixture.

Using perforated profiles

This method is suitable when the wall surface is pre-plastered. The profile must be cut, taking into account the length of the joint, using metal scissors. The mixture should be applied to the joint, but not too much. After which you need to install the perforated corner on the plaster corners, pressing down a little using the rule. The counters are easily deformed, so you need to apply pressure carefully. The solution that has leaked through its mesh is removed with a spatula. Movements should be from the corner.

After everything is dry, you need to sand the corners and, if necessary, cover with a final thin layer.

With the help of serpyanka

This method can be rationally used if it is necessary to strengthen the joint of walls, for example, when working with drywall. The tools you need to have are reinforcing tape and a rectangular block of wood about 60 centimeters in length and a prepared solution. The gypsum mixture must be applied in small quantities to the joint, while covering 10 centimeters of the wall.

Next, the serpyanka is applied to the highest point of the corner, after which the roll is untwisted to the distance of an outstretched arm. It is important that the bottom of the tape lies correctly, and most importantly, does not move to the side. A block is applied to the tape, pressing slightly, thus forming an angle. Using a spatula, remove the released mixture and level the tape.

Movements must be careful so that the tape does not deform or move to the sides.

Aligning outside corners

For plastering external corners, two leveling methods are suitable, using: a perforated aluminum profile or without it.

Without using a counter-switch

Initially, it is necessary to completely remove the existing protrusions and recesses. A board with a flat surface must be attached to the adjacent side of the corner, and it must be prepared in advance, namely, wrapped with tape. The ends of the boards are attached to the base of the ceiling and floor, and the distance from the wall must be made such that it is equal to the planned thickness of the plaster coating.

The gypsum mixture must be applied evenly; it can be leveled using a rule. The trajectory of movements should be directed towards the corner.

After 48 hours, you can dismantle the board wrapped with tape. After this, carry out the same actions on the other side of the corner. Finally, the plastered surface is sanded sandpaper.

With perforated aluminum profile

To accurately calculate how much material will be required, it is necessary to measure the lengths of all joints, add up all the data and add approximately 20% for unforeseen consumption. The ready-made gypsum mixture is applied on both sides, and the corners for plaster are attached using pressing movements. The solution that has leaked through the holes is removed using a spatula. It is important to check whether the profile is positioned correctly and, if necessary, make adjustments to the level. When the plaster dries, you need to remove the unevenness using the power of sandpaper.

Plastering corners is one of the most difficult stages of wall leveling, especially for novice craftsmen. However, after mastering the technique, usually no questions arise, and having completed the task once, in the future we will be able to level corner connections"automatically".

Below we describe the optimal sequence of actions. Using these tips, you can quickly master leveling technology.

Tools and materials

To successfully implement the task facing us, we need to acquire a set of tools.

We will need:

Trowel for throwing mortar.
Graters of different sizes.
Rake-rule.
Spatulas (smooth and with beveled edges).
to decorate the corner.

Note! The blade configuration for outside and inside corners will be different, so choose carefully!

Containers for plaster.
Square for checking the perpendicularity of planes.
Level and plumb.

We should also buy Consumables. First of all, this is, of course, a leveling mixture. Plastering the corners is done using the same material as the treatment of the wall itself.

We also need to purchase special corners that will make processing much easier for us.

They come in several types:

Most often, leveling corners with plaster is carried out using a steel or aluminum perforated overlay. It has a good margin of safety and reliably protects the walls from chips.
Instead of a metal corner, you can use a plastic cover. Plastic products less susceptible to corrosion, in addition, some models can be bent to form curved surfaces. Price similar products almost the same as steel angles.

To apply a thick layer of leveling material, you can buy a combined model, which has strips of metal or fiberglass mesh installed on the sides.

Note! Fiberglass is an alkali-resistant material, so it can be used when leveling walls with cement mortar.

Having purchased required amount overlays, you can start working on site.

Preliminary work

Preparing surfaces for finishing

First, we need to prepare the plane joints themselves:

At the first stage we perform machining: we knock down large protrusions with a chisel or a hammer drill, dismantle weak areas.
Then we clean the surface from dust and construction waste. Special attention We pay attention to oil stains and painted areas, since these are the areas that are problematic for plastering. We remove the oil with a solvent and clean the paint.
At the last stage, we prime all the walls, including the corners.

Installing guides

For this:

We fix beacon profiles on the planes, which we set according to the level.
Apply a thick coating to the edge of the wall plaster mortar. The thickness of the layer must be sufficient to secure the protective part at the required distance.
We cut the overlay to the height of the wall and glue it to the load-bearing surface.
Using a level, we adjust the position of the corner, moving it until it is in the desired position.

Internal. Special devices for this purpose they are rarely used, since at this point the junction of the planes does not experience any loads.

If it is necessary to apply a thin layer of plaster, the corner can be attached using self-tapping screws. In this case, it is necessary to use exclusively stainless steel fasteners, otherwise stains of oxidized metal will appear through the finish.

Joint alignment

External corner processing

After the solution with which we attached the overlays and the mesh has dried, you can begin to process the corners. Internal and external connections are formed differently, so below we will pay attention to the key features of the workflow for each situation.

Let's start with how external corners are plastered:

Apply the solution onto the plane using a trowel. We lay a slightly larger amount of material along the corner.
Using the rule, we remove excess plaster first from one wall and then from the other. The rule should be based on the beacons and the corner.
Using spatulas and graters, we correct processing defects using the rule. If necessary, add small amounts of mortar to the recesses and smooth them.
We finally level the planes with longitudinal movements of the spatula. At the same time, make sure that the blade does not touch metal or plastic.

Advice! If the corner is located on the passage, then it makes sense to remove a small chamfer. Forming a rounding will save us from chips that are inevitable for a sharp joint.

Forming an internal corner

Plastering internal corners is carried out according to a different scheme:

To begin with, we install the beacons in such a way that the planes of the walls are connected at 90 0. If there are several corners in a short section, then you can step back a little from the perpendicular - it still won’t be noticeable.
Then we very carefully align one wall with the beacons. We do this using the rule, adjusting the plaster with a trowel and a spatula.
After setting one wall, we begin processing the plane adjacent to it. In this case, the instructions recommend using a spatula with a beveled blade so as not to touch the already drawn surface during work.

Note! You can plaster both walls at once, but then the rule is not to bring it to the joint by 5-10 cm on each side. These stripes will have to be aligned manually.

To form the angle itself it is convenient to use special tool. By running the curved blade from top to bottom, we remove excess material and create a clear outline of the joint.
We trim off the remaining mortar using a spatula. This is convenient to do when the composition begins to set.

Ways to align internal and external corners. Application of material and tools. Calculation of an even angle, methods for determining a 90 degree angle.

How to level a wall corner

A smooth surface is a sign of high-quality work by plasterers and putters.

You can glue it on it various wallpapers, coat with paint, veneer with panels or ceramics. If there are no workers, how to level the corner of the wall, make the surface even and smooth?

To make angles at 90 degrees, materials, tools and certain skills are required.

Why is it necessary to level the corner of the wall?

Smooth wall joints in the room – a neat appearance. If crooked walls can be hidden behind wallpaper and paintings, then the corners will make the room untidy.

Experts consider another disadvantage of curvature to be the difficulty of installing tiles, gluing wallpaper, and other finishing coatings. To align the joints of the walls you need to work hard, however, in the future this will affect appearance and neatness.

How to align the internal corners of the walls in a room with your own hands

For alignment internal joints preparatory work needs to be done.

The cleaned surface of tiles or wallpaper is checked for the presence of voids under the plaster. It is necessary to tap the adjacent walls from the ceiling to the bottom. If the sound changes (empty), it is better to roll off the plaster. Otherwise, it may fall off on its own along with the topcoat. Another sign of emptiness is small cracks running horizontally on the floor.
After the coating has been collapsed, all debris is removed. This is dusty work, but it will not interfere with subsequent work.
Clean everything from dust and small pebbles with a dry brush. To reduce dust, you can spray the area with water from a sprayer.
Next, the surface is coated with a primer, preferably 2 times.
A plumb line is lowered from the ceiling to the floor to determine the curvature. If large deviations are detected the best option is drywall. Otherwise plaster layer will have to be applied several times, each dried layer being primed.

The internal corner can be aligned using several methods. In addition to drywall, ordinary gypsum or cement plaster, beacons, corner spatulas.

How to level previously plastered walls in an apartment

If the wall is crooked, then leveling the joint will be a waste of work. Curved plastered walls must be identified by the percentage of curvature. This can be done by a level, a plumb line, a rule. The walls are aligned in a circle.

Materials used for leveling walls:

Drywall. For large differences, a frame frame is used metal base. If the walls have a slight curvature, then gypsum boards are glued to the surface.
Chipboard. Plates are suitable for leveling not very curved surfaces.
Panels. When leveling walls, use frame base.

Depending on the room, humidity and temperature changes, the desired material is selected.

How to display a 90 degree angle on walls

When plastering walls yourself and leveling joints, use a plaster corner profile. It can be metal or plastic. On the sides of the corner there is a reinforced mesh. The profile is applied to the wet plaster and leveled using a level. Reinforced mesh covered with plaster mixture.

The joining surface can also be made smooth using an angle spatula. It has a perfectly even shape. Without any effort, it can be used to create a 90-degree joint between walls.

It’s difficult to get 90 degrees on your own. This is only possible with small differences, where putty is applicable.

What materials are used to level wood?

The wooden surface also needs pre-treatment followed by leveling. Align wooden surface possible using materials:

Drywall. For installation, you must first measure the degree of curvature, then take measurements and calculate the materials. The frame base is made from wooden slats or metal profiles. For a strong frame, transverse stiffeners are made. Fixing gypsum boards in the corners is done using several technologies. The joints of the walls are smooth at 90 degrees.
Chipboard. They are also mounted on a frame base made of wood. All elements are treated with drying oil or antiseptic agents.
Plywood 6-9 mm. It needs to be processed. The material is mainly used for leveling surfaces in the garage, pantry, country house. A wooden frame is also created for fastening.

Afterwards, the created surface with even corners is puttied, primed and covered finishing material– wallpaper, paint, tiles.

As well as walls and their joints wooden house leveled with materials:

putty – layer of applied mixture 2 mm. Before applying putty, you need to treat the walls;
cement mortars - applied to a rough surface or pre-filled with shingles or large mesh;
use of corners. If the walls are smooth or have slight differences, metal or plastic corners. In this case, after a second layer of putty, the angle is 90 degrees.

Cement mortar shrinks. When applying a thick layer, care should be taken to ensure that the created plane does not flow down.

How to make the outer corners of walls smooth

Crooked external corners are the result of hasty work by builders. To align them, you must first determine the degree of curvature. Another reason for leveling is frequent impacts from sharp and heavy objects.

Materials and tools will be used for leveling. A level is also required.

What you need

To work, you will need a perforated corner, a putty or plaster mixture based on gypsum, a primer, regular and corner spatulas.

The work is not difficult to carry out if you have everything you need “at hand”. Even the most curved joining surface can be created at 90 degrees without much effort or time.

How to align wall corners at 90 degrees using a corner

An outer corner is easier to align than an inner one. For this, a perforated metal corner is used.

First, the surface is cleaned and coated with a primer.
Afterwards the degree of curvature is determined.
Plaster or putty gypsum mortar is applied to the corner on both sides.
The corner is pressed into it and leveled using a level.
Allow time for the solution to harden. All excess mass is removed. Level the sides with a spatula.
After drying, remove the excess with sandpaper and apply the solution again in a thin layer. At the same time, the work is done carefully so that there are no tubercles.

The final step is sanding and applying primer for a finishing touch.

A perforated corner will not only level the angle at 90 degrees, but also protect the surface from impacts.

How to set a 90 degree angle when plastering walls

If the angle has a large percentage of curvature, then a different method is used. On the wall from the joint in opposite side they put up a lighthouse. Alignment goes away from him. Thus, the adjacent wall is leveled. Smooth walls form an angle of 90 degrees. The final leveling is done with an angled spatula.

Ways to check the 90 degree angle between the walls inside and outside

There are several ways to check how straight the angle is. So:

A square is the easiest way.
The second method is to create a corner from a profile. Measure 30,60,90 cm from the corner along one wall. The length of one side of the profile will be equal to 90. To the other side on the adjacent wall, set aside 30,60,90,120 cm. The length of the second side of the profile corner will be equal to 120 cm. From one point where set aside 90 to another point 120 there should be a distance of 150 cm. The sides of the profile are connected with screws at 90 degrees. The edges are connected with another piece of profile equal to 150 cm. With this corner, the internal corner in the room is measured in several places.
The outer corner is measured according to the same scheme, only all marks are marked on the floor. That is. From the outer corner on the floor you need to set aside a length that is a multiple of 4. Let’s say 1.6 meters. It is laid along one wall. Next, along the other wall you need to set aside 1.2 meters. There should be a distance of 2 meters between the end points. If so, then the angle is 90 degrees. If not, then alignment should be applied.

Before you start aligning the joints of the walls, you need to find out how much deviation or curvature they have. For leveling, both drywall, plywood, and regular putty, and perforated corners. To derive an exact beautiful angle, you need to stock up on materials, tools and a little mathematical knowledge - the Pythagorean theorem.

Useful video

What you need to know about the corner alignment process: what tools to use and tips to keep in mind. Is it possible to do this work yourself if you are an inexperienced craftsman? What techniques should I use to ensure everything goes smoothly and reliably? The article will be useful for both amateur repairmen and professional craftsmen. The former can learn, the latter can learn something important for themselves.

Plastering wall corners: how to do the work

Apartment renovation is an event for all family members. It is worth taking seriously, because this is not done for one year. If you are confident in own strength, you can start repairs yourself.

If you don’t know where to start and how to finish, it’s better to contact experienced specialists who will help you solve the problem.

Processing corners is considered a difficult and important stage of work.

So that the corners are straight, without depressions or sagging. Therefore, it is worth learning some professional construction secrets.

How to plaster the corners of walls so that they are straight: existing techniques

Corners are obtained by combining two walls or a wall and a ceiling. The internal ones are professionally called husks, and the external ones are called usenki. There are some peculiarities in the plastering technique that require preparation of adjacent walls before starting work.

Today, professionals use the following basic techniques for husk and stucco plastering:

Do-it-yourself plastering of wall corners: stages of work

Leveling corners with your own hands using plaster is a very labor-intensive, but completely doable process. The problem is that you need to achieve a clear right angle exactly 90°. When wallpapering walls, 1-2 degrees of deviation is permissible. But when decorative putty or painting it will be noticeable. For example, in the minimalist style that is so popular today, there are clear lines and deviation of even half a degree is unacceptable.

What you need

Before starting work, it is worth preparing tools and materials.

If you don’t know what consistency the plastering mixture should be, give preference ready-made materials. It is better to leave dry mixtures for professional builders. A good option is a gypsum-based mixture, which is also called starting putty.

Required tools:

a bucket or bag with the selected material.
drill or hammer drill;
spatulas of different sizes;
rule;
grout;
level;
square;
templates

To treat husks and grit, there is a special primer that helps adhesion between the plaster and the wall.

How to carry out work

Preparation should begin by knocking down the protrusions in the corners of the room. This will help save materials for plastering. After this, the walls are primed with a special deep penetration mixture.

You need to prime an area slightly larger than the width of the rule.

Starting plastering the husk, we install control beacons. They are made in the form of a small strip gypsum plaster. Then the mixture is applied to the corner sections of the walls and leveled using the rule. To make the tightening job easier, use a long tool. Then they prepare another lighthouse, located on the adjacent wall. In the same way, the adjacent plane is tightened.

How to plaster external corners of walls

The easiest way to plaster the stud is with the help of a counter-shoulder. This is an angular profile that helps to make the fitting even and protect it from damage and chips.

You need to apply a small amount of the mixture to the fitting and place the corner profile on top with a light pressing motion. Excess plaster that comes through the holes must be removed with a spatula.

After drying, you need to “walk” the corners with fine-grained sandpaper. Finishing layer applied together with plaster of the ceiling or walls.

It is worth considering some recommendations from professionals to get good repair as a result.

If you are only an amateur in the field of repair, it is better to use auxiliary materials and tools.
Use a primer to ensure good adhesion of the applied mixture to the surface.
Wait for the previous layers to dry, otherwise everything will crack or fall off.
Use branded ready-made mixtures.

Plastering corners is quite a painstaking job. If you don't know some secrets, you can ruin the final appearance of the room. To do such work, you should carefully prepare and have the necessary tools.

In order for everything to hold up and be done conscientiously, you need to use Additional materials. To create a strong bond between dissimilar layers, adhesive additives are used. As a result, if you have the desire and even a little skill, even novice builders can make even husks or stubs.

Useful video

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

How to plaster corners in different options, we’ll look at it today. Also in the video in this article you can clearly see all the work and then perform 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, it is necessary to apply a layer of primer. It is better to use deep penetration.

Making interior corners

Plastering surfaces with corners involves finishing internal corners of two types: finishing the internal corner adjacent to the facing surface, and finishing 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 mortar is applied 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 grater must be pressed against the facing surface, and working part 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.