How to plaster the corners of the walls

The technique of plastering the outer and inner corners of rooms has its own characteristics and requires careful preparation of the wall surfaces adjacent to them. The main attention is paid to the quality of the execution of the corner joint with the observance of all indicators stipulated by the standards.

Nowadays, there are two ways to level the corners in the joints of the walls, the order of use of which is determined by the type of subsequent decoration of the walls of the room. In the case when the walls in the room are supposed to be covered with wallpaper with the selection of the picture - you can level the corners by level. When they are planned to finish with decorative plaster, they usually resort to leveling the plane.

Preparation of materials and tools

Before plastering the corners of the walls you will need to prepare the appropriate materials, by means of which you will be able to level the corner zones by applying several layers of coatings (without the so-called “subsidence”).

We recommend that you purchase only high-quality ready-mix, produced by reliable and proven manufacturers. In this case, the best option is considered to be plaster, prepared on the basis of gypsum (it is also called starting putty).

Corners can be treated with a special primer of deep penetration, which significantly improves adhesion to plaster.

To organize plastering work, you will need to prepare the following accessories and tools:

• plastic bucket;
• electric drill with a whisk;
• rule and set of spatulas;
• special "grout";
• set of sandpaper of various grit.

Plastering interior corners

To align the angles of this type, control beacons are installed directly in the corner. For a smooth and inconspicuous "tightening" of the corner to be drawn up, you should use the rule of the largest possible size (length).

Preliminary preparation of the surface of the corners is reduced to removing (knocking) from it noticeably prominent hillocks and protrusions, which will allow you to save on the amount of putty applied. After leveling, the surface is primed with a deep penetration compound, which further strengthens the treated area and increases adhesion with the layer of putty. Priming is carried out over the entire width of the rule used in preparing the corner, or even slightly more.

After drying the applied soil, you can proceed to the preparation of the corner beacon, which is performed in the form of a five-centimeter strip of gypsum plaster. For its preparation, a plaster mix is ​​used, which, first of all, is thoroughly mixed to avoid the formation of lumps.

After that, the mixture is applied to the corner sections, and then leveled in a vertical plane using the rule. Upon completion of leveling the mixture and its complete drying, it will be necessary to prepare another beacon, which should be placed on an adjacent wall.

After the lighthouses are prepared, you can proceed to the "tightening" of the walls in the area of ​​the corner joint, produced by the same rule. When applying plaster to the wall for the entire length of the rule, one of its ends must rest on the beacon installed earlier, while the other one is conducted along the wall with simultaneous cutting of excess material. A layer of putty removed with the help of the rule cannot be reused because dried fragments of the solution will break the plasticity and homogeneity of the finished mass. To eliminate (“clogging”) visually discernible grooves or scratches, it will be possible to apply another layer of the mortar and “pull” the corner surfaces using the same rule.

Plastering exterior corners

Before plastering the corners of the walls from the outside, you should knock down all the build-ups and protrusions on it. Only after that you can proceed to the priming of the surface prepared for plastering. For high-quality plastering of external corners, it is recommended to use special profiles, which are perforated metal strips of a certain length, made in the form of angles.

Being essentially ready-made beacons, such profiles are fixed at the corners by pressing them into the solution already applied to the surface of the walls. After that, you can remove excess plaster mix and check the vertical structure in both planes.

The final grouting of the outer corner, made with the help of “classic” abrasive tools (construction mesh or the so-called “pelt”) should be done after a certain time, when the layer of applied plaster dries completely.

We advise you to read:

• how to properly glue vinyl wallpaper;
• how to glue the ceiling plinth.

Video

We offer to watch the following video about the plaster of the inner corners: