Technology of plastering walls with mesh. Review and tips for choosing reinforcing mesh for plastering walls. Is it possible to use masonry mesh for plaster?

The method of installing a polymer mesh involves a number of stages.

1. At the first stage, the base is prepared. Preparatory work include cleaning and priming the surface.
2. The next step is to measure the wall surfaces and cut the canvas in accordance with the measurements taken and add a margin of approximately 10 cm (for overlapping panels).
3. After this, the glue-based composition is prepared.
4. The main stage is applying the initial plaster layer with a density of 3-5 mm with pressing the painting mesh into the solution.
5. After original layer When it dries, the surface is covered with a primer and the final layer of plaster is applied, leveling is carried out according to the rule.
6. At the last stage, the dried wall surfaces are sanded.

A few useful quick tips will allow you to complete the job of plastering walls with the highest quality possible.

1. The denser plaster layer, applied to a base made of brick or concrete, the stronger the mounted steel mesh should be.
2. Simple steel mesh in rooms with high level humidity, for example, in baths and bathrooms, as well as for external cladding, it is undesirable to use. The whole point is that steel types materials are prone to rust. It is preferable to install a mesh made of fiberglass or welded with a galvanized coating.
3. Before installing a metal reinforcing product, it must be degreased.
4. It is unacceptable to use a reinforcing mesh made of plastic for plaster mortar prepared on the basis of cement, because over time cement mixture will corrode the product.
5. Many people, when performing work on plastering walls, first lay the mesh to the wall surface and only then plaster - professionals do not advise doing this: as a result, cavities may form in the cells and the degree of adhesion will decrease.
6. When calculating the required number of dowels, keep in mind that per 1 sq. m. approximately 16-20 pcs are required.
7. When installing reinforcing material, do not allow it to sag or peel off from the surface by more than 10 mm.
8. For internal cladding, as well as for external cladding, the best option will use a reinforcing mesh with cells with a diameter of 5x5 mm and 10x10 mm.
9. The fiberglass mesh must be impregnated with a polyacrylic compound. If the mesh is not impregnated, it cannot be used with plaster mortar, otherwise it will gradually collapse under the influence of alkalis.
10. If shingles were used to decorate the wooden surfaces of the walls, it is preferable to choose a chain-link mesh.
11. With a layer density of about 50 mm, due to strong surface differences, it is undesirable to plaster the walls. Preferably used for decoration Wall panels- this finishing material will help hide existing defects.
12. In the case of plastering small areas, a plaster mixture can be used as fasteners. It is applied pointwise, after which it is evenly distributed over the entire area.

Application of reinforcing plaster mesh during execution interior work for plastering wall surfaces allows you to do it efficiently. The presence of a mesh extends the service life of the finishing material; the main thing is to choose the right type of reinforcing mesh, based on the conditions of its use.

Video

Watch the features of plastering walls with mesh in the video:

Mesh for plaster interior walls allows for higher quality finishing of premises. This technology prevents the solution from peeling off the surface, makes the coating harder and doubles its service life.

Mesh plaster – what is it and why is it needed?

Grid plaster is one of the ways to decorate walls. This method is needed to strengthen the facing layer on uneven surfaces. It is mainly used for external surfaces of civil buildings and industrial buildings. This is especially true for new houses that are still settling. But sometimes premises are also treated in this way. In this case, it is necessary to distinguish between the types of reinforcing material for external and internal work.

The cellular material can be fiberglass, polymer or metal. It all depends on where it is used. To the grids under interior plaster have their own demands. Such material must be resistant to alkaline attack. For this reason, it is impregnated with a special solution. If this is not done, then over time cracks will appear on the cladding. This means that the base has decomposed and the plaster layer has lost its strength.

In addition to impregnation, the mesh for plastering internal walls must maintain strength and elasticity. According to SNiP, its density must correspond to the parameters 150-170 g/m2. This will give it the ability to withstand mechanical, wind and other loads experienced by the building as a whole. Usually to protect the walls of the first floor by builders when performing plastering works metal mesh is used.

What type of mesh is used for plastering interior walls?

Plaster layer on concrete, brick and wooden facades cracks and peels off. To avoid this, the walls are reinforced with mesh. There are 4 types of metal mesh:

• Woven mesh is a flexible and incredibly durable material. Its structure consists of woven wire different sections. Ideal for DIY wall decoration. Has square cells 1×1 cm with zinc coating. Sold in construction stores rolls.
• Chainlink or woven mesh Suitable for strengthening multi-layer plaster. Cell size 2 cm.
• Welded mesh with square cells is made by spot welding intersecting wires located perpendicular to each other. Low-carbon, polymer-coated or galvanized steel wire is used for production. Designed to prevent cracking of the finishing layer during the period of active settlement of walls. To prevent cracks in the plaster, a mesh with 2/3 cm cells is used. It is sold in rolls 1 meter wide.
• Expanded metal mesh is produced by pressing from sheet metal. First, holes are cut, and then the sheet is stretched to obtain diamond-shaped cells arranged in a checkerboard pattern. Apply under a small layer of solution. Rolls can be of different lengths, but standard width at 1 meter.

Under a very thin layer, a polymer mesh or fiberglass element is used, most often when needed or, as it is also called, “Venetian”. This type the material has increased resistance to various kinds chemical influences and does not spoil the final coating with stains during use. Methods of attaching such meshes can be different. If the wall is concrete or brick, then you can apply a little mortar to it and press the reinforcing material into it. On wooden or porous surfaces, you can fix the net using a stapler.

Preparation and start of finishing work

Before you start decorating the walls, you need to prepare everything you need: tools, remove debris, think and decide which type of mesh is best to use.

Important: metal mesh is best suited for applying mortar with a thickness of 3 cm or more. Chain-linking is used when reinforcing walls that have not previously been plastered.

So, after you have everything prepared, you can begin to complete the five steps.

1. Measure the height from floor to ceiling. Lay out the mesh and use metal scissors to cut the required number of panels.
2. Straighten and attach the mesh to the primed surface with nails or screws. At the same time, do not forget that the canvases should overlap with a width of 10 cm.
3. Prepare. Add an antiseptic to it so that there is no mold on the plaster in the future.
4. Apply a preliminary layer of mortar with a trowel, then level it using the rule. Allow the fresh plaster to set, then apply a leveling layer. Because it is thinner, it should be spread directly with a grater. To do this, take a small amount of the mixture work surface tool and, pressing it against the wall, pull it from bottom to top. If the mesh is visible, repeat the procedure.
5. Let it dry, then cover the uneven areas with a spatula and rub these areas with a trowel. After hardening, clean up any uneven surfaces using fine sandpaper or a sponge moistened with water.

When plastering using polymer types grids, the solution should be applied from the middle to the edges of the canvas, as if you were gluing wallpaper and expelling the air from under it. Nets made of polymer materials are elastic and stretchy. When working with them, you need to be careful and make sure that no bubbles appear on them. Now, depending on what the plaster was done for, you can either paint it or do decorative cladding.

Plaster facing

Wall painting has become the most widespread. Before you begin this type of cladding, you need to evaluate the quality of the surface: remove all cracks, make sure that the plaster layer is strong and does not lag behind the wall surface. After the putty has dried, it is necessary to treat the surface before painting with a water-based primer.

Be careful when choosing the paint you are going to use to paint the plaster.

Remember: fresh plaster, as a rule, has an excess of alkali, so it is highly undesirable to use compositions containing solvents. Please note that the plaster must be protected with a synthetic primer before using organic soluble paints.

It is best to use a roller to paint walls. The surface must be treated carefully, not leaving any gaps, and after the coating has dried, it should be painted over again. Acrylic, alkyd and latex compositions are best suited for painting facades.

No less popular finishing method interior spaces wallpaper. To prevent them from peeling off, you need to properly prepare the plastered surface. Remove all old wallpaper from the walls and make sure the plaster is holding up well. Then the cleaned surface should be washed with water and inspected for cracks. If you find them, they will need to be puttied and given time to dry. Then treat such areas with fine-grained sandpaper.

The choice of wallpaper glue depends on the type of wallpaper and the surface on which you are going to stick it. Usually there are instructions on the rolls with recommendations on which glue is best to use. In general, the technique for gluing plastered walls is not much different from the technique for other surfaces.

Without knowing how to do this or that type of repair, you can not only waste a lot of time and effort, but also ruin expensive materials. We hope that the tips given in this article will help you carry out repairs correctly and avoid many mistakes.

Anyone who has worked on wall finishing knows that when applying a thick layer of plaster, the material may not be able to withstand its own weight and begin to peel off from the wall surface. To prevent this from happening, a reinforcing mesh is used. It is mounted on the wall and takes on part of the load.

In what cases is a mesh needed?

If the walls are plastered without a mesh, there is a possibility of the material peeling off under the influence of its own weight. Thanks to the reinforcing mesh, it is created monolithic slab, which can withstand any load. For plaster of different thicknesses, different meshes are created, designed for a specific load.

The use of a mesh makes it possible to form a durable layer of mortar, on which cracks will not appear even with prolonged use of the room. This result cannot be achieved without the use of the described products.

It is worth noting that even with improper mixing or non-compliance with the temperature level, the mesh helps maintain the integrity of the plaster. There are special meshes for facades that are not subject to corrosion.

Types of grids

On the market building materials You can find many varieties of meshes on which plaster is applied. In order not to make a mistake when choosing, it is worth considering the main types of such products and their features:

To choose from the proposed options, it is enough to determine in what conditions the mesh will be used. If you need to plaster the facade, it is better to buy metal or fiberglass products with large cells. When applying compounds to interior walls, you can use a plastic mesh.

How to attach the plaster mesh

To understand how to properly attach the mesh to the wall, it is worth considering the two most popular types of mesh - fiberglass and metal. It is much easier to secure the first named type of product, since for this you only need to screw in several screws at an equal distance from each other. Such fastenings are sufficient to securely hold the mesh.

To keep the mesh more securely, you should roll it out across its entire width in one piece, without dividing the product into several. Vertical beacons are installed at a distance of about two meters from each other during installation. After the mesh is hung on the screws, the thrown plaster seals it to the wall, so additional elements no fastenings needed.

The installation process for metal mesh is slightly different. This is due to the fact that under its own weight such a product is not able to be securely held on the mounts. Also, the cells of metal mesh are large and require additional fastening with mounting tape.

To secure it, you only need to cut off part of the mounting tape so that it can completely cover one cell. After cutting the mounting tape, it is fixed to the wall with self-tapping screws. You need to calculate the distance between the fasteners in such a way that the mesh does not sag on any section of the wall.

Surface preparation

Before you start plastering the walls, you need to clean the surface of dirt and old finishing materials. After finishing works there should not be any on the surface additional materials, as they can cause peeling of the plaster.

After cleaning the surface of the walls, it is necessary to apply a primer. Such compositions increase the strength of the wall and improve the quality of adhesion. They also prevent mold and corrosion. The primer helps the surface dry quickly and promotes better absorption of compounds that are applied after it.

Applying plaster

After preparing the surface and fixing the reinforcing mesh to it, plaster is applied in several layers. To properly apply the composition to the surface, you should consider the features of creating different layers:

First layer. Plaster is usually applied in two or three layers, depending on the material of the walls. Concrete, for example, requires three coats. The first of them is called “spray”. The plaster at this stage has a creamy consistency and is thrown onto the wall surface in any order. The composition can be spread, but throwing it on allows you to speed up the process. After applying plaster to a certain area of ​​the wall, you need to wash the tool. After casting, the composition is leveled with a two-handed spatula from bottom to top.

Second layer.

Third layer. At this stage, you need to level the composition more carefully so that no errors remain on the surface of the walls. Before applying the finishing layer, you need to wet the surface of the plaster.

This mesh plastering technology is universal and can be used when working with walls made of various materials.

The final stage of work

After the plaster has completely dried, it must be prepared for fixing finishing materials. To paint and wallpaper, just sand the surface with sandpaper. If there are noticeable unevenness on the wall, you need to start using the largest brand of paper. For ease of work, a piece of product is clamped on a grater. Grinding is done in a circular motion with little effort so as not to create new defects on the surface.

When the wall becomes uniform, you need to change the brand and continue grouting. If the surface will be painted, you need to take P120 paper. During the entire process, you should use goggles and a respirator to protect yourself from dust.

Since it is quite difficult to grind the surface in the corners, it is worth working either without a grater or using bars with sharp corners. If you want to make the work process easier and faster, you can purchase electric grater. But to treat the walls of one apartment, it is not profitable to buy such a product. After sanding, you need to sweep away the dust with a brush.

Applying plaster under wallpaper and painting

Before starting work, you should determine exactly how the room will look and what will be used as finishing materials. If you choose wallpaper, you need to determine its type and thickness in advance. If they are thin, you need to apply several layers of leveling plaster. This will allow you to hang the wallpaper without any unevenness or bubbles.

For the room in which wallpaper will be hung, it is better to purchase ready-made dry mixtures, since using them you can prepare higher-quality plaster.

If plastering the wall surface occurs before painting, you should carefully prepare the wall, without leaving even small irregularities on it. The whole process is carried out in several stages:

• first, a leveling layer is thinly applied;
• then, if necessary, two more layers are applied to eliminate defects;

Knowing how plastering is done on a grid allows you to act skillfully when there is a risk of the mortar slipping. To prevent this from happening, the wall is strengthened reinforced material. Is mesh needed when plastering? It is simply necessary as a reinforcing layer.

The solution on the walls is retained in the cells of the canvas and does not flow down. After the applied mixture hardens on the surface of the walls, a durable, durable coating is formed. A layer of plaster 10 mm thick can be dispensed with without reinforcement. For thicker coatings, installation of reinforcement is required.

Modern mesh plastering technologies use several types of reinforcing materials:

• fiberglass;
• polymer;
• metal.

Fiberglass

Fiberglass mesh for plaster is a thin, fine-mesh fabric.

Wall plaster using a grid of this type is applied to indoor walls. Fiberglass sheets are attached to surfaces that do not require special leveling.

Typically, such a mesh is covered with a thin layer.

Polymer

Recently, plastic has become very popular. Polymer fabrics in their own way bearing capacity in some cases they are equivalent to metal reinforcement, and the cost is an order of magnitude lower.

On sale you can always find a polymer mesh with various sizes cells and thickness. With its help, you can level walls with surface deflections of up to 20 mm per 1 linear meter.

Metal

Metal mesh for plaster is used mainly for finishing facades. Metal reinforcement is used to strengthen the surfaces of fences with complex geometry, deflections of more than 20 mm per 1 linear meter.

When working on metal, cement-based mixtures are mainly used.

Metal coatings are produced in several modifications:

1. The woven structure of the coating is made from thin wire. Woven fabric covers the walls both inside and outside of buildings. The usual cell size is 10x10 mm.
2. Wicker reinforcement is also called chain-link mesh. It is very convenient to use when reinforcing large areas. Standard size cells - 20x20 mm.
3. Welded sheets are made by spot welding metal rods. Welded reinforcement is used for significant shrinkage of buildings and structures. The cells of such reinforcement are made in sizes from 20x20 mm to 30x30 mm.
4. Expanded metal reinforcement is made by stretching metal sheet, pre-cut through with transverse notches. When stretching the sheet special machine the canvas forms diamond-shaped cells. Reinforcement of this type not only withstands thick layer plaster, but also significantly increases the load-bearing capacity of enclosing structures.

Plastering over metal mesh forms the most reliable and durable layer of wall finishing than using reinforcement made from other materials.

Installation of grids

Each type of reinforcement, taking into account the characteristics of the material. More about types construction mesh watch in this video:

Lightweight plaster mesh does not require special fixation.

Fiberglass mesh for plaster is secured around the perimeter with a mortar rubbed in with a spatula.

The strips are connected to each other with an overlap of 150-200 mm, for which, before starting work, the mesh is cut into strips taking into account this overlap.

When especially complex configuration The surfaces of the walls are additionally secured with dowels. If the stripes are placed on wooden surfaces, then it is convenient to do the fastening with a stapler.

Coating with polymer sheets

Plastic sheets are attached in some cases in the same way as. In other fastening options, they resort to the use of dowels and self-tapping screws. The material is attached with an overlap, placing one strip over the other by 150-200 mm.

Metal coatings

Metal plaster mesh can withstand fairly thick layers of finishing. Due to the fact that such reinforcement has a significant specific gravity, the fastening of metal reinforcement must be especially reliable. Installation metal coating walls are performed as follows:

1. The pre-reinforced coating is cut into fragments of the required size, not forgetting about overlaps when connecting the mesh overlapping.
2. If the canvases have been stored in a warehouse for a long time, they are treated with a solvent or rust reducer.
3. Thin coatings are cut with metal scissors. Welded and expanded metal sheets are cut with a grinder equipped with a metal cutting wheel.
4. The mesh is fastened with dowels. To do this, holes are drilled in the wall (if the wall is concrete, then this is done with a hammer drill). Plastic dowels are inserted into the holes.
5. Reinforcement begins from one of the upper corners of the wall. Having attached the mesh to the wall, screw the screws and washers into the dowels. The washers act as fasteners.
6. A distinctive feature is that during such work the canvases are fixed in such a way that there is a small gap of 3-5 mm between the reinforcement and the wall. This is necessary to place reinforcement in the body of the plaster layer, which gives the wall decoration greater solidity and high load-bearing capacity. Detailed description Watch the process in this video:

The reinforcement must be secured in tension and not bend. Otherwise, voids may form in the body of the finish, which will negatively affect the load-bearing capacity of the plaster.

Installation of beacons

When the reinforced sheets are fixed to the fence, guide strips (beacons) are installed to move the rules along them. The rules are made from a piece of metal profile 1 to 1.5 m long.

The guide strips are fixed with gypsum mortar. The ruler controls the level of the beacons.

Plastering walls

Fences with mesh are plastered in 2-3 layers.

The work is carried out in the following order:

1. The first layer is applied using the cape method. The mortar collected on a trowel is thrown onto the fence with a sharp movement of the hand. To do this, use a mixture with a consistency reminiscent of liquid sour cream. This method of applying the solution allows you to obtain a dense, durable layer of plaster.
2. After the first layer has “set”, the next layer of plaster is applied. The second layer is made from a denser mixture - a dough-like consistency.
3. Plastering is done from bottom to top. The thrown solution from below is picked up by the rule and brought up. As the rule moves, it is slightly alternately shifted from side to side. This helps to distribute the mixture evenly over the wall surface.
4. After the plaster has dried, the beacons are removed. The remaining clearings are sealed with mortar.
5. At the end of the work, the surface of the walls must be grouted. To do this, take a liquid mixture. Using a wooden grout or trowel in a circular motion liquid solution rubbed onto the plastered wall, thereby finally forming the finished surface of the wall.

Repairs are often accompanied by leveling the walls using plaster. In addition, it also improves thermal insulation and reduces the level of extraneous noise in the finished room. Surfaces plastered with decorative mixtures have a beautiful appearance. When the unevenness is small and there are practically no defects, then the solution is often simply applied to the prepared base. If the deviations are large and there are cracks, then a plaster mesh must be used to reinforce the walls. It is represented by a wide range, which allows you to select products for specific operating conditions.

Area of ​​use

Reinforcing mesh for plastering walls has replaced old methods (shingles, driven nails) used to improve the adhesion of the finishing layer to the base surface. It is made from materials that differ in their properties. There are a large number of products on the market different manufacturers.

Used for both interior and exterior work. It is the basis of the leveling coating. The latter as a result becomes stronger and more durable. The mesh should be used to avoid the appearance of peeling, cracking, or to stop the process of crack growth itself.

Construction mesh for plaster is used to qualitatively prepare the base for further measures to decorate work surfaces. At correct installation and further plastering, it extends the service life of the finish and helps maintain the integrity of the partitions.

Types of plaster mesh

Reinforced mesh for plaster differs in the materials used for its production, the structure and size of the cells, and the methods of creation. According to the first criterion, the following varieties are distinguished:

• plastic;

Products have all the advantages and disadvantages of the materials used to produce them.

A more detailed classification is presented in the table below.

The existing assortment allows you to select high-quality products taking into account all requirements. The use of a material that meets existing conditions determines the durability of the finish.

Selection of working material

The main determining factor when selecting a material is its suitability for specific conditions, so the mesh for plastering walls is selected taking into account the following number of factors:

• the required thickness of the created finishing coating;
• kind plaster mixture which one is used;
• type of base (concrete, wood, brick, porous materials, stone);
• external conditions in which the formed plaster layer will be located: outside the building, inside, or in unheated, damp rooms.

Plaster using the following types of mixtures:

• cement-lime;
• gypsum;
• cement-sand;
• clay and others.

Various additives are often added to such compositions. They, together with the main components, have a certain level of chemical activity. Which determines the degree of their influence on different materials, from which the mesh for reinforcement is made.

Taking into account the above provisions, the main recommendations for choosing a mesh for plastering walls are as follows:

• It is recommended to use glass fabric products when the thickness of the created layer of plaster is up to 3 cm, when there are also depressions and cracks to stop the expansion of old ones and the formation of new ones;
• if the height of the coating being formed exceeds 3 cm, then a more appropriate option would be metal: it can withstand the weight of the finish without peeling off;
• It is better to use plastic products for small thicknesses gypsum solutions, and, for example, cement-sand compositions over time, such reinforcing material corrodes;
• when using clay-based mixtures, also when there are significant irregularities on the surface of the base, metal options are relevant;
• plastic sheets with small cell sizes (for example, 0.2-0.3 cm) are used during finishing putty work;
• fiberglass or galvanized (ordinary metal ones are not suitable), products are good way reinforce rooms with high humidity;
• when there is a need to plaster the stove with a cement-clay mortar, then you can use chain-link, and if it is a thin layer, fiberglass;
• steel products are suitable for joint use with compositions containing cement;
• When carrying out plastering work on finishing the external walls of a house, a material with cells of 3*3 cm is usually used, and larger sizes are selected to tighten the surface;
• For internal work, the material is mainly used in rolls, and for external work, in the form of sections.

When the height of the created layer of plaster does not exceed 2 cm, then reinforcement can be omitted. Following the recommendations outlined above will allow you to choose the most practical material.

Features of installation of different types of mesh

Metal mesh for plaster, fiberglass or plastic, can be mounted using different ways. The choice of fastening option is determined by the composition of the working mixture, the material from which the mesh is made, and the plastering technique used. Fix with:

• self-tapping screws or dowel-nails, screws.

The first layer of plaster to level the walls is reinforced by pressing the mesh into the solution of the required thickness applied to the surface.

The optimal way to create a finishing coating (covering or decor) is to secure the adhesive fabric to a dry base with special fasteners.

When the area to be finished is small, then you can use the working mixture for fixation, applying it pointwise.

It is enough to simply fix the painting mesh with a thin layer of solution.

The fiberglass sheet is mounted according to the following optimal algorithm:

• carry out markings for the installation of beacons;
• holes are drilled along it, into which dowels are then inserted;
• align the screw heads according to the level;
• apply the solution to an area equal to the width of the fabric used;
• immediately apply a mesh to the plaster, threading screw heads through it;
• add the mixture further;
• overlap (10 cm) fix the next strip;
• This continues until the entire room is reinforced;
• install beacons.

The solution should be smoothed evenly over the canvas, starting from the middle of the strip, moving towards its edges. When creating a thin layer, it pays to secure fiberglass to staples and then apply putty.

The metal plaster mesh is attached in the following sequence:

• cleaned of lubricant composition by rinsing with water or wiping with a damp cloth;
• use metal scissors to cut the canvas into pieces of the required size;
• drill holes with a diameter of 6 mm for dowels every 25-30 cm (about 3 mm deep than the length of the plastic part of the fastener), insert them;
• Using screws and mounting tape, secure the material to the surface;
• the following fragments are laid with a 10 cm overlap;
• install beacons.

The minimum height of the created coating depends on the thickness of the mesh wire. Metal products additionally strengthen the base, and fiberglass products reinforce the plaster with mesh.

Methods for securing the plaster mesh are discussed in detail in the video below.

The installation of facade fiberglass material is shown in the video below.

Strengthening the base, increasing strength and reliability plaster finishing- all this is ensured by the creation of an adhesive layer. It is formed using different materials.

For correct execution When reinforcing walls with mesh, it is necessary to take into account the type of mortar used, the installation location (outside or inside the building), and the expected height of the coating. Also required to use suitable technology installation Compliance with the listed conditions allows you to plaster walls or ceilings with high quality, minimize the possibility of cracking, and not be afraid of shrinkage of the house.