Reinforced plaster. Facade reinforcing mesh. Metal mesh mount

Walls and ceilings are plastered once and for many decades, during which the finishing layer survives many cosmetic repairs(repainting, re-gluing wallpaper, cladding, etc.), therefore, so that cracks do not appear on the walls, the quality of this type of workmanship finishing works(and before that –) should be at the highest level.

However, there are factors due to which the plaster cracks after barely standing for a year, and the quality of its execution can be impeccable. This may be caused by shrinkage of the house or powerful vibration loads.

Therefore, today, reinforced plaster is increasingly being used, the high-strength layer of which is able to withstand loads and not crack, or at least prevent cracks from becoming visible to the naked eye.

This is the most ancient method of strengthening a plaster layer, with the exception of hay, which was added to a clay “mud” for plastering rural huts. The mesh was also stuffed onto concrete and wooden surfaces, because without it, traditional compositions (cement, cement-lime, lime) would not adhere to the walls and ceilings of such surfaces.

In the old generation of building materials, the reinforcing mesh for plastering walls was the same chain-link that was also (and still is) used for fencing. However, today, using new technologies, the following modern materials are produced for reinforcing the rough finishing layer:

• welded mesh;
• PVS mesh (expanded-extraction);
• special plaster chain-link mesh.

For cement-sand and cement-lime plaster of the facade, which is not planned for cladding, it is best to use a galvanized mesh. This coating protects it from corrosion when the plaster layer gets wet and moisture seeps into the thickness where it is located. Thus, there is no risk of rust stains appearing on the front surface of the plaster.

Welded mesh

Represents roll material, made of thin wire, welded at the intersection points. The mesh used to reinforce the plaster must have cells ranging in size from 12.5x12.5 mm to 25x25 mm with a wire thickness of 0.6-1.6 mm.

The larger the layer of plaster, the thicker the mesh wire should be. However, with very large layers, this mesh is unlikely to give a significant effect.

There is also a welded reinforcing mesh, also called masonry mesh - piece product rectangular shape. It is made from VR-1 wire, which has a cross-section of 3-5 mm and a periodic profile, that is, notches every 2-3 mm, which increases adhesion inside the plaster layer. It is used for reinforcing brickwork and concrete floor screeds, but it was also used in special cases of restoration work.

In case of large unevenness of surfaces of 5 cm or more, as well as instability of these surfaces (flowability, cracking), in order to obtain durable plaster, it has become relevant to use reinforcing mesh with a cell of 50x50 mm. However, it is rather folk method reinforcement of plaster, because such irregularities cannot be plastered using any technology.

Expanded mesh

Presented in the form of a roll material with a special advantage: expanded metal mesh is made from metal sheet in such a way that it is one-piece and not welded. It also has a diamond-shaped cell, which helps to better retain the solution freshly laid on the surface.

Unlike welded mesh, expanded metal mesh has parameters such as thickness and cutting pitch (lintels). Its thickness is equal to the thickness of the metal sheet from which it is made: 0.5-1.2 mm. The cutting step is the second parameter of the thickness (more precisely, the width) of the core that forms the cells.

Most often, reinforcement of plaster with PVA mesh is carried out in the case of a large layer thickness (from 3 cm), or when plastering smooth surfaces, For example, concrete slabs. The most popular sizes are 25x50 mm and 17x40 mm.

Rabitz

The special plaster chain-link mesh differs from the others in that it is a woven fabric that is not subject to rupture at welding points or monolithic junctions of cores.

Thus, it is considered the most durable of all existing types of reinforcing plaster mesh. For finishing rough work, use a fine mesh netting 20x20 mm.

It is worth noting that it has not only the thickness of the wire, but also the volume, due to which it occupies a greater thickness of the plaster, thereby better accepting tensile loads in it. But at the same time, it is more difficult to work with it, since when throwing the solution onto a surface with a packed chain-link, it works like a sieve, that is, it cuts the solution before it passes through it and adheres to the surface of the wall.

In addition, it is springy, so a layer of spray - a liquid layer of solution, which is almost never done now, is simply necessary to fix this mesh. Therefore, although strengthening plaster is best done with this material, builders are in no hurry to recommend it, since the plastering process is much more complicated. Plus it is not suitable for thin layers around 12mm thick.

Reinforcement of the plaster layer with polymer and fiberglass meshes

Along with new building mixtures, a new generation of reinforcing materials for finishing has arrived.

Made from polymer materials or fiberglass, they weigh little, are convenient to transport and work, and are cheaper compared to metal mesh for plaster.

That being said, non-metallic reinforcing materials for plasters have very high tensile strength, unlike metal, which weakens and stretches over time. Not to mention corrosion and reaction in alkaline conditions finishing layer. Today there are such new generation non-metallic plaster mesh:

• polyurethane mesh;
• polypropylene mesh;
• fiberglass mesh.

Due to the lightness and plasticity of such meshes, reinforcement for plaster is carried out without any fasteners to the wall. The first layer of solution is applied, onto which the mesh is immediately applied and lightly pressed down with a spatula or metal trowel. Next, after drying or immediately on the damp layer with a recessed mesh (if the layer is small), apply a second layer of solution.

As can be seen in the table, there are practically no differences in technical characteristics with the same cell sizes, however, there is a difference in application from the produced cell sizes. Let's consider what types of plaster mesh are suitable for certain jobs.

Polyurethane mesh

Otherwise called “universal”, it has several versions. In addition, the name speaks for itself; universal polyurethane mesh is suitable for many types of construction work; it can be used to reinforce almost any type of finish.

Universal small is produced with a cell size of 5x5, 6x6 and this is most suitable reinforced mesh for plastering the facade and interior in small layers of 5-15 mm of dry starting mixtures based on gypsum, lime, cement. This type of mesh is not suitable for work on reinforcing traditional plaster compositions.

The universal average has a cell size of 13x15 mm. Unlike fine mesh, it has a narrower application: device reinforced plaster medium thickness (up to 3 cm) layer inside and outside buildings. Here we are talking about modern dry mixes and traditional cement/lime/gypsum compositions.

The universal large one has a cell of 22x35 mm, is intended for reinforcing large areas of walls and ceilings that will be plastered with medium and thick layers. The mesh can be used to reinforce old and new generation plaster compositions.

Polypropylene mesh

Just like polyurethane, polypropylene mesh is a product made from a polymer derivative - a composition based on petroleum products.

It has a wide range of applications in finishing, thanks to the variety of three production options discussed below.

Plurma mesh is the finest mesh of the polyurethane line (5x5, 5x6, 6x6 mm). Therefore, the reinforcing plaster performed should have a small layer of 5-15mm. In addition, only the use of modern dry construction mixtures is allowed; traditional compositions cannot be reinforced with Plurma mesh.

The Armaflex mesh is produced with a cell size of 13x16.5 mm and has very high tensile strength, due to the amount of polypropylene fibers in the mesh threads, as well as reinforced dressing. Application – reinforcing plaster of medium and large layer thickness outside and inside premises, including large areas, using both modern and traditional compositions. It is especially popular during restoration work.

The “Syntoflex” mesh is the most diverse of the polypropylene “family” in terms of cell size: “Syntoflex D” - 22x35 mm, “Syntoflex E” - 12x14 mm; "Syntoflex M" - 17x24 mm. The scope of application is similar to the Armaflex mesh.

Fiberglass mesh

According to the purpose for plastering, it is divided into facade and interior. Both of them have a cell size of 5x5 mm, but there is a difference in the density of the glass fibers and the presence/absence of special reinforcing impregnation.

The façade mesh is impregnated, which increases resistance to atmospheric influences. If the plaster layer gets wet, it does not collapse and does not absorb moisture.

In addition, the reinforcing mesh for plastering facade walls has a density of 160 g/m2, which means it has high tensile strength. However, they are appropriate when working with modern materials– dry mixtures with high plasticity. This also applies to interior fiberglass mesh.

Reinforced meshes are also available for concrete works, which have cell dimensions of 10x10 mm. There are fiberglass mesh with a density of up to 451 g/m2, which can be used to reinforce plaster on complex and large surfaces with unevenness of 5 cm or more.

Reinforcement of the plaster layer with special additives for mortars

The most basic (using traditional technologies) contains one or two binder components (cement/lime/gypsum) and sand filler.

This composition has elementary properties mortar, however, reinforced plaster without the use of metal, plastic or fiberglass mesh can be obtained from it if special reinforcing fillers are added to the composition.

These components are thin fibers of short length (mostly 1 cm for finishing solutions), made from various materials, most often waste from one or another industry, and not necessarily from the construction industry. Also called fiber, they come in several varieties (for plastering works) depending on the material from which they are made:

• metal fiber;
• basalt fiber;
• polypropylene fiber;
• fiberglass fiber.

Fiber is added during the preparation of the solution, where it, mixed with the other components, intertwines and creates a solid, evenly saturated mass. Its operating principle is similar to the operation of reinforcing mesh: the fiber fibers in the plaster layer take the load from rupture, and unlike the mesh, the reinforcement goes in all directions.

Metal fiber

It comes in many varieties, but reinforcing plaster based on it is best made from the smallest anchor fiber with a diameter of 0.3 mm and a length of 10 mm.

The pieces of metal wire that it represents have bent or flattened ends, which allow for maximum adhesion and binding in the plaster layer.

This material was used for special cases, during the restoration of huge irregularities, unstable wall surfaces, as well as for the production of special impact-resistant plaster. It is best to plaster with a solution based on metal fiber over a pre-filled large reinforcing plaster mesh.

The disadvantages of metal fiber are that it greatly weighs down the plaster solution, which requires additional measures for fixing to the wall surface (presence of mesh). It is very expensive, especially if galvanized or alloy steel fiber. If you take simple fiber (not alloyed, not galvanized), then when it gets wet, corrosion is released onto the surface of the plaster.

Basalt fiber

It is made from natural volcanic glass fibers. Fibers 12 mm long are used in all types of work, including plastering. They look like glass needles, smooth, coated with a lubricant - a substance that makes it easier to prepare a solution with basalt fiber.

This additive to the solution does not weigh it down as much as metal fiber, and the resulting high-strength plaster does not corrode and is resistant to chemicals (if other components - the binder and filler) are also stable. It is used for both ordinary and special plaster– fire-resistant, water-resistant and acid-resistant.

The disadvantage of basalt fiber is low adhesion inside the plaster layer, this is due to the smoothness of the surface of the fiber needles. The strength is less than that of a metal fiber composition, but there is greater durability and resistance to weakening and stretching over time.

Polypropylene fiber

This is a modern generation reinforcing additive for fine-grained types of concrete; especially popular for use in finishing solutions for screed and plaster.

A derivative of oil refining products - polymers, this is due to their low weight and resistance to chemical and atmospheric loads and the absence of corrosion.

This material has a high elongation coefficient, which, combined with low strength, makes the reinforcement of plaster with it not as reliable as with other fiber materials. The low melting and ignition threshold does not make it possible to use plaster with polypropylene fiber in conditions high temperatures(fireplaces, boiler rooms).

However, polypropylene fiber has a higher concentration of fibers per unit weight, and is also distributed more quickly and evenly in the solution. It is more suitable for reinsurance against microcracks in finishing layers; it is effective with a small thickness, no more than 5 cm.

Fiberglass fiber

This is also a new generation of material obtained from artificial alkali-resistant glass.

With the help of glass fiber, the best reinforcement of plaster for ordinary purposes is obtained, giving it special qualities: strength, increased adhesion and ductility.

When glass fiber is introduced into a cement-based plaster mortar, its better plasticity is observed. This is due to the fact that small glass fibers absorb the liquid and inhibit the separation of the solution into cement laitance and filler. Also, when applying a composition with glass fiber, it releases moisture into the wall, thus, the solution is better drawn into the pores.

The characteristics of the finished plastered surface are similar to those of compositions based on basalt fiber, and in some cases superior to them. The quality of glass fiber is mainly dictated by the brand of the raw material - artificial glass. Here it is important to choose an alkali-resistant brand of glass fiber, since cement and/or lime-based solutions have high alkaline activity, which will dissolve fiber that is not intended for such conditions.

This was a description of materials for reinforcing plaster, and the finishing process itself with the reinforcement device is a separate topic. In the "" section you can find other finishing types works

Reinforcing mesh for plastering walls - modern version strengthening the plaster layer. Its use allows you to form a very strong, durable layer of material. Then no cracks will form, the surface will look perfectly smooth and of high quality.

Today the market offers two options to choose from - mesh for plaster
made of metal and polyurethane mesh. Each has its own characteristics and its own scope of application. And, in turn, is divided into several types:

Masonry mesh(painting), made of plastic (polymer), with cells of five by five millimeters; it is used for finishing brick walls inside and outside buildings; it is suitable for plastering with gypsum mortar, where there is no cement; The colloquial name for such material is painting mesh.

Universal small– it is made of polyurethane; the side of its cell is six by six millimeters; This 20 mm woven mesh for plastering is used in combination with mixtures for finishing and plastering; this material is suitable for interior decoration premises.

Universal mesh medium– its cells are rectangular, 14 by 15 millimeters; it is commonly used to create building interiors.

Universal large with cells whose sides are 22 and 35 millimeters; it is convenient to use when finishing spacious premises, for example, warehouses or production workshops; This is a suitable mesh for plastering façade walls; it tolerates loads and temperature changes well.

Fiberglass mesh, which is made of fiberglass pre-treated with a special method; its cell size is five by five millimeters; This material withstands low and high temperatures, exposure to precipitation, and is also not affected by chemicals, which makes it the best option using cement mixtures; has very high strength characteristics and can “work” anywhere; This is a good facade mesh for plaster.

Plurima, which is a biaxially oriented structure; its material is polypropylene; the sides of the cells are five by six millimeters; does not react to the action of chemical compounds; very light; used for indoor and outdoor work.

Armaflex made of polypropylene, having reinforced connections with cells of 12 by 15 millimeters; its advantage is its ultra-high strength, which allows the use of such a product when creating a thick layer of mortar; This suitable material for the formation of a reinforcing layer of facade plaster.

Syntoflex mesh, polypropylene, with two types of cells: 12 by 14 and 22 by 35 millimeters; it is distinguished by its lightness and inert properties with respect to the chemical effects of various substances; used both inside and outside buildings for various purposes; This is an ideal mesh for plastering exterior walls.

Steel mesh– these are rods connected by soldering at the intersection points; There are many cell options; suitable for heavy loads when it is necessary to form a layer of large thickness.

Galvanized mesh, which is made from galvanized metal rods; cell sizes vary; very durable and used for facades and interior interiors; one of the most popular types of reinforcing mesh on the Russian market.

Mesh fastening.

On the wall or ceiling, the reinforcing mesh for plastering walls is attached in different ways, the choice of which depends on the type of mesh and the composition of the plaster:

• the solution itself can act as a fastening:
• Self-tapping screws or self-tapping screws can be used.

The specific choice is also determined by the method of applying the mixture. So, if the covering method is used, the mesh for plastering the walls can be attached to the first plaster layer.

When using a spray, it is convenient to first attach it to the wall, and then fill it with the plaster mixture. At the same time, you should carefully monitor that the solution adheres well to the surface to be finished.

It is believed that the optimal method is when a reinforced mesh for plaster is pre-attached to a dry wall using screws, self-tapping screws and other devices. And then the mixture is applied in an even layer over the entire surface to be finished.

When is mesh used for plastering walls?

Experts advise paying attention to several decisive moments when deciding whether to use reinforcing mesh or not.

1. First, understand how thick the mortar layer is supposed to be on a specific wall or ceiling surface. This is important because the thickness of the construction mesh depends on this factor. To do this, take the following measurements: find the most protruding point on the wall or ceiling. One of the levels is used - laser or construction. Then they look for the “lowest” place. Determine how thick the plaster layer needs to be applied.
2. When the layer of mortar is no more than twenty millimeters, and there are no rusts or significant protrusions on the ceiling or wall, reinforcement does not need to be used - the mixture can stand on its own.
3. With a layer thickness of twenty to thirty millimeters, reinforcement will be needed. Without it, the coating may peel off over time and cracks may appear. A polymer mesh or fiberglass mesh is suitable. It will prevent cracks from forming on the finished surface of the dried mixture.
4. A layer of more than thirty millimeters requires the use of metal material. This will help avoid peeling of the plaster under its own weight.
5. If measurements have shown that to level the surface it is necessary to apply the solution in a layer of fifty millimeters or more, it is better to choose another material: instead of plaster, use, for example, plasterboard or stretch ceiling, or other materials. They will allow you to hide significant depressions and protrusions.
   Is a mesh needed when plastering aerated concrete? To ensure that the mixture adheres well to the foam blocks, it is better to use it.

Installation work.

The installation process is divided into several steps.

First of all, the surface to be plastered is degreased and coated with a special primer. This is necessary to ensure good adhesion of the mortar to the wall or ceiling.

Then the chain-link mesh for plastering walls is cut into sheets to make it easier to work with. It is worth considering that along the joints of walls or rustications on the ceiling, reinforcement should be placed in the form of solid sheets. In this case, it is good when the edge touches the adjacent wall or the bend of the wall is ten to fifteen millimeters. This strengthens the corners. It is very important to make a right angle with plaster.

Each type of construction mesh for plastering uses its own technology. For example, fiberglass material is attached to the first layer. Press it in a little, then apply next layer. The fiberglass mesh for plaster ends up inside the plaster layer.

To ensure that the facade fiberglass mesh under plaster holds firmly, some experts prefer to use different fastenings - screws and self-tapping screws. First, the surface is marked at the rate of sixteen holes per square meter.

Then holes are drilled at selected points where dowels or screws are placed. So that their caps protrude slightly above the wall or ceiling. Spread the first layer plaster mixture. Put a net on the hats. Cover with plaster.

An important point is that it is better to apply the mixture throughout the entire space, but it is worth distributing it starting from the middle - in different directions. At the same time, the edges of the canvas are pressed at the corners wide spatula. And the second spatula is used for smoothing.

When plastering the ceiling, it is suggested to first make holes, then insert fasteners into them. After this, glue the plaster fittings to the ceiling with mounting tape. This option is suitable if lightweight material is used. Then metal ones are placed plaster beacons. The mixture is applied. It is important to ensure that it fills the cells and adheres to the surface of the ceiling.

Metal mesh.

Metal mesh for plastering walls, as already mentioned, is used when it is necessary to make a layer of mortar of thirty millimeters or more. It is better to choose galvanized material with cells of ten by ten or twelve by twelve millimeters.

An expanded metal mesh with a cell size of 10 by 25 millimeters is also suitable.
Before starting to work with metal reinforcement, experts recommend degreasing it.

After this, the material is cut using scissors into individual canvases, taking into account how they are planned to be placed on the surface of the wall or ceiling.

Then, using a hammer drill, holes are made for the fasteners. The distance between them is proposed to be chosen from 25 to 30 centimeters. Thus, you should get about sixteen holes per “square”.

The next step is to secure the metal mesh to reinforce the plaster with screws or dowels, or self-tapping screws (in the case of finishing a plasterboard surface). Additionally, the material is secured using mounting tape. The individual pieces should overlap each other by about ten millimeters. If necessary, drill additional holes for fastening - the reinforcement should not move away from the ceiling.

Then construction beacons are placed. Apply the first layer of mortar using a trowel. It is important to thoroughly push the solution through the cells. Then distribute it evenly over the entire surface. Wait until the layer dries before moving on to the next one.

We choose metal.

Professionals recommend choosing a metal mesh for plaster in cases where surface differences are more than four centimeters. Durable metal will help hold the thick layer of mortar that will have to be applied in this situation.

Steel materials are the only option if the mixture contains cement, which contains alkali. The fact is that metal is less susceptible to alkali than plastic.

A solution with clay also requires the use of metal reinforcement. Material with cells of 50 by 50 millimeters is suitable.

Mesh for plastering facade walls can be used for different purposes. For screeds, a material with a larger cell and thicker wire is produced. For plastering, the thickness of the wire can reach one and a half millimeters, and the cells usually have a size of 30 by 30 millimeters.

One more point: roll material is used for facade work. Sectional is usually used indoors.

It's a question of price.

The cost of reinforcing mesh in Russia today is offered from thirty rubles per square meter. Specific price per sq. m depends on the type, material, manufacturer. You can buy it in many finishing materials stores.

Work on the installation of plastic mesh for plastering walls and other types, which can be ordered from specialized companies, are included in the calculation of all work on plastering walls or ceilings. Such services cost from four hundred rubles per m².

With my own hands.

You can install the reinforcement by inviting specialists, but you can do it yourself. The main thing is to follow the instructions exactly and remember important nuances.
At correct installation mesh for plastering ceilings and walls can prevent various problems from occurring in the future:

• the plaster will adhere firmly to the surface;
• there will be no swelling on the surface of the plaster layer;
• the plaster will not peel off from the wall or ceiling;
• the service life of the plaster will increase;
• quality decorative finishing will improve;

Plaster shingles.

This method of leveling the surface has long been a thing of the past. Today there are a huge number of alternatives, each of which are described above.
Shingles for plaster were applied in the old days and essentially performed the same functions as modern mesh. In old houses and buildings you can still find these structures as part of plastered walls.

The mesh is a rolled building material used to reinforce internal and external surfaces for various purposes. The maximum effect is observed in new houses that have not yet gone through the shrinkage stage, but in a number of works it cannot be done without it. The cell sizes, diameter and base are different; in each individual case it is important to choose the right option.

1. Types and description
2. Scope of use
3. Installation technology
4. average cost

Why do you need a mesh?

The material is used to strengthen the working coating, protect the applied mixture from delamination and cracking, and prevent deformation of the finish. Its installation significantly reduces the influence of mechanical, humidity and temperature influences and increases the quality of adhesion of solutions to substrates. Plastering walls on a grid (and other surfaces) is considered mandatory when:

• External facade cladding.
• Reinforcement of floor screeds.
• Finishing smooth tile building materials with low adhesion, such as polystyrene foam.
• Strengthening areas with a high risk of plaster shedding: openings, slopes, joints.
• Thick-layer application of the solution (over 2 cm).
• High risk of building shrinkage.

Types of meshes, features and applications

The base material must be strong, alkali-resistant, as light and durable as possible; steel, plastic and fiberglass have suitable characteristics. Metal products, depending on the manufacturing method and type of fabric, are divided into thin and flexible woven (with a small wire diameter), braided, welded (the most rigid, recommended for high mobility of the base) and expanded metal, obtained by cutting holes in a stretched sheet.

Depending on the rolled products used, they are all divided into types of stainless steel and galvanized and non-galvanized wire. When using them as a mesh under plaster, it is worth choosing a protected type, with a zinc coating; it better withstands the alkaline effects of cement and is less susceptible to corrosion.

Fiberglass fabric is obtained from threads of molten glass; it is impregnated with special compounds to increase strength, flexibility and resistance to moisture, alkaline and biological influences. It is the thinnest, it is recommended to choose it when finishing, applying a rough or finishing layer within 2-3 cm, arranging warm and self-leveling floors. Characteristic properties also include high thermal stability (up to 1500 °C); this plaster mesh tolerates temperature changes well. Special purpose fiberglass is determined by the size of the cells (for interior work it is recommended to buy a 2x2 m fabric, for facades and exteriors - 5x5).

The polypropylene-based variety is universal, its advantages: lightness, compactness, strength and affordable cost. The specific option depends on the size of the cells: small ones (up to 6×6) are used for reinforcement thin layer plaster(up to 20 mm), medium (13×15) is recommended to buy when reinforcing coatings up to 5 cm thick, including loaded ones, large (22×35) - when working with large surfaces and uneven facades. This group includes many subtypes and brands: Plurima (based on polypropylene with high chemical inertness), Syntoflex (ultra-strong and geometrically stable brand), STREN (recommended for use under the influence of aggressive environments), Armaflex (reinforcing any type of masonry, including uneven ones). Price square meter depends on the quality, chemical inertness and strength of the plastic and varies from 11 to 110 rubles.

Which mesh should I use and in what cases?

The main determining criterion is the thickness of the applied mortar; when working indoors, a reliable foundation and thin-layer leveling (up to 20 mm) can be abandoned. When cladding facades, reinforcement is always carried out: metal mesh reinforcement for plaster is selected when the wall level deviates by more than 30 mm, and if there is a significant risk of destruction of the base or shrinkage of the building, it must be welded. In other cases, to cover a standard masonry, fiberglass or plastic with a density in the range of 160-300 g/m2 is sufficient. Smooth foam boards that insulate the facade are recommended to be finished with light fiberglass.

It is better not to skimp on external surfaces; these areas require varieties coated with zinc or impregnated with alkali-resistant compounds. To eliminate doubts, the material is checked by immersing it in a soapy solution for several days; high-quality products do not spread or change color. When purchasing façade mesh, attention is paid to the breaking load value. On flat areas, a blade with 1800 N and above is used, on curved areas - in the range of 1300-1500.

When finishing interior spaces The same rules apply - a thick-layer coating requires reinforcement with metal, a thin-layer coating with fiberglass or polypropylene. Last type also used as masonry: an elastic fabric with 5x5 cells is placed between bricks or blocks and increases the adhesion of rows and products. Recommended density range for synthetic mesh under interior plaster is 110-160 g/m2, this is enough to ensure crack resistance and keep the layer within 2-3 cm. For sealing joints building slabs(plasterboard, fiberboard or chipboard), strengthening window openings and areas adjacent to the ceiling, reinforcing mastic roofs, serpyanka is well suited - thin fiberglass with a cell size of 2x2 mm and a density in the range of 45-60 g/m2.

The nuances of installing a mesh with your own hands

The metal variety weighs the most and requires secure fixation with screws or nails. It is degreased (galvanized steel is simply washed with water or wiped with a rag) and cut with special scissors into pieces of the required size, taking into account the obligatory overlap of 10 cm into adjacent areas. In some cases, holes for dowels are prepared in advance, the step is 25-30 cm, on average by 1 m2 requires 16 fasteners. If possible, the edges are fixed with mounting tape (when working with large-mesh options, its use is mandatory).

It is better to finish metal-reinforced surfaces in two layers (not counting the spray), the second, thinner and leveling one is applied after the first has dried slightly. This type must be reliably covered with the mixture; it is important to choose the correct cross-section and method of connecting the wire; the thickness of the coating cannot be reduced below the recommended value.

When working with fiberglass and polypropylene meshes for plaster, the mortar itself or self-tapping screws can act as fastening materials. In the first case, the canvas is placed in the middle of two layers; to increase density, it is better to unwind it directly on the spot, rather than cut it into separate pieces (the exception is the finishing of foam plastic, where segments are better suited). Plaster in the direction from the middle to the edges.

During the process, it is important to prevent the formation of air bubbles and avoid stretching of the plastic mesh.

But the more reliable and correct option is to fasten the dowels to a still dry wall, followed by spraying and applying the first layer as a base. The number of fasteners is minimal (one per canvas with a uniform step of 1-2 m), with a significant level difference they are used for installing beacons. The first layer of mortar is placed along the width of the product; after laying it, they proceed to the adjacent one, tracking the overlap of 10-15 cm with each other. Plastering for the purpose of leveling should also be done from the middle to the edge. Avoid sudden movements with a spatula, especially when working with facade mesh, otherwise they leave along with finishing composition. Correctness is checked visually - if they are visible under the leveling layer, then it is better to increase it by 1-2 mm.

Material cost

Different types of mesh

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. The market offers products from large quantity different manufacturers.

Strengthening the foundation

Plaster mesh is used for both internal and external 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. With proper 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;
• fiberglass;
• metal.

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

More detailed classification presented in the table below.

The existing assortment allows you to select high-quality products taking into account all requirements. Using a responder existing conditions the material 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;
• the type of plaster mixture 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.

Reinforced brick surface

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 to install a metal mesh: it can withstand the weight of the finish without peeling off;
• It is better to use plastic products for gypsum solutions of insignificant thickness, 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 installed using different methods. 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:

• plaster mortar;
• 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.

The painting mesh is easy enough to fix thin layer 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.

Installation of metal mesh

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– fix the material on 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. It is also necessary to use suitable installation technology. 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.

If it is necessary to strengthen the plaster to prevent cracks from appearing on it, a reinforcing plaster layer (RP) is used. For reinforcement, a special mesh is fixed inside the layer, which strengthens the solution. Today we will talk about the features of reinforcing plaster, as well as methods of its application and types of mesh.

When is reinforcement necessary?

Reinforcing plaster is used for:

1. The need to apply a large layer of solution (additional name),
2. To prevent the mixture from peeling off at the joints of dissimilar surfaces,
3. When carrying out plastering work until the building has completely settled.

The normal layer thickness is 1.5-2 cm; if the thickness of the solution is greater, then cracks may appear on it. The reinforcement prevents the appearance of defects, so the paint finish does not have to be redone.

Problems also arise when leveling walls with surfaces of dissimilar materials. If part of the wall is brick and part is gas silicate, then at their border the plaster layer may peel off or develop large cracks. Using a mesh prevents problems at minimal cost.

Reinforcement is necessary when finishing is carried out before the building has completely settled. In a good way, the walls should be plastered six months after the installation of the box is completed; if it is not possible to wait, then the use of a mesh will come to the rescue.

Types of mesh

Depending on the plaster, different types of mesh are used for reinforcement. The grid is:

1. metal,
2. Plastic (polypropylene),
3. Fiberglass.

Metal mesh is used to strengthen lime-cement plaster and is also used in masonry work. The material has cells from 1×1 to 5×5 cm.

Polypropylene and fiberglass mesh is used to reinforce gypsum and polymer mixtures, as well as to strengthen the mortar layer on the facade (thermal insulation). Let us note the polypropylene meshes U-13 and U-22, which have a cell size of 13×15 and 22×35 mm, respectively. Polypropylene is not afraid of moisture, is easy to attach and 100% copes with the function of reinforcing the plaster layer.

Fiberglass mesh has a smaller cell size and is used for complete or partial reinforcement of plaster. The material differs in density - the higher it is, the more tensile strength the mesh has. Density range – 45-160 g/m2, cells 2×2-5×5 mm. This mesh is most often used in facade work for laying on top of a heat-insulating layer.

Applying plaster

Features of reinforcement depend on the type of plaster mortar.

If it is necessary to strengthen the lime mortar, then use a metal mesh, which is fixed to the work surface before finishing. The mesh is attached mechanically (dowels, nails) after tensioning to prevent sagging. In exceptional cases, a metal mesh is pressed into the soil layer, but this is a technologically incorrect solution, since the reinforcement layer is not fixed to the surface. The further plastering process is no different from the usual one - spraying, primer and grinding.

Reinforcement of polymer and gypsum plasters (Typhoon, Rotband, etc.) is carried out inside the solution. For ordinary walls or ceilings, first apply a layer of the mixture, level it, then attach the mesh, apply another layer of mortar and grind. The reinforcement of the thermal insulation cake on the facades is somewhat different. First, the mixture is applied in strokes, a mesh is rolled out on top and the next layer is coated on top. For work, use metal spatulas (from 30 cm) and polishers.

The appearance of cracks on the reinforcing plaster is eliminated, so you can putty the walls and ceiling immediately after the solution has dried. Reinforcement increases the cost of work by 20-30%, but the costs are recouped by a longer period of operation of the plaster layer without repair.

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 products on the market from a large number of 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. With proper 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;
• the type of plaster mixture 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 the different materials from which the meshes for reinforcement are 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 gypsum mortars that are thin in thickness, and, for example, cement-sand compositions corrode such reinforcing material over time;
• 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 a good way to 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 installed using different methods. 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 the strength and reliability of the plaster finish - all this is ensured by the creation of an adhesive layer. It is formed using different materials.

To correctly reinforce 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. It is also necessary to use suitable installation technology. 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.

In building construction and production various types For finishing work, the use of metal mesh is becoming increasingly widespread. In order not to make a mistake when choosing a reinforcing metal mesh, you need to understand in advance all the pros and cons of its use. Knowing the characteristics of the types of this material will help you make the right and informed choice.

Peculiarities

Plastering building facades or interiors using decorative compositions- one of the most common and economically profitable options finishing. A wide variety of high-quality mixtures, distinguished by a variety of colors and textures, allows you to be confident in the attractiveness of the tiled surface.

The only drawback is the not very high strength of this finish. To increase its reliability and durability, special reinforcing materials are used. Their use helps prevent the appearance of cracks during inevitable shrinkage or movement of a new structure, improves the adhesive base and plaster mixtures.

Reinforcing structures are made from various materials, as a result of which they acquire specific properties that determine the scope of their application. Most often when performing plastering work the following are used:

• polymer;
• plastic;
• fiberglass;
• metal mesh.

The choice of one type or another, first of all, depends on the expected thickness of the plaster layer. You should also pay attention to finishing materials and the composition of mixtures for decorative coatings.

Reinforcing metal mesh

This material is the most universal reinforcing product. Its main functions are to strengthen and protect the plastered surface from mechanical damage. It prevents the possibility of cracking of the plaster layer due to sudden temperature changes. The rough finishing layer is more even and smooth, better prepared for finishing work.

Reinforcement with metal mesh helps to further strengthen structures that are not very strong and reliable.

In the production of this type of building materials, wire or metal rods are used. Depending on their thickness, meshes are divided into the following categories:

• lungs;
• average;
• heavy.

Advantages and disadvantages

Today the range of plaster mesh is very diverse. Constructions made of polyurethane, plastic and fiberglass have become available for use. But the most popular are those made from metals.

This is due to many features of their technical characteristics:

• The metal mesh is particularly durable, which helps it withstand heavy loads. If for alignment large area If the surface needs to be coated with a thick layer of plaster, it is better not to save money and purchase just such a material for reinforcement.
• Its use is possible when working on any base and with different compositions of rough finishing solutions.
• The application of the plaster layer is not limited by its thickness. When working with thin or light bases It is possible to apply a minimum layer of up to 20 mm. If it is necessary to equalize differences in surface heights on a vertical wall, then it is permissible to apply a solution with a thickness of more than 50 mm.

• In preparation for plastering a metal base, you can weld a reinforcing mesh to it, which will ensure greater reliability of the entire structure.
• To cut out individual pieces of a free configuration from a single piece of fabric, it is sufficient to use hand tools, for example, metal cutting scissors or wire cutters.
• Fastening such reinforcement does not require much time and effort. To create a strong connection with the base, it is enough to secure the mesh in only a few places.

The main disadvantage of this type of material is its significant weight. It can be strengthened only on surfaces that can withstand the total weight of the metal mesh and finishing leveling mixtures. You should not perform reinforcement on surfaces made of plasterboard or hollow brick.

Types of reinforcing metal mesh

Reinforcing mesh is used both for plastering and for creating cement screeds or concrete pads. In their production, metal blanks are used, the thickness of which depends on the expected load on the lined surface. They also differ in cell size. For plastering work, lighter options are used, the wire thickness of which does not exceed 1.5 mm and with a cell size of up to 30 mm.

The most popular product sizes according to GOST:

• 10x10;
• 25x25 mm.

Manufacturers offer customers rolled and sheet reinforcing mesh. Each of these types is convenient to use in its own way. When carrying out finishing work on long areas, it is better to use rolled reinforcing mesh. This will require additional effort when stretching and fastening, but will significantly improve the quality and appearance of the finished coating - it will be more even, since the work uses a single piece of canvas, characterized by the absence of seams and overlays.

For artificial stone need to be selected small sizes coverings.

The technology for attaching the mesh differs depending on the base of the surface. It is enough to weld it to the metal using a welding machine. If the mesh is quite thin, then wooden base it is conveniently fastened with an industrial stapler that shoots large staples.

To secure thicker reinforcement, you will need screws or nails. Reinforcing material can be attached to brick or concrete bases using dowels and washers.

Currently, several types are most widespread on the market:

• welded;
• woven;
• expanded metal all-metal;
• chain-link

Welded

This material is increasingly popular among buyers due to its relatively low price and very High Quality, it can also be used at any stage of construction or finishing. Most often, welded mesh is used for the following types works:

• strengthening the foundation of the building;
• reinforcement of walls made of bricks and various blocks;
• when performing finishing work on load-bearing surfaces;
• when installing a thermal insulation layer.

It is made from metal rods of different diameters by welding them. In this case, the distance between them can differ quite significantly. The weight of the mesh is small compared to other types.

Particular attention should be paid to the material from which it is made. It is optimal to use stainless metals and their alloys, since the resulting corrosion leads to premature destruction of structures.

The main disadvantage of this type of plaster fittings is the weakness of the welds - they can cause ruptures and rust. The smaller the cell size, the higher the probability of destruction, since there are more of these seams. In addition, the mesh for a long time When stored in rolls, it becomes deformed, which significantly complicates subsequent work.

Woven

This type of metal mesh is universal building material. It is a fabric made of cross-woven wires with the same cross-sectional size. It is produced on specialized looms from stainless and low-carbon steel, brass and other non-ferrous metals. Can be used in the production of painted steel threads. Cells can be of different sizes and shapes, for example, square or rectangular.

In construction great application received stainless woven mesh, made from the same material. Most often it is used as reinforcement to prevent the appearance of cracks or sifting of bulk materials when making mixtures of sand and cement.

Expanded metal mesh

In construction markets it can be found under the name “cutting” or the abbreviation TsPVS. This type of mesh is made from a solid sheet of metal, the thickness of which can reach 2 mm, but most often plates up to 1.5 mm are used. The manufacturing technology involves cutting holes and further stretching the material. As a result, cells are formed that are arranged in a checkerboard pattern. This gives the finished product special strength and flexibility. If one or more cells are deformed, the rest of the web is not subject to further destruction, but it is quite difficult to restore after storage in rolls.

This product is manufactured without the use of plastic protection, which can cause corrosion. The use of galvanized alloys significantly improves the anti-corrosion properties of the material, which is especially important in the aggressive environment of plastering compositions. At the final stages of finishing, no traces of rust appear. The shelf life also increases significantly.

Depending on the base, its weight may vary. A distinctive feature is fire resistance and the ability to use on any surface. The ability to withstand heavy loads allows it to be used when reinforcing concrete screeds.

The main tasks of the TsPVS:

• protection of the plastered ceiling and walls from mechanical damage and sudden fluctuations in air temperature;
• preventing the appearance of cracks due to technological violations during finishing work;
• significant extension of the warranty service life of the plaster.