Mesh for plastering walls indoors. How and which one to choose mesh for plastering walls: types, cost, selection criteria

The mesh for plaster is the key to the durability of the work performed. Plastering walls – traditional technology leveling and finishing. And not only - plaster is also performed for the purposes of fire protection and sound insulation, during repairs, as a decorative finishing layer or as preparation for finishing... but most often gypsum, cement-sand and lime plaster is needed, just as finishing. The use of mesh for plaster is an important condition.

Reinforcement of products made from cement-sand mortars is a condition for their long service life, and the plaster layer is no exception. In order for the plaster layer to be durable and serve for a long time, it is reinforced by placing inside a mesh made of plastic, fiberglass, steel; there are a lot of types and materials of mesh. And you need to choose a grid based on certain conditions.

Application of plaster mesh

Although the technology is simple - you need to place a mesh approximately in the middle of the solution layer, there are some nuances. Two factors are important - the thickness of the plaster layer and the material of the surface on which it is applied. The most difficult cases are a thick layer of plaster - more than two centimeters, and a finishing surface that does not have good adhesion to cement - sand solutions, that is, metals, wood, some types of panels. If one or both of these factors are present, then it is important not only to ensure adhesion of the plaster to the wall, the reinforcing mesh must also be firmly fixed. It is not enough to simply lay it in the plaster layer - the result of such work can be a durable layer of plaster that comes off the wall in a single layer.

Fasteners for plaster mesh

The types of fastenings for mesh also depend on the material of the walls - to concrete and brick, although they have good adhesion, the mesh is fastened with dowels, using large washers, to wooden walls- sometimes with nails, but it is better to fasten with self-tapping screws. If you need to plaster metal surface– choose one of the types of steel mesh, and then fix it by welding. The thicker the layer of applied solution is required, the more powerful the mesh is needed; sometimes Chainlink is used. It is clear that thin woven metal mesh is not suitable in this case.

Inexpensive and widespread meshes made of fiberglass and polypropylene are used for plasters that are not extreme. The thickness of the applied layer is 15-20 mm plus the surface material, which is combined with plaster solutions - and you can perform work without fasteners.

Preparing the surface for plaster

Preparing the surface for plaster is very important. It doesn’t matter whether the layer is reinforced or not - cleaning, dust removal, removal of all old peeling finishes, as well as treatment with penetrating primers or primers is a prerequisite. A properly prepared surface with good adhesion, a smooth wall that does not require a thick layer for leveling - if all these conditions are met, then a thin, strong and elastic mesh should simply be correctly placed in the body of the plaster layer. First, a layer of about 5 mm of mortar is applied to the wall, then the mesh is pressed into it with a wide spatula. The fine-mesh mesh holds up well in the solution. Then this first layer should dry and set. And last, finishing layer, made with the same plaster composition - completely levels the surface.

Brief overview of plaster mesh

There are a lot of plaster meshes, and new ones are appearing, from a variety of materials. Gone are the days when there was only one way to strengthen plaster on the wall and ceiling - wooden shingles. It also happened that they hammered nails and pulled wire over them. But modern expanded metal and woven steel mesh, with or without galvanization, is undoubtedly much stronger and more technologically advanced.

Plastic plaster mesh

They are used not only for plaster, but also for brick and block masonry for the same purpose - reinforcement. The strength of the mesh provides reinforcement to the masonry - the mesh has high tensile strength. Material – polymers, cell size is usually 5*5 mm, release form – rolls. Technological, light in weight, and easy to cut, but at the same time very durable. Suitable for plaster layers with a small thickness - up to 20 mm.

Polyurethane plastering mesh with fine mesh

Universal, suitable for both walls and ceilings, for reinforcing thin layers of mortars of any composition. Cell up to 6*6 mm. Meshes with a cell size of up to 15*15 mm are considered medium.

Large polyurethane plaster mesh

Used for mechanized finishing of large areas - warehouses, hangars, facades of public and industrial buildings, etc. mesh 20*20mm, 30*30 mm, 35*35 mm, mesh is produced in rolls.

Fiberglass plaster mesh

In terms of strength it has best characteristics, how plastic mesh, withstands significant breaking forces. Another advantage that many types of plastics do not have is that glass fiber is completely chemically inert, and the temperature range of its use is practically unlimited.

Classification of fiberglass plaster mesh

Fiberglass mesh is divided into groups according to density - the higher the density in g/cm2, the stronger the reinforced layer.

For interior plaster Painting and plastering fiberglass mesh is used. The name painting speaks for itself - this type of mesh is the lightest and thinnest, with a density of approximately 45-55 g/cm2. The cell is small - 2*2 mm, 3*3 mm. Plaster mesh for interior decoration have a higher density - up to 180 g/cm2 and a cell from 4 * 4 mm, 5 * 5 mm.

Fiberglass mesh for exterior finishing and facades. Density from 180 to 220 g/cm2, cells 5*5 mm – 10*10 mm.

Fiberglass mesh for plastering on plinth

In addition to the base itself, they are also used for the part covered with soil. And also for plastering underground structures and elements. Very strong and dense mesh, for extreme conditions work and heavy loads, belong to anti-vandal building materials. The price is much higher than for thin meshes. Density up to 300 g/m2, and this is not the limit. The mesh markings indicate the density and tensile strength, as well as the purpose of the mesh.

A feature of fiberglass is its poor resistance to alkaline environments. Basic construction finishing solutions namely alkaline ones - they are classified as weak and medium alkali. Therefore, all fiberglass meshes undergo special treatment - impregnation with polyacrylic dispersions. The result is protection for long term. Unprotected fiberglass cement mortar capable of dissolving and “eating” over a period of approximately several months to several years.

Fiberglass mesh is produced both in rolls and in strips with different widths. It is possible to buy them in canvas usually meter width, and even with ready-made fasteners from corners - for reinforcing horizontal and vertical angles. Tapes are used for finishing gypsum board and gypsum fiber board cladding, and for other surfaces made of panels, sheets or blocks, including foam plastics and expanded polystyrene.

Fiberglass mesh is used not only for plastering surfaces and strengthening joints between walls and blocks of windows, doors, ventilation ducts etc. In structural “pies” with heat and waterproofing, as well as for strengthening concrete screeds and self-leveling floors, these meshes have proven to be excellent and are very popular.

Steel mesh for plaster

Many types of metal wire mesh are produced. The cell sizes vary, usually up to 50 mm. Steel mesh is intended not only for reinforcing the plaster layer, but also for strengthening walls. Steel mesh is used very widely - both indoors and outdoors, for reinforcing and decorating surfaces made of reinforced concrete and lightweight concrete, brick and stone.

Metal woven plaster mesh

It is made by weaving from wire, like fabric from threads - twill and linen. The cells are small, from 2*2 mm to 15*15 mm, produced in rolls of a meter or 1.5 meter width. The wire used is galvanized and stainless, less often black.

In terms of strength, woven metal mesh is divided into light, medium and heavy, depending on the thickness of the wire used. The main diameters of the wires are from 0.32 mm to 0.8 mm, less often 1 and 1.2 mm.

Rabitz

They also produce galvanized and colored polymer coatings. They are used not only in the construction of fences, partitions or screens. To strengthen adobe and clay walls under plaster, elastic chain-link with high relief is irreplaceable. The cells hold large volumes of plaster, creating a monolith of reinforcing and finishing layers, and the Chainlink itself is easily attached to the wall surface.

Welded metal mesh for plaster

They are produced black, galvanized and with polymer coatings. Used not only for masonry, concrete screeds and foundations, as well as for strengthening structures with a thick layer of thermal insulation and for finishing surfaces under load.

Can be used for walls made of stone, brick and concrete, as well as for wooden surfaces, with a thick layer of plaster, uneven walls and for loaded surfaces. Welded mesh has a huge range of applications, cells from 5*5 to 100*100 mm, other sizes are possible, wire thickness is usually up to 3 mm. Output – depends on the thickness of the steel, rolls or sheets.

Mesh with galvanization and heat treatment

For plaster it is also produced special type plaster mesh– galvanized and heat treated. The grids are designed to distribute and retain solutions on vertical surfaces without loss. Cells from 10 mm to 100 mm, many standard sizes of meshes with rectangular cells. Output – rolls and sheets, depending on wire diameters.

Expanded-exhaust plaster mesh

They are produced both wicker and from solid metal sheets with a thickness of 0.5 -1.0 mm by drawing and perforating the sheet. They are widely used, including under plaster, along with welded mesh and chain-link mesh. They perform the tasks of holding and adhesion of finishing layers, strengthening them and significantly increasing the resistance to cracking during shrinkage of buildings.

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. 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.

View	Cell size, mm	Characteristic
masonry (painting)	5*5	plastic sheet used when working outside and inside buildings using gypsum mixtures
universal: small, medium, large	6*6, 14*15, 22*35	fine mesh version - suitable mesh for plastering interior walls, and coarse-mesh can withstand temperature changes and external loads well
fiberglass mesh	5*5	durable, resistant to moisture, cold and heat, chemical compounds
Plurima	5*6	made from polypropylene, chemically inert, used for external and interior work

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 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 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;
• during the plastering works for finishing the external walls of a house, 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:

• cleared of lubricant composition, 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.

Minimum height created coverage depends on the thickness of the mesh wire. Metal products additionally strengthens the base, and fiberglass reinforces 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.

Hello Dear friends! Today we will look at a very important component of facade finishing - a mesh for plastering walls. When insulating a house thermal insulation material with subsequent plastering one cannot do without the reinforcement process.

For this, a special material is used - reinforcing mesh for plastering walls.

What is its purpose, is it possible to do without a construction mesh for plaster when performing the “ wet facade“What types are offered today in the building materials markets and how to make a choice? We'll tell you below.

Properties:

• moisture resistance, resistance to temperature changes;
• low elongation and deformation rates;
• high tensile strength;
• short specific gravity, does not weigh down the structure;
• resistance to aggressive environments.

All these properties help to significantly improve the quality of thermal insulation, as well as significantly extend the service life of the thermal insulation and decorative layer. But all this cannot be done without first reinforcing the wall.

Fiberglass mesh - made of fiberglass, it is often used as a reinforcing mesh for plastering walls. Depending on the purpose they are classified into:

• conventional, used for the base layer of plaster;
• reinforced, used for reinforcing special structures, for example, when insulating the foundation, ground floors etc.;
• architectural, used for special architectural elements.

Metal mesh for plaster or galvanized mesh - this mesh has a long service life and can be used in finishing any facades. For example, metal mesh for plaster can be used when finishing a façade with tiles (they are heavy and require a strong reinforcing layer) or a plinth when finishing with stone.

And also when choosing a facade mesh for plaster, be sure to take into account its density. Since strength and other important physical characteristics depend on its density:

• up to 90g/m2 – for interior decoration and painting work;

• from 90 to 220 g/m2 - to strengthen the plaster of facades, we recommend using this mesh in thermal insulation work;

• more than 220g/m2 – to strengthen building elements subject to maximum load or located in the ground.

What does the color say?

Today at construction stores you can find fiberglass mesh for reinforcement different colors. There are five basic colors: white, blue, green, orange, yellow.

Why do they come in different colors? Manufacturers do this so that visually meshes of different densities and with various sizes The cells differed from each other, and the buyer could easily determine which mesh for plaster he needed and which mesh to choose.

For example, from one well-known manufacturer, orange fiberglass mesh has a density of 150 g/m2 and a cell size of 5x5 mm, white - 45 g/m2 and 2x2 mm, respectively. Today, when choosing, I would not focus only on color of this product. Below we will describe the stages of selection; after reading this, you will be more prepared and will easily cope with the task of selection.

Choosing a façade mesh

When choosing a material for reinforcement when installing thermal insulation, you should pay attention to the following indicators:

1. Density, it should be from 145 to 160 g/m2, optimal size 5x5 mm.
2. Weaving quality and strength. To do this, just take a small piece and crumple it up. A good mesh should not tear, deform and quickly return to its original shape.
3. Resistance to aggressive environments. The material must be treated with special alkali-resistant compounds.
4. Price. Cost of reinforcing material according to general rule should not exceed more than 5% of the total cost of insulation.
5. Safety. Do not hesitate to ask the seller for a hygiene certificate.

Fiberglass mesh for facades is available in rolls of various lengths (usually 20 meters or 50 meters). The roll must be smooth and dense, and it must have a label indicating the manufacturer and characteristics of the material.

How to choose the right mesh?

Experienced builders have their own rules for choosing a grid, and we will tell you about them. It is imperative to check it for tensile strength. Take a piece of mesh in your hand and squeeze it; if it is of high quality, then it should return to its original shape - straighten.

First, you need to decide why you need it, what you will do: plaster, lay tiles, what is the thickness of the planned plaster, etc. Let's look at the choice using an example:

1. If the layer of our plaster (finish) does not exceed 5 mm, then it is recommended to use fiberglass mesh for reinforcement. I almost forgot to say that the reinforced mesh for plaster evens out the wall we are working on a little more. It is clear that it cannot even out large differences, but it smooths out very well.
2. Now let's consider the case when the plaster layer is more than 5 mm, then it is necessary to use a galvanized metal mesh, it will make the layer very strong. But be careful, we are talking about galvanized mesh, not steel mesh. Under no circumstances should steel be used for finishing facades, as it oxidizes (rusts) and can ruin everything for you.
3. If you are already finishing the finishing and you have a finishing one left, thin layer, then you can use a fabric with very small cells.
4. If work is being done on a plasterboard surface, then a plastic grid will do.

Conclusion

Since the main purpose of the plaster mesh is to create a powerful reinforcing base for further fixation of the entire mass of plaster or another option on it exterior finishing façade of the building, its choice must be taken seriously.

Can you imagine what will happen if you skimp on it and as a result everything cracks? decorative plaster, which is significantly more expensive than even the most expensive façade mesh. Or it will start to fall off decorative tiles, which is also not cheap. There is only one conclusion - there is no need to save on facade mesh.

In order to level a wall with a plaster mixture, you need preliminary preparation, which consists of surface treatment and installation of beacons. In this case, metal or polyurethane mesh is often used. This material gives surfaces high strength.

Application area

Metal mesh for plaster is quite in demand in the modern construction market for reinforcing surfaces. Long before that For these purposes they used shingles, but now metal mesh has completely replaced this material.

Using a grid allows you to:

• reduce the size of cracks on the surface;
• increase service life;
• improve the quality of decorative finishing.

The scope of application of the mesh for plaster depends on its type.

The plaster will adhere well if the walls or ceilings are first thoroughly cleaned and coated with a primer. The use of metal mesh can only reduce the number and size of cracks, making them almost invisible.

For more information about the areas of application of the most common meshes, see the table:

	Plaster	Brickwork	Floor screed	Tile laying	Fencing	Housings, frames, cages	Warm floor
Expanded metal	++			+	+
Welded	+			+	++	+	+
Masonry		+	+

In order to choose a metal mesh suitable for the job, you should familiarize yourself in more detail with the types of reinforced mesh for plaster.

Species and types

Metal mesh is mainly sold in rolls. It can be attached to surfaces using glue, screws, screws and similar materials.

Plaster mesh can be of the following types:

• masonry;
• station wagon (small);
• station wagon (medium);
• station wagon (large);
• fiberglass mesh;
• Plurima;
• armaflex;
• syntoflex;
• steel;
• galvanized.

Masonry

They are made from polymers and are usually used for brickwork. The cell dimensions are 5x5 mm.

Station wagon (small)

They are made of polyurethane and are used to prepare for plastering all types of surfaces. Cell dimensions are 6x6 mm.

Station wagon (medium)

Similar to station wagon (small), but cell dimensions are 13x15 mm.

Station wagon (large)

Also made of polyurethane, they can be used for preparing surfaces in large rooms, such as warehouses and workshops. The cell dimensions are 22x35 mm.

Fiberglass mesh

Made from fiberglass. This kind of mesh is resistant to temperature and chemical influences. They are distinguished by a high degree of strength and can withstand even heavy loads. This material Popular for leveling any surface. R cell dimensions 5x5mm.

Plurima

This type of mesh is made of polypropylene. Light in weight, it is convenient for reinforcement both indoors and outdoors. Cell dimensions are 5x6 mm.

Armaflex

Made from polypropylene. Ultra-strong, it is ideal for reinforcing areas of high load on plaster layers. The cell dimensions are 12x15 mm.

Syntoflex

Polypropylene mesh. It is lightweight and resistant to chemical influences. The range of applications of this kind of materials is quite wide. Well suited for leveling work indoors and outdoors. Cell sizes can be 12x14 and 22x35 mm.

It should be remembered that a layer of plaster will not protect the metal mesh from moisture.

Steel

They consist of steel rods in which the nodes are fixed by soldering. They apply only to internal finishing works, because as a result atmospheric precipitation steel suffers from corrosion.

Galvanized

They consist of galvanized rods fixed in nodes. Cell sizes are different. Distinctive property is durability and strength. Used for indoor and outdoor work.

According to the type of design, metal plaster mesh can be:

• masonry;
• chain link;
• welded

The most commonly used mesh is chain-link mesh, which is distinguished by its versatility.

To summarize, we can say that metal plaster mesh may differ in the following parameters:

• by cell size;
• by type of coating (black or galvanized);
• by wire diameter;
• density.

But, according to world standards, the main parameter is surface density. This is the main thing you should pay attention to when choosing a mesh for indoor and outdoor work.

For indoor work, use reinforcing mesh for plastering walls with a density of 110 to 160 g/m2(if the cell size is 5x5 mm). Facade mesh for plaster must have a density of 160 g/m2, because the surface of the room is exposed to precipitation and temperature changes. When facade reinforcement, it should be taken into account that depending on the floor, the mesh density should also differ.

To choose best option, it is better to consult the seller.

The main range of metal mesh produced for plaster can be seen in the table:

Working with the grid

The stages of working with metal mesh are as follows:

• cutting;
• installation;
• applying plaster.

It is best to cut the mesh with a grinder, although thin ones can also be cut with wire cutters

cutting

Before you start working with the mesh, you need to measure the dimensions of the surface using a tape measure. After rolling out the roll, use metal scissors to cut a piece of the required size. Can be cut lengthwise or crosswise. It depends on how the grid will be positioned. You can cut the mesh with a special machine, intended for these purposes, but the principle of operation is the same.

Installation and application of plaster

First, to improve the adhesion of the plaster mixture, you should prepare the surface by cleaning it from various kinds pollution.

The procedure for installing the mesh under the plaster is as follows:

• using a hammer drill make 6mm holes every 25-30 cm. The depth of the hole depends on the length of the dowel. For convenience, it is recommended to make holes 2-3mm deep longer dowels;
• insert dowels into holes;
• apply a small layer of plaster across the entire width of the mesh;
• attach the mesh to the freshly plastered surface and fix the mesh with mortar, which hardens quickly;
• slightly press the mesh trowel;
• neighboring the piece is overlapped by 10 mm;
• Press down the ends of the mesh with a spatula to the surface. If the ends of the mesh lag behind the surface in some places, it is necessary to secure them additionally;
• after the first layer has hardened, apply another layer 2-3 mm thick with a trowel or spatula;

• evenly level the surface;
• to the grid attach beacons.

Reinforced mesh can be fixed different ways. Sealing solution is most often used in small areas. The solution is applied pointwise and in small quantities; subsequently, the plaster layer is evenly distributed over the entire surface. But you can fix the mesh on the surface not only with a solution, but also with the help of devices designed for this: screws, self-tapping screws, special glue.

It should be noted that the thickness of the plaster layer directly depends on the thickness of the mesh. For example, with a mesh thickness of 0.5 to 1 cm, the thickness of the plaster layer should be about 5 mm.

The plaster layer from 2 to 5 cm can not be reinforced at all. But, as practice shows, this is not always advisable. With such a layer thickness, the plaster can shrink and the foundation can settle, resulting in cracks forming on the surface of the wall.

Reinforced mesh gives the wall elasticity and mechanical strength b. If you plan to apply a plaster layer with a thickness of 30 mm or more, the use of reinforcing mesh is mandatory. In this case, it is better to do this in two stages. It must be remembered that the second layer is applied after the first has dried.

Vacation forms in stores, comparative costs

The price of mesh for plaster depends on the size of the cells, type and manufacturer. It is packaged in rolls and measured in linear meters. So, The length of the welded mesh ranges from 1 to 120 linear meters. The most common chain-link mesh has dimensions: height - from 1 to 3 m, length - 10-30 linear meters.

Average, plaster metal mesh 5x5 will cost 800 rubles, galvanized mesh is more expensive. On average, the price of galvanized plastering mesh (20x20 or 10x10) will be from 1500 to 1950 rubles. Welded mesh is the cheapest. Its cost for linear meter is 80 rub.

More information about metal mesh for plaster can be seen in the video:

Plaster on mesh – effective method rough wall finishing. A particular advantage of this method is that it allows you to apply a thick layer of mortar, which during the finishing process will not slide or peel off under its own weight. What is the procedure itself, what types of mesh should be used in certain cases, and how to attach them? More on this later.

When plastering walls without using a reinforcing layer, there is a high risk that the applied solution will simply fall off the base. And when finishing brick and wooden surfaces, the plaster may begin to peel off and crumble even after repairs have been completed. This usually occurs due to insufficient adhesion of the materials indicated above. The mesh allows you to form monolithic slab, which is not afraid of any loads. Different meshes are designed for a specific load, and the type of material used depends on the thickness of the plaster layer.

On a note! With the help of reinforcement, a durable coating is created that will not crack during long-term use. Even if the solution preparation technology is violated, the mesh will ensure the integrity of the plaster layer.

Types of grids

There are several types of products used for reinforcement, the main ones being the following materials:

• fiberglass;
• metal.

Types of reinforcing mesh: a – metal; b – fiberglass

When applying a thin layer of solution to flat surface Fiberglass sheeting is usually used. For finishing curved walls, when the thickness of the plaster is more than 2 centimeters, only a metal product is suitable.

In turn, metal mesh also comes in several types:

• woven - durable and flexible material, which is made from wire of small cross-section. This product is used for both external and internal work. When choosing a woven fabric for reinforcement, it should be taken into account that the optimal cell size in this case is 1x1 cm;
• wicker - also known as chain-link mesh. Best suited for finishing large surfaces. The most common cell size is 2x2 cm;
• welded - made from wire using spot welding. The rods located perpendicular to each other form square cells, the optimal size of which for reinforcement is 2-3 cm. Welded products are most often used for finishing buildings subject to severe shrinkage;
• expanded metal– made from sheet metal by forming diamond-shaped cells on a special machine. Such material is usually installed in cases where a small solution consumption is expected per 1 m2.

How to attach metal mesh?

To work with a metal mesh you will need self-tapping screws, construction dowels and metal mounting tape.

1. Before installing the canvas, it is necessary to cut off the required piece, having previously measured the area on which the plaster will be applied in the future. For cutting thin material Metal scissors will be enough. If the product is made of wire with a diameter of 2 mm or more, you will need a grinder. The cut fabric must be degreased by wiping it with a rag moistened with a solvent.
2. Attaching the mesh under the plaster should begin from the ceiling. The top of the material is secured along the entire length with self-tapping screws, under the heads of which cut fragments are placed mounting tape. Wide washers can also be used as spacers, but they are much more expensive than tape.
3. When installing on a concrete or brick surface, you need to drill holes in the wall and insert plastic dowels into them.
4. The distance between the screws depends on the size of the cells and the thickness of the mesh itself. But in any case, it is desirable that the fastening step be no more than 40-50 cm. In places of fixation, the canvas may come into contact with the wall, and in the spaces between fasteners it should not contact the surface, since in this case the quality of the plaster layer will deteriorate.
5. At the joints, the material is installed with an overlap of 8-10 cm.
6. A properly secured fabric should be well tensioned. If the material does not vibrate in places where there are no fasteners, then everything is in order. Otherwise, voids may form under the mesh, which will negatively affect the quality of the finish.

Installation of fiberglass sheeting

In this case, the plaster mesh is attached to the wall by fixing the material only along the perimeter of the canvas. First, using self-tapping screws, secure the upper edge of the mesh in several places, and then all other sides. Additional fasteners are usually not used, since later, when applying the solution, the mesh is securely fixed in the thickness of the plaster.

It is possible to fix the fiberglass mesh on the wall with just a plaster solution; if difficulties arise, you can use self-tapping screws

Since the mesh is initially rolled into rolls, for ease of installation it is better to unwind and fasten the material along the walls, parallel to the floor. You need to start fastening from the top, from any corner of the room. The joints are overlapped with an overlap of 15-20 cm.

You should know! It is best to cut the material so that you can stretch the whole fabric. This will ensure higher strength of the plaster layer.

Preparing the wall for plaster and installing beacons

Even when using a mesh, the surface requires preliminary preparation:

• First of all, the wall is freed from old decoration(if any) – paints, plasters, etc.
• Next, dust is removed from the surface. If there is fungus and mold on the wall, the affected areas should be cleaned with a wire brush.
• After this, the surface is treated with a primer, which improves the quality of adhesion, strengthens the base and prevents the formation of mold and corrosion.

After preparing the base and installing the reinforcing sheet, it is necessary to help form a smooth surface during the plastering process. A special profile is used as beacons.

Installation is as follows:

1. Using building level, set the outer profile in a strictly vertical position and secure it with two self-tapping screws.
2. Next, the lighthouse is fixed using gypsum mortar.
3. The next step is to install a beacon on the other edge of the wall. To mount all profiles in the same plane, a thread is pulled between the outer guides.
4. Then the remaining beacons are installed, the distance between which should be less than the length of the rule.

Plastering the surface

After installing the beacons, you can proceed to the plastering process. Plastering walls on a grid is carried out in several stages, at each of which one layer of mortar is applied.

First stage. Plastering is usually carried out in 2 or 3 layers, depending on the material of the walls. The initial layer is applied by “spraying”. To do this, prepare a solution whose consistency should resemble sour cream. Ready mixture throw on with a trowel or ladle in any order. The solution can be spread, but the first option is easier and faster. The applied mixture is leveled with a spatula. The thickness of the “spray” layer should be about 10 mm.

Second phase. After the first layer has completely dried, a thicker mixture of dough-like consistency is kneaded. The solution applied using a trowel is leveled with a rule, which is pressed against the beacons and pulled from the bottom up. This layer should completely cover the reinforcing mesh. After the solution has set, the profiles are pulled out and the remaining furrows are sealed.

Third stage. Final procedure - final alignment frozen surface. To do this, prepare a liquid solution and, applying it to the wall, rub it in a circular motion using a grater.

The above plastering technology is suitable for finishing any surface, regardless of what kind of reinforcing mesh is used.