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

For this purpose it is used special material- 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;
• low 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 reinforcement special designs, 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 meshes of different densities and with different cell sizes are visually different from each other, and the buyer can easily determine which mesh for plaster he needs 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 the 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 final, thin layer left, then you can use a canvas 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 fixing on it the entire mass of plaster or another option for the external decoration of the building’s facade, its choice must be taken seriously.

Can you imagine what will happen if you save on it and as a result all the decorative plaster cracks, which is significantly higher in price 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.

Particular attention is paid not only to the quality of interior decoration, but also to the appearance of the facade and its finishing.

With the help of high-quality façade plaster, the entire building can be made more attractive and aesthetic appearance, which will last for a long time.

In order for the plastered facade to look more presentable for as long as possible, you will need a good mesh for plastering the facade. External façade plastering mesh is used for various categories facade works and is represented by the following types:

• façade fiberglass mesh.
• metal mesh for facade.

So which mesh is best to use for facade plastering? First of all, you need to remember that not a single method of facade plastering can do without a special mesh between the finishing material and the main structure, waterproofing and/or insulation.

In this case, facade plaster mesh for exterior work ensures high-quality adhesion of the mortar to the wall, giving the mortar strength and reliability. The mesh helps to minimize the appearance of possible cracks on the plaster of the façade during the shrinkage of the building. Reinforcing mesh for facade plaster allows you to achieve the most even and durable layer of plaster, preventing the formation of cracks on the surface of the building for many years.

Place your order directly

Also, when carrying out facade work, a special mesh makes it possible to seal joints and corners, protect them from destruction when exposed to sudden temperature changes, and make them more durable.

The choice of the required mesh for facade work depends on:

• material that you plan to use for facing works Oh,
• the volume of the work itself,
• wall material and dimensions of the working surface,
• thickness of the plaster layer,
• natural and climatic conditions in which you are undertaking construction work,
• and also on the relationship between your desires and your real capabilities.

When is fiberglass mesh used for facade work:

Fiberglass or fabric mesh is most suitable for cladding small facades “with your own hands”. It is lightweight, flexible, and made from polymer materials. This mesh is also highly resistant to various aggressive alkaline solutions used in facing work. Polymer fabric mesh is very well suited for applying the thinnest layer of plaster to the façade of a building.

When metal mesh is used for facade finishing:

• For example, if the area façade walls is large enough, it is recommended to use metal with large cell sizes. Also metal grid(CPVS is better as it is lighter and more flexible, but chain-link is also possible) is used by craftsmen when plastering brick walls.
• Aerated concrete and wooden walls are finished using metal mesh for facades (preferably galvanized expanded metal).
• Galvanized mesh for facades is especially appropriate in conditions of increased exposure to adverse atmospheric factors, when corrosion resistance and resistance to aggressive components of plaster mixtures are required.
• At cement plaster A metal mesh is also used, since the alkaline environment does not destroy metal.
• If the building is located in an area of ​​active traffic, if you are plastering the walls of the basement or first floor, then the metal mesh is important to give strength to the walls under heavy loads.

The most common types of metal reinforcing mesh are currently:

• chain link,
• metal welded mesh,
• expanded metal mesh (another name for PVS - expanded metal mesh or TsPVS - seamless expanded metal mesh)

Metal mesh chain-link for facade work

Metal mesh chain-link, although it has the lowest price, is still more suitable for the manufacture of fences than for facade work - it is heavy, does not bend well, and requires considerable skill in fastening. Increasingly, lightweight, durable and flexible expanded metal plaster and reinforcing meshes are used from metal mesh.

Metal mesh PVA (CPVS) for reinforcement and plastering on facades:

Expanded metal mesh for plastering facade walls is very convenient for minimal consumption plaster mortar, thanks to the diamond-shaped cells, which allow the layer to be well retained.

This type mesh is produced by cutting out cells in a solid metal sheet. The most common use of expanded metal mesh is in plastering the facades of buildings with complex architectural forms and when finishing the corners of buildings, during the reconstruction of ancient buildings, when finishing modern facades traditional plaster.

Welded metal mesh for facade

• Welded mesh for facade plaster is most suitable for cladding work on new high-rise buildings, which are capable of deep shrinkage of the structure over time.
• It is made from small cross-section reinforcing bars, which are connected to each other by spot welding.
• Unlike expanded metal mesh, welded mesh is heavier, which adds certain difficulties in working with it.

Metal mesh facade characteristics

External plastering mesh has a number of characteristics. First of all, it must be made of durable and high-quality materials. Because only such a mesh can withstand chemical alkaline solutions used in construction and ensure long-term operation of the building and its competitiveness. appearance.

Facade plaster metal mesh for exterior work
can be represented by the following types:

• metal steel galvanized;
• metal cold-rolled steel;
• stainless;
• aluminum;

All types of steel mesh with a galvanized surface are classified as alkali-resistant façade plaster mesh, as well as mesh made of aluminum and of stainless steel.

Cold rolled steel mesh is least suitable for outdoor plastering works, namely, it is least recommended for use in facade cladding work, since, although it can withstand heavy loads, it is nevertheless not able to withstand the effects of various atmospheric precipitations and
temperatures

The use of metal mesh is rational when carrying out facade work due to the fact that, thanks to it, a high degree of adhesion is ensured and is not exposed to aggressive environments, if
there is a protective coating, you can cut pieces of various required sizes,
bend, wrap columns, arches, vaults.

Another characteristic that must be taken into account when choosing a facade plaster mesh is the cell size and mesh thickness. The shape of the metal mesh cells can be diamond-shaped or square. Cell sizes 10x10 cm, 15x15, 20x20 cm. Thickness from 0.4 to 2 mm. The higher the finishing area, the larger the mesh size used.

Installation of facade mesh

Being a manufacturer and knowing quality characteristics facade mesh, the “Setka SPB” company is ready to give a number of useful tips and recommendations for installing facade mesh before plastering external walls facade on a grid.

• First, you need to treat the walls with a Karcher and dry for at least 3 hours in good weather, treat everything with a degreasing solution greasy spots on a surface.

• A solution of starting plaster is applied to the facade so that all existing cracks and depressions on the walls of the facade are covered. It is also necessary to give this layer time to dry.

• Then a primary layer of plaster is applied, on top of which the façade plaster mesh itself will then be laid.

• After this, the plaster mesh is laid. It should be laid in such a way that it is inside the plaster layer and is completely “recessed” in it. In this case, specialists use screws and staples for better fastening.

• Another layer of mortar is laid on top of the well-laid mesh. It is important to remember that if the thickness of the plaster layer is more than 10 mm, then the mesh will most likely move towards the surface and will strengthen the surface, and not the plaster layer.

• Then apply finishing layer leveling walls using special building mixtures if necessary.

Video tutorial on facade plastering using metal facade mesh

Qualified and experienced specialists"Setka Spb" company will always advise you on all questions and help you choose wisely optimal type facade mesh, applicable specifically for your type of facade construction work, taking into account the volume, wall material, climatic features and other nuances.

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. Hardware Depending on the manufacturing method and type of fabric, they 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. The intended purpose of 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. The latter type is also used as masonry: an elastic fabric with 5x5 cells is placed between bricks or blocks and increases the adhesion of rows and products. The recommended density range for synthetic mesh for internal plaster is 110-160 g/m2, this is enough to ensure crack resistance and keep the layer within 2-3 cm. For sealing joints of building boards (plasterboard, fiberboard or chipboard), reinforcement window openings and areas adjacent to the ceiling, reinforcement of 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 will come off along with the 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

Name, basis	Special properties, brief description	Cell size, mm	Roll size, m	Price per 1 m2, rubles	Price per roll, rubles
Plaster woven mesh made of galvanized wire	Wire diameter – 0.25 mm	0.63×0.63	1×30	468	14040
		1×1		208	6240
	The same - 0.4	2x2		162,50	4880
		4x4		143	4290
	The same - 0.6	10×10	1x60	65	3900
		15×15	1x80	62	4990
Non-galvanized chain-link	Wire diameter – 1.2 mm	6x6	1x10	240	2400
Welded galvanized	Wire diameter – 1 mm	10×10	1×25	240	6000
Fiberglass mesh	Serpyanka with a density of 45 g/m2, white	2x2	1×50	18	900
	Plaster, impregnated with alkali-resistant polymer composition, 60 g/m2, white	5x5		21	1050
	For facade, 160 g/m2, blue			31	1550
Plastic mesh Station wagon S	Colors: khaki, black. Used for finishing and rough layers up to 1 cm thick	6x6	2×100	14	2800
Syntflex E	High-strength, flexible, biaxially oriented polypropylene, for reinforcing layers up to 5 cm	12x14		65	13000
C1-3, polypropylene	Gray color, for reinforcing plaster (up to 2 cm) and masonry	13×13	1×30	21	630

Facade finishing is one of the few construction processes that can not only give a more aesthetically pleasing appearance to a building, but also maximize the individuality of its occupants.

One of the most preferred materials For the production of this kind of work, from the point of view of the variety of colors and textures, facade plaster is used.

It can be made on the basis of acrylic, silicone, liquid glass or cement, with each of the bases imparting its unique properties to the finishing composition.

It is worth noting that not a single type of facade plaster is applied directly to the wall itself, between finishing and the main structure (or insulation) is always laid with a special mesh.

Why it is needed and how to choose it correctly will be discussed in our article.

The rationality of using facade mesh under plaster

Plaster finishing is one of the most ancient types of facing work, which, like any other work technology, has not been spared by technical progress.

For example, less than a century ago, printed wooden shingles were used as a layer between the plaster and the wall surface, which today has been replaced by a more practical and functional facade mesh.

Shingles - a frame made of thin wooden slats, stuffed in strict sequence. It is used to create a cellular convex base on the wall for further finishing.

The main functions performed by the façade mesh are:

• Reinforcement of the wall surface under the plaster mark;
• Additional hydro- and thermal insulation of the wall;
• Thanks to the strictly symmetrical arrangement of the threads, effective protection is achieved, preventing the formation of operational cracks and deformations in the finishing;
• The use of facade mesh allows you to create a more even layer of plaster;
• Serves additional protection from external aggressive atmospheric influences on wall structures;
• The mesh reinforcing frame serves link between the cladding and the wall, thanks to this material, the solidity of the fastening of the main structure and plaster is achieved;
• Allows you to significantly extend the life of the façade plaster finishing.

Surface reinforcement

Types of facade mesh and their technical characteristics

Now let's talk about which grid is better to use. Depending on the base material, facade reinforcing meshes for plaster finishing are divided into:

Polymer facade

It is produced on the basis of such polymeric materials as nylon, polyethylene, polyvinyl chloride (PVC), etc. It can have both diamond-shaped and square cells.

The most common options for plastic meshes (according to cell size):

Diamond-shaped:

• FCF 10 (10x10 mm);
• FCF 12 (12x12 mm);
• FCF 15 (15x15 mm);
• FCF 25 (25x25 mm);
• FCF 50 (50x50 mm).

Square:

• SQ 10 (10x10 mm);
• SQ 15 (15x15 mm);
• SQ 30 (30x30 mm);
• SQ 40 (40x40 mm);
• SQ 50 (50x50 mm).

Syntoflex mesh, with cell:

• 12x12 mm;
• 14x14 mm;
• 22x22 mm;
• 35x35 mm.

Plurima. Has a cell size of 5x6 mm.

High-strength Armaflex mesh, with cell size 12x15 mm.

Universal:

• Small 6x6 mm;
• Average 14x15 mm;
• Large 22x35 mm.

NOTE!

For facade plastering, products with square cells SQ 10 are most often used.

Advantages of using polymer plaster mesh:

• Complete resistance to corrosion processes;
• The material is lightweight, its use does not require additional reinforcement of thin walls;
• Available in roll form, which greatly simplifies its delivery to construction site, as well as the installation process itself;
• Environmentally friendly material;
• Resistant to moisture;
• Can withstand a layer of plaster 5 cm thick without deformation.

Disadvantages of using polymer meshes:

• Deformed under influence high temperatures(up to complete melting);
• Not alkali resistant material.
• Cannot be used for plaster that requires a layer thickness of more than 50mm.

Metal

Made from thin metal rods.

In production, both high-alloy steel and ordinary carbon steel can be used; products made from non-ferrous metal alloys are less common (they are unprofitable because they have a high cost).

For improvement performance characteristics metal can be coated with polymer compounds, zinc or tin paint (tinned steel).

Depending on the manufacturing method, the following types of metal mesh are distinguished:

• Expanded metal. Made from whole metal sheet by cutting out cells of the same size in it. Often used when plastering corners and buildings with complex architectural forms.
• Rabitz. It consists of many metal spirals that are woven into each other. Available with or without polymer or zinc coating.
• Welded mesh. It consists of small cross-section reinforcing bars connected to each other by spot welding.

Such meshes are divided into light ones:

1. Reinforcement diameter 3-5 mm, class BP 1;
2. Reinforcement diameter 5-6 mm, class A III;

Heavy: Diameter 8-40 mm, class A III.

For plastering walls, metal nets with a wire thickness of 3 mm and a cell diameter are used:

1. 10x10 cm (product length per roll – 2 m);
2. 15x15 cm (product length per roll – 3 m);
3. 20x20 cm (product length per roll – 3 m).

Advantages of using metal mesh:

• High degree of adhesion;
• Simply cut into the required size pieces;
• If there is a protective coating, it can resist exposure to aggressive environments;

Disadvantages of use:

• If the protective surface is missing or damaged, corrosion processes may occur on the metal;
• It conducts current very well, so it cannot be installed near electrical networks;
• It has more weight than other types of facade plaster mesh.

CAREFULLY!

When plastering facades, you cannot use mesh without a polymer or any other protective coating.

Made from fiberglass

It is made from fiberglass threads and has a cell size of 5x5 mm.

Available in rolls with different colors.

Has a density of 145-160 g per square meter.

Advantages of using fiberglass mesh:

• Does not react with aggressive chemicals;
• Resistant to temperature changes;
• Rolls are light;
• Does not burn;
• Not an electrical conductor;
• Elastic;
• Resistant to ultraviolet radiation;
• Environmentally friendly material.

Disadvantages of use: not found.

Areas of use

All of the above options for facade networks can be used not only when plastering surfaces, but also in the following cases:

• Protection of the building facade during finishing work;
• For the construction of fences, pens for small livestock;
• Sports fencing on tennis courts, ski slopes, golf courses;
• Decoration of balconies, loggias, verandas;
• Fiberglass mesh with a cell size of less than 5x5 mm is used for puttying walls;

How to choose the right mesh for plaster

To make the right choice of facade reinforcement, you need to pay attention to the conditions in which it will be used.

Thus:

• If the thickness of the plaster layer does not exceed 2 cm, then you can do without a façade network altogether;
• With a finishing layer thickness of 2-3 cm, it would be more rational to use fiberglass mesh;
• If the plaster is applied with a thickness of more than 3 cm, then the reinforcement should be done using a stronger metal mesh;

General rules:

• Weaving must be done with high quality, without defects;
• The edges of the rolls must be trimmed evenly;
• The packaging must be solid, each roll must have a label with information about the material;

Grid selection

Reinforcement technology for plaster

For metal mesh:

1. Clean the surface, remove irregularities larger than 5 mm;
2. Take measurements of the wall height;
3. Cut the piece according to the measurements required length using special metal scissors;
4. In the upper place of the planned fastening, drill holes, insert dowels, and secure the edge of the mesh using a self-tapping screw and washer;
5. Fasten the product along its entire length in the same way.

NOTE!

Metal contact with the wall can only occur at the points of fastening. The pitch of the screws depends on the size of the cell: the wider the cell, the larger the pitch.

1. The reinforcement must be wetted;
2. You can start applying a layer of plaster.

Reinforcement

Applying plaster

For polymer and fiberglass mesh:

1. Clean the surface from dirt and debris;
2. Prime the wall surface and putty it;
3. Apply glue to the wall surface as indicated on the manufacturer's packaging;
4. Take measurements of the wall from bottom to top;
5. Based on the obtained values, cut a piece of mesh of the required length from the roll;
6. Attach the product to the wall with glue applied;
7. Using a spatula, smooth the mesh onto the adhesive surface;
8. Apply putty to the surface of the mesh;
9. After drying, prime the surface again and putty with another layer.

Grid installation

Facade mesh is an integral part of facade plastering. In order for the finish to be of high quality and durable, it is worth spending a little money, time and effort to select it and attach it to the wall structure.

Useful video

Do-it-yourself façade mesh installation technology:

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. Plastered decorative mixtures surfaces 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.

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. 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;
• fiberglass;
• metal.

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

A more detailed classification is presented in the table below.

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	the fine-mesh version is a suitable mesh for plastering internal walls, and the coarse-mesh version 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 internal 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;
• 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 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:

• 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 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.

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, 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. Also required to use suitable technology installation Compliance with the listed conditions allows you to plaster walls or ceilings with high quality, minimize the possibility of cracking, and not be afraid of shrinkage of the house.

Repairs, especially in secondary housing, are impossible without leveling various surfaces, be it walls, ceilings or floors. The most suitable option for leveling work is to use plaster. This option provides not only leveling of the surface, but also heat and sound insulation in the apartment, which is often an important factor for residents. For a more reliable and durable leveling layer, it is necessary to use a special plaster mesh. It not only secures the leveling layer, but also prevents cracking and peeling of the material from the surfaces.

Peculiarities

First of all, it should be noted that plaster mesh is a universal material, the use of which is possible at all levels of construction and finishing. For example, it can serve as a basis wall panel, and can be used as an adhesive layer when leveling surfaces. The purpose and effectiveness of its use will directly depend on the material from which this or that type of mesh is made; in addition, the design features of different types can play a significant role.

Most often, plaster mesh is still used for outdoor work., it is an adhesive layer between the wall and the leveling layer of plaster. Better adhesion occurs due to the structure of the cells, which are inherent in all mesh surfaces; it is thanks to them that empty spaces are filled plaster mixture and its better adhesion to the leveled surface. And it is precisely thanks to this property that the result is an even monolithic texture.

Another feature and at the same time an advantage of this material is the ease of its installation, so leveling the surface with plaster and mesh is possible even for an inexperienced person. repair work to the master.

The solution sets securely, does not flow, and as a result forms a reliable, leveled surface.

Today, plaster mesh is used not only as adhesion when leveling surfaces, but also in other repair work. Thus, mesh is often used when installing a heated floor system. This material is a coupling for concrete screed, which covers the heated floor device. Metal mesh is often used to strengthen various types of structures, as well as in the construction of cages and pens. The mesh can also be used as a protective covering material.

The selection of its material directly depends on the thickness of the required layer of plaster. If serious leveling is not required, and the thickness of the facing layer will not exceed 3 centimeters, it is quite appropriate to use a thin fiberglass mesh. This is the cheapest option, which has the lightest weight, but at the same time perfectly protects the surface from cracking.

If the layer thickness is in the range from 3 to 5 centimeters, it is more advisable to use a metal mesh. It can not only strengthen the layer and prevent cracking, but also eliminate the possibility of peeling off the coating. If the thickness of the required layer exceeds 5 centimeters, ideally you should abandon leveling using this method, since even the strongest sealing mesh will not be able to prevent detachment of a layer of material that is too thick.

What is it for?

So that the plastered surface is as smooth as possible long term has retained its original appearance, so that unnecessary detachments, cracking and other deformations of the material do not occur, it is necessary to adhere to a special technology when facing work.

The technology consists of using a special bonding layer between the rough wall and the plaster that will be applied to the selected surface. A special layer is used as such a layer. construction mesh. It is this that is capable of creating a strong adhesion between walls and plaster, eliminating cracking and peeling.

Before special meshes from various materials, a reinforcing layer made of wooden rivers, as well as thin rods, were used for repairs; later, a reinforcing mesh made of metal began to be used. However, this material was quite heavy, its installation was labor-intensive, so soon enough a replacement for metal was created and a soft and lightweight plaster mesh made of plastic or fiberglass began to be used for finishing the facade. This option is easier to use, absolutely anyone can handle it, in addition, plastic and fiberglass are more convenient to cut and are much lighter than wire options, but in terms of adhesion and strengthening of the finish they are in no way inferior to other materials used.

The use of plaster reinforcing mesh is advisable when:

• It is necessary to create a special reinforcing frame that will not allow the facing layer to crumble or crack, which can happen during the drying process of the material.
• It is necessary to strengthen the bond between two materials that have too different compositions. For example, without using a binder layer it is impossible to hope for successful plastering of materials such as chipboard, plywood, polystyrene foam, since such materials have a texture that is too smooth to adhere to the leveling mixture.

• You can use one of the materials to process joints or seams that are formed during the installation of any materials. For example, it is very convenient to process joints between sheets of drywall or other sheet options.
• You can also resort to using mesh during the installation of the waterproofing layer and insulation. A bonding layer is also often needed between these layers and the rough wall.

• The mesh structure is also good for better adhesion of materials when installing a heated floor system; it ensures compaction of the concrete screed used in the installation.
• In addition, the use of a reinforcing layer is also advisable during the installation of self-leveling floors. Connecting and strengthening functions will also be performed here.

Without strengthening, the layer of plaster may crack or begin to peel off; this is due to the fact that the drying process of the layer, which is more than 2 centimeters thick, occurs unevenly, resulting in zonal shrinkage of the material, which can lead to cracking and other coating defects. The mesh layer ensures more uniform drying of the material due to the special honeycomb structure.

The material in the cells dries much faster and more evenly, preventing structural changes both during the repair process and after its completion.

It is also worth remembering that such strengthening is necessary not only for internal work, because external walls are exposed to much more negative impact. Temperature changes, moisture, wind and other natural factors can ruin the cladding, so for this type of finishing it is advisable to use a reinforced version, which in specialized stores is called façade or mesh for external finishing work.

Types and characteristics

So, having determined why a plaster mesh is needed, you can smoothly move on to analyzing its possible types, as well as the pros and cons of one or another option. Today the construction market offers a huge number various types: serpyanka, wire, welded, polypropylene, painting, basalt, abrasive, plastic, metal, galvanized, fiberglass, steel, polymer, nylon, installation. It’s easy to get confused and choose something completely wrong.

When choosing, first of all, you need to understand that all the presented options are divided into those that will be used for interior decoration, and those that can be used for external facades. They will differ in strength and materials of manufacture.

The most popular materials include:

• Plastic. This material is one of the most durable options. Can be used both as a layer in interior and exterior decoration. This material is better than others for strengthening and leveling brick wall. Thanks to this combination, plastic mesh can often be found under the name masonry mesh, since it is often used in the process of laying walls. It allows not only to obtain stronger adhesion of bricks, but also to reduce mortar consumption, since the layer can be thinner.

• Another popular option is a universal mesh, it can also be used for both interior decoration and exterior work. However, the universal option also includes three subgroups, the definition of which depends on the size of the cells. Define: small, here the cell size is minimal and equal to the measurement of 6x6 mm; medium - 13x15 mm, and also large - here the cell size already has dimensions of 22x35 mm. In addition, depending on the type and size of the cell, the scope of application of a particular option will be determined. Thus, small cells are the most suitable option for finishing walls and ceilings in residential premises. The middle mesh is usually made of polyurethane, which provides it with additional rigidity and strength; its scope of use is also limited internal works. But large cells can be used when cladding external surfaces.

• Most suitable for use on very textured surfaces is fiberglass mesh. This is one of the most durable and easy-to-use universal materials, which is also suitable for both external and internal finishing work. Reinforcement using of this type the lightest due to the fact that fiberglass is not a brittle material at all, which means that it is not afraid of even the most severe kinks and deformations. Thanks to this property, the material is almost the most popular option used in repair work. In addition, its cost is quite low and the payback will occur very quickly.

• Polypropylene is another popular option. Due to its lightness it is the most the best option for ceiling decoration. In addition, polypropylene is immune to various types of chemicals, which means it can be used in combination with a variety of mixtures and materials. Polypropylene mesh also comes in several varieties. The type is determined by the size of the cells.

For example, the best option for ceiling finishing is plurima - a polypropylene mesh with cells measuring 5x6 mm.

For the thickest layers, it is recommended to use a polypropylene version called armaflex. Thanks to reinforced units and cells with a size of 12x15, it is capable of withstanding maximum loads and provide strengthening to even the thickest and most textured walls.

Polypropylene syntoflex acts as a universal finishing material; it can have cell sizes of 12x14 or 22x35.

• Metal mesh does not lose popularity. The cell sizes here can range from 5 mm to 3 centimeters, but options with sizes 10x10 and 20x20 are more popular. The scope of application, however, is limited only to internal work, since the metal is extremely susceptible to external natural factors and can simply become rusty even under a layer of plaster, which can ruin the appearance of the facade, not to mention the fact that the material will lose its functionality.
• Galvanized mesh It can already be used for outdoor work, since it is not influenced by external factors.

Which one should I use?

It would seem that there is nothing difficult in choosing and installing this or that mesh; you just need to choose an option based on cost and purpose, but you should also pay attention to some nuances that can become the determining factor in choosing one or another option.

There are two main factors that will determine in choosing a suitable mesh for finishing. This is the material of the rough surface and the thickness of the plaster layer. This thickness will directly depend on the initial relief of the wall.

Depending on the wall material, the mesh material will be selected, as well as the method of its fastening. So, for cement, aerated concrete, concrete blocks and brick walls would be better suited fiberglass or plastic, secured using dowels.

On wooden surfaces, fastening occurs using galvanized self-tapping screws. Metal bases can only exist with a metal mesh, and the fastening process occurs using soldering with a welding machine.

For foam and paint, as well as for ceramic surfaces, it is better to use lightweight polypropylene, plastic or fiberglass.

Polypropylene often does not require additional fastening, it is easily attached to the wall by applying it, but it is worth considering that polypropylene cannot be used for too long uneven surfaces, the so-called extreme ones, where a too thick layer of plaster is needed.

In the process of determining the thickness of the layer required to level the wall, it is necessary to use a special tool - a building level. With its help, you need to find the lowest point and, focusing on it, determine the thickness of the future layer of plaster.

Depending on the measurements obtained, you can also choose one or another option.

So, for layers of plaster lying within 2 to 3 centimeters, it is advisable to use fiberglass, plastic or polypropylene. If the layer is more than 3 centimeters, it is recommended to use a metal mesh, having first secured it to the wall, otherwise finished design It will be too heavy and will simply fall off under its own weight. In cases where the required layer becomes more than 5 centimeters, it is better to pay attention to other methods of leveling, for example, plasterboard covering. This will significantly reduce the cost of dry mixes and significantly speed up the process.

Another significant factor when choosing a mesh will be its density. The higher the density, the better the reinforcement.

Based on density indicators, all meshes can be divided into several groups:

• 50-160 grams per 1 sq. meter. The use of such a mesh is most common in interior decoration of apartments. The differences between these options are only in the size of the cells, which in itself has a slight effect on the reinforcement performance, and therefore depends only on the choice of the buyer.

• 160-220 grams. Such meshes are an option for exterior finishing; they are not afraid of temperature changes and can withstand thicker layers of plaster; they can be used on extreme walls and other structures, for example, on a stove. The cell size here is usually 5x5 mm or 1x1 centimeter.
• 220-300 grams– reinforced mesh options. They are able to withstand maximum loads and extreme conditions.

It is worth remembering that the higher the mesh density, the higher its cost.

Installation

The nuances of installation will depend on the following factors: the material of the wall and its condition, the type of mesh, and the thickness of the plaster layer. Since fiberglass and metal are the most popular options today, it's worth looking at these examples for mounting.

The technology for fastening the metal mesh and further plastering the surface is very simple. First you need to secure the metal cuts to the rough wall. This stage is necessary because the metal has a fairly large dead weight, and with plaster applied it will increase even more, which will lead to the collapse of the structure. It is also worth remembering that in order to install the grid on external facade, you need to purchase a galvanized version that will not be afraid of extreme living conditions.

In addition to the mesh itself, installation will require dowels and special mounting tape. You need to start attaching the mesh with measurements; this will help you cut the required sections and cover the entire surface to be treated.

On next stage it is necessary to drill holes for the dowels. The distance between the holes should be about 40-50 centimeters.

In addition, it is worth maintaining a checkerboard order in placement.

Installation begins from the upper corner near the ceiling; this option is the most convenient and correct. When screwing screws into the wall and thereby securing the material, it is necessary to use special washers or mounting tape, pieces of which must be placed under the screw head. In addition to self-tapping screws, it is possible to use dowel nails that are simply driven into the wall, which significantly speeds up the process. The mesh can be secured to a wooden surface using a regular furniture stapler.

If one layer of metal mesh is not enough, you can increase the volume; in this case, the overlap between the layers should be about 10 centimeters. Once the entire surface to be treated has been covered, you can begin coating with plaster.

Fiberglass mesh can be stretched in several ways. This is a very convenient material for interior decoration and can be used by a craftsman with any experience. In addition, fiberglass is low cost and very easy to install.

The surface of enclosing structures, even with their impeccable construction, needs leveling, the classic of which is plastering. The plaster coating is often reinforced with a mesh of various materials of a certain mesh size. This additional step complicates and increases the cost of the process, but under certain circumstances it cannot be avoided.

Let's consider the role of reinforcement in a plaster coating, and which reinforcing mesh to give preference in a given case.

Functions of reinforcement in plaster

Reinforcement of the plaster layer is an effective, time-tested operation to improve the characteristics of the leveling coating.

The fittings in plaster perform the following functions:

1. Makes it possible to form a plaster coating whose thickness exceeds the maximum permissible value for the mixture used. The need for this arises when, after marking the beacon plane on the wall to be plastered, it turns out that the required thickness of the leveling layer does not fit into the characteristics of the mixture used.
2. Ensures the integrity of the plaster layer, preventing crack formation or neutralizing its consequences. The specific gravity of plaster is significant, so cracks in the coating are dangerous, especially if they form in high-lying areas that do not have support under the leveling layer (above windows and doorways) – collapse of the finish can result in injury. The reinforcing mesh will prevent its collapse even if the finish peels off.
3. Increases the load-bearing capacity of plaster. Peeling of the plaster coating in the event of loss of adhesion with the base can cause the collapse of the finish on the solid surface of the wall. This can be triggered by the load from interior elements mounted on thick-layer plaster (shelves, cornices) that are not connected to the load-bearing base. Reinforcement gives the plaster layer additional load-bearing capacity.

Plaster made from any mixture with a thickness of more than 3 cm must be reinforced to avoid delamination.

The functionality of plaster contains the answer to the question of when it is reinforced:

1. When performing thick-layer coating - locally or over the entire area;
2. If the house is located near objects that have a vibration effect on it;
3. In the presence of a factor of periodic uneven shrinkage of the building (redevelopment in apartments of frame houses);
4. To provide additional coverage bearing capacity, including for the installation of interior items and household equipment.

Types of reinforcing mesh

In the middle of the last century, plaster reinforcement was carried out by laying it on shingles, which compensated for the lack of adhesion to the base and reduced the likelihood of the coating collapsing. But installing shingles is a time-consuming operation, and the installed reinforcing lattice, while its physical characteristics were modest, was also vulnerable to moisture and microorganisms.

Today, plaster is reinforced with special meshes, which differ in the material of manufacture, production method and mesh size, on which their scope of application depends.

The main classification of reinforcing mesh is based on the material of manufacture:

• metal;
• polymer;
• fiberglass.

Let's consider these materials from the perspective of their suitability for reinforced plastering of various wall surfaces.

Metal mesh

Of all the meshes used in construction, the most durable are metal ones, which, according to the manufacturing method, come in the following types:

1. Woven - made of low-carbon, galvanized or stainless steel, brass;
2. Chain-link mesh – regular, galvanized or polymer-coated steel;
3. All-metal expanded metal mesh (TSPVS, “opening”) - made of ordinary or galvanized steel;
4. Welded - plain or painted steel.

The meshes also differ in wire thickness and mesh size.

Metal mesh plaster stone walls reinforced with significant level differences - more than 4 cm. Of the listed types, the first three are suitable for an apartment - with a wire thickness of up to 1.5 mm and a rectangular mesh with a side of 4-30 mm, but not all of them are equally effective.

The “perforation” has the best characteristics - it is made of a single sheet of metal and coated with zinc, therefore it is strong, durable and significantly increases the strength of the plaster layer with a minimum of waste during installation. But the listed advantages are also taken into account in its price - the material is more expensive than the two previous types of mesh on the list, and they also cope well with the task.

Welded mesh is made from steel rods and is used to significantly increase the strength characteristics of wall structures - in residential conditions there is rarely a need to use them.

With a significant thickness of the plaster layer, the fastening of the metal mesh to the load-bearing base must be strong (like the base itself - concrete, brick, blocks), so it is done with self-tapping screws or dowels with homemade washers large diameter, forming a gap between the reinforcement and the wall of at least 5 mm. Reinforcement of thick-layer plaster can be carried out in several layers - as the coating builds up.

But woven mesh made of galvanized wire or brass can also be used to reinforce thin-layer plaster - on top of expanded polystyrene or penoplex insulation, but this will cost more than using non-metallic reinforcement.

If large level differences on the wall are local, then there is no need to reinforce the base over the entire area, especially if ready-made cement mixture. Where the thickness of the plaster is less than 2 cm, you can do without reinforcement - cut the mesh and nail it to the wall along the perimeter of the cut.

Polymer reinforcing mesh

The raw materials for the manufacture of these meshes are granules of polyethylene, polyurethane, but most often polypropylene, which, after melting and mixing with optimizer additives, are extruded (pressed) through a cellular mold of a certain profile. Plastic mesh are produced with cells in the shape of a square, rhombus or hexagon. The process of their manufacture is low-cost, so polymer mesh fabrics are widely available at a price.

The technique of polypropylene extrusion under high or, conversely, low pressure with the addition of additives makes it possible to obtain a material of sufficient strength, uniform structure and fixed thickness. However, polypropylene mesh is inferior in strength to metal mesh. Mesh fabrics made from this polymer are most effectively used to prevent cracking of plaster - they should not be used to reinforce a plaster layer more than 2 cm thick. In addition, the alkaline components of cement-sand mixtures destroy polypropylene over time, so most meshes made from this polymer are more often used for reinforcing gypsum coatings - but also not thicker than 2 cm. Polypropylene meshes are especially convenient for laying on foam plastic, but you should remember that they are attached not on the insulation, but on a freshly applied layer of the mixture, pressing it into it with a roller, after which re-coating is performed.

Despite these disadvantages of polypropylene, the Astroplastika company (St. Petersburg) presents on the Russian market reinforcing meshes made of this material from the Italian concern Tenax, which are claimed to be chemically resistant:

1. “Plurima” is a cellular fabric made of threads strengthened using orientation technology, with knots at the corners of the cells (5x5, 5x6 or 6x6 mm), used for reinforcing thin-layer plaster and putty (5-1 mm);
2. “Armaflex” is a high-strength flat mesh fabric with a 12x15 mm cell for reinforcing plasters 1-5 cm thick;
3. “Syntoflex” - 3 modifications marked E, M and D, high-strength mesh with cells 12x14, 17x24 and 22x35 mm.

The manufacturer managed to achieve the chemical resistance of polypropylene foam by using special polymer additives.

Polyurethane meshes are available in several modifications. They can be used to reinforce almost any leveling coating, which is why polyurethane meshes are also called universal.

Fine-mesh material (5x5, 6x6 mm) is intended for reinforcing external and internal plaster coatings made from ready-mixes based on cement or gypsum with a thickness of 5 to 15 mm. Plastering with homemade DSP mortar on such a grid is not performed.

Meshes with a cell of 13x15 mm (medium mesh) are intended for reinforcing facade and interior plasters up to 3 cm thick, made from ready-made or home-made compositions based on any binder (cement, lime, gypsum).

Large-mesh polyurethane mesh (22x35 mm) is intended for reinforcing plaster coatings of medium and large thickness, including over large areas. Suitable for traditional solutions self-made and ready-made leveling mixtures.

To reinforce internal plaster, a polymer mesh with a cell size of 5x5 mm must have a density of at least 110 g/m2.

Fiberglass mesh for plaster reinforcement

Fiberglass filaments are produced by passing molten glass through micro-holes. Based on the place of application, meshes made from this fiber are divided into façade and interior. Both types have a cell size of 5x5 mm, but the threads of mesh for outdoor use have a higher density (160 g/m2), which determines their high tensile strength, and are impregnated with a special composition that increases frost resistance.

With wide availability at a price, high flexibility and equal specific gravity, fiberglass mesh has the following advantages over polymer canvases:

1. Absolute chemical inertness;
2. Higher tensile strength;
3. Virtually unlimited operating temperature range (melting point 1500°C).

When choosing fiberglass mesh for plaster, you should be guided by its specific gravity. The facade is reinforced with material with a density of 90 g/m2, internal surfaces– from 60 g/m2.

There is commercially available fiberglass mesh with a cell size of 10x10 mm and a density of 450 g/m2, which is used for reinforcing thick-layer plaster coatings over large areas, but in apartment conditions the outstanding characteristics of such a material will remain unclaimed.

Conclusion

Choosing a mesh for reinforcing plaster is not difficult. You just need to know the place of application, the maximum thickness of the future plaster coating and the leveling material.

As for the prices for reinforcing material, in Moscow and the Moscow region they are approximately the same.

The mesh for plastering interior walls allows you to finish the premises more efficiently. This technology prevents the solution from peeling off the surface, makes the coating harder and doubles its service life.

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

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

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

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

What type of mesh is used for plastering interior walls?

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

• Woven mesh is a flexible and incredibly durable material. Its structure consists of woven wire of different sections. Ideal for DIY wall decoration. Has square cells 1x1 cm with zinc coating. Sold in rolls in construction stores.
• Chain-link or woven mesh is suitable for strengthening multi-layer plaster. Cell size 2 cm.
• Welded mesh with square cells is made by spot welding intersecting wires located perpendicular to each other. Low-carbon, polymer-coated or galvanized steel wire is used for production. Designed to prevent cracking of the finishing layer during the period of active settlement of the walls. To prevent cracks in the plaster, a mesh with 2/3 cm cells is used. It is sold in rolls 1 meter wide.
• Expanded metal mesh is produced by pressing from sheet metal. First, holes are cut, and then the sheet is stretched to obtain diamond-shaped cells arranged in a checkerboard pattern. Apply under a small layer of solution. Rolls can be of different lengths, but the standard width is 1 meter.

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

Preparation and start of finishing work

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

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

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

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

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

Plaster facing

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

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

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

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

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

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

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