What mesh for plaster walls. What is reinforcing mesh and when is it needed? Types of grids, features and applications

Reinforcing mesh for plastering walls is a modern version of strengthening the plaster layer. Its use allows you to form a very strong durable layer of material. Then cracks will not form, the surface will look perfectly smooth and of high quality.

Today the market offers a choice of two options - a grid for plaster
metal and polyurethane mesh. Each has its own characteristics and its own scope. And, in turn, it is divided into several types:

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

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

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

Universal large with cells, the side of which is 22 and 35 millimeters; it is convenient to use it when decorating spacious premises, for example, warehouses or production workshops; it is a suitable mesh for facade wall plastering; it tolerates loads, temperature changes well.

fiberglass mesh, which is made of fiberglass, pre-treated with a special method; the size of its cells is five by five millimeters; such a material is well tolerated by the action of low and high temperatures, the effects of precipitation, and is also not affected by chemicals, which makes it the best option when using cement mixtures; has very high strength characteristics, can "work" anywhere; This is a good mesh facade for plaster.

Plurima, which is a biaxially oriented structure; its material is polypropylene; cell sides - five by six millimeters; does not react to the action of chemical compounds; very light; it is applied in work in and outside of rooms.

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

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

Steel mesh- these are rods connected by soldering at the intersections; many cell options; suitable for high loads, when it is necessary to form a layer of large thickness.

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

Mesh attachment.

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

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

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

When applying a spray, it is convenient to first attach it to the wall, and then fill it with a plaster mixture. At the same time, it is worth carefully monitoring that the solution adheres well to the surface being trimmed.

It is believed that the best way is when the reinforced plaster mesh is pre-attached to a dry wall using screws, self-tapping screws and other devices. And then the mixture is already applied - in a uniform layer over the entire surface to be trimmed.

When is mesh used for plaster walls?

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

First, understand how thick it is supposed to make a layer of mortar on a specific wall or ceiling surface. This is important, since this factor determines how thick the building mesh will be. To do this, make such measurements: find the most protruding point on the wall or ceiling. Apply one of the levels - laser or building. Then they look for the "lowest" place. Determine the thickness of the plaster layer to be applied.
When the solution layer is not more than twenty millimeters, and there are no rusts or significant protrusions on the ceiling or wall, reinforcement can be omitted - the mixture can hold on its own.
With a layer thickness of twenty to thirty millimeters, reinforcement will be needed. Without it, the coating may peel off over time, cracks may appear. Suitable polymer mesh or fiberglass. It will not allow cracks to form on the finished surface of the dried mixture.
A layer of more than thirty millimeters requires the use of metal material. This will help to avoid peeling of the plaster under its own weight.
If measurements have shown that in order to level the surface, it is necessary to apply a solution with a layer of fifty millimeters or more, it is better to choose a different material: instead of plaster, use, for example, drywall or stretch ceilings, or other materials. They will hide significant depressions, protrusions.
Do I need a mesh when plastering aerated concrete? In order for the mixture to be well fixed on the foam blocks, it is better to use it.

Installation work.

The installation process is divided into several steps.

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

Then the chain-link mesh for wall plastering is cut into canvases, so that it is more convenient to work with it. It is worth considering that along the joints of walls or rustication on the ceiling, reinforcement should be placed in the form of solid canvases. At the same time, it is good when the edge finds itself on an adjacent wall or a wall bend of ten to fifteen millimeters. This strengthens the corners. It is very important to make a right angle with plaster.

For each type of building grid for plaster, its own technology is used. For example, fiberglass material is attached to the first layer. It is pressed a little, then the next layer is applied. The fiberglass mesh for plaster is inside the plaster layer.

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

Then holes are drilled at the selected points, where dowels or screws are placed. So that their hats protrude slightly above the wall or ceiling. Spread the first layer of plaster mixture. They put nets on the hats. Cover with plaster.

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

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

Metal mesh.

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

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

After that, the material is cut with scissors into separate sheets, taking into account how it is planned to place them on the surface of the wall or ceiling.

Then, using a perforator, holes are made for fasteners. The distance between them is proposed to choose from 25 to 30 centimeters. Thus, there should be about sixteen holes per "square".

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

Then they put construction beacons. Apply the first layer of mortar using a trowel. It is important to properly push the solution through the cells. Then spread it evenly over the entire surface. Wait for the layer to dry before moving on to the next one.

We choose metal.

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

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

A solution with clay also requires the use of metal reinforcement. Suitable material with cells of 50 to 50 millimeters.

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

Another point: rolled material is used for facade work. Indoors, sectional is usually used.

A question of price.

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

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

With my own hands.

You can install the reinforcement by inviting specialists, but you can do it on your own. The main thing is to follow the instructions exactly and remember the important nuances.
When properly installed, the grid for plastering the ceiling and walls can prevent various problems in the future:

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

Shingles for plaster.

This method of leveling the surface has long sunk into the past. Today there are a huge number of alternatives, each of which is described above.
Shingles for plaster were applied in the old days and, in essence, performed the same functions as a modern grid. In old houses and buildings, these structures can still be found as part of plastered walls.

The mesh is a rolled building material used to reinforce internal and external surfaces for various purposes. The maximum effect is observed in new houses that have not yet passed the shrinkage stage, but in a number of works it is indispensable. Cell sizes, diameter and base are different, in each case it is important to choose the right option.

Types and description
Scope of use
Mounting technology
average cost

Why is a grid needed?

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

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

Types of grids, features and applications

The base material must be strong, alkali-resistant, as light and durable as possible, steel, plastic and fiberglass have suitable characteristics. Metal products, depending on the manufacturing method and type of web, are divided into thin and flexible woven (with a small wire diameter), woven, welded (the most rigid, recommended for high base mobility) 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 grid for plaster, it is worth choosing a protected type, with a zinc coating, it better withstands the alkaline effect of cement and is less susceptible to corrosion.

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

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

What grid to use and in what cases?

The main determining criterion is the thickness of the applied solution; when working indoors, a reliable base and thin-layer alignment (up to 20 mm), it can be abandoned. When facing facades, reinforcement is always carried out: a metal mesh-reinforcement for plaster is selected when the wall level deviates more than 30 mm, while with significant risks of destruction of the base or shrinkage of the building, it must be welded. In other cases, fiberglass or plastic with a density in the range of 160-300 g / m2 is sufficient to close the standard masonry. Smooth foam plates that insulate the facade are advised to finish on light fiberglass.

It is better not to save on external surfaces; these areas require varieties coated with zinc or impregnated with alkali-resistant compounds. To exclude doubts, the material is checked by immersion in a soapy solution for several days, quality products do not spread and do not change color. When buying facade meshes, attention is paid to the value of the breaking load. On flat areas, a canvas with 1800 N and above is used, on curved areas - within 1300-1500.

When finishing the interior, the same rules apply - a thick-layer coating requires reinforcement with metal, a thin-layer one - with fiberglass or polypropylene. The latter type is also used as a masonry one: an elastic web with 5 × 5 cells is placed between bricks or blocks and increases the adhesion of rows and products. The recommended density range for synthetic meshes for internal plaster is 110-160 g/m2, which is enough to ensure crack resistance and keep the layer within 2-3 cm. adjoining the ceiling, reinforcing mastic roofs, serpyanka is well suited - a thin fiberglass with a cell size of 2 × 2 mm and a density in the range of 45-60 g / m2.

Do-it-yourself grid mounting nuances

The metal variety weighs the most and needs to be securely fixed with screws or nails. It is degreased (galvanized is simply washed with water or wiped with a rag) and cut with special scissors into pieces of the desired size, taking into account the obligatory entry into neighboring areas by 10 cm. In some cases, holes for dowels are prepared in advance, the step is 25-30 cm, on average m2 takes 16 fasteners. The edges, if possible, are fixed with a mounting tape (when working with coarse-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 view must be securely closed with a mixture, it is important to choose the correct cross section and method of connecting the wire, it is impossible to reduce the coating thickness below the recommended value.

When working with fiberglass and polypropylene meshes for plaster, the mortar itself or self-tapping screws and screws can act as fixing materials. In the first case, the canvas is placed in the middle of two layers; to increase the density, it is better to unwind it directly on the spot, and not cut it into separate pieces (the exception is the foam plastic finish, where segments are better suited). Plastered in the direction from the middle to the edges.

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

But a more reliable and correct option is to fix the dowels on 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 mounting beacons. The first layer of the solution is placed along the width of the product, after laying it, they proceed to the next one, tracking the approach to each other by 10-15 cm. 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 meshes, otherwise they depart along with the finishing composition. The 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 for 1 m2, rubles	Price per roll, rubles
Stucco Woven Galvanized Wire Mesh	Wire diameter - 0.25 mm	0.63×0.63	1×30	468	14040
	Wire diameter - 0.25 mm	1×1		208	6240
	The same - 0.4	2×2		162,50	4880
	The same - 0.4	4×4		143	4290
	The same - 0.6	10x10	1×60	65	3900
	The same - 0.6	15×15	1×80	62	4990
The chain-link is not galvanized	Wire diameter - 1.2 mm	6×6	1×10	240	2400
Welded galvanized	Wire diameter - 1 mm	10x10	1×25	240	6000
fiberglass mesh	Serpyanka with a density of 45 g/m2, white	2×2	1×50	18	900
	Plaster impregnated with alkali-resistant polymer composition, 60 g/m2, white	5×5		21	1050
	For facade, 160 g/m2, blue	5×5		31	1550
Plastic mesh Wagon S	Colors: khaki, black. Used for finishing and rough layers up to 1 cm thick	6×6	2×100	14	2800
Synthflex E	High-strength, flexible, biaxially oriented polypropylene, for reinforcing layers up to 5 cm	12×14	2×100	65	13000
C1-3, polypropylene	Grey, for reinforcing plaster (up to 2 cm) and masonry	13x13	1×30	21	630

Different types of mesh

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

Scope of use

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

Strengthening the base

The plaster grid is used both for internal, and external works. It is the basis of the leveling coating. The latter becomes stronger and more durable as a result. The mesh must be used to avoid the appearance of delamination, cracking, or to stop the process of crack growth itself.

The construction mesh for plaster is used to qualitatively prepare the base for further activities to decorate work surfaces. With proper installation and further plastering, it prolongs the 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 for their production.

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	66, 1415, 22*35	the fine-mesh version is a suitable mesh for plastering interior walls, while the coarse-mesh version withstands temperature extremes and loads from the outside well
fiberglass mesh	5*5	durable, resistant to moisture, cold and heat, chemical compounds material
plurima	5*6	made from polypropylene, chemically inert, used for external and internal work

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

Choice of working material

The main determining factor in the selection of material is its suitability for specific conditions, so the mesh for wall plastering is selected taking into account the following number of factors:

the required thickness of the created finishing coating;
the type of plaster mixture that 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 with the following types of mixtures:

cement-lime;
plaster;
cement-sand;
clay and others.

Various additives are often added to such compositions. Together with the main components, they have a certain level of chemical activity. This determines the degree of their influence on different materials from which the meshes for reinforcement are made.

Reinforced brick surface

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

fiberglass products are recommended to be used when the thickness of the created plaster layer is up to 3 cm, when there are also recesses, cracks in order to stop the expansion of old ones and the formation of new ones;
if the height of the formed coating exceeds 3 cm, then a more appropriate option would be to install a metal mesh: it is able to withstand the weight of the finish and not peel off at the same time;
plastic products are best used for thin gypsum mortars, and, for example, cement-sand compositions corrode such reinforcing material over time;
when using mixtures based on clay, 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 puttying;
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 oven with a cement-clay mortar, then you can use a chain-link, and with a thin layer of it - fiberglass;
steel products are suitable for joint use with compounds containing cement;
during the plastering work on the exterior walls of the house, material with cells of 3 * 3 cm is usually used, and their larger sizes are selected to tighten the surface;
for internal work, they mainly use material 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 above recommendations will allow you to choose the most practical material.

Features of mounting different types of mesh

Metal mesh for plaster, fiberglass or plastic, can be mounted using different methods. The choice of fixing 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 for leveling the walls is reinforced by pressing the mesh into the mortar of the required thickness applied to the surface.

The best way to create a finishing coating (covering or decor) is to fix the adhesive web on a dry base with special fasteners.

When the area of the area to be trimmed is small, then you can use the working mixture for fixing, applying it pointwise.

It is enough to simply fix the paint grid with a thin layer of mortar.

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

perform markup for the installation of beacons;
holes are drilled along it, into which dowels are then inserted;
set the screw heads according to the level;
apply the solution to an area equal to the width of the canvas used;
a grid is immediately applied to the plaster, threading the caps from the screws through it;
throw the mixture further;
overlap (10 cm) fix the next strip;
so continue until the entire room is reinforced;
install beacons.

The solution should be smoothed over the canvas evenly, starting from the middle of the strip, while moving towards its edges. When creating a thin layer, fixing the fiberglass to the staples with further application of putty justifies itself.

Installation of a metal mesh

The stucco metal mesh is fixed in the following sequence:

cleaned of the lubricant composition by rinsing with water or wiping with a damp cloth;
with scissors for metal, cut the canvas into pieces of the desired size;
every 25-30 cm holes are drilled with a diameter of 6 mm for dowels (about 3 mm deeper than the length of the plastic part of the fastener), insert them;
using screws and mounting tape - fix the material on the surface;
the following fragments are laid with an overlap of 10 cm;
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 - reinforces the plaster with a mesh.

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

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.

For the correct implementation of the reinforcement of the walls with a mesh, it is necessary to take into account the type of mortar used, the place of installation (outside or inside the building), the expected height of the coating. It is also required to use suitable mounting technology. Compliance with the above conditions allows you to plaster walls or ceilings with high quality, minimize the possibility of cracking, and not be afraid of shrinkage at home.

Currently, plaster is ranked among the most popular finishing materials for interior surfaces of ceilings and walls.

The technology has stepped far forward, and not so long ago, shingles for plaster were used to strengthen the surface of the walls. Now reinforced construction mesh for plaster is widely used.

1 Application features and types

The plaster mesh is used to securely mount this same plaster on the wall, its thickness can be different. The presented wall finishing technology implies the use of those products that have a certificate of conformity.

As a rule, their typical size and aspect ratio is 10 × 10 mm. Such a grid, having dimensions of 10 × 10 mm, can be mounted on the inner surfaces of the walls quite simply and without much difficulty. A mesh for plaster, which has an appropriate certificate of quality or conformity, is used to fasten or reinforce walls from the inside of a building.

In this case, the thickness of the internal walls is not critical, but mesh for plaster performs its fastening function. In most cases, the plaster mesh has dimensions of 10x10 mm. Before you start its operation, you must make sure that there is such an accompanying document as a quality certificate.

The thickness of the product may vary slightly within acceptable limits. Such a product, used for plastering on the wall, must have a certificate.

This certificate confirms the full compliance of the product with all norms and requirements. It should indicate the thickness and dimensions(for example, 10×10 mm). Such products can be made using polyurethane or metal, and you need to fix it to the wall after reading all the relevant instructions.

In this and similar cases, the thickness of the walls does not affect the quality and pace of the work performed. Fastening of a product with dimensions of 10 × 10 is carried out using special adhesives, self-tapping screws, screws, as well as other devices, the use of which is allowed by the certificate.

The thickness of the products, in this case, must correspond to the technological conditions. For the most part, the mesh is sold in the form of rolls and can have different sizes, the most common among them is 10 × 10 mm.

When buying, be sure to pay attention to the quality certificate. Depending on the method of applying plaster to the surface of the walls, fastening of metal or analogues can be carried out with an orientation towards different methods of implementation.

The certificate of metal products may differ from the same document related to plastic products.

That layer of plaster on the wall, which is called the bottom layer, is reinforced with the participation of the selected mesh product immediately on top of the already applied mortar. The applied solution should have the desired thickness and slightly press the mesh. The certificate reflects all these manufacturing points in their respective points.

The most acceptable option during which the last decorative layer will be applied, it will be the one during which the reinforcement will be attached to the wiped and dry surface with the help of special devices.

The certificate allows the use of such technologies. In the event that the surface of the walls being processed does not have a large area, the plaster mortar itself can act as a fastener to the wall.

At the same time, it should be applied to the treated surface of the walls in a dotted manner - this will contribute to the reliable fixing of the grid.

After completion of this action, the entire thickness of the plaster layer is spread evenly over the entire surface area. Currently, there are a number of types of products presented, among them it should be noted:

universal (small);
universal average;
universal large;
fiberglass;

mesh plurima;
armaflex;
synthoflex;
steel;
galvanized.

The presented types of products are distinguished by a wide range of functionality and exhibit a high degree of resistance to high temperatures and harmful chemical effects.

Some of the presented species are characterized by their chemical inertness and Can be used for both outdoor and indoor finishing works. These products are distinguished by the presence of artificially reinforced nodes and are used in areas where they are under increased load.

2 What is the best grid to use?

When choosing the presented products, the primary parameter is the value of its thickness. Before work is carried out, the lowest point located on the ceiling is located, and then it is marked using a laser or building level.

After carrying out such manipulations, it will be possible to assess the maximum thickness of the plaster layer, which will subsequently be formed. After a certain result is obtained, a series of certain actions are performed.

In that case when the plaster thickness parameter will not exceed the value, equal to 20 millimeters, provided that there are no rusts at the ceiling base, it is possible to apply a plaster layer.

After that, you can proceed to the installation of beacons. If the presence of rusts is observed on the ceiling, or the leading layer has a thickness of 20-30 millimeters, it would be most rational to use a mesh product made using fiberglass.

This is due to the fact that the main purpose of the presented meshes is to protect the entire surface from cracking.

If the layer will have a thickness equal to 30 millimeters, then apply.

It will be able to prevent peeling under the influence of its own weight with a high degree of efficiency.

If the ceiling is uneven, and the height differences are more than 50 millimeters, then the plaster will need to be abandoned altogether.

2.1 Technical details of installation and application

When buying such a product, you need to take into account the fact that the cell size should be slightly larger than 5 × 5 millimeters, with a density value from 110 to 160 g / m².

The presented material in most cases should have such a quality as resistance to the harmful effects of alkalis. At the same time, the indicator of the minimum thickness of the plaster layer when using a mesh made using fiberglass should be 3 millimeters, with a maximum value of 30 millimeters.

Before starting work, the product must be trimmed in compliance with the proportions and dimensions of the canvas itself. The value of the web size will directly depend on the location of the grid. It can be longitudinal or transverse.

If there is rust on the ceiling, then the grid is located there in one solid canvas with an orientation to the location of each of the seams. In the event that rustication is absent, there will be no requirements for a special arrangement of products.

It is enough that during the performance of work the entire working surface will be evenly covered with a grid.

Trimming is best done with a margin of 10-15 centimeters in order to strengthen the existing seams located between the walls and the ceiling. At the beginning of the work being done, the entire surface is covered with the very first putty layer. On top of it, a plaster mesh is applied and slightly pressed.

Next, the second layer is applied. According to the regulations, such an operation can be carried out in one go. Or you can wait until the intermediate layer dries. The fiberglass mesh is designed to be attached to the wall with screws or staples, the plaster will lie on top.

The presented method is applicable when it is planned to create a thin plaster layer. Then the product will be located right in the middle of the plaster layer.

If the layer thickness exceeds 10 millimeters, then the mesh can slide to the edge, while reinforcing not the plaster, but only its surface will occur. The initial working stages are carried out taking into account the following algorithm.

In the course of plastering wall surfaces in any room, specialists use a reinforcing mesh under plaster to prevent peeling of the plaster layer and the appearance of cracks. A special mesh helps to strengthen the main finishing material.

Varieties

There are several types of mesh for plaster; they differ in operating parameters and features of use. To date, a number of manufacturers offer a wide range of mesh products.

There are the following varieties:

Rates

How much does a plaster mesh cost? The cost of the mesh intended for plastering wall surfaces is different. The price is formed based on the type of product and the material from which it is made, operational parameters.

Approximate price:

fiberglass woven (1x55 m) - from 750 to 8000 rubles, depending on the density;
based on polypropylene (1x30 m) - from 700 to 1200 rubles;
from steel (1x10 m) - from 50 to 95 rubles;
with a galvanized coating - from 350 to 580 rubles.

Subtleties of choice

The need to use reinforcing mesh devices arises when plastering bases made of concrete, wood and brick.

Attention! If the mesh is not used, the likelihood of peeling of the facing material increases.

The choice of the type of building reinforcing mesh depends on the type of work to be performed, the thickness of the finishing layer and the conditions of use.

What mesh is needed for wall plastering and which is better? There are several rules that help you decide: what kind of mesh and in what situations is more suitable, and in what cases you can do without the use of a reinforcing product.

For facing the ceiling surface, monolithic reinforced concrete load-bearing structures and a plaster density of less than 10 mm, it is not necessary to use mesh packing.

It is desirable to install a fiberglass mesh with a finishing density of less than 30 mm.

Metal should be used with a density of more than 30 mm.

With a galvanized coating - it is considered the best option for facade work and for interior cladding in high humidity conditions.

Reinforcement with a plastic type of mesh is preferably used with a finishing layer with a maximum thickness of 20 mm, as well as in case of the likelihood of subsidence of the base. Excellent for gypsum surfaces.

To eliminate shallow cracks and mask joints, you can use adhesive tape: it will give strength to weakened areas of the base.

To reinforce slopes with a large plaster layer, a steel mesh is used, with a small layer - a fiberglass product. With a slope width exceeding 15 cm, and with a plaster layer of less than 6 mm, reinforcement is still used.

Plastering of wall surfaces on a grid

The plaster mortar allows you to level the wall surfaces, but if there are a large number of cracks or other defects on the walls, only plastering is not enough to smooth the base. In such a situation, it is recommended to use wall reinforcement with a special mounting mesh.

Reinforced surfaces become stronger, their ability to withstand mechanical pressure increases.

The technology of plastering wall surfaces includes several stages:

Foundation preparation. First of all, the old finishing material is removed from the surface, crumbling places are leveled. After removing the worn layer, the base is cleaned of dust and dirt, if there is mold, it is scraped off with a steel brush. After that, the cleaned surface is covered with a primer in order to improve the adhesion of the base to the plaster material and protect the wall from harmful microorganisms.
Reinforcing mesh installation. First of all, you need to measure the height of the wall, and then cut the canvas to the required size. Cut the mesh with scissors designed for cutting metal. The cuts are attached to the wall surface by laying them on top of each other by about 10 cm. How to fix the grid for plaster? It is fastened with self-tapping screws, fixed with washers or galvanized tape.
Installation of plaster beacons. To level the surface, it is preferable to use a profile for plaster. First, the location of the extreme beacon is indicated (vertically), they should be fixed with two screws. After that, the extreme beacon is mounted on the reverse side. To evenly space all the guides, pull the thread between the extreme beacons. Then install intermediate beacons at a distance less than the length of the rule.

On a note! Use a level to check the position of the beacon.

Plastering. Before you start applying the material, prepare a solution with a consistency close to sour cream. The primary layer is applied by spraying with a trowel so that the solution seeps through the mesh and adheres to the wall. It is important that the solution does not flow down the wall. The spray density is about 10 mm. After drying the primary layer, prepare a thicker substance and apply it to the wall surfaces with a trowel. Level the surface with a rule, pressing it against the beacons and turning it from the bottom up to remove excess mortar. After the plaster layer has dried, remove the beacons, and seal the recesses with mortar.

Corner Alignment. The joints of the ceiling surface and the walls are manually leveled with an angled spatula. The outer corners are leveled with perforated steel corners. This completes the work on plastering the walls.

We considered the option of installing a steel plaster mesh. Installation based on durable materials is somewhat different.

Fiberglass mesh installation method:

Preparation for the installation of fiberglass reinforcing material is no different from similar work for attaching steel mesh.

Attention! When applying the solution, make sure that it is evenly distributed over the surface of the grid, smooth it out - from the center of the canvas to the edges. Press the edges at the corners with a rule or an angled spatula.

The method of mounting a polymer mesh involves a number of steps.

At the first stage, the foundation is prepared. Preparatory work includes cleaning and priming the surface.
The next step is to measure the wall surfaces and cut the canvas in accordance with the measurements taken and add a margin of about 10 cm (for overlapping the joining of the canvases).
After that, the preparation of the adhesive-based composition is carried out.
The main stage is the application of the initial plaster layer with a density of 3-5 mm with the indentation of the paint grid into the solution.
After the initial layer dries, the surface is covered with a primer and the final layer of plaster is applied, leveling is carried out by the rule.
At the last stage, the dried wall surfaces are sanded.

A few useful quick tips allow you to do the job of plastering walls as efficiently as possible.

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

The use of reinforcing plaster mesh in the process of performing internal work on plastering wall surfaces allows you to do it efficiently. The presence of the mesh prolongs the service life of the finishing material, the main thing is to choose the right type of reinforcing mesh, based on the conditions of its use.

Video

See the features of wall plastering with mesh on the video:

Plaster on the grid is an effective way to rough finish the walls. A particular advantage of this method is that it can be used to apply a thick layer of grout that will not slip and flake off under its own weight during the finishing process. What is the procedure itself, what types of mesh to use in certain cases, and how to fix them? More on this later.

When plastering walls without the use of a reinforcing layer, there is a high risk that the applied mortar will simply fall off the base. And when finishing brick and wooden surfaces, the plaster may begin to peel off and crumble even after the repair is completed. This is usually due to insufficient adhesion of the materials indicated above. The grid allows you to form a monolithic slab, which is not afraid of any load. Different grids are designed for a certain 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 does not crack during long-term operation. Even if the mortar preparation technology is violated, the mesh will ensure the integrity of the plaster layer.

Grid types

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

fiberglass;
metal.

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

When applying a thin layer of mortar on a flat surface, a fiberglass cloth 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 meshes also come in several types:

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

How to fix a metal mesh?

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

Before mounting the canvas, it is necessary to cut off the desired piece, having previously measured the area on which the plaster will be applied in the future. For cutting thin material, metal scissors will suffice. If the product is made of wire with a diameter of 2 mm or more, you will need a grinder. The cut cloth must be degreased by wiping it with a rag moistened with a solvent.
Fastening the mesh under the plaster should start from the ceiling. The top of the material is fixed along the entire length with self-tapping screws, under the caps of which cut fragments of the mounting tape are placed. Wide washers can also be used as spacers, but they are much more expensive than tape.
When mounting on a concrete or brick surface, drill holes in the wall and insert plastic dowels into them.
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. At the fixing points, the canvas may come into contact with the wall, and in the intervals between the fasteners, it should not come into contact with the surface, since in this case the quality of the plaster layer will deteriorate.
At the joints, the material is mounted with an overlap of 8-10 cm.
A properly fixed canvas should be well stretched. If the material does not vibrate in places where there are no fasteners, then everything is in order. Otherwise, the formation of voids under the mesh is possible, which will adversely affect the quality of the finish.

Installation of fiberglass

In this case, the plaster mesh is attached to the wall by fixing the material only along the perimeter of the canvas. First, with the help of self-tapping screws, the upper edge of the mesh is fixed 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 only one plaster solution; if difficulties arise, you can use self-tapping screws

Since the mesh was initially rolled up, 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 above, from any corner of the room. The joints are overlapped with an overlap of 15-20 cm.

Should know! It is best to cut the material so that you can stretch the whole canvas. This will provide a higher strength of the plaster layer.

Preparing the wall for plaster and installing beacons

Even when using a grid, the surface needs preliminary preparation:

First of all, the wall is freed from the old finish (if any) - paint, plaster, 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 metal brush.
After that, 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 fabric, you need to help form a flat surface during the plastering process. A special profile is used as beacons.

Installation is the following procedure:

Using the building level, set the extreme profile in a strictly vertical position and fasten it with two self-tapping screws.
Next, the lighthouse is fixed with a plaster solution.
The next step is to install the beacon on the other side of the wall. To mount all profiles in the same plane, a thread is pulled between the extreme guides.
Then the remaining beacons are installed, the distance between which should be less than the length of the rule.

Surface plastering

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

First stage. Plastering is usually done in 2 or 3 layers, depending on the wall material. The initial layer is applied by "spraying". To do this, prepare a solution that should resemble sour cream in consistency. The finished mixture is thrown with a trowel or ladle in random order. The solution can also be smeared, but the first option is easier and faster. The applied mixture is leveled with a spatula. The thickness of the "splatter" layer should be about 10 mm.

Second phase. After the first layer has completely dried, a thicker mixture of pasty consistency is kneaded. The solution applied with 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 grooves are closed.

Third stage. The final procedure is the final leveling of the frozen surface. To do this, prepare a liquid solution and, applying it to the wall, rub it in a circular motion with a trowel.

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

Modern standards for interior and exterior surfaces have very high requirements for aesthetics, durability and reliability of the finish. Wall plaster mesh significantly improves the quality, which generally has a beneficial effect on the final result. And although the reinforcing layer is not visible, it is he who ensures the stability of the structure, preventing the plaster from cracking.

In the article, we will analyze the questions: what kind of mesh is used for plastering walls, what type is used in a particular case, and why should the plaster layer be reinforced.

Grid for wall plastering, photo - types of cells

Reinforcing mesh for wall plastering - types and characteristics

In finishing work, several are used:, and various options for mixtures with a change in the proportions of the components and the addition of additives to improve the quality of the solution. For each type of work, the reinforced grating is selected individually. It depends on the:

selected mixture;
the material from which the surfaces are made -, etc .;
operating conditions of the coating: outdoor (,), indoor, in rooms with a difficult microclimate (unheated, bathrooms, etc.)

Reinforcing mesh for plastering corners

We can distinguish the following types of reinforcing gratings, the most popular in the building materials market:

Masonry - plastic mesh for plaster, made of polymers, cells of a standard size 5 * 5 mm, used in brickwork.
Universal mini - made of polyurethane, cells 6 * 6 mm, suitable for both rough plaster and fine finishing work. Medium, cell 13*15 mm, for finishing up to 30 mm thick in small areas. Large with a cell of 35 * 22 mm - a mesh for plastering the facade, it reinforces large areas for a thick layer of plaster: the outer walls of houses, warehouses, etc.

Fiberglass mesh for facade plastering - universal for all types of work

Construction mesh for plaster made of sterol fiber, standard mesh size 5 * 5 mm, tolerates chemical and thermal effects well, durable. This type is almost universal, its use has no restrictions.

Plurima polymer mesh for plaster, oriented on 2 axes, with a cell of 5 * 6 mm, light, inert to chemical attack, used for interior and exterior work.
Polypropylene armaflex grating, distinguished by reinforced knots, mesh size 15x12 mm. Heavy-duty, used in areas where heavy loads are placed on the plaster.
Syntoflex made of polypropylene, cell 14*12 mm or 35*22 mm, not afraid of exposure to chemical environment, lightweight, durable. Suitable for plastering interior walls and facades.
The steel grating is made of metal rods of different cross sections, soldered in knots, the cells are from small to very large, it tolerates mechanical loads well, but it should only be used for internal plaster, as it is susceptible to corrosion under the influence of atmospheric phenomena.
Metal mesh for wall plastering, galvanized, made of rods of different sections, welded nodes, different mesh sizes. Universal for outdoor and indoor work, not afraid of difficult operating conditions.
Chain-link - a metal mesh for plastering external and internal walls, under a thick layer, a distinctive feature - wicker cells, come in different sizes.
Expanded metal mesh. It is made from a single sheet of metal, after cutting holes, it is pulled out to make diamond-shaped cells in a checkerboard pattern. It is used mainly under a thin layer.

Expanded Galvanized Grating

Selection conditions

The grid for wall plastering is also needed so that as much as possible, and the solution does not exfoliate from the surface, cracks do not go after drying. This is the skeleton that provides the strength and integrity of the structure.

Advice: If the plaster is not more than 20 mm, then the reinforcing layer can be skipped.

If there are rusts on the walls, ceilings, facades - depressions, grooves, recesses, usually reaches 30 mm, in such works glass fabric reinforcement is used more often than others, which is used with a layer thickness of 3 to 30 mm and prevents.

If the thickness of the finish is more than 30 mm, it is advisable to use metal gratings, they will prevent the heavy layer from peeling off the surfaces. Metal meshes are relevant when plastering very uneven surfaces and when using.

Over time, corrodes plastic mesh, it is usually applied under a small thickness. A canvas with a mini cell of 2-3 mm is used for finishing wall putty.

Welded grating for finishing brick surfaces

If earlier shingles were used for, now an alternative to it is a chain-link mesh, which has proven itself over time. It is also actively used for finishing walls with insulation.

Fiberglass fabric for reinforcement comes in different densities, it is convenient that it is produced in compact rolls, it is applicable for walls, ceilings, self-leveling floors. It is moisture resistant, which allows it to be used for swimming pools, to reinforce the roof with a water-repellent layer. The elasticity and strength of the material make it possible to use it for sealing inter-plate gaps and sealing cracks in the plaster layer, in this case a sickle - a self-adhesive tape of different widths - will be a good solution. Due to its thermal and frost resistance, fiberglass cloth is also used as a facade mesh for plaster.

Reinforcement is mandatory if the width of the slopes is more than 150 mm, with a plaster thickness of up to 30 mm, fiberglass is used, a thicker layer is applied to metal gratings.

Important: The reinforcing frame must be integral, so each subsequent sheet is attached to the previous one with an overlap of at least 100 mm.

For plastering fireplaces and stoves, metal reinforcement is often used, it is nailed between the joints of the masonry. Recently, in these works, a glass fiber sheet is often used, which is glued to the surface with a liquid solution. The choice depends on the thickness of the finish.

Mesh for plastering external walls: woven from galvanized wire, with a cell of 10 mm 2, chain-link - for large areas. Welded mesh facade under plaster is an ideal solution for new buildings, where the walls will shrink. If the thinnest layer of plaster is required, fiberglass, expanded metal and polymer mesh will do.

For a thick layer of screed, it is better to use a metal grate

home > Civil Engineering