Reinforcing metal mesh for plaster. Metal plaster mesh: the pros and cons of using. Choosing a mesh

During construction, reinforcement is an indispensable material. Reinforcement allows you to strengthen the structure and extend its service life. But why do you need to reinforce the walls, and what materials are needed for the work? We'll figure out.

Very often, during the construction or repair process, you may encounter many wall defects that are quite difficult to disguise or remove completely. You can level the wall with a ball of plaster. But if there are many rough bumps or cracks on the wall, then the plaster itself will not be able to hide them. In such cases, you can apply the reinforcement of the walls with a mesh.

The reinforced surface is more elastic and better absorbs mechanical loads. Reinforcement of walls with mesh is recommended if the thickness of the plaster is 2 centimeters or more.

What is reinforcement used for?

Reinforcement is used in such cases:

Wall irregularities. In the process of leveling the walls, you may encounter very large irregularities, to hide which you will have to make a large layer of plaster. But the plaster itself is very heavy and if the layer is quite thick, then it can swell and peel off.
Too much flat wall. In such cases, the mesh helps the mortar adhere more tightly to the wall.
Cracks. With the help of mesh reinforcement, the size of large cracks can be significantly reduced, and if the cracks are smaller, then they can be completely hidden. Also, the mesh prevents the appearance of cracks and microcracks, if used during the construction process.

How to choose the right mesh for reinforcing the wall?

There are many nuances to be aware of when choosing a grid. Reinforcement mesh can be metal, plastic or fiberglass.

Metal mesh is suitable for reinforcing walls with large irregularities (more than 4 centimeters). The metal works well in an alkaline environment and such meshes can be used for plastering with a solution that includes cement. It is also recommended to use metal meshes if the plaster will be carried out with clay. Only in this case it is better to take a grid with a cell size of 50 × 50 millimeters. It is also good to reinforce with metal mesh the walls, which are often subject to mechanical loading (walls of the garage, the first floor of the building).

The use of a plastic mesh is possible only if the plaster does not contain cement. Often used with gypsum mortar for finishing wall plaster. Such a mesh is cheaper than metal or fiberglass, but it is also not durable. When working with such a mesh, experience is needed, as it quickly sags and deforms.

If the plaster layer is thinner, then fiberglass mesh may be used. Such a mesh relatively well keeps the opening of cracks, but small sizes.

Mesh installation

In order to attach the grid to the wall you will need:

dowel-nails d=6mm and self-tapping screws 4.5mm;
perforator;
wire for knitting mesh;
scissors for cutting metal:
lighthouses.

The surface of the wall must be cleaned and treated with a primer. Cut the mesh into pieces so that the piece is the entire height of the wall. We start fastening from the bottom with the help of dowel-nails and go up.

To fix the grid, you can bend the edge of the nail or use a galvanized mounting tape. Also often the mesh is fixed with a knitting wire. For this, the dowel must not be completely hammered in and the wire must be tied to the hats with the letter Z. After fastening the wire, the dowel is finished off.

When calculating required amount dowels you need to know that about 16-20 pieces will be spent on 1m².

In order for the mesh not to sag or deform, it must be well stretched and pressed firmly against the wall surface. If there are places where the grid lags behind the wall by 1 centimeter or more, then the plaster may peel off the surface there. The joints must be made overlaid. After fixing the grid, beacons are set.

Then you can proceed to the first layer of plaster. It must be made with a liquid solution. It is necessary to apply the plaster mortar with sharp movements so that it adheres well to the wall between the cells of the reinforcing mesh.

If the first layer has dried well, then you can apply the second. The finishing ball of plaster is made from a thicker solution. Application must be done from the bottom up.

Facade finishing is one of the most important construction operations. Coating external walls exposed precipitation, freeze/freeze cycling and exposure to harsh ultraviolet rays. Such difficult conditions operation put forward increased demands on the quality of the finish. Eliminate the marriage facade walls ah very expensive and long. We will have to mount scaffolding, wait for good weather, remove construction debris. To prevent the occurrence of unpleasant situations, you need to take all measures to prevent them.

Finishing of front walls is carried out by various materials and technologies. The reinforcing stack is used in two cases.

For improvement performance characteristics plaster layer. For such purposes, it is better to use a metal mesh made of galvanized wire.

whole metal grid

The fact is that among the many advantages of foam blocks, it is imperative to pay attention to one very significant drawback - low physical strength. One more problem - concrete blocks begin to crumble when freezing / freezing in conditions of high specific humidity. Eventually cement plaster begins to flake off with all the negative consequences.

The reinforcing mesh allows the plaster to adhere to the wall surface. The talk that such a mesh should be used with a large thickness of the plaster, that due to this, cracks do not appear on the plaster, have only a partial confirmation. First, there are simpler and cheaper methods to prevent cracks from appearing in thick plaster. The simplest is to throw the solution in a thin layer in several steps. Secondly, to increase the adhesion of the solution with facade wall possible due to a slight increase in the amount of cement in the solution. If this is not enough, then a spray of cement milk is done.

To protect the insulation of facade walls from destruction. reinforcing facade mesh applied during finishing foam insulation boards.

Not to improve the fixation of the adhesive to the surface of the expanded polystyrene and to prevent cracks, as some "sofa" builders write, but for mechanical protection.

Why do we say so? The surface of expanded polystyrene is protected from the negative effects of ultraviolet rays and, oddly enough, from damage by birds. For some unknown reason, birds are very fond of pecking foam, if left unprotected, then soon many large and small depressions will appear on the surface. Conclusion - polystyrene foam must be closed. The cheapest and reliable method- use glue.

By the way, the advertising characteristics of manufacturers of plastic reinforcing meshes “they are not afraid of UV” do not affect their actual performance indicators. The point is that even the most thin layer glue or other cement-sand mixture completely does not transmit ultraviolet rays. Why should a consumer pay for properties they don't need? And one more nuance. Most often, builders fix the reinforcing mesh on the entire wall. We think that this is done either out of ignorance of physical properties, or a desire to earn more. We recommend using a reinforcing mesh to a height of 1.5–2.0 meters, there is no need to go higher. No one will damage the finish screed on foam plastic so high. Mechanical damage occurs due to various impacts, careless chores near the facade wall, etc.

Types of facade reinforcing meshes

Facade reinforcing meshes are made of galvanized wire or polymers. The former are used for facade plaster, and the latter for universal use.

Name	Cell sizes, mm	Roll dimensions, m	a brief description of	Approximate cost, rubles
Safety	2×2	1×50	Production material - fiberglass, used to reinforce plaster near door and window openings, to align the joints of insulation boards	900
OXISS	5×5	1×50	The mesh has a reinforced protection against alkalis, can withstand significant dynamic and static forces for a long period of action.	1050
Facade fiberglass mesh	5×5	1×50	For holding plaster of concrete facades and insulation boards. Withstands a tensile load of at least 1400 N/cm.	1400
STREN C5	22×35	2×25 2×50	Withstands rough and fine facade plaster up to 5 cm thick.	2750
KREPIKS Facade 1300	4×4	1×50	Fiberglass, there is protection against alkalis and ultraviolet radiation.	1560
KREPIKS Facade 1500	5×5	1×50	Reduces the likelihood of cracking due to thermal linear expansion	1970
KREPIKS Facade 2000	4×4	1×50	For reinforcing finishing plasters during the finishing of the insulation layer of the facade	2300
	6×6, Ø 0.6 mm	1x15	Increased strength, resistant to precipitation and sunlight	1110
	10×10, Ø 0.8 mm	1x15	For draft facade plasters 3–5 cm thick	1330
	25×25, Ø 1.0 mm	1×25	For strengthening facade walls, universal use. Hot dip galvanized wire, minimum coating thickness 20 µm	1770
TsPVS grid	20×20, Ø 0.5 mm	1×25	All-metal expanded metal. It has an increased area of contact with a solution of facade plaster.	580

Modern facade mesh

Prices for construction reinforcing meshes

Construction reinforcing mesh

Metal mesh fixing technology

Metal meshes are used only for cement-sand facade plasters, foam insulation is not finished with them. The reason is the small thickness of the screed on foam boards. And the metal mesh cannot be aligned with such accuracy, it must be pressed with a thick layer of mortar. The metal facade reinforcing mesh is able to withstand great efforts, it is used if it is necessary to apply a thick layer of plaster on an uneven base.

The fixation algorithm has several features, the implementation of which guarantees the expected effect. You can lay the grid in both vertical and horizontal stripes. For the strength of the plaster, this does not matter, decide for yourself how it is more convenient for you to work. How to properly fix the metal mesh to the facade wall?

Step 1. Take the dimensions of the wall, cut the metal mesh along them. Select the cutting tool according to the wire diameter. Universal tool - scissors for metal.

If they are not there, then a thin mesh with a wire diameter of up to 0.8 mm can be cut with ordinary scissors. True, after that these scissors will have to be sharpened, they will no longer cut the paper.

Prices for construction scissors for metal

Step 2 The metal mesh can be fixed with dowels, the length of the hardware should provide a strong fixation. For facade walls made of foam blocks, ordinary nails 80–90 mm long can be used. They are easily hammered into blocks with an ordinary hammer, working with them is much faster and easier. Nails are much cheaper than dowels, and the quality of fixation is no different. Use dowels only on brick or concrete facade walls.

Step 3 Electric drill with a puncher, drill the first hole for the mesh. The depth of the holes should be several centimeters greater than the length of the plastic part. Otherwise, it is impossible to insert the dowel to the desired depth - the hole is slightly filled with brick chips during drilling and reduces its effective depth. It is difficult to remove it from there, it is better to drill more.

Important. The height of the protruding part of the dowels should not exceed the thickness of the plaster. Follow this parameter on the entire area of the facade wall so that during plastering you do not have to adjust the dowels.

Step 4 Drill holes in one line at a distance of about fifty centimeters, hang a net on each dowel. Pull it a little, do not allow large irregularities. The position of the line does not matter, it can be vertical or horizontal, depending on the method of attaching the reinforcing metal mesh.

Step 5 Check the position of the opposite edge of the grid, if it is uneven, then move the grid to adjacent cells.

Plaster mesh fastening - scheme

Step 6 Everything is normal - continue to fix the grid, install the dowels in a checkerboard pattern. Most metal meshes are one meter wide, you will need three rows of hardware to fix them.

Important. In places where two rolls overlap, install the dowels at a distance of approximately 10 cm from the edge. Two strips of reinforcing mesh will be hung on these dowels at the same time.

Step 7 In places of windows and doorways mesh is cut to size. But there is nothing to worry about if you do not cut it off, but simply bend it. Just make sure that the edges of the bent sections do not protrude beyond the thickness of the plaster layer.

During the plastering of such a facade wall, the mortar must be applied in several stages. For the first time, the mass should be a little thicker than for the final alignment. Specific values depend on several indicators and are determined individually, taking into account the practical experience of the master. The consistency of the mortar is influenced by the weather, the ability of the facade walls to absorb moisture, the linearity of the wall, the maximum parameters of the irregularities, etc.

Step-by-step instructions for fixing plastic meshes

The durability of its operation largely depends on the correct implementation of the recommendations for installing a plastic reinforcing mesh on a foam insulation. In all cases, do not rush, work carefully. We have already mentioned that there is no need to reinforce the entire wall in height, it is enough to protect only the lower vulnerable area. But these are our recommendations, if in doubt - protect the entire surface of the facade wall.

Any brand of glue is suitable for gluing the mesh. Read the instructions, it should have high adhesion with plastic materials. In most cases, a final layer of adhesive several millimeters thick is applied over the plastic reinforcing mesh. The final coat is done facade paints or a thin layer of decorative plaster.

Step 1. Examine the surface of the plates. If they were fixed with dowels, then completely drown the caps and close the recesses. At the same time, you can close the slots, but this is not necessary. The fact is that the slots will automatically close during the application of the first layer.

Step 2 On the wall, draw a horizontal line along the height of the reinforcing layer. It will help to monitor the height of the application of glue. A thin layer of material dries quickly, and this not only causes an increase in material consumption, but also negatively affects the final leveling of the layer for painting.

Step 3 Prepare the adhesive according to the manufacturer's instructions. Always fill the container with water first, and then add the dry mix. This technology will greatly simplify the mixing process. Mixing can be done manually with a trowel or with a mixing attachment to an electric drill.

The second method is not only easier, but also more effective. You need to mix for several minutes, and then leave the mixture to stand for another 5-6 minutes. During this time, the moisture will be evenly distributed throughout the volume, the smallest dry lumps of glue will completely disappear.

Step 4 The glue is applied to the wall with a spatula, the longer it is, the smoother the surface is in the end. Professionals work with spatulas up to 70 cm in size, beginners can use shorter ones at first.

Practical advice. If you are just learning how to apply glue to the surface, then it is better to immediately get used to working with both hands. One gets tired - connect the second hand. Believe me, it is not so difficult, you just need to show a little endurance and patience.

Apply glue to the spatula with a trowel in the center of the tool. The quantity will be determined empirically. While applying the layer, hold the spatula at an angle to foam boards, press with medium force. Achieve a layer thickness of approximately 2-3 millimeters. Do not prepare a large amount of surface at once; for beginners, two meters per dyne is enough. If you do not have time to fix the mesh, the glue will harden, you will have to remove the old layer and make a new one.

Step 5 Try on the location of the plastic reinforcing mesh. If it does not fit into the window opening, trim the material.

Step 6 Glue one end of the grid, align it horizontally to the length of the prepared section of the wall. Make sure that the mesh lies flat without distortions and bends, be guided by a pre-drawn line on the foam.

Practical advice. The mesh should overlap with about ten centimeters. You can find recommendations not to smear the place of overlap of one line with glue, but to do it simultaneously for two rows. We do not recommend doing this, it only complicates the work. Glue the first row of mesh immediately across the entire width, including the overlap. The second line will be glued on top of the freshly applied glue. This method simplifies grid fixation and provides positive influence for quality.

Step 7 With your hand, press the mesh to fresh glue in several places, check its position again.

Step 8 With a spatula, begin to press the mesh to the surface of the insulation. Make sure that the glue of the first layer protrudes over the entire surface and evenly covers the mesh cells on the front side. If there are places with insufficient thickness of the adhesive, apply it again over the reinforcing mesh. Such omissions may appear in inexperienced craftsmen. Over time, you will learn to identify optimal thickness there will be no more glue and passes. Smear excess solution on free surfaces. You should not try to immediately make the surface perfectly flat, but you need to strive for such a result.

Step 9 Give the glue time to dry. It is better to leave it overnight, it is recommended to finish the surface grouting the next day.

That's the whole technology, the surface of the facade wall is prepared for painting or finishing with other materials. Once again, we remind you that plastic reinforcing mesh on insulated facades, it is used not to prevent cracks on the adhesive surface, but to prevent mechanical damage to the foam. Keep this in mind when making a decision.

Prices for popular types of putty

Putties

Facade mesh for building protection

Compliance with safety precautions during the construction works on the high-rise buildings- one of the main requirements for all developers. This is especially true of objects being built within cities. The facade mesh is fixed on the scaffolding and prevents construction waste and tools from falling onto pedestrian walkways. For such purposes, the cheapest of the plastic reinforcing meshes is used; after dismantling, it is suitable for direct use.

"Emerald" - a new grid for scaffolding

Question answer

Is it possible to repair exfoliated sections with a reinforcing facade mesh? It is possible, but it is better not to allow such situations. Unfortunately, in most cases, delaminations appear several months or years after finishing the insulated facade walls.

How is the repair done?

Revise the delaminated area. By hand, check the strength of the fixation of the mesh next to the exfoliated area. Prepare materials: glue and a piece of plastic reinforcing mesh. If the facade walls are painted, then you need to have the appropriate paint.
Pull the detached mesh towards you and with a sharp mounting knife cut it around the perimeter. Be very careful not to damage the foam. If during cutting the sect continues to flake off - excellent. In this way, you remove the entire problem area; in any case, it would exfoliate over time.
Cut out a new mesh for the patch, the size should be slightly larger than the freed area for the overlap.
Remove a layer of old glue from the surface of the foam.
With a spatula, carefully remove from the surface of the remaining mesh upper layer glue to the width of the new overlap. Apply the first layer of glue, sink the mesh into it and apply the second layer of glue.
After it dries, smooth it out. Pay special attention to the connection point. It should be as even as possible without sudden changes in height.

How does the quality of a plastic mesh depend on its price? Almost nothing. When choosing a grid, pay attention to the thickness of the canvas and the size of the grid cells. All other characteristics are nothing more than advertising ploys of manufacturers.

What is better than a plastic anti-corrosion coating of a metal reinforced mesh from galvanizing? Nothing, in addition, the price of such a mesh is higher than with galvanized wire. You need to know that the adhesion of all cement mortars to plastics is much lower than to galvanized surfaces. As for the service life and bearing capacity, these indicators are absolutely identical.

Is it possible to do without reinforcing mesh when plastering uneven facade walls? Not only possible, but necessary. We have already talked about simpler and effective methods work with such surfaces. Reinforcement with metal mesh is not used to prevent cracks, but to increase the bearing capacity cement-sand mortars. It is needed during the floor screed. One more nuance. The parameters of linear thermal expansions of the metal and the solution are significantly different. This means that microcracks will certainly appear in the places where cement and metal mesh adhere, because outdoor temperatures fluctuate significantly. IN enclosed spaces there are no such fluctuations.

Should reinforcing mesh be used on the plinth surfaces of facade walls? Use this technology only for foam-insulated plinths. In all other cases, it is not needed.

Photo - a pie made of insulation and mesh for reinforcement

How much does the cost of finishing facade walls increase due to the use of reinforcing mesh? The cost of finishing increases by no more than 3-5%. But if we take into account possible repairs due to mechanical damage to the foam, then a slight increase in cost is fully justified.

Video - How to glue reinforcing mesh

Repair is a complex set of works that help to make something beautiful, stylish and comfortable out of an ordinary room. To achieve the most best results it is important to use materials correctly and choose those that are best suited for a particular type of work. The use of plaster mesh is becoming more frequent, so you need to know all its advantages and disadvantages.

Peculiarities

Modern repair is not complete without the use of plaster, because the finished walls, floor and ceiling must be completely even, be heat and sound insulated, and serve for a long time and reliably. If a layer of plaster is not applied to the draft wall, then the desired effect cannot be obtained. In order for the plaster layer to hold securely, not crack or fall off, it is important to strengthen it. The grid is such a fastening mechanism.

If earlier they used more primitive and inconvenient materials to strengthen the surface for plaster, then with the advent of a grid of new materials, it became much more convenient and faster to work. The plaster mesh can be made of various materials, have a different cell size, its shape, as well as the weight of the canvas. All this causes different result from its use.

If necessary, veneer outer wall, it is often taken reinforced mesh with large cells, in some cases a chain-link is used.

Almost everyone hardware store now has a choice of grids for plaster, which have different lengths, which makes it possible to choose the optimal amount required material for work. The principle of working with it is quite simple, which makes its use more popular for repairing all rooms in a house, apartment, office, getting excellent final results.

The stucco mesh is very important element for repair work, because with its use, the finishing of the walls lays down easier, and the result lasts much longer. After plastering using a grid, the wall will not change its properties, and therefore the wallpaper will not be threatened by gaps in the joints or along the canvas itself. Painted walls are most prone to translucence of the imperfections that appear on them, therefore, choosing this method, it is important to take care of the reliability of the wall and its fortress.

Any type of cladding will be much more confidently attached to a properly processed surface, and its service life will increase several times if the surface has been reinforced and protected from various kinds of influences and unpleasant environmental factors.

Kinds

Due to the great popularity of the material, it was necessary to create a certain number of options that would allow puttying on different surfaces most convenient and efficient. So, there are such types of networks as:

Masonry mesh- this construction variety which is best laid on brickwork. The material of manufacture is polymer, and the cell size is 5 by 5 mm.
Universal- a small cell is used to reinforce the finishing and plaster mixture. It is convenient to use it in any area due to the optimal cell size, which is 6 by 6 mm.
Average universal. The material of manufacture is polyurethane, as in the previous case, but the size is different - by 13 by 15 mm.

Large universal– cells have dimensions of 22 by 35 mm and can be easily reinforced with it large area. It is convenient to make repairs in buildings with large dimensions.
Fiberglass. Its composition is fiberglass, which is processed in a special way. The size of the cells is not large and is 5 by 5 mm. This option easily tolerates temperature differences, exposure chemical elements, at the same time it has high strength and withstands a large weight of the plaster. This option is most often used in work, because it is light, convenient and has no special contraindications for use.
Plurima- polypropylene biaxially oriented mesh with a cell of 5 by 6 mm. This option is also convenient to use, because it is not exposed to chemical attack, is lightweight and can be used both indoors and outdoors.

Armaflex- a polypropylene type of mesh, in which reinforced knots are provided. The cell in this case is quite long and is 12 by 15 mm. The mesh has high strength, because it is most often used where the putty layer is very large.
Syntoflex- polypropylene variety with a cell of 12 by 14, 22 or 35 mm. The lightness of the material and the lack of reaction to chemicals make it possible to work with the mesh both indoors and outdoors.

Steel variant - These are soldered twigs of steel. The size of the cells can be very diverse. It is used for interior decoration, because under the influence of precipitation, the steel will not last long and will begin to rust.
Galvanized option involves the interlacing of galvanized twigs with each other, which is then soldered. This durable material, from which you can do surface leveling in any conditions, both indoors and out.

Reinforcing wall finish assumed the use of metal meshes, which have certain design options - these are welded, interlaced and expanded-drawn varieties. Cells can be different size, which is due to a specific task, for which rods with different thicknesses and types of their connection can be used. The resulting mesh has high strength and physical and mechanical characteristics. Wire mesh is used indoors, because it does not tolerate an increased level of moisture and metal corrosion can begin under its influence.

Galvanized variety it is applied for external works for a long time and very successfully, allowing for fast and high-quality reinforcement. The size of the cells can be very diverse, and the type of their fastening is welding.

Reinforcing mesh(also called chain-link) is used if the leveling layer is very thick and complex. When working with a cement wall, any mortar can be used, because there are no special selection criteria for such a material, which indicates its versatility. Often, brick, concrete, stone walls, but can also be applied to aerated concrete and wooden surfaces.

Metal grid expanded-drawn type can be made in any way. Due to the absence of welding spots, the resulting product is durable.

A mesh is used for plastering the inner surface of walls, where the layer of material is not more than 30 mm.

steel mesh has its advantages, but progress does not stand still and has been replaced by new material. plastic mesh belongs to modern types, it is used on aerated concrete and brick walls. In this case, it is advisable to choose a small cell, because a large one is more suitable for working on facades and a plinth. This material has no problems with a large temperature range, it can even be used to equip a heat-insulating layer.
Glass cloth variation consists of glass, in which there are no alkali impurities, but aluminum is added, which helps to significantly increase the strength of the resulting surface. Chemical influences this material is not terrible, the processes of decay are also bypassed, therefore this type is used most often and is considered the main one in the work.

The polyurethane variety is also universal.. It is very convenient to use it in large rooms. But the biaxially oriented polymer mesh is the newest material of all existing in this industry. Due to its elasticity and the absence of contraindications for use, it is a universal means for communications that conduct current when working on various facades.

Polypropylene mesh is very durable and can withstand a lot of weight on itself, so it is recommended to use it to strengthen bridges and roads.

In addition, there is also sickle, with which it is very convenient to close up cracks in the walls. Due to its fiberglass composition and the ability to self-adhere to the surface, this material is now indispensable for repairing walls and their puttying.

Mounting mesh for plaster is a very convenient invention that made the repair process easier and significantly improved its results. Varieties of grids with different sizes cells help to choose it correctly for a certain type of wall.

Thanks to the choice between metal and synthetic options, it is now possible to use the mesh both indoors and outdoors, which significantly improves the result of repairs and extends the life of an object.

Which one to choose?

If we consider metal type grids, then there are criteria by which you need to make a choice in the direction of one or another option. These include:

Qualitative characteristics of raw materials, which is taken for the manufacture of rod or wire. It is desirable to have information about the grade of steel alloy from which the mesh is made, which will show how high the quality of the product is.
The cost of a stack will be higher for small merchants, therefore, for large lots, you should contact the enterprises that deal with this. Large product turnovers make it possible to pay for it, which means not to set too high prices.
The quality of the rods themselves, the presence of a galvanized coating. Non-galvanized mesh can be used for internal works, if it is used for outdoor and not covered special composition, then soon it will rust and traces of corrosion can reach the outer layer of the finish.
You need to choose the right mesh type. If it is welded, then it will be better to keep the plaster on itself than twisted. This is important when work is being done with brick wall or from aerated concrete outside the house, where the layer of plaster can reach a significant size.
The rods must have a clearly defined thickness of the rods, therefore, when choosing a mesh, it is necessary to pay attention to the GOST standards in each package.

The plastic version of the plaster mesh is not inferior to any of the above options, it can be used on any surface, inside or outside, for the plinth and facade. The only case when it is worth turning to a metal mesh is the presence of a thick layer of plaster, which has a considerable weight; in all other situations, modern meshes will be much more convenient to use.

Usage plastic version involves a choice right size cells, which often comes down to 6 by 6 mm, but you can choose another option depending on your wishes and ease of use.

Dimensions

Since there are a lot of mesh options for applying plaster, there are a certain number of cell sizes for each of them. In spite of big choice, there are norms that are best suited for each of the types and determine the size of the cell. Here they are:

For masonry mesh most convenient size the cell is 5 by 5 mm. The main production material is polymers.
For generic type there are several options - from a small 6 by 6 cell and a medium 13 by 15 to a large 22 by 35 mm. The material for the manufacture is polyurethane. Used for interior decoration.
For fiberglass the optimal cell size will be 5 by 5 mm, and it is made from glass cloth.
Plurima it is characterized by the same cell size, but it is made of polypropylene and can be used for a wide variety of types of work.
For metal mesh No clear dimensions cells, it is selected for a specific type of activity, but due to its composition, it can only be used indoors.
For galvanized mesh the optimal cell sizes are 10x10 and 20x20, but if necessary, you can find more dimensions. This mesh is made of rods that are connected by soldering, which ensures a long service life and reliability of the finished surface.
Armaflex most often it is made with cells of 12 by 15 mm and is used in cases where a thick layer of solution is used in the work.

At the synthoflex a fairly large range of cells that can be used in work is 10 by 10, 12 by 14, 20 by 20, 22 by 35. It is made of polypropylene.
For steel mesh the size of the cells can be different, but the most popular is 20x20 mm. It is made from rods made of metal, which are soldered together. For fixing on the surface, a corner is required.
For plastic mesh There are no specific cell sizes. It is most often used for fixing polystyrene foam and put on glue, after which it is processed finishing putty. After that, the process can be considered completed.

It is important to choose the right mesh for repair and pay attention to the GOST indicated on the package. It is this material that will make it possible to make a good repair and guarantee the durability of the coating, otherwise you can expect any result from the repair work on the mesh plastering inside and outside the premises.

Mounting

Since there are many varieties of plaster mesh, there are also several ways to fasten it. The most popular of them are:

applying a mixture for plaster;
the use of self-tapping screws;
the use of dowel-nails;
fastening with screws.

If the first layer of plaster is applied, then the mesh is simply pressed into it. With such actions, you can effectively level the wall and get a strong coating. But for decoration, it is necessary to fasten the selected canvas with fasteners. If such a zone has small dimensions, then it can be applied to certain areas. For a paint grid, a small layer of mortar is enough.

If we talk about fiberglass, then to use it you need the correct sequence of actions:

drawing markings for fastening beacons;
making holes for dowels;
the screws are screwed to a certain depth so that the caps are at the same level;
applying the solution to the desired area;
on top of the plaster, you must immediately fix the mesh by threading the screw heads;
overlay mixture for a new site;
to fasten the next piece of mesh must overlap by about 10 centimeters;
it is necessary to gradually cover the entire room with a solution and apply a grid on it;
after that, beacons are installed;
subsequent work is already being done on the lighthouses in order to get a flat surface.

The process of smoothing the mixture along the grid goes from the middle to its edges. If the thickness of the putty is small, then you can use staples to fix the mesh, and then apply a new layer of putty on top.

If we are talking about the metal mesh, then the sequence of work is different:

cleaning from grease, washing the surface and wiping with a damp cloth;
separation into pieces of the desired mesh size with metal scissors;
preparation of holes for dowels at a distance of 30 cm from each other;
in dowels with screws and mounting tape you need to fix the grid on the surface of the wall;
a new section of the mesh is laid with an overlap of 10 cm;
after that, the installation of beacons and work on them.

The mesh installation technology is suitable not only for walls, but also for the ceiling. The main thing is to mix the solution correctly, because for ceiling work the mixture must not be too liquid, otherwise it will not stick to the surface.

The use of reinforcing mesh for the ceiling has its own characteristics. It is applied in cases where many small cracks appear on the surface, to get rid of which in the usual way does not work. In order to carry out work on the installation of a reinforcing mesh on the ceiling, it is necessary:

remove all lagging areas from the surface;
primer with a penetrating mixture;
dilute the PVA glue to liquid state and apply it with a roller to the places of cracks;
immediately put a piece of fiberglass on the place smeared with glue and again apply PVA on top;
each new layer of fiberglass must have an overlap of at least 5 centimeters.

Work is carried out until the entire ceiling is pasted over, after which you need to wait for the surface to dry completely and proceed to finishing with any convenient way. Following the above rules, you can easily and correctly make repairs to any room.

The choice of mesh depends, first of all, on the thickness of the plaster layer. If it is less than 3 cm, then it is recommended to use the fiberglass version, which is mounted on the solution. It dries very quickly, which helps to strengthen the wall and fully work with it.

If the plaster layer is more than 3 cm, then it is better to use a metal mesh that can easily cope with such a weight and help strengthen the wall surface. Usually this type is used for outdoor decoration.

If work is carried out in the bathroom or pool room, then it is important to choose reinforced material for work, otherwise the mesh will be covered with rust from moisture, which will appear on the wall surface and ruin it appearance and destroy the fortress.

If you need to make a plaster finish, then the best option there will be a plastic grate for this. In the finishing process, it is important to use a stack with minimum diameter cells. In the event that it is necessary to get rid of a crack on a wall or ceiling and close it up, the most convenient and practical option is the use of a sickle.

To work with slopes, it is important to use a metal grate in the case when a thick layer of plaster is applied. For a thin layer, fiberglass can be dispensed with, but any work with slopes must necessarily be using a reinforcing mesh.

In the case when you need to finish the stove, a massive mesh called a chain-link is used. It is attached to a composition of cement and clay, after which fiberglass is applied to a thin layer. Then the finishing process moves to the finishing stage.

There are cases when you can do without the use of reinforcing mesh. But it's still better to use it:

in the presence of joints from various materials- walls made of drywall and brick, the construction of partitions adjacent to other material;
on the corners of the rooms, where bearing wall connects to the interior;
in the presence of a monolithic concrete surface, which is not yet five years old;
there are places where the plaster has been lying for more than 20 years;
if the mixture has a high degree of shrinkage;
when working with drywall;
if the surface is to be painted, wallpaper will be glued to it or decorative plaster will be applied.

If you are working with a paint grid for the first time, you need to know exactly how it should be applied to the surface. The sequence of work in this case is reduced to:

preparing the base for the grid;
applying a base layer of putty to the area where the mesh will be applied;
installation of the grid itself;
pressing the mesh into the putty;
leveling the mesh with a spatula so that there are no bumps or wrinkles on the surface;
covering with a new layer of paint mesh putty.

After that, be sure to dry the surface until completely dry and apply finishing layer plaster, finally leveling the surface.

If reinforcement is necessary, then the mesh is not located end-to-end, but with an overlap of at least 10 centimeters.

In order to use the grid correctly, you need to be able to choose it, and for this it is important to know how the main options for repair grids differ.

putty mesh- a material similar to fabric, in which the cell is only 2 by 2 mm, and the density is 60 g per m2. If a mesh with a cell of 5 by 5 mm is taken for work, then surfaces can be reinforced using a coarser solution. This mesh can be used both indoors and outdoors.
Serpyanka in structure it has the same appearance as the 2x2 putty mesh, but differs in size, because it is made in the form of a strip. This strip is small in thickness, and the length can vary from 12 m or more. An important feature of such a coating is that one side has an adhesive base, which can reinforce cracks on the walls.
Gossamer mesh- a material that is not similar to a fabric, but obtained as a result of a press of a large number of fibers. In a professional environment, it is called fiberglass. You can buy it in the form of a roll, the width of which can be different. The minimum is 2 cm, and the maximum is 2 meters.

Plaster on the grid - effective method rough wall finishes. A particular advantage of this method is that it can be used to apply a thick layer of mortar, which will not slip and peel 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 plaster may begin to flake and crumble even after repairs have been completed. This is usually due to insufficient adhesion of the materials indicated above. The grid allows you to form 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 optimal size cells 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.

Fix fiberglass mesh on the wall it is possible with only one plaster solution, in case of difficulties, 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 step. 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. ready mix throw 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. Final procedure - final alignment frozen surface. To do this, prepare a liquid solution and, applying it to the wall, rub it in a circular motion with a trowel.

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