Reinforcement of plaster with metal mesh stb. Reinforcing mesh for plaster: how to apply. Mesh fastening according to technology

19.04.2014 17:30

In the last few decades, we have such a definition as a renovation of an apartment. This means that there are certain European standards recommended for implementation in the process of performing European-quality repairs. One of these standards is reinforced wall plaster, that is, plastering surfaces using a reinforcing mesh.

Many believe that plaster reinforcement is used to increase adhesion (cohesion) of surfaces and protect them from cracks. This is true, but only in part. To increase and improve adhesion, special compositions are used, with the help of which a primer is made. Reinforcement of plaster is mainly done to hold the plaster layer together, which prevents it from cracking.

The reinforcing mesh can be metal, plastic and fiberglass. The stucco reinforcing metal mesh has large cells with a diameter of more than 4 mm. A metal reinforcing mesh is used when leveling walls with a large amplitude of curvature, when differences in some cases can reach up to 4-5 cm. To plaster such curved walls, plaster is applied in a thick layer, which, after drying, often swells and moves away from the surface. Reinforcement avoids this.

Plastic mesh is less durable and may be susceptible to chemical attack cement-sand plaster. The plastic reinforcing mesh has cells of 2-3 mm, mainly used under gypsum plaster when applying a thin layer. Its use is advisable when applying a layer of less than 20 mm, when finishing more or less even walls.

Typically, a layer of gypsum plaster does not exceed 15 mm and is applied in one layer. Reinforcement of plaster on walls is often done not with a continuous coating, but partially and only in problem areas. However, when performing plastering of ceilings and walls in new buildings, which are still shrinking, reinforcement is done over the entire surface. The painting plastic reinforcing mesh on the walls and ceiling of the new building protects the plaster walls and ceilings from cracks.

According to the observations of European manufacturers of gypsum plaster mixture, the use of a reinforcing layer on the walls of new apartments subject to deformation, the risk of cracking along the thickness of the entire plaster layer is significantly reduced. Let's consider a specific example. After the brick new building was put into operation, it carried out draft work. Walls and ceiling were plastered gypsum mixture for construction cement-sand plaster. A painting grid was used, in some places even in two layers. Within three years, small cracks appeared in the upper putty layer on the surface of the ceilings and on the walls in several places. Such cracks can be easily repaired.

Facade finishing is one of the most important construction operations. Coating external walls exposed to precipitation, freeze/freeze cycles and harsh ultraviolet rays. Such difficult operating conditions 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 facade walls is carried out 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.

All-metal mesh

The fact is that among the many advantages of foam blocks, it is necessary to pay attention to one very significant disadvantage- 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 grid 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 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 is used 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 the expanded polystyrene is protected from negative impact ultraviolet rays and, oddly enough, bird damage. 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 most reliable method is to 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 in any way. The fact is that even the thinnest layer of glue or other cement-sand mixture does not completely let through ultra-violet 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 or out of ignorance physical properties or the 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 so high will hurt finishing screed on foam. 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 universal use.

Modern facade 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- metal scissors.

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.

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. Finish coat is being 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. Thin layer 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. Quantity will be determined empirically. While applying the layer, hold the spatula at an angle to the foam plates, press with medium force. Achieve a layer thickness of approximately 2-3 millimeters. Don't Prepare Right Away a large number of surface, for beginners, two meters in a dyne is enough. If you do not have time to fix the mesh, the glue will harden, you will have to remove it 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 mesh fixation and has a positive effect on 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 adhesive of the first layer protrudes over the entire surface and evenly covers the mesh cells with 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. We remind you once again that the plastic reinforcing mesh on insulated facades is not used to prevent cracks on the adhesive surface, but to mechanical damage foam. Keep this in mind when making a decision.

Facade mesh for building protection

Compliance with safety precautions during the construction works on high-rise buildings- one of the main requirements for all developers. This is especially true for objects being built within cities. The facade mesh is fixed on scaffolding and prevent falling construction debris and tools on 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?

1. 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.
2. Pull the peeled mesh towards you and cut it around the perimeter with a sharp mounting knife. 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.
3. Cut out a new mesh for the patch, the size should be slightly larger than the freed area for the overlap.
4. Remove a layer of old glue from the surface of the foam.
5. 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.
6. After it dries, smooth it out. Special attention give the place of joining. It should be as even as possible 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. With regard to service life and bearing capacity, then 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 definitely 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 you take into account possible repairs due to mechanical damage to the foam, a slight increase in cost is fully justified.

Video - How to glue reinforcing mesh

Plaster on the grid - effective method rough wall finishes. The particular advantage of this method is that it can thick layer solution, which in the process of finishing will not slip and peel off under own weight. 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.

When applying a thin layer of solution to flat surface usually fiberglass is 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 - durable and flexible material, which is made from a wire of small cross section. Use such a product for both external and for internal works. 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 surface finishes 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.

1. 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.
2. 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.
3. When mounting on a concrete or brick surface, drill holes in the wall and insert plastic dowels into them.
4. The distance between the screws depends on the size of the cells and the thickness of the mesh itself. But in any case, it is desirable that the fastening step be no more than 40-50 cm. At the fixing points, the canvas may come into contact with the wall, and in the intervals between fasteners it should not come into contact with the surface, since in this case the quality of the plaster layer will deteriorate.
5. At the joints, the material is mounted with an overlap of 8-10 cm.
6. 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.

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 old finish(if any) - paints, plasters, etc.
• Next, dust is removed from the surface. If there is fungus and mold on the wall, the affected areas should be cleaned with a 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:

1. Using the building level, set the extreme profile in a strictly vertical position and fasten it with two screws.
2. Next, the lighthouse is fixed with a plaster solution.
3. 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.
4. Then install the remaining beacons, the distance between which should be less than length rules.

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 level 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.

reinforced solutions. Solutions reinforced with fibrous substances are prepared for plastering on a metal mesh. reinforced plaster mortars better fill the cells of the grid and as a result a solid surface is obtained, on which different ways you can apply subsequent layers of the solution. I use woolen and synthetic waste as fibrous substances.

The composition of cement mortars is prepared in a ratio of 1: 3. Cement-lime mortars 1: 0.1: 3 and 1: 0.25: 3. 0.5 ... 1 hour of a reinforcing additive is introduced into the solutions. First mix the additive with dry cement-sand mixture, then the mixture is mixed with water or lime milk, or first mix the additive with lime milk.

Solutions for heat-insulating plasters. Heat-insulating plasters, that is, plasters with low thermal conductivity, are obtained from mortars with light aggregates, for example, perlite sand. The compositions of these solutions and methods of their preparation do not differ from the compositions and methods of solutions with sand filler. It only slightly increases the mixing time.

For plastering dry rooms use a solution of 1 part of cement and 3 parts of sawdust soaked in milk of lime. Sometimes 1 part of natural or slag sand is added to this solution.

For plastering rooms high humidity apply solutions next composition: cement - 1 hour, milk of lime- 0.5 hours, sand 3 ... 4 hours, asbestos - 1 hour.

Solutions for acoustic plasters. In order to reduce noise in the room, you can plaster the walls with acoustic solutions. Light mortars with a density of 600 ... 1200 kg / m 3 help well in this, the filler in which are porous sands with a particle size of 3 ... 5 mm, obtained from slag, pumice, expanded perlite, expanded clay, etc.

Some enterprises produce gypsum-perlite mixtures used for the installation of heat-insulating and acoustic plasters. The composition of such mixtures includes expanded perlite sand, gypsum binder and retarder.

For fire-retardant plasters, mineral wool granules are additionally added to the dry mix.

Plaster materials.

Special plasters.

The consumption of the BS preparation in solutions of brand up to 15 is 2 - 3 kg per m 3 of solution, and in solutions of brand 30 - 1.5 - 2 kg. On average, the BS preparation reduces the consumption of lime to 400 kg or cement to 75 kg per 1 m 3 of solution. Introduced directly into the mortar mixer. It is not produced by the industry, it is prepared in the conditions of a construction site (table 20).

Reinforcing mesh for plaster is now used quite widely. This article will tell you how and why it is necessary to make reinforcement for plaster. Recently, the reinforcement of plaster with a mesh has become popular, among the people it has been called "euro repair".

It has become much easier to finish the surface, apply building materials more carefully and use modern requirement and repair standards. The range of possibilities and materials from building products has also increased and this is by no means the final version of building treatments and repairs. The video in this article shows the entire process of doing this work.

Reinforced plaster mesh is used in this work to improve the quality of the coating. It is commercially available and has two types. Its price is not high and everyone can afford such costs.

But after installing it, you will get quality coating. Especially if the work is done by hand.

So:

• According to the European standard (this is not a prerequisite), the stucco reinforcing mesh is used in especially difficult cases. It is believed that reinforcement will improve the connection with the wall and protect the surface from the formation of cracks and irregularities. But in reality this is not so.
• To improve the adhesion of the plaster, thoroughly clean the wall with a primer. And the mesh will only help reduce the visibility of cracks, and not eliminate them completely. We will return to this issue later.
• There are 2 types of nets: metal and plastic. But there is already a third type - fiberglass mesh (see. Fiberglass plaster mesh - types and scope).
• Metal, in turn, is used for plastering a surface with many defects (such as bumps, protrusions, cracks, which can exceed 5 centimeters in thickness). For such work, it is necessary to use a large amount of plaster, which, after drying, can swell and peel off. This is especially common when plastering with clay without additives.

Attention: In order to avoid the situation indicated above, a reinforcing plaster mesh with a large cell and with a gap width of more than 10 mm is used. This is a standard mesh for this type of plaster. In the case of using a plastic stack, the structure of the mesh can be damaged due to the load and aggressive material that will be applied to it. plastic mesh should only be used under gypsum plaster, which has a small weight.

• It would be reasonable to use a painting plaster reinforcing mesh with a cell width of up to 3 mm when finishing the walls, or plastering walls with a gypsum mixture that are already even and free of defects.
• According to the standards, the thickness of the applied plaster, mixed with the gypsum mixture, should be no more than 15 mm. This will allow the plaster to lay down in one layer without problems.
• When reinforcing the wall, the mesh should be sunk into the freshly applied areas of plaster in depth with a ratio of 2/3 to the entire layer and overlap at least 100 mm (the place where two reinforced mesh- make an overlap of at least 200 mm).
• To reinforce the plaster on the wall, most often it is recommended not to be continuous, but only in the place where there is a conjugation of different finishing surfaces and their elements. If applied plaster layer on the ceiling, or working in a building that has just been built and has not shrunk, it is best to reinforce the entire surface area.

The most important nuance that the master should be guided by when choosing a plaster mesh is to take into account the thickness of the plaster when applying it.

Attention: The lowest points on the ceiling are calculated (a laser or building level is used) in order to estimate the thickness of the future plaster layer. It is from this moment that the volumes of consumable material begin to be calculated.

• After taking measurements for further repairs, one of the options shown below should be used:
• The plaster is not larger than 20 mm and there is no rust at the base of the ceiling and wall - it is allowed to use plaster without a mesh and proceed to the installation of beacons.
• If rustication is used on the surface, then it is best to use a fiberglass plaster mesh in order to protect the surface from future cracks and better bonding between the wall and the plaster.
• If the layer of the applied building material exceeds 30 mm, as mentioned above, a metal reinforcing mesh is used (see Steel plaster mesh - types and applications). Installing such a mesh will protect the surface from flaking when it dries.
• If the ceiling surface is uneven and the level of applied plaster is more than 50 mm, it is recommended to refuse plaster altogether, and use a stretch or suspended ceiling.

Metal mesh mount

Plaster with reinforcing mesh is applied according to certain rules. The reinforcing mesh for plaster is fastened with self-tapping screws; in some cases, dowels can also be used.

So:

• Before you start attaching the mesh under the plaster, the mesh must be cut to required size and measurements of the wall, having processed it with acetone or a solvent.
• They always start from the ceiling, fixing the upper edges along the length with self-tapping screws and reinforcing the fastening with mounting tape.
• If the wall is concrete or brick, we prepare a hole for self-tapping screws in advance and install dowels.
• We fix the panel over the entire surface of the ceiling, placing fasteners in a checkerboard position along a length of 400-500 mm.
• At joints, an intersection should be made with each other by 80-100 mm.

Attention: To speed up the installation of a metal mesh, it is recommended to use a dowel - a nail. They, unlike a conventional dowel, are hammered in with a few blows and do not require additional electrical appliances.

Fixing the fiberglass base

Reinforcing mesh for plaster may well be non-metal.

• If fastening is carried out on a fiberglass mesh, the base should be fixed only at a few points on the ceiling, starting from the edge and stretching the fastening with self-tapping screws along the wall and ceiling.
• Mounting tape is suitable for additional fixation, but it is usually completely useless in these types of work. Self-tapping screws will effectively fix the position, and the plaster is applied without much difficulty. It does not even depend on the thickness of the leveling layers.

Attention: This reinforcing mesh for plaster is sold in rolls. Masters recommend unwinding the roll of canvas and fastening it along the length of the wall, keeping it parallel to the floor.

• Proceed with the installation from the corner and along the upper joint between the wall and the ceiling.
• At the joints, we provide for the imposition of the cloth between them.
• If you use solid mesh panels to level the coating, you can achieve high strength and reliability of the structure, so you should not cut the mesh, but leave big chunks canvases.

Reinforced plaster will allow you to apply a large layer and at the same time it will stay on the surface for a long time. So before starting work, you should study the photo and draw up a plan for the work. The manual will help you in this matter.