During construction, reinforcement is an indispensable material. Reinforcement allows you to strengthen a structure and extend its service life. But why do you need to reinforce walls, and what materials are needed for the work? We'll figure out.
Very often, during the construction or renovation process, you can encounter many wall defects that are quite difficult to disguise or remove completely. You can level the wall using a ball of plaster. But if there are a lot of rough irregularities or cracks on the wall, then the plaster itself will not be able to hide them. In such cases, you can use mesh reinforcement of the walls.
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 the following cases:
- Uneven walls. In the process of leveling the walls, you may encounter very large irregularities, to hide which you will have to apply a large layer of plaster. But the plaster itself is very heavy and if the layer is quite thick, 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. Using mesh reinforcement you can significantly reduce the size large cracks, and if the cracks are smaller, then hide them completely. The mesh also prevents the appearance of cracks and microcracks if used during the construction process.
How to choose the right mesh for wall reinforcement?
There are many nuances that are worth knowing 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). 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 mesh if plastering will be done with clay. Only in this case it is better to take a mesh with a cell size of 50x50 millimeters. It is also good to reinforce walls that are often subject to mechanical load with metal mesh (garage walls, first floor of a building).
Usage plastic mesh This is only possible if the plaster does not contain cement. Often used with gypsum mortar for finishing wall plaster. This mesh is cheaper than metal or fiberglass, but it is not durable either. When working with such a mesh, experience is required, as it quickly sags and deforms.
If the layer of plaster is thinner, then possible use fiberglass mesh. This mesh prevents cracks from opening relatively well, but they are small in size.
Mesh installation
In order to attach the mesh to the wall you will need:
- dowel-nails d=6mm and screws 4.5mm;
- perforator;
- wire for knitting mesh;
- metal cutting scissors:
- beacons.
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 using dowel nails and move to the top.
To fix the mesh, you can bend the edge of the nail or use galvanized mounting tape. The mesh is also often fixed using a knitting wire. To do this, you need to drive the dowels incompletely and tie the wire onto the caps in a Z shape. After fastening the wire, the dowels are finished.
When calculating required quantity dowels, you need to know that about 16-20 pieces will be spent on 1 m².
In order for the mesh not to sag or deform, it must be stretched well and pressed tightly to the wall surface. If there are places where the mesh lags behind the wall by 1 centimeter or more, then the plaster may peel off from the surface. The joints must be overlapped. After fixing the grid, beacons are placed.
Next, you can proceed to the first layer of plaster. It must be made with a liquid solution. The plaster solution must be applied 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 bottom to top.
Facade finishing is one of the most important construction operations. The coating of external walls is exposed to precipitation, cyclic freezing/freezing and exposure to harsh ultraviolet rays. Such difficult conditions operation put forward increased demands on the quality of finishing. Eliminating defects on façade walls is very expensive and time consuming. You will have to install scaffolding, wait for good weather, and remove construction debris. To eliminate the occurrence of unpleasant situations, you need to take all measures to prevent them.
Finishing of facade walls is carried out various materials and technology. Reinforcing stack is used in two cases.
To improve the performance characteristics of the 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, you must definitely pay attention to one very significant drawback - low physical strength. One more problem - concrete blocks They begin to crumble when they freeze/thaw under conditions of high specific humidity. Eventually cement plaster begins to peel off with all the negative consequences.
The reinforcing mesh allows the plaster to adhere to the wall surface. There is talk that such a grid should be used when large thickness plaster, that due to this cracks do not appear on the plaster are only partially confirmed. Firstly, there are simpler and cheaper methods to prevent cracks from appearing in thick plaster. The simplest one is to spread the solution in a thin layer in several stages. Secondly, the adhesion of the mortar to the façade wall can be increased by slightly increasing the amount of cement in the mortar. If this is not enough, then spray it with cement laitance.
To protect façade wall insulation from damage. Reinforcing facade mesh is used during finishing foam insulation boards.
Not to improve the fixation of glue to the surface of polystyrene foam and to prevent cracks, as some “sofa” builders write, but precisely for mechanical protection.
Why do we say this? The surface of expanded polystyrene is protected from negative impact ultraviolet rays and, oddly enough, damage from birds. For some unknown reason, birds are very fond of pecking at polystyrene foam; if you leave it unprotected, many large and small depressions will soon appear on the surface. Conclusion - polystyrene foam needs to be covered. Cheapest and reliable method- use glue.
By the way, the advertising characteristics of manufacturers of plastic reinforcing mesh “they are not afraid of UV” do not in any way affect their actual performance indicators. The fact is that even the thinnest layer of glue or other cement-sand mixture does not miss completely ultra-violet rays. Why should the consumer pay for features that he does not need? And one more nuance. Most often, builders fix the reinforcing mesh on the entire wall. We think this is done or out of ignorance physical properties, or the desire to earn more. We recommend using 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 the foam that high. Mechanical damage occurs due to various impacts, careless maintenance work near the facade wall, etc.
Types of façade reinforcing mesh
Facade reinforcing mesh is made of galvanized wire or polymers. The former are used for facade plaster, and the latter universal use.
| Name | Cell sizes, mm | Roll dimensions, m | a brief description of | Approximate cost, rubles |
|---|---|---|---|---|
| Safety | 2x2 | 1×50 | The material of manufacture is fiberglass, used to reinforce plaster near doors and window openings, for leveling the joints of insulation boards | 900 |
| OXISS | 5x5 | 1×50 | The mesh has enhanced protection against alkalis and can withstand significant dynamic and static forces over a long period of action. | 1050 |
| Fiberglass mesh facade | 5x5 | 1×50 | For holding plaster on concrete facades and insulation boards. Withstands a tensile load of at least 1400 N/cm. | 1400 |
| STREN S5 | 22×35 | 2×25 2×50 | Withstands rough and finishing facade plaster up to 5 cm thick. | 2750 |
| KREPIKS Facade 1300 | 4x4 | 1×50 | Fiberglass, protected from alkalis and ultraviolet radiation. | 1560 |
| KREPIKS Facade 1500 | 5x5 | 1×50 | Reduces the likelihood of cracks due to thermal linear expansion | 1970 |
| KREPIKS Facade 2000 | 4x4 | 1×50 | For reinforcing finishing plasters during finishing of the insulating layer of the facade | 2300 |
| 6×6, Ø 0.6 mm | 1×15 | Increased strength, resistant to precipitation and sunlight | 1110 | |
| 10×10, Ø 0.8 mm | 1×15 | For rough façade plasters 3–5 cm thick | 1330 | |
| 25×25, Ø 1.0 mm | 1×25 | For strengthening facade walls, universal use. Hot galvanizing of wire, minimum thickness coating 20 microns | 1770 | |
| TsPVS mesh | 20×20, Ø 0.5 mm | 1×25 | All-metal expanded metal. It has an increased contact area with the façade plaster solution. | 580 |
Modern facade mesh
Prices for construction reinforcing mesh
Construction reinforcing mesh
Metal mesh fixation technology
Metal mesh is used only for cement-sand facade plasters; foam insulation is not finished with it. The reason is the small thickness of the screed on foam boards. But a metal mesh cannot be aligned with such precision; it must be pressed down with a thick layer of mortar. Metal façade reinforcing mesh can withstand great forces; it is used when it is necessary to apply a thick layer of plaster on an uneven base.
The algorithm for fixing it has several features, the implementation of which guarantees the expected effect. The mesh can be laid in both vertical and horizontal stripes. This does not matter for the strength of the plaster; decide for yourself how it is more convenient for you to work. How to properly fix a metal mesh to a façade wall?
Step 1. Take the dimensions of the wall and cut the metal mesh along them. Select a cutting tool based on 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 this these scissors will have to be sharpened; they will no longer cut paper.
Prices for construction scissors for metal
Step 2. The metal mesh can be fixed with dowels; the length of the hardware should ensure strong fixation. For facade walls made of foam blocks, you can use ordinary nails 80–90 mm long. They are easily hammered into blocks with an ordinary hammer, and 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 Using a hammer drill, 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 required depth - the hole fills up a little 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 mortar. Monitor this parameter over the entire area of the façade wall so that you don’t have to adjust the dowels during plastering.
Step 4. Drill holes along one line at a distance of about fifty centimeters, hang a mesh 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 fastening the reinforcing metal mesh.
Step 5. Check the position of the opposite edge of the grid; if it lies unevenly, then move the grid onto adjacent cells.
Fastening plaster mesh- scheme
Step 6. Everything is fine - continue to fix the mesh, install the dowels in a checkerboard pattern. Most metal mesh is one meter wide; to secure it you will need three rows of hardware.
Important. 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 simultaneously on these dowels.
Step 7 In window and doorways the mesh is cut to size. But there’s nothing wrong if you don’t 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.
When plastering such a façade wall, the mortar must be applied in several stages. For the first time, the mass should be slightly thicker than for final leveling. Specific values depend on several indicators and are determined individually, taking into account practical experience masters The consistency of the solution is influenced by the weather, the ability of facade walls to absorb moisture, the linearity of the wall, the maximum parameters of unevenness, etc.
Step-by-step instructions for fixing plastic mesh
The durability of its operation largely depends on the correct implementation of recommendations for installing plastic reinforcing mesh on foam insulation. In all cases, do not rush, work carefully. We have already mentioned that there is no need to reinforce the entire wall height; it is enough to protect only the lower vulnerable area. But these are our recommendations; if you have doubts, protect the entire surface of the façade wall.
Any brand of glue is suitable for gluing the mesh. Study the instructions, it should have high adhesion to plastic materials. In most cases, a finishing layer of adhesive several millimeters thick is applied over the plastic reinforcing mesh. Finish coating done facade paints or a thin layer of decorative plaster.
Step 1. Inspect the surface of the slabs. If they were fixed with dowels, then completely recess the caps and seal the recesses. You can close the gaps at the same time, but this is not necessary. The fact is that the cracks will automatically close during the application of the first layer.
Step 2. Swipe on the wall horizontal line along the height of the reinforcing layer. It will help you monitor the height of glue application. Thin layer The 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 glue according to the manufacturer's instructions. Always pour water into the container first, and then add the dry mixture. This technology will greatly simplify the mixing process. You can mix it manually with a trowel or using a mixing attachment for an electric drill.
The second method is not only easier, but also more effective. You need to stir for a few minutes, and then leave the mixture to stand for another 5-6 minutes. During this time, the moisture will be evenly distributed throughout the entire volume, and 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 resulting surface is. Professionals work with spatulas up to 70 cm in size; beginners can initially use shorter ones.
Practical advice. If you are just learning how to apply glue to a surface, it is better to immediately get used to working with both hands. If one gets tired, use the other 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 experimentally. 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. Don't prepare right away a large number of surface, for beginners two meters in length is enough. If you don’t have time to fix the mesh, the glue will harden and you’ll 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 mesh, align it horizontally to the length of the prepared section of the wall. Make sure that the mesh lies smoothly without distortions or bends; be guided by a pre-drawn line on the foam.
Practical advice. The mesh should overlap approximately ten centimeters. You may come across recommendations not to apply glue to the overlap of one line, but to do this simultaneously for two rows. We do not recommend doing this, it only complicates the work. Glue the first row of mesh along the entire width at once, including the overlap. The second line will be glued on top of the freshly applied glue. This method simplifies fixation of the mesh and provides positive influence for quality.
Step 7 Use your hand to press the mesh onto the fresh glue in several places and check its position again.
Step 8 Using a spatula, begin to press the mesh onto the surface of the insulation. Carefully ensure that the glue of the first layer protrudes over the entire surface and evenly covers the mesh cells with front side. If there are areas where the adhesive is not thick enough, reapply it over the reinforcing mesh. Such omissions may appear in inexperienced craftsmen. Over time, you will learn to determine by eye the optimal thickness of the glue and there will be no more gaps. Spread excess solution over free surfaces. You shouldn’t try to immediately make the surface perfectly flat, but you need to strive for such a result.
Step 9 Give time for the glue to dry. It is better to leave it overnight; finishing grouting of surfaces is recommended the next day.
That’s all the technology is, the surface of the façade wall is prepared for painting or finishing with other materials. We remind you once again that plastic reinforcing mesh on insulated facades is not used to prevent cracks on the adhesive surface, but to prevent mechanical damage polystyrene foam Keep this in mind when making your decision.
Prices for popular types of putty
Putties
Facade mesh to protect construction sites
Compliance with safety precautions during construction work on multi-storey buildings– one of the main requirements for all developers. This is especially true for facilities built within cities. The façade mesh is fixed to scaffolding and prevents falls construction waste and tools on pedestrian walkways. For such purposes, the cheapest plastic reinforcing mesh is used; after dismantling, it is suitable for direct use.
"Emerald" - a new mesh for scaffolding
Question answer
Is it possible to repair peeled sections with reinforcement? facade mesh? It is possible, but it is better to avoid such situations. Unfortunately, in most cases, peeling appears several months or years after finishing the insulated façade walls.
How is the repair done?
- Inspect the peeled area. Using your hand, check the strength of the mesh fixation next to the detached 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 peeled mesh towards you and use a sharp mounting knife to cut it around the perimeter. Work very carefully, do not damage the foam. If the sect continues to flake off during cutting, great. In this way you remove all problem area, it would have peeled off over time anyway.
- Cut a new mesh for the patch, the size should be slightly larger than the cleared area for the overlap.
- Remove the layer of old glue from the surface of the foam.
- Use a spatula to carefully remove the remaining mesh from the surface. upper layer glue to the width of the new overlap. Apply the first layer of glue, embed the mesh into it and apply the second layer of glue.
- After it dries, level it. Special attention pay attention to the docking area. It should be as smooth as possible without sudden changes in height.
How does the quality of plastic mesh depend on its price? Almost nothing. When choosing a mesh, pay attention to the thickness of the fabric and the size of the mesh cells. All other characteristics are nothing more than advertising gimmicks of the manufacturers.
What is better than a plastic anti-corrosion coating for metal reinforced mesh against galvanizing? Nothing, besides, 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. Regarding the service life and load-bearing capacity, then these indicators are absolutely identical.
Is it possible to do without reinforcing mesh when plastering uneven façade walls? Not only is it possible, but it is necessary. We have already talked about simpler and more effective methods of working with such surfaces. Reinforcement with metal mesh is used not to prevent the appearance of cracks, but to increase the bearing capacity of cement-sand mortars. It is needed when screeding the floor. One more nuance. The indicators of linear thermal expansion of the metal and the solution differ significantly. This means that microcracks will certainly appear in the places where cement and metal mesh meet, because outside temperatures fluctuate within significant limits. IN indoors there are no such fluctuations.
Should I use reinforcing mesh on the basement surfaces of façade walls? Use this technology only for foam-insulated bases. In all other cases it is not needed.
Photo - a cake 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, a slight increase in cost is quite justified.
Video - How to glue reinforcing mesh
A mesh for plastering walls is a product made of metal or polymers that is used to strengthen the surface created by means of a plaster mortar. In most cases it is not required, but for external works or rough alignment For very littered walls, reinforced mesh for plaster is simply necessary.
First of all, you need to decide. If it is less than 2 cm, then reinforcement can be abandoned, since the solution will be able to adhere to the wall on its own. For a layer thickness of 2-3 cm, lightweight products based on fiberglass or polymers are required. They will significantly increase the service life of the finished coating and also prevent it from cracking. For a layer thickness of 3-5 cm, a metal mesh under the plaster is recommended.
On a note! If, after taking all the measurements, it turns out that you need to apply a layer thicker than 5 cm, then it is better to abandon plastering and use drywall for leveling.
According to technology, the layer of plaster cannot be more than 5 cm, but some craftsmen make it even 8 cm, while strengthening each layer with reinforcing fabric.
Regardless of the layer, reinforcing mesh is necessary when finishing lightweight surfaces. cellular concrete(gas and foam blocks).
Types of plaster mesh
The modern construction market offers the following types of plaster mesh:
- Masonry. It is made of plastic, and the cell size is 5 mm. It is suitable for finishing works on brick surfaces indoors and outdoors. This product is destroyed when exposed to alkaline media, so it is not recommended to use it with cement plaster. Another name is painting mesh.
- Universal small. The cell size is 6 mm, and the manufacturing material is polyurethane. This product is perfect for relatively small layers of plaster – 20-25 mm. Such products can only be used for interior finishing work, but they are suitable for any type of mixture.
Universal reinforcing fabric with square cells - Universal medium. All indicators are the same as the previous type. Cells in in this case not square, but rectangular with a size of 14x15 mm.
- Universal large. Rectangular cells with sides 22 and 35 mm. Well suited for decorating surfaces in large spacious rooms, such as warehouses or production workshops. The product can also be used for external work; it tolerates temperature changes and mechanical loads well.
- Fiberglass mesh. These products are made from fiberglass. The cell is square with a side of 5 mm. The product tolerates high, low temperatures, as well as their sudden changes, atmospheric influences. In addition, this material does not react with chemically active substances, so it is considered one of the most best options for working with cement-based mixtures. The mesh is suitable for internal and external work.
Fiberglass plaster mesh - Plurima. It is made from polypropylene. The main advantage is its low weight, making the material easy to work with. The cell is rectangular with sides 5x6 mm. The product does not react with chemically active substances. Can be used outdoors and indoors.
- Armaflex. The reinforcing mesh for plastering walls of this type is made of polypropylene, but it is denser than previous view. The cell is rectangular with sides 12x15 mm. This material is used when a thick layer of plaster is required. Well suited for external work.
Reinforcing product – Armaflex - Syntoflex. Made from polypropylene in two versions. Cell dimensions 12x14 or 22x35 mm. This product is chemically inactive and has a relatively low weight. Can be used during work inside and outside the building, but is more suitable for the former.
- Metal mesh for plaster. It consists of metal rods that are connected by welding at the points of contact. Cell sizes may vary, as well as areas of use. Great for situations where you need to support significant weight.
- Galvanized mesh. The same as the previous type, but additionally protected from corrosion. The size of the cells can be different; it is used for external and interior decoration. This type the most popular in the domestic market.
Galvanized mesh for plaster Choosing a mesh for plaster
Before answering the question: which mesh is better to use, you should pay attention to the layer of plaster that will be applied. Through laser level or hand tools find out the blockage of the wall, add to given value the thickness of the lighthouse and a little margin. The result is required thickness layer.
For small layers, lightweight polymer or fiberglass products are used, for large layers - metal mesh for plastering walls or reinforced polypropylene materials. The larger the layer, the larger the cell should be. If for 2 cm a light mesh with a cell of 5 mm is sufficient, then for 5 cm would be better suited product with a nest size of 3-5 cm.
The thicker the layer of plaster, the larger the cells should be
You should know! If you intend to use cement mortar, then the material must be resistant to alkalis; for gypsum solutions, the mesh can be of any kind.
IN last resort you need to pay attention to the cost. It is not recommended to buy expensive, heavy-duty products just in case; they will never pay for themselves.
The construction market offers a large assortment plaster mesh, but purchasing expensive products is not always justified
This material for plastering walls can be used with a layer thickness of 3 to 30 mm. The cell size should be from 5 mm or more, and the density of the product should range from 110 to 160 g/m2.
The first step is to cut the product into elements. The dimensions of the fragments depend on how many people are working (it’s easier for two people to apply a large part at once), and exactly how the material is positioned (lengthwise and crosswise). It is also important to leave 15 cm of margin to form an overlap with other fragments. After preparing the elements, it is necessary to apply the first layer of solution. A mesh is placed on it and recessed into the surface, after which subsequent plastering is carried out.
Installation of fiberglass material by embedding in a solution
In some cases, craftsmen attach the product directly to the surface to be treated using screws or self-tapping screws, and then plastering is carried out over the mesh. This method can only be used when decorative works and the layer thickness is no more than 1 cm. If the layer is thicker, the network will be too close to the wall itself, so the plaster will remain unstrengthened.
Ideally, the application of reinforcing material under wall plaster should look like this:
- Fragments are cut to the required length.
- The first layer of finishing material is applied and leveled to the dimensions of the mesh.
- A mesh is applied through the heads of the self-tapping screws that were previously screwed in for mounting the lighthouse profiles.
- Next, the next fragment of the wall is processed and so on until the end. In this case, the canvas should overlap.
- After this, the beacons are installed and plaster is applied to the product.
Installation of fiberglass mesh under plaster On a note! The plaster should be evenly distributed over the entire area, and the material should be stretched from the center to the edges. When smoothing the edges of the mesh, it is necessary to hold them with a rule or a wide spatula.
Installation of metal mesh
Plastering metal mesh is used when it is planned to apply a significant layer of material. Craftsmen recommend choosing galvanized products with a cell size of 10-12 mm. This material is easy to cut with special scissors, weighs little, and does not rust.
Reinforcing walls metal products, it is important to remember that they are first degreased, then washed with water and wiped.
Installation of metal reinforcing mesh under plaster Installation instructions:
- First of all, the product is cut with metal scissors into fragments of the required size. It is important to take into account the fact that if there are rusts on the surface, then the mesh is applied in one piece along each of them.
- Install a 6 mm drill bit into the hammer drill and drill holes along the entire wall, retreating from the corners, floor and ceiling by 20 cm, while the pitch of the holes is 30 cm. Their depth is slightly larger than the size of the dowels.
- Mount the dowels into the holes, after which, together with a partner, press the mesh to the surface and secure it with self-tapping screws. To increase the density of contact between the product and the wall, its edges are fixed polyurethane foam. The next canvas should overlap with the installed one. If the material lags behind the surface, you will have to make several additional holes.
- At the end, beacons are mounted on the wall and plastering is carried out.
Installation of beacons on reinforcing fabric If the plaster layer is more than 3 cm, then it is necessary to additionally reinforce the surface. Let's say the first layer of 2 cm with a mesh was applied, after it dries, another mesh is attached to the coating, after which a layer of plaster is applied again, and so on with each additional layer, except for the decorative one.
On a note! If an expanded metal network is used, the layer of plaster depends on its thickness. If the rod thickness is 1 mm or less, a 5 mm plaster coating will be sufficient.
If a large layer of plaster is planned, then it would be rational to apply several layers and reinforce each one 
It is important to remember that the durability of the repair depends on the quality of the materials used. You should not buy cheap products of unknown origin, but buying expensive Western-made products is also not always justified. In this case, it is better to opt for products from domestic enterprises.
The most popular type of wall decoration today is the technology of using various decorative plaster solutions. A special role in it is played by the reinforcing mesh for plastering walls. Its use not only improves aesthetic properties, but also raises the quality of the plastered surface to a new level. high level, preventing the destruction of the decorative layer, the appearance shrinkage cracks and achieving maximum adhesion to the base.
In addition, reinforcing mesh is used not only as key element processing of walls, but also for finishing concrete plinths and foundations. The range of its application expands to strengthening attic and interfloor ceilings. The reinforcing mesh fabric not only protects the plastered surface from mechanical damage, but also from temperature changes and the harmful effects of moisture.
Considering the versatility of the field of application of reinforcing mesh, manufacturers offer a wide range of such construction products, in which you can easily get lost. But knowing the key selection criteria, you can easily buy high-quality rolled material suitable for the required type of work.
Fiberglass Plaster Mesh
This type of mesh fabric is made from polymer fibers High Quality, impregnated with polyacrylic dispersion, providing reliable and durable protection against aggressive influences. Fiberglass roll material has a number of positive qualities:
- High level of mechanical strength;
- Resistance to various types deformations;
- Insensitivity to the influence of acidic and alkaline environments;
- Not susceptible to changes under the influence of temperature changes;
- Flexibility and elasticity;
- A light weight;
- Increased adhesion of the plaster layer to the wall;
- Reinforcement of waterproofing and thermal insulation systems;
- Compliance with fire safety standards;
- Does not require special fasteners. It is simply attached to the mortar and reinforces the putty layer in the middle;
- High level of resistance to the effects of rotting and corrosion processes.
The advantages can also be added to the tape format of the mesh on an adhesive basis, which has greater flexibility and elasticity. It is very convenient for working with cracks and sheet joints.
Thanks to its high quality characteristics, the range of applications for fiberglass plastering mesh is significantly expanded, making it possible to create its variety.
Painting fiberglass mesh
Fiberglass painting mesh sheet is used for interior walls any buildings and structures. Its density is 60 g/m2, cell 2.5x2.5 mm. Painting mesh is used for strengthening when carrying out any internal putty work:
- Finishing ceilings, walls and repairing cracks in them;
- Treatment of door and window jambs;
- Puttying the junctions of walls with windows and doors;
- Used when carrying out waterproofing work;
- Whole plasterboard sheets are puttied.
Fiberglass mesh for facade work
This type of fiberglass mesh is used for any type of external work:
- Repair and restoration of the facade;
- Strengthening the facade when installing insulation systems;
- It is used to create a waterproofing layer during the construction of a foundation or during roofing work;
- Strengthening the anti-vandal properties of the facade.
The density of fiberglass mesh for plastering facades is 160 g/m2 with cell sizes of 5 x 5 mm.
Universal fiberglass reinforcement mesh
The universal mesh roll material absorbs all the stresses created in the putty layer, while reducing the risk of cracks. It has a density of 145 g/m2 and cell dimensions of 4 x 4 mm. It is applicable in most types of putty work:
- Strengthening self-leveling floors;
- Application when carrying out work on insulation of facades;
- Used for any waterproofing work.
Reinforcing plastic mesh
Plastic mesh for plaster has an enviable popularity in construction circles due to its versatility and high quality potential, guaranteeing a wide range of performance characteristics that are almost identical to the positive properties of fiberglass mesh.
However, it is worth noting that not all plastics used in the production of mesh for plastering are resistant to the aggressive effects of an acid-alkaline environment. Over time, they can simply dissolve the plastic skeleton of the plaster layer.
Plastic roll material for plaster has another negative point - it is not recommended to use a layer of more than 8 mm. Under such conditions, the plaster on the mesh will simply lose its reinforcing properties.
Main areas of application:
- Used for reinforcing drywall seams;
- It is used when leveling internal and façade walls;
- Indispensable when carrying out insulation work with polystyrene foam or extruded polystyrene foam. It increases adhesion while maintaining the strength and quality of the insulating layer;
- Effective in strengthening the sand and gravel cushion for the foundation;
- Used in brick laying.
The fairly wide range of uses of plastic mesh fabric gives rise to a wide range of its varieties. At the same time, to carry out interior works When plastering walls, it is preferable to use a mesh with square cells measuring 5 x 5 mm. And for finishing the facade, a mesh with larger cells of 10 x 10 mm is applicable square profile. For foam plastic suitable material, the one that has great rigidity and large cells, for example, square ones with a size of 40 x 40 mm.
Metal reinforcing mesh
Metal mesh is a very popular reinforcing material for finishing surfaces. It can not only strengthen plaster layers, but also be used at various stages of construction. To conduct quality facade works more suitable roll material can not found.
Its use will not only increase the service life and prevent the appearance of cracks on the plastered surface, but also greatly improve the quality and aesthetics of the decorative layer.
Depending on the requirements for future finishing, different types of metal mesh are used, differing not only in the shape and size of the cells, but also in the method of weaving and the thickness of the material used.
Metal roll sectional material may differ in the type of insulating material:
- Galvanized surface;
- Plastic.
The “protected” species is not only resistant to chemical and atmospheric irritants, but also more high cost compared to conventional metal. But by purchasing an insulated reinforcing material, you can rest assured about the durability of the plaster layer, on which terrible rusty spots will not appear in the near future.
Welded metal mesh
Plastering metal welded mesh is especially popular in the construction world not only for perfect combination price and quality, but also for many high-quality performance properties:
- Light weight;
- Ease of processing. You can use metal scissors to cut it;
- The plaster layer reinforced with such a mesh has an increased strength index;
- Possibility of finishing metal surfaces. In this case, it is simply welded to the base, and then a layer of plaster is applied;
- Large selection of cell sizes. From the wide variety, you can purchase mesh even for rare finishing cases. But the most popular is metal mesh 10x10 mm.
Flaws:
- During operation contact welding may fly off over time;
- It is quite difficult to return the mesh to evenness after rolling;
- Welding areas are most susceptible to corrosion, even with a galvanized coating.
Areas of application:
- Relevant for any finishing work. Metal mesh for plaster with large mesh sizes is mainly used for cladding external or industrial walls;
- Used for finishing load-bearing structures;
- Ideal for strengthening foundations;
- The welded mesh type qualitatively reinforces the thermal insulation structure;
- Metal mesh is often used in brickwork;
- This mesh material is made with different insulation.
Metal plaster mesh is a special type of welded rolled material created specifically for plastering walls, providing maximum adhesion and special strength of the applied layer. It is made by welding from wire of various thicknesses, both with and without galvanized coating.
Rabitz
The most famous metal mesh. It is made by weaving wire with a diameter of 1 – 3 mm. In its production, high-alloy, carbon steel, covered protective coating made of zinc or PVC.
| Advantages | Flaws |
| The metal mesh has a weave of wires that are not fastened together. This feature does not create stress when tensioned, reinforcing the applied layer more efficiently, making it more dense and even. | Large mesh weight due to frequent weaving; |
| Withstands sudden temperature changes without succumbing to deformation; | Complexity of installation and the need for frequent fastening to the wall; |
| To obtain a piece of the required size, it is not necessary to cut the sheet, violating the integrity of the galvanized coating. It is enough to “unbraid” one twig and separate the parts. | High cost even without a protective coating. |
| Withstands large layers of plaster. |
Main Application:
- Facade mesh is indispensable when plastering walls built from adobe brick or clay;
- Use for construction various types fences and enclosures.
All-metal expanded metal mesh
Perforation is a unique metal mesh made from a single sheet without welding or weaving. In addition to its absolute integrity, such façade and inner mesh under plaster has a lot of positive performance characteristics:
- If you reinforce the plaster layer with this particular wire, you will give it increased resistance to impacts and other mechanical characteristics;
- Protecting the plaster layer from the appearance of cracks and various deformations;
- Resistance to thermal and chemical influences;
- Not affected by moisture;
- Works great in tandem with any plaster solutions and thermal insulation systems;
- Perfect for finishing various surfaces: wood, plaster, concrete, brick, stone;
- Creates good adhesion;
- Suitable for arranging ceilings and complex textured surfaces;
- Easy to cut;
- Allows you to apply a small layer of plaster mortar.
Just like all materials, perforation has some disadvantages:
- Relatively heavy weight;
- It is manufactured only with a galvanized layer, which increases its cost several times;
- Difficulty in winding into rolls and returning to the original flat position.
Cutting is not only an internal and facade plaster mesh, it can also be used for insulating buildings lined with siding; insulation of pipelines; fastening heat-insulating blocks; boiler surface protection; production of containers and fencing.
The dimensions of the notch are quite varied. It can have cell sizes from 3 mm to 50 mm in width, and a height from 1 mm to 25 mm, while the wall thickness can vary from 0.5 mm to 8 mm.
Criteria for choosing a mesh for plastering walls
As you can see, the range of mesh roll material is quite extensive. To make the right choice, you need to know not only what surface the plaster layer will be applied to, but also under what conditions the reinforcing mesh for plaster will be used:
- If a layer of more than 30 cm is expected, then a metal mesh is used. When applying a plaster surface less than 30 cm thick, plastic or fiberglass mesh is suitable;
- The chain-link is ideal for walls made of materials that undergo changes under temperature influences: polystyrene concrete and wood;
- For foam concrete walls, plastic mesh is more beneficial;
- If planned textured plaster facade on a mesh, then fiberglass rolled material is most suitable for these purposes;
- Welded metal mesh is indispensable for working on walls subject to heavy settlement.
Any type of mesh for plastering walls is perfect for independent use. The selected video material will tell you about the intricacies of selection and installation.
Plaster on mesh – effective method rough wall finishing. A particular advantage of this method is that it allows you to apply a thick layer of mortar, which during the finishing process will not slide or peel off under its own weight. What is the procedure itself, what types of mesh should be used in certain cases, and how to attach them? More on this later.
When plastering walls without using a reinforcing layer, there is a high risk that the applied solution will simply fall off the base. And when finishing brick and wooden surfaces the plaster may begin to peel and crumble even after repairs have been made. This usually occurs due to insufficient adhesion of the materials indicated above. The mesh allows you to form monolithic slab, which is not afraid of any loads. Different meshes are designed for a specific load, and the type of material used depends on the thickness of the plaster layer.
On a note! With the help of reinforcement it is created durable coating, which will not crack during long-term use. Even if the solution preparation technology is violated, the mesh will ensure the integrity of the plaster layer.
Types of grids
There are several types of products used for reinforcement, the main ones being the following materials:
- fiberglass;
- metal.
Types of reinforcing mesh: a – metal; b – fiberglass When applying a thin layer of mortar to a flat surface, fiberglass sheeting is usually used. For finishing curved walls, when the thickness of the plaster is more than 2 centimeters, only a metal product is suitable.
In turn, metal mesh also comes in several types:
- woven – durable and flexible material, which is made from small cross-section wire. This product is used for both external and internal work. When choosing woven fabric for reinforcement, it should be taken into account that optimal size the cells in this case are 1x1 cm;
- wicker - also known as chain-link mesh. Best suited for finishing surfaces with large area. The most common cell size is 2x2 cm;
- welded - made from wire using spot welding. The rods located perpendicular to each other form square cells, the optimal size of which for reinforcement is 2-3 cm. Welded products are most often used for finishing buildings subject to severe shrinkage;
- expanded metal- made from sheet metal by forming diamond-shaped cells on a special machine. Such material is usually installed in cases where a small solution consumption is expected per 1 m2.
How to attach metal mesh?
To work with a metal mesh you will need self-tapping screws, construction dowels and metal mounting tape.
- Before installing the canvas, it is necessary to cut off the required piece, having previously measured the area on which the plaster will be applied in the future. For cutting thin material Metal scissors will be enough. If the product is made of wire with a diameter of 2 mm or more, you will need a grinder. The cut fabric must be degreased by wiping it with a rag moistened with a solvent.
- Attaching the mesh under the plaster should begin from the ceiling. The top of the material is secured along its entire length with self-tapping screws, under the heads of which cut pieces of mounting tape are placed. Wide washers can also be used as spacers, but they are much more expensive than tape.
- When installing on a concrete or brick surface, you need to 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. In places of fixation, the canvas may come into contact with the wall, and in the spaces between fasteners it should not contact the surface, since in this case the quality of the plaster layer will deteriorate.
- At the joints, the material is installed with an overlap of 8-10 cm.
- A properly secured fabric should be well tensioned. If the material does not vibrate in places where there are no fasteners, then everything is in order. Otherwise, voids may form under the mesh, which will negatively affect the quality of the finish.
Installation of fiberglass sheeting
In this case, the plaster mesh is attached to the wall by fixing the material only along the perimeter of the canvas. First, using self-tapping screws, secure the upper edge of the mesh in several places, and then all other sides. Additional fasteners are usually not used, since later, when applying the solution, the mesh is securely fixed in the thickness of the plaster.
It is possible to fix the fiberglass mesh on the wall with just a plaster solution; if difficulties arise, you can use self-tapping screws Since the mesh is initially rolled into rolls, for ease of installation it is better to unwind and fasten the material along the walls, parallel to the floor. You need to start fastening from the top, from any corner of the room. The joints are overlapped with an overlap of 15-20 cm.
You should know! It is best to cut the material so that you can stretch the whole fabric. This will ensure higher strength of the plaster layer.
Preparing the wall for plaster and installing beacons
Even when using a mesh, the surface requires preliminary preparation:
- First of all, the wall is freed from 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 wire brush.
- After this, the surface is treated with a primer, which improves the quality of adhesion, strengthens the base and prevents the formation of mold and corrosion.
After preparing the base and installing the reinforcing sheet, it is necessary to help form a smooth surface during the plastering process. A special profile is used as beacons.
Installation is as follows:
- Using building level, set the outer profile in a strictly vertical position and secure it with two self-tapping screws.
- Next, the lighthouse is fixed using gypsum mortar.
- The next step is to install a beacon on the other edge of the wall. To mount all profiles in the same plane, a thread is pulled between the outer guides.
- Then the remaining beacons are installed, the distance between which should be less than the length of the rule.
Plastering the surface
After installing the beacons, you can proceed to the plastering process. Plastering walls on a grid is carried out in several stages, at each of which one layer of mortar is applied.
First stage. Plastering is usually carried out in 2 or 3 layers, depending on the material of the walls. The initial layer is applied by “spraying”. To do this, prepare a solution whose consistency should resemble sour cream. Ready mixture throw on with a trowel or ladle in any order. The solution can be spread, but the first option is easier and faster. The applied mixture is leveled with a spatula. The thickness of the “spray” layer should be about 10 mm.
Second phase. After the first layer has completely dried, a thicker mixture of dough-like consistency is kneaded. The solution applied using a trowel is leveled with a rule, which is pressed against the beacons and pulled from the bottom up. This layer should completely cover the reinforcing mesh. After the solution has set, the profiles are pulled out and the remaining furrows are sealed.
Third stage. Final procedure – final alignment frozen surface. For this they prepare liquid solution and, applying it to the wall, rub it in a circular motion using a grater.
The above plastering technology is suitable for finishing any surface, regardless of what kind of reinforcing mesh is used.