How to glue foam plastic to a brick wall. What is the best way to glue foam? What to do with door and window slopes

Foam insulation in the form of slabs has been used for many years. They are distinguished by their rigidity, the required density, durability, and are completely unaffected by moisture. But installation requires the use of a special glue, although many experts say that you can also use regular tile adhesive. Today the market offers various options adhesive masses The simplest is dry glue, which can be any brand. It is applied in a continuous layer, in stripes or individual equal sections. But you can use another option, which comes in small cylinders. It is applied using a gun; it is enough to make a few stripes so that the plate is securely attached to the surface.

If we compare 60 mm thick foam with other materials, we can draw the following conclusions:

1. The thickness of a foam board of 60 mm corresponds to 110 mm of the usual thickness mineral wool. There is a saving of space and cost of almost 2 times.
2. The same thickness corresponds to 500 mm of dry foam concrete, which is sometimes recommended as insulation.
3. Correspondence wood panels 195 mm at 60 mm foam is often completely unfavorable to the first material, despite its environmental friendliness.
4. A 60mm foam board corresponds to 850mm thickness brickwork. Brick can hardly be called effective and economical precisely from the point of view of the thickness of the resulting heat-insulating layer.
5. Concrete and foam with a thickness of 60 mm show the largest discrepancy. To ensure such properties, it is necessary to make a concrete wall 2132 mm thick. This is too expensive and completely unprofitable when you can get by with cheap and high-quality foam.

To glue foam plastic, you must immediately prepare all the tools and materials that may be needed during installation:

Tools for laying foam: polystyrene foam, diffusion membrane, timber, hammer, saw, axe, nails and stapler, mesh, material for finishing cladding walls

1. Styrofoam required thickness and density in the calculated quantity. Determined by the area of ​​the surface to be sewn, taking into account 10% for cutting.
2. Drill and special attachment for construction mixer so that you can quickly and efficiently mix the mixtures and glue.
3. Spatula-comb for applying glue to dry cement based.
4. A small narrow spatula that is used to remove excess adhesive mass. Why is this being done? The protruding mass, after hardening, forms lumps, which negatively affect the quality of thermal insulation.
5. A wide metal spatula, which is needed to level the surface.
6. A primer required to prepare the surface before gluing foam.
7. Hammer with 10 mm drill. It is required to make holes for additional fasteners using plastic mushrooms (or umbrellas, as they are often called). Dowels are used as auxiliary fasteners foam boards, they provide excellent fastening quality and are in demand mainly for outdoor work.
8. A plastic container for preparing the solution if dry-based glue is used.
9. Wide, comfortable primer brush.
10. A knife or other tool that will be used to cut slabs.
11. Hammer for driving in dowels.
12. Dowels for foam plastic are of a special shape, reminiscent of an umbrella or a fungus; these are the names they usually appear under.

The question of what glue to use must be decided in advance so as not to purchase unnecessary materials and tools. For example, for aerosol glue a bucket is not required; here you need a special mounting gun into which a container with the mixture is inserted.

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How to glue foam?

Gluing foam plastic is not so difficult, just follow simple rules. First you need to inspect the surface and clean it. After this, it is recommended to apply a layer of primer, if possible, and let it dry. The glue is applied to the material in full accordance with the requirements. The pre-dry mixture is mixed with water in the proportion specified by the manufacturer. If this particular mixture is used, then the solution can be applied using the dot method, but the number of dots cannot be less than 5. One is applied in the center and one at a time in the corners of the slab.

If spray adhesive is used, it can be applied in strips. One is enough along the edges and diagonally. The drying time for the glue also varies; in the latter case, it only takes about 30 minutes before further finishing work can begin.

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Types of glue for foam plastic

How to glue foam plastic? Usually specialists do not present too much high requirements, any composition is well suited even for tiles. This glue is evenly and easily distributed over the entire surface of the slab and has an excellent level of adhesion to the surface. It must be remembered that after gluing the foam plastic is additionally secured with dowels, the fixation is strong and reliable.

What kind of glue is best to use for such material as foam boards? As already indicated, you can use almost any composition that has the necessary properties and is easy to apply. Silicone sealant, which is usually used for absolutely any work, is also suitable.

You can buy glue for facade works, a universal construction adhesive for installation work, which is also well known as liquid nails.

When using glue, certain factors must be taken into account. This is not only the quality and type of insulated surface, but also the operating conditions of the slab and the requirements for the material. Today, all mixtures that can be used for similar works, can be divided into 2 large groups.

Dry mixes. This is the most economical option, which consists of purchasing a special dry mixture, which, when prepared, is diluted with ordinary water. Such compositions have a cement base and are intended for use with insulation materials such as foam plastic and other rigid slab materials. After the adhesive is applied to the surface, it is cemented, creating a very rigid base with excellent strength characteristics. Such mixtures themselves are distinguished by their reliability, durability, the highest level adhesion.

Before using glue, the surface must be cleaned of dust and debris; it must be perfectly clean, otherwise the quality of gluing will be worse. There shouldn't be any traces old plaster or paint, it is important to apply a primer to the surface to be treated before work. It is very easy to glue foam together with glue. To do this, the sheet is turned over with the wrong side, the mixture is applied in a continuous layer, on individual points or in the form of stripes. If you use spot application, then the number of areas should be from 5. They are applied not only along the perimeter of the sheet, but also over its entire area.

Aerosol types of glue are used less frequently, although their application is much easier and faster. One of the most popular is polyurethane aerosol adhesive, which is used not only for internal, but also for external works. This glue in just one can allows you to glue up to 10 m² of foam plastic boards. The mixture hardens quite quickly, usually it only takes half an hour, after which you can proceed to further actions.

Working with polyurethane glue is simple. The cylinder is inserted into the required position into the mounting gun, after which the mixture is squeezed out from the edge at a distance of 2-4 cm. Stripes are applied diagonally to the slab. After this, the foam is pressed firmly against the surface, although the force should not be great. This glue compares favorably with standard cement-based glue, since its consumption is much less, it is more economical, although the price per bottle exceeds the price of a bag. The quality completely outweighs this minus.

Thus, foam plastic is a material that is often used in construction. This is one of the best heat insulators that retains its shape and properties even under the most unfavorable conditions operation. But to mount it on a surface, you need to use special glue.

Consumption depends on the type of glue; the mixture is applied to the surface in the form of stripes, dots or a continuous layer. Additionally, after gluing, the sheet must be reinforced with dowels.

The second name for polystyrene foam is expanded polystyrene. This soft material, which consists of plastic air mass. Its structure is cellular and has White color. The cells are reliably separated from each other, so the material has good thermal insulation properties.

Foam Features:

Kinds:

1. Polystyrene. It consists of white granules, which are obtained by heat treatment of polystyrene. A gasifier is used during this treatment. The size of the granules ranges from 7 to 17 mm. The structure of the granules consists of closed cells that are 98% filled with gas.
2. Polyurethane. This material is obtained by combining diisocyanates and polyesters. These substances are connected using pressure. The structure is not the same - the cells have different shapes and sizes. The cells are very closely adjacent to each other and due to this the density of the material is very high. This type of foam has high strength and durability.
3. Polyethylene. This material is flexible and elastic. Polyethylene has a small thickness - only 5 cm. This type of foam is used for packaging products.

Application area

Polystyrene foam is used in various fields life activity. It is made from a large number of materials and products. The material also retains heat well, so it is often used to insulate walls.

Areas of application of expanded polystyrene:

1. Construction works. In construction, it is used for thermal insulation of structures, houses, buildings, garages, hangars. It is also used for external insulation.
2. In shipbuilding. Lifebelts, lifeboats, and light boats are made from it. Also used to fill the compartments of small boats.
3. In medicine. In this area, foam containers are used to transport organs and medicines.
4. In furniture production. It is added to the composition of the material from which it is then made. various items furniture.
5. For the production of packaging materials. Added to various bags, packaging, wrappers, and so on.
6. For the production of outdoor advertising. It is added to advertising structures - banners, signs.
7. In clothing production. It is added to many fabrics. Clothes containing foam are very warm.

Advantages and disadvantages

Advantages of polystyrene foam:

1. Natural and environmentally friendly material. Expanded polystyrene does not emit toxic and harmful substances, therefore it is safe for the human body;
2. Long service life. The structure is not susceptible to mold, fungi, moisture and various microorganisms.
3. It resists fire well and can withstand high temperatures. The spontaneous combustion temperature is +491 degrees and this is 2 times higher compared to wood and 2.2 times higher than paper. It also does not support combustion well; if the source of ignition is removed in time, it goes out immediately.
4. Little weight. Thanks to its light weight, it is easy to install and does not place additional load on the base.
5. Inertia. Does not interact with other materials. Resists well against various influences chemical substances. Therefore, it can be immersed in soapy water. It also does not interact with bleaches and acids, except nitric and acetic.
6. Low cost. This material is very cheap and can be purchased at any hardware store.

Disadvantages of polystyrene foam:

1. Easily damaged and broken. Therefore, it needs additional protection.
2. It is quickly destroyed under the influence of nitro enamels and solvents. For this reason, it cannot be painted.
3. Does not allow air to pass through. Therefore, rooms insulated with polystyrene foam must be frequently ventilated.
4. Very often, foam plastic is damaged by rodents, gnaw holes in it and make their nests.

How to glue foam to foam

Polystyrene foam is glued together using various mixtures and adhesives. During gluing, it is important to consider the type of material and its structure. When choosing mixtures for gluing this material, you should pay attention to their properties and composition. You should also take into account the composition of the adhesive; for this material you should choose products that do not contain various solvents.

Types of glue:

1. Adhesive for foam plastic. This type of glue is cheap and easy to use. The glue has good bonding properties. Currently, there are many brands of this glue.
2. Facade glue. This adhesive is designed for gluing foam to foam, to concrete, to plastic, to wood, to metal, and so on. The shelf life of this glue is average, about six months from the release date.
3. Polyurethane foam. Foam has a very good properties and sticks polyurethane well. With the help of foam, the material will stick firmly and forever. It is worth considering that during gluing the foam dries quickly, and this can lead to unpleasant consequences. The tube through which the foam is squeezed out may become clogged, so it is best to clean it with a special solvent.
4. Polyurethane glue. This glue has good bonding properties. The only drawback is that it is sold in the form of cylinders and you need to buy a special gun for it.
5. Liquid Nails. Liquid nails glue this material very well, but are not always reliable. Therefore, you need to use simple glue with this mixture. Approximately 50-70% of the surface is treated with glue, and the rest with liquid nails.
6. Dry mixes. The mixtures are very cheap and have good properties. The mixtures are diluted with water. Before purchasing this product, be sure to pay attention to the packaging; it should be marked that it is suitable for polystyrene foam.
7. This glue comes in the form of aerosol cans, making them easy to work with. The glue just needs to be sprayed onto the surface of the material. Hardens within 30 minutes. However, one cylinder is designed for only 10 square meters.

Glue cost

The cost of adhesive mixtures varies, the price depends on the properties of the mixtures - the hardening time, the level of bonding, and the method of application.

Average cost of some mixtures:

Polyurethane foam Ceresit– the cost of 750 ml is 650 rubles.

Tytan polyurethane adhesive– the average price of 750 ml is 400 rubles.

Facade adhesive T-AVANGARD-K– this glue is sold in 25 kg bags, the cost of the package is 280 rubles.

Dry mix Ceresit– the cost of a 25 kg package ranges from 400 to 600 rubles.

Liquid Nails– price 300 ml about 200 rubles.

Dry glue moment– the cost of a 25 kg bag is 300 rubles.

– the average price of 500 ml is 900-1200 rubles.

How to prepare the surface

Before gluing the material, you need to thoroughly prepare the surface for gluing. It is on this that further fastening and the duration of fixation will depend.

Surface preparation consists of the following steps:

1. Cleaning from dirt, dust and various substances.
2. Leveling the surface. If there are unevenness or defects on the surface, they must be removed special tools. If there are defects, the bond will be low;

How to glue correctly

The foam is very fragile, so it must be glued very carefully.

To glue it together, it is advisable to use mixtures that are designed for this material. Gluing is performed according to the following scheme:

1. You need to apply glue to the sheet. It is applied in stripes or dots in the four corners. The glue should cover the entire surface. It is advisable that no extra spaces are created during gluing. If the foam is glued with polyurethane foam, you need to take into account that when it dries, the foam expands and spaces may form between the sheets. Therefore, during gluing with this product, a reinforcing mesh is inserted between the sheets.
2. The sheets need to be pressed together. In order for the glue to set well, pressure should be created on the sheets. For pressure, it is advisable to use a small load or simply squeeze with your hands and hold for a while, 15 minutes will be enough.

Conclusion

Polystyrene foam is a material that has a number of advantages - warm, plastic, fire-resistant, non-toxic. Thanks to this, it can be used in various spheres of life. It is very easy to glue and almost all adhesive mixtures are suitable for it. In addition, it is very lightweight and does not cause much difficulty during operation and installation.

Extruded polystyrene foam (hereinafter referred to as EPS) is made by mixing granulated polystyrene with a chemical reagent containing CO 2 and light freons. The composition is heated and passes through the extruder under pressure. Upon exiting it, molding and cooling, a finished sheet of material is obtained with thermal conductivity indicators of 0.03 W/(m*deg).

For comparison:

• polystyrene foam - 0.04,
• foam glass - 0.1,
• concrete on gravel - 1.5,
• lightweight concrete - 0.6,
• brickwork 0.7.

This is possible thanks to 90% of the air enclosed in dense closed cells of the product.

Characteristics of extruded polystyrene foam

Extruded polystyrene has excellent qualities:

• High strength (withstands loads up to 35 t/m2),
• Resistance to aggressive environmental factors
• Waterproof,
• Durability - (operation up to 50 years),
• Low vapor permeability, zero capillarity
• Environmental friendliness (storage containers are made from polystyrene foam, disposable tableware and even toys)
• Does not support combustion without a flame source and high temperature

Extruded polystyrene foam is produced in different densities. New on the market - EPPS increased rigidity- . It contains graphite particles in its structure, which gives it the ability to withstand loads of up to 50 t/m2. You can buy extruded polystyrene foam in Kyiv of this type from TM Technonikol, Penoplex and other manufacturers.

Polystyrene gluing technology

For gluing different brands For EPPS boards, bitumen mastics or cement-based adhesives or polyurethane foam can be used. The glue base should not include gasoline, ethers, acetone and other organic compounds - they damage it, literally dissolving it and leaving holes in the areas of application. In addition, the choice depends on what exactly is to be insulated: the floor of the building, its walls or ceiling.

In new low-rise buildings, it is recommended to design hollow walls and lay EPS boards inside them - there will be savings on adhesive and reinforcing elements. Work on installing thermal insulation with extruded polystyrene foam should be carried out in dry weather at temperatures environment not lower than +5 °C. The only exception is polyurethane foam.

In the case of insulating the walls or floor of a building, the best choice would be. It is used simultaneously for gluing and reinforcement. Gluing of EPS boards begins from the bottom, laying them in 1 row. Next, they are fastened with a T-shaped seam dressing, close to each other and to the slabs of the adjacent row. It is unacceptable to re-install or change the position of the plate after 5 minutes after installation. Eps boards are fixed with dowels. For use in brick or concrete walls take a dowel with a spacer of 60 mm, for walls made of cellular concrete and perforated brick - 90 mm. Quantity per sheet: 4-6 pcs., in the corners of the building up to 8 pcs. The reinforcing mesh is fixed tightly over the applied layer of glue; an overlap of 10 cm is made at the joints of the mesh pieces. After the first layer has hardened, the second is applied. The total thickness of the reinforcement must be at least 3 mm. Corner areas are protected from damage by aluminum corners. The final plaster layer is applied 3 days after reinforcement.

Adhesives used

The basis bitumen mastic- standardized bitumen, plasticizers and solvents. When applied continuously, it is a good waterproofing agent and is resistant to freezing. In the case of work on insulating the foundation of a building, this is objective the best choice adhesive material. But the gluing surface requires drying, leveling and sanding. It is also not allowed to have protruding parts, lumps of dirt, rust, wet or greasy stains. Preliminary priming improves the quality of work. The setting period for adhesive bitumen mastic is at least 30 minutes, so supports will be required. Used as a reinforcing layer cement-adhesive compositions.

You can also glue EPS boards using polyurethane foam, which is applied mounting gun. It has no secondary expansion, a setting period of about 10 minutes, and can be used at low (down to -10 0 C) temperatures. 1 cylinder replaces one twenty-five kilogram bag of glue. Foam is applied thin layer, retreating 2 cm from each edge of the EPS slab and crosswise along the diagonals. The disadvantage of glue is its flammability and toxicity.

The main arguments for and against each type of gluing extruded polystyrene foam boards will allow you to choose the most suitable one for yourself. suitable option. The main thing is that in any case, there will be a reduction in energy costs at the insulated facility, and accordingly, the figures in the energy bill will decrease.

Extruded polystyrene foam (extruded), or EPS, is a popular material for insulating floors, walls, foundations, and roofs. During use, it does not produce harmful fumes, but protects from noise, dust, and cold. Material used for interior works and outside buildings, it can be glued to surfaces using special means. Choosing glue for polystyrene foam is not easy, because the choice is very large.

Features of installation of polystyrene foam

Extruded EPS is a high-density foam material. It is this indicator that distinguishes it from ordinary polystyrene - polystyrene foam. Density increases during the production process when passing through the extruder, this seriously increases thermal insulation characteristics material. The final slabs consist of polymer and small air bubbles.

Due to the smoothness of EPS boards, they have very weak adhesion to adhesive composition. This is the main problem when gluing. It can be solved by selecting special adhesives that themselves have high adhesion to any surface. Also, some products can partially dissolve the foam top of the slabs by being absorbed into them.

Installation specifics polystyrene foam boards is this:

• if the material was purchased as floor insulation, it is laid on an expanded clay pad or on a pad made of other low-density material and filled with concrete;
• to insulate the foundation, the slab must be glued to the concrete of the base and secured with mounting fasteners;
• material is laid on the roof, then a layer of bitumen is placed or PPS is laid between the ribs of the rafters inside the roof layers;
• when insulating the ceiling in an apartment on top floor lay polystyrene foam on the attic side with glue, then concrete it or fill it with crumbs, gravel, expanded clay.

Selecting adhesive for extruded polystyrene foam

How to glue polystyrene foam? Can be used to fasten slabs different means having different components. But there are specifics to using mixtures. So, for gluing to concrete base it is better to use one, for fastening to a brick wall - others, for winter work– third. There are adhesives that combine the properties of fastening material and insulation and have low thermal conductivity.

Before purchasing, it is important to clarify that the product contains no substances that corrode polystyrene foam. This:

• acetone;
• alcohol substitutes;
• toluene;
• esters;
• other solvents.

The ideal option is to purchase specialized compounds, because their manufacturers have already taken everything into account important points. There are three main types of products that are suitable for gluing material. This is a plaster-adhesive mixture of different brands, polymer adhesives and bitumen glue (mastic).

People often use “liquid nails” in a container to glue the material, silicone sealants, frost-resistant tile adhesives, products for drywall, tiles. Can I use them? Experts say that the use of such adhesives is possible, especially if additional fastening of the structure with dowels is planned. But the cost of the work can be much higher, so it is better to buy products designed for XPS.

Plaster and adhesive mixtures

Such mixtures are suitable for gluing EPS to plasterboard, brick, concrete, and cinder block bases. You need to breed them yourself, since they are sold in the form of dry mass. The composition includes mineral components, plasticizers, Portland cement, and a number of auxiliary additives. The mixtures are suitable for exterior work and interior decoration; they will hide all the unevenness of the base. The downside is the need for preliminary deep priming of the surface.

Ceresit CT-83

"Ceresit ST-83" is widely used for pasting building facades. It has excellent frost resistance and adheres well to wood, concrete, plaster, and brick. After drying, ST-83 is breathable. Consumption per 1 sq. m is small, because it is enough to apply the mass 1 cm thick (this is done with a notched trowel).

The company also produces high-quality adhesive Ceresit CT 85, which is considered universal. High strength and ductility are due to the polymers included in the composition. But this product costs an order of magnitude more than the previous one, so builders prefer ST-83. Both materials are applied in intermittent stripes, slightly retreating from the edge for better air release.

Bergauf ISOFIX

Bergauf Isofix glue is a mixture of minerals, fillers, cement, sand, plasticizers, and special additives. Can be used for any indoor and outdoor use. Average consumption – up to 5.5 kg/sq.m. m, a thin layer (3 mm) is required. After dilution, the mixture is viable for 1.5 hours, it is possible to change the position of the plate on the wall within 25 minutes. The glue is sold in 25 kg bags and can glue extruded polystyrene foam to all types of surfaces.

Polyurethane products

Any polyurethane adhesive is seriously different from the dry mixtures described above. They are often called “glue-foam”, “foam-glue”, because the compositions are sold in cylinders, and to use them you need a construction gun. They are used in the same way as polyurethane foam. Polyurethane adhesives for EPS are usually used for exterior applications; they have strong adhesion and are easy to use. The products dry quickly, are economical, do not react to changes in weather, and are frost-resistant.

Tytan Styro 753 GUN

Produced in 750 ml bottles, suitable even for interior work. This polystyrene adhesive is applied in thin strips, then the material is immediately applied to the wall. It can attach EPS to a base made of plaster, concrete, wood, mastic, cement, and is capable of reliably gluing sheets of expanded polystyrene together.

Adhesive foam "TechnoNIKOL"

TechnoNIKOL adhesive is widely used for fastening polystyrene slabs to foundations, walls of houses, roofs, in basements, and on floors. The gaps between the insulation boards are also sealed with glue. The adhesion of the product is high even where there is mold, high humidity, fungus.

Glue "Penoplex" Fastfix

The product is considered effective for fastening EPS slabs to bases made of concrete, aerated concrete, brick, and ceramic blocks. Packaged in standard 750 ml bottles. It is characterized by high strength, the quality of adhesion to the base is one of the best among analogues. The adhesive is incompatible with bitumen compositions, plastic film, Teflon.

Bitumen adhesive Bitumast

Bitumast mastic is similar in properties to a plaster-adhesive mixture, but includes bitumen, which plays a binding role. The advantage of the glue is its excellent compatibility with extruded polystyrene foam; it adheres to the material for a long time without any complaints. The product also has waterproofing qualities, protects the joints of external walls from moisture.

You can easily mix Bitumast, it takes a couple of minutes, you don’t need any special tools (you don’t even need a mixer). There is also no need to warm up Bitumast before use. The consistency is liquid, so apply in a thin layer. There is a significant disadvantage - the mastic sets slowly, and you will have to keep the EPP sheets from slipping for a long time.

Polyvinyl acetate adhesives

Polyvinyl acetate is a transparent, elastic polymer produced by the polymerization of vinyl acetate. This glue is considered universal because it can bond any hydrophilic materials. These adhesives do not rot and prevent the appearance of fungus.

"Moment Joiner"

Universal polyvinyl acetate adhesive, widely used in repair work. It is packaged in containers of 0.1-30 kg, so you can easily select the required weight. “Moment Joiner” dries quickly, does not corrode surfaces, and holds expanded polystyrene sheets very reliably.

PVA-MB

Do not confuse the product with regular PVA glue. This material is a reliable polyvinyl acetate emulsion with a number of plasticizing additives in its composition. PVA-MB dries more slowly than Moment, but the seam is considered stronger. You should not buy glues that are too cheap; PVA is often counterfeited.

Other gluing methods

Some craftsmen try to use “homemade” methods for attaching polystyrene boards using other methods. This is not always reasonable.

Polyurethane foam

Foam is used to fasten any surface, including EPS. The cost of foam is often cheaper than similar glue in cans. But the disadvantages of this method are obvious:

• slow setting with the base - slabs lying vertically will constantly slide;
• the glue contains special adhesion-improving additives, which makes it more reliable for tearing than foam;
• polyurethane foam tends to grow in volume, and when constructing polystyrene foam this can play a bad role;
• foam peels off the wall faster than glue.

The advantage of foam is the ability to fill the seams between the slabs, so it can also be useful in installation.

Hot melt adhesive

Thermoplastic adhesives include special substances based on polyamide, ethylene vinyl acetate, which become liquid when heated. As they cool, they harden. Such products are suitable for working with extruded polystyrene foam, but their cost per 1 kg can be up to 1,500 rubles. The price of the work, therefore, will not be the lowest. It is more expedient to buy suitable specialized glue and carry out repairs economically, efficiently and reliably.

Extruded polystyrene foam, unlike molded polystyrene foam, has a homogeneous structure and smooth surface. Therefore, gluing it together or mounting it to walls causes certain problems due to low adhesion. To solve this problem, manufacturers of construction chemicals have come up with a special polyurethane foam adhesive foam. We invite you to familiarize yourself with it in detail, and also consider the technology of gluing extruded polystyrene foam.

What is adhesive foam and how does it differ from assembly foam?

Adhesive foam is a one-component composition that is sold in cans. In terms of consistency and method of application, it resembles the well-known polyurethane foam- applied to the surface with a special gun. After some time, the composition slightly increases in volume and hardens.

Since both materials are similar, many beginners are interested in the possibility of using polyurethane foam instead of glue, which is cheaper. You can glue extruded polystyrene or penoplex with the latter. Slabs secured in this way will even be able to withstand some pull-out load. But you should not use polyurethane foam instead of glue for the following reasons:

• The adhesive composition contains special additives that improve adhesion. Therefore, foam glue glues the slabs several times more reliably.
• Polyurethane foam greatly increases in volume. When installing penoplex, such quality is unacceptable.

Therefore, you should not try to save on glue when insulating houses with extruded polystyrene foam. All attempts to use polyurethane foam for these purposes eventually lead to peeling of the insulation or other problems.

Properties and characteristics - why is the composition better than a liquid solution?

Polyurethane foam is the only adhesive intended for the installation of penoplex. It reliably glues extruded polystyrene foam to any surface. Before the appearance of this composition, it was believed that this material was not suitable for installation using the adhesive method. Is it true, craftsmen They came up with technologies for gluing penoplex to walls, but its installation had to be done only at your own peril and risk. Foam glue is recommended for installation of this insulation by the manufacturers themselves; this is why it was developed.

The possibility of reliable gluing of penoplex is associated with the ability of liquid polyurethane foam to adhere well to any surface, including the smoothest. In addition, thanks to the additives, the composition has high technical characteristics:

The table shows that adhesive foam has not only good adhesion, but also a number of other advantages, such as:

• Low thermal conductivity - thanks to this quality, the composition is used for insulating seams. In this way, you can get rid of not only cold bridges, but also glue the polystyrene foam together. As a result, the likelihood of cracks forming in the plaster is reduced.
• High hardening speed - already two hours after installation of the slabs you can begin next stages work – grouting and reinforcement.
• Possibility of installation when negative temperatures. But not all types of glue have this property. Therefore, before purchasing a composition for winter, carefully read the instructions.

Adhesive foam has other advantages:

• Increases the speed of work - unlike a cement-based mixture, the foam does not need to be dissolved with water and brought to a homogeneous consistency with a mixer. It is applied simply and quickly. Therefore, the process of attaching the slabs to the wall is five times faster than when using a liquid mortar.
• It is light in weight - as a result, the transportation of material is simplified and the load on the foundation is reduced. If liquid solution increases the weight of the slab by ~3 kg, foam has virtually no effect on this indicator.

Therefore, it makes sense to use such glue not only for penoplex, but also for ordinary polystyrene foam, especially if it is necessary to perform installation work fast. True, its big disadvantage is its high cost.

Foam can be used as an addition to liquid glue, for thermal insulation and gluing seams.

Application technology - how to properly glue penoplex?

To install extruded polystyrene foam using foam adhesive, you will need some Additional materials and tools:

• façade primer;
• dowel-nails;
• façade paint roller;
• perforator;
• hammer.

Before proceeding with the installation of insulation, it is necessary to prepare the surface of the walls. If there are peeling and crumbling areas of plaster, you must definitely get rid of them. Otherwise, the slabs will fall off along with the old finish, and no glue will help.

Next, the walls need to be cleaned of dirt and dust. They can be wiped with a damp cloth or even washed with a hose. But after that they must be dried. The surface is then primed to improve adhesion and strengthen the wall. Apply the primer in a thin, even layer using a roller or brush. After the first layer has dried, it is primed again.

Now you can start gluing. A can of glue is prepared as follows: shake it thoroughly and screw a gun onto it. The composition is applied to the insulation along the perimeter in a continuous strip and in the center along the slab. Within ten minutes after applying the foam, it is necessary to attach the slab to the wall, lightly press it down and level it in all planes.

Already two hours after gluing, you can begin installing the dowels. They are necessary for additional fixation of the insulation. To install a nail, you need to drill a hole through the slab and hammer the fastener into it. The dowel caps should be slightly recessed. Each slab is fixed with at least five “umbrellas”.

If insulation is carried out in two layers, the second layer of slabs is glued to the first in the same way. The only thing is that the insulation of the second layer should be positioned offset to cover the seams of the first.

That's all you need to know about adhesive foam when installing extruded polystyrene foam. The main thing is not to forget that you can apply any glue, including polyurethane foam, only to clean surfaces. Therefore, prepare the walls well and wipe the slabs themselves if there is dust on them. Feel free to get to work, we wish you success!

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