Kiln brick: dimensions, characteristics, descriptions and reviews. What kind of brick is the stove made of? How to determine the red stove brick from the building

For laying a stove or fireplace, a special brick is usually used, which is also called fireclay. Such a brick has improved refractory properties and is made from quartz, lime and fireclay powder, which is sintered at very high temperatures.

There are standards - GOST 530-2007, GOST 390-96, 8691-73, which regulate the dimensions of oven bricks, and in accordance with which it is produced in a rectangular shape with dimensions of 228 x 115 x 64 mm, 250 x 124 x 65 mm. Despite this, manufacturers produce bricks of other configurations and sizes - a stove or a fireplace are quite complex structures with a wide variety of design solutions.

In addition to the usual, rectangular shape, they are produced wedge-shaped - for laying the vaults of arches, end, rib (see photo) and even plates with individual sizes, intended for industrial use in steel, glass-blowing, porcelain enterprises.

If you want to purchase oven bricks for making a stove or fireplace in your home, the question is which one is better to take, you don’t particularly have to. If you need a refractory brick for a stove, you need fireclay, if for a fireplace, you can take the main stove brick, or the same fireclay.

How and where to buy

Very often, construction stores do not have oven bricks in their assortment - this is an unpopular position among buyers, respectively, few people keep it in stock. Therefore, it will be necessary to order it, or contact the manufacturing enterprises. In both cases, the choice and purchase of oven bricks should be taken responsibly. First of all, you need to remember - to buy a brick, it is not enough just to order it, or just pay and pick it up. It is better to go to the warehouse and randomly select a few bricks from the batch offered to you for careful study. The surface of the brick must be free of cracks, chips and uniformly colored. All bricks must be the same size, regular shape, edges must be even and perpendicular.

It is also worth paying attention to the strength grade of oven bricks, the value of which can be from M175 to M500. The higher the number, the more durable and durable the product is; it goes without saying that the price of brick M175 is much lower than M500. However, one should not strive for savings here - replacing one or two bricks that have become unusable can entail significant time and cost for the services of a stove-maker.

When laying out the stove, every master must certainly remember that everything in this matter matters, including the quality of the material, as well as the professionalism of the stove-maker. If you want the stove to have good traction, and the products at the base retain and intensively give off heat, then even the most insignificant nuances cannot be neglected, and the choice of brick should also be included here. Therefore, before creating a furnace, it is necessary to figure out which material is better to choose, as well as what dimensions it has in order to make a calculation.

Description of kiln brick

The brick which is mentioned in the article can be fireplace or ceramic. In the latter case, we are talking about products for the manufacture of which red clay is used, such blocks are made using the firing technology. Among the advantages of this material is full compliance with state standards.

This brick can be used to build the top of a chimney where the stove heat will not be as intense. If you are interested in fireplace bricks, then you should know that they are further divided into 4 types:

• quartz;
• basic;
• carbonaceous;
• refractory fireclay.

Description of species

Quartz is made from quartz chips, sandstone and some clay. The main ones are made of magnesite and lime mixture. If we are talking about carbon brick, then it is made using the technology of pressing graphite and coke chips.

The most common today fireclay as the basis of this material is clay. When laying fireplaces and stoves, only fireclay and quartz bricks are used. Making a comparison between the first and the ceramic block, it can be noted that stove-makers most often prefer fireclay products.

Reviews

The oven brick, the dimensions of which are mentioned in the article, has many advantages and some disadvantages, which you can learn about by reading the reviews. Among the advantages, consumers note the ability of the material to retain heat for a long time.

Heat transfer occurs slowly, which is explained by the long-term preservation of heat by the fireclay furnace. Users also note disadvantages, which are expressed in the ability to quickly gain and retain moisture inside themselves for a long time. Therefore, fireclay is not recommended to be stored outdoors under the open sky.

Main characteristics

Kiln brick, the dimensions of which will be mentioned below, has two main characteristics that must be considered when choosing products. These include a frost resistance grade and a density grade. These features affect the quality of the block. The density grade is not an indicator of low or high quality, but an indicator that allows you to get the following information: the higher the density, the slower the brick will heat up.

Kiln brick, the weight, the dimensions of which should be of interest to any master, can have the following density indicators: from 100 to 500, intermediate values ​​are: 150, 200 and 250. You should not assume that the higher the density, the more suitable the material. A certain block will be suitable for the construction of individual objects. If you need a brick for the oven, then you should opt for a density grade no more than M-250. If you prefer products with a higher density, then kindling the furnace will be a real test.

Why pay attention to frost resistance

When choosing a material, it is important to take into account not only the dimensions of the standard oven brick, which will be discussed below, but also the frost resistance grade, which allows you to obtain information about the ability to return and absorb moisture.

This characteristic is important for products that will be used to equip the chimney. To carry out such work, you should choose a brick that has quite impressive frost resistance.

Dimensions and weight

On sale today you can find red oven brick, which can have different sizes. For example, the parameters of the standard block are limited to the following indicators: 250 x 120 x 65 mm. The end wedge has the same parameters as the side wedge, which, in turn, has the following dimensions: 230 x 114 x 65 x 55 mm.

If you prefer a plate, then it can have two sizes, among them: 460 x 230 x 75 or 600 x 230 x 90 mm. When choosing the size of the stove brick for the chimney and the stove itself, a standard shape should be preferred. With the help of a side wedge, curly masonry can be formed, while the end wedge is used for a narrowed poke. It will be possible to block the firebox with the help of a stove.

The size of the oven brick may be different. Thus, the standard material is made slightly longer, which allows it to be used despite its impressive mass. There are also one and a half and double ones. In the second case, we are talking about products whose length is twice as long as the length of a standard brick. If you are interested in the dimensions of a one-and-a-half red oven brick, then you should remember that its length is one and a half times longer than the length of a standard product.

Dimensions and characteristics of Vitebsk brick

In a wide range you can find several varieties of products from this manufacturer. For example, a ceramic furnace ordinary solid single brick, whose dimensions are 250 x 120 x 65 mm, may have a strength grade of 85 or 200. As for frost resistance, the material may refer to F15, F25 or F35. The water absorption of this material is 8%, and the thermal conductivity varies within 0.529 W / (m.K). The mass of one product is 3.7 kg.

The dimensions of Vitebsk kiln bricks vary depending on the type of product. For example, a ceramic ordinary solid thickened brick will have the following dimensions: 250 x 120 x 88 mm. Its water absorption varies from 13 to 14%. The mass reaches 4.8 kg, and the block is manufactured in accordance with GOST 530-2012. On sale you can find a ceramic ordinary solid brick with chamfers. Its dimensions remain the same as in the first of the mentioned cases, as well as mass, as well as thermal conductivity and water absorption. An ordinary solid profile single brick weighs somewhat less - 3.6 kg, but the thermal conductivity and water absorption remain the same, as do the dimensions.

Chimney dimensions

When laying a chimney, it must be remembered that its vertical dimensions will have the greatest impact on traction. A correct chimney should not have a height of less than 5 m. Among other things, the height difference between the roof surface and the head is of decisive importance. Thus, the top point of the pipe should be at the level of the ridge or be slightly higher at a distance of no more than 3 m. If we are talking about a flat roof, then the elevation above it should be 1 m or more. When chimneys are being equipped, brick dimensions must be taken into account. Thus, the wall thickness should be 10 cm, as regards residential buildings.

Along the entire length, the brick must be laid out in such a way that the area of ​​\u200b\u200bthe inside of the pipe is constant. The dimensions of the chimney also depend on the dimensions of the building. So, if the pipe is large, and you install it on a small house, then it will look comical. The lowest consumption of bricks can be achieved when the pipe has an internal dimension of 260 x 130 mm. This design will work if you lay out each row of 5 bricks.

You can find pipes of more impressive sizes, this applies to Russian stoves with a large portal. In this case, it is recommended to choose a stove brick, the dimensions of which will make it possible to form a channel section of 260 x 260 mm.

Conclusion

Chimneys can be laid from full-bodied ceramic which is designated as M-150, this is equated to stove bricks. For this, it is necessary to use an oven clay mortar, filling the seams completely. The thickness of the latter should be 10 mm or less. When the pipe is laid in the attic area and above the roof, cement must be added to the ingredients of the furnace mortar. Experts have recently advised using facing bricks for laying pipes above the roof, as it has high frost resistance.

In order for a fireplace or stove to have good traction, high thermal efficiency, as well as a reliable and durable design, none of the materials involved in the laying of this heating device can be neglected. Of particular importance is the choice of bricks from which a fireplace or an ordinary home stove is laid out.

For laying a stove or fireplace, a special refractory brick is used, which is called fireclay. It is made at high temperature from lime, quartz powder and fireclay. It is resistant to temperature extremes, able to withstand up to 1200-1500 degrees, moisture resistant. The high fire resistance of fireclay bricks indicates a high service life. The color of this brick indicates the degree of firing. Its shade varies from light yellow to red and dark brown. The lighter the color, the less degree of firing the brick block was subjected to during manufacture, which means that its surface will absorb moisture. The burnt brick is uneven and does not adhere well to the masonry mortar. The best option for high-quality fireclay is red brick. If you lay out the oven completely from fireclay bricks, its cost will be quite high. To save on its construction without losing quality properties, you can use combined types of brick material: use one type for interior masonry, another for cladding. So, for laying out the outer walls, the chimney, the base of the fireplace or stove, you can use ceramic bricks.

In addition to fireclay, the following types of adobe are divided:

• Red brick made from red clay by firing. Production takes place by semi-dry pressing or plastic forming. It easily withstands temperatures up to 800 degrees, but not higher, and therefore is recommended for laying chimneys in their least hot part.
• Silicate white adobe, having less strength than the first type. It is not refractory, so it can only be used when laying walls and partitions, but not furnace structures.
• Decorative with a glossy surface, used for laying out facades and facing works.
• Quartz - a subspecies of oven bricks, used in stoves and fireplaces, where metal structures are in contact with brickwork. Not used in combination with other materials (such as alkali or alumina).
• The main kiln adobe, consisting of magnesia and lime. Often used in the metallurgical industry.
• Carbonaceous: used in blast furnaces, consists of pressed coke.

Depending on the degree of firing, the grades of kiln bricks are determined: the first, second and third. The first grade is best suited for laying the stove: it is even, red or yellow. Frost-resistant and with high heat dissipation. The second grade is distinguished by a lower degree of roasting, as well as frost resistance and heat transfer. It weighs lighter than the brick of the first grade, therefore, there is more furnace material per ton of weight than in the first case. The third grade is burnt adobe of dark brown color. It is very dense, has high thermal conductivity, weighs more than the first two grades, and is suitable for laying the foundation.

The marking of oven bricks is carried out according to the following criteria:

• Dimensions

The standard size that a brick block has is a single one with dimensions of 250x120x65 mm. One and a half size is 250x120x88 mm, and with thickened walls, or double, - 250x120x138 mm. These dimensions refer to a regular-shaped bar (parallelepiped) made of clay and used for chimneys. The size of fireclay bricks (standard) is usually 460x230x75 or 600x230x90 mm. This is the so-called fireclay plate used to cover the fireboxes.

• Strength

At the maximum level of withstand temperature, the second letter of the marking of fireclay bricks is either "A" or "B". In the first case, the bar can withstand temperatures up to 1400 degrees, in the second - 1300/1350 degrees.

• Frost resistance

It is marked with the letter "F".

• Brick geometry indicators

Hollow, thickened and with a horizontal arrangement of voids of adobe are designated by markings "P", "U" and "G", respectively.

• Density

The higher the density index of fireclay bricks, the slower it warms up. Density marking is as follows: 100,150,200,250,500. The optimal indicator for laying the oven is 250, since a very dense brick material creates a very slow heating. Given that fireclay bricks contain impurities of chemicals, with prolonged slow heating, they can begin to be released into the surrounding air. For the same reason, furnace elements that interact with food products are not laid out from it.

• Form

In addition to the usual shape of a parallelepiped, red brick is produced in two forms: wedge-shaped radial-longitudinal and radial-transverse. Each of these forms of bars is single size and thickened.

The form of fireclay bricks is as follows: straight, end wedge, ribbed wedge, breech. At the same time, it is marked as Sh. Bars in the form of an end and rib wedge are used for curly masonry. The standard form is considered to be a breech (with dimensions of 250x120x65). The dimensions of the wedge bars are 230x114x65x55mm.

fireclay brick oven

Due to its qualities, fireclay bricks are used not only for laying furnace furnaces, but also for fireplaces and stoves. At the same time, it gives the design of home comfort due to its soft golden hue. Figured bars allow you to lay out various sections of the furnace from fireclay bricks of various shapes and sizes. In addition, the stove itself can be lined with fireclay bricks, and the external design of arches, pillars and other external elements distant from the firebox is made using facing bricks, which can be of two types - shaped and textured. The chimney should be laid out from full-bodied fireclay. When choosing the size of fireclay bricks for building a chimney and the furnace itself, you should stop at the standard form. The shape of the side wedge will help form curly masonry, and the end wedge will be useful for a narrowed poke. The overlap of the firebox is formed using a fireclay plate. For laying the base, you can use ceramic adobe.

The design of the furnace is built using brick blocks of a single module. It is not recommended to use different thicknesses of bricks, because, in this case, their bond will be fragile, which will lead to the destruction of the stove. In extreme cases, a combustion chamber is laid out from an excellent module when greater structural strength is needed to withstand temperature changes.

Recommendations for the selection and use of oven bricks

One of the disadvantages of fireclay bricks is that it is able to absorb moisture with a long subsequent release. Therefore, it is not recommended to store it outdoors. For laying out the main parts of the furnace structure, it is required to choose only red brick, and not burnt or unburnt, since in this case its qualitative properties are lost. The brick must have an even shape with sharp edges and dimensions declared in accordance with GOST.

The surface of the chamotte should be matte, without any film, which may indicate that, with possible temperature drops, the adobe can collapse.

When struck with a hammer on the surface of a brick bar, a clear, sonorous sound should be made. A dull sound indicates the presence of voids, as well as poor hardening and drying. No marks should remain at the impact site.

When chamotte is split in half, one can judge its quality: the structure must be dense, uniform. It should not contain any foreign inclusions, including small pieces of clay - this indicates a violation of the technology in the manufacture of brick material.

For the construction of the furnace, it is enough to use the M250 fireclay brand, a denser structure will warm up for a very long time.

When choosing a material, you should pay attention not only to the dimensions of the red brick for the stove, but also to the brand of its frost resistance, since it indicates the ability to absorb moisture and dehumidify, which is especially important when installing a chimney.

Hyper-pressed adobe can be used when laying outdoor barbecue ovens, but it is not recommended to use it for home ovens, since the limestone included in its composition is unstable to high temperatures and begins to break down under the influence of carbon dioxide released.

Red brick with a density of M200 cannot be used for laying the combustion chamber and chimney, as well as the outdoor part of the pipe, since it can collapse within one to two years.

You can use the old fireclay left after the dismantling of buildings and structures, provided that its structure is not destroyed, and the surface is intact. At the same time, the old masonry of the brick used had to be clay or cement. If the old masonry was on a limestone base, such adobe can only be used as a base for a fireplace or pipe heads. Old fireclay used in laying out stoves can also be used, provided that its surface is well cleaned of soot, otherwise black spots will appear on the outer surface of the pipes and the front of the stove elements during new laying.

The main element in any home, providing comfort and a family atmosphere, is the hearth. And this is not surprising, since the multifunctional oven device not only heats the building during the cold season, but also allows you to cook food. Modern trends increasingly involve the use of gas, electric stoves or a centralized heating system. All of these options have long supplanted natural stoves or fireplaces from their leading positions.

Today, both a real Russian stove and a fireplace are considered a luxury. This is due to expensive building materials and the laborious work required for construction. It is very important that the brick for the furnace meets certain indicators and has good resistance to aggressive high-temperature environments. Otherwise, the structure will fall apart literally within a few years. So, how a refractory material is chosen and what requirements are imposed on it - in our article.

What kind of brick is better to use for the oven?

Refractory block - a product designed to create an inner shell in fireplaces, stoves, chimneys and pipes. They act as a protective layer that isolates the fire and prevents the penetration of heat to other interior elements in the house.

The quality and service life of the heat source is completely dependent on which brick to choose for laying the furnace. First of all, it is necessary to narrow the assortment range, highlighting only refractory blocks. However, even this classification has many subspecies, differing in the degree of technical features, cost, size and appearance.

Bricks for stoves can vary in shape, ramzer, color, but they all have one thing in common - resistance to fire and high temperature

It is equally important to be able to distinguish a quality product from a fake, which soon loses external data and begins to crumble. When erecting a heat-resistant capsule, it should be remembered that this process has a completely different technology, not similar to the laying of an ordinary wall.

The task of ensuring security in the house is no less urgent. An improperly selected building material with lower functional abilities may not meet the user's expectations and, moreover, cause serious negative consequences, affecting the entire property.

What is chamotte clay

Chamotte is a refractory material, for the manufacture of which clay is fired. During heat treatment, it completely loses its plasticity and all water-based binders to the state of sintering.

There are primary and secondary clays. The primary, which contains kaolin in a high concentration, is characterized by low plasticity and almost white color. Secondary - more plastic, it is used for the production of ceramic products, the construction of stoves, fireplaces and chimneys.

There are no finished deposits of fireclay clay, of course. These are combinations of certain components:

• White clay;
• red clay;
• fireclay;
• crushed chalk;
• talc;
• quartz sand;
• kaolin.

It is this composition that gives the optimal combination of characteristics that withstand continuous direct combustion and temperatures up to 1200 ° C.

What is suitable as a refractory

To create a heat source, in addition to the main building material, a heat-resistant block, it is necessary to prepare the following products:

1. Clay mixture - needed for mixing the solution. It can be of three types: pure building material, without impurities, greasy with the addition of sand or lean.
2. Limestone - is used as an additional mortar component, is used in the process of laying the foundation base, constructing channel heads.
3. Sand with a small fraction, mainly the use of grinding rocks.
4. Chamotte is the main component used as an additive for fire-resistant clay.
5. Piping, asbestos, alabaster and felt.

To create a dense insulating layer in the area between the foundation and the base of the furnace, it is necessary to lay roofing material. Structural floors are equipped with steel fasteners.

A variety of refractory building materials

The choice of brick for masonry is a responsible task, since this building material is the basic component of heat-resistant cladding. Most of the components, such as exterior cladding, chimney lining and ceilings, use standard ceramite or red clay bricks. The remaining elements subjected to temperature influences are made of fire-resistant building material.

Refractory bricks are 70% refractory clay, the remaining 30% are graphite and coke additives

One of the important indicators is the marking of bricks, which determines the degree of its density and strength. At the moment, there are many variations, but the most optimal rhenium will be a block with an index not exceeding 250.

High density product has good heat conductivity but slow heating. This source is very difficult to melt, the process takes a lot of time. However, its cooling occurs at a slow pace, which is very important for any heating device.

The brand of brick for laying the furnace differs from the heat-resistant product only in that it is able to withstand temperatures exceeding 1000 ° C and not crack when cooled.

There are four product groups:

1. Quartz material - a mixture of clay and sand, molded, after which it undergoes a firing process;
2. The main one is intended for the arrangement of metallurgical structures;
3. Carbonaceous - graphite is included in the composition. Not recommended for private use;
4. Fireclay is the best option that can withstand temperatures reaching 1600 ° C.

VIDEO: Furnace master's advice

Features of the production of bricks for laying the furnace

The technical and physical characteristics of the product are determined by GOST 8691-73 "Refractory products for general purposes":

• its standard dimensions are 23x11.4x6.5 and 25x12.4x6.5 cm;
• weight from 2.4 to 6 kg depending on the porosity of the structure;
• texture - granular;
• color - from white to yellow;
• shape - rectangular, parallelepiped, trapezoidal and wedge-shaped.

Contrary to popular belief, chamotte is made not only from refractory clay - it is only 70-72% in the composition. A third of the volume is occupied by graphite and coke additives.

The manufacturing technology requires compliance with the exact parameters of the ingredients, maintaining a certain temperature during firing and processing time. In burnt brick, the glass phase increases to 10%, which is unacceptable for refractory. Unburnt can burst at high temperatures and absorb moisture too much, which is especially critical for chimneys.

High-quality fireclay refractory bricks - ShBR-A1, ShBR-A2

In view of the strict quality requirements, bricks of the ShA-5, ShA-8 brands are more expensive than their counterparts and are made in limited quantities. Only capsules are built from such material; they are not used for cladding.

Depending on the composition, refractories are divided into 3 main groups:

1. The main one is made from a lime-magnesium composition and is used for blast furnaces in metallurgy.
2. Carbonaceous - coke and graphite pressed with refractory clay. It is also used in industry and metallurgy.
3. Quartz - a complex combination of sand, quartz and chamotte clay, due to which a very dense structure is provided. It categorically does not accept the effects of alkali, therefore it is used only for the construction of capsules in stoves and fireplaces.

Modifications from different manufacturers

Unfortunately, in the domestic market it is difficult to find the ideal fireclay brick for the construction of a Russian furnace device. It is difficult to explain why, but because of this, the task is much more complicated. However, from the entire assortment, you can choose products that are closest to the requirements of construction. Consider modifications from popular manufacturers.

Basic requirements for oven bricks

To create masonry, a block should be used that does not contain voids, cracks or chips. In addition, you need to pay attention to the quality of firing, the correctness of the shape, color matching.

If the block has spent little time in the kiln during firing, its color will be pale mustard. When burned, the product will take on a dark shade. While tapping on the element, a ringing sound similar to metallic noise should be pronounced.

An equally important criterion is the uniformity of color. High-quality building material has the same shade on all surfaces and inside when broken.

• Silicate;
• Hollow block;
• Recycled product;
• Material with cracks, dark spots or chips.

In order for the constructed heating device to serve for a long time without complaints, not to lose its attractive appearance and not undergo cracking, it is necessary to responsibly approach the task of selecting the main building material. It will not be superfluous to find out which brick is needed for masonry and by what criteria it should be selected.

VIDEO: Why it is impossible to build furnaces without refractory bricks

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For the construction of stoves and fireplaces, a special type of masonry material is selected - a full-bodied stove brick. It has a set of such characteristics that allow it to be used for arranging furnaces, chimneys and the very body of stoves and fireplaces. The main qualities of such material do not allow it to be used for other purposes.

Varieties

Commercially available brick for the oven has several varieties:

• fireclay (it can be rectangular, wedge-shaped, trapezoid in shape);
• backfill (another name is ordinary);
• facing.

Each variety has its own purpose. Fireclay refractory bricks are used when laying out fireboxes, the use of ordinary stove bricks is limited to the construction of a chimney or casing. Facing, if necessary, goes to the exterior of fireplaces or stoves. All types of kiln bricks are highly resistant to high temperatures.

Material Properties

Refractory clays are a part of the raw materials going on production of kiln bricks. Fireclay bricks can withstand temperatures up to 1000°C and above, literally up to 1800°C, they are able to come into contact with chemicals. Quartz powder, graphite or coke are added to some types of oven bricks.

Dimensions and weight

The following dimensions and weight of solid kiln bricks are generally accepted.

Zabutovochny (ordinary):

• Single (250 × 120 × 65 mm; 3.3-3.6 kg);
• One and a half (250 × 120 × 88 mm; 4-4.3 kg);
• Double (250 × 120 × 138 mm; 6.6-7.2 kg).

Fireclay, the most common types:

• ShB-5 (230x65x114 mm; 3.4 kg);
• ShB-8 (250x65x124 mm; 4.0 kg).

Advantages

In addition to fire resistance, kiln bricks have a good ability to give off accumulated heat for a long time, while not creating a danger to surrounding objects with excessively high temperatures, without provoking a fire hazard. It perfectly fulfills its main tasks - to dissipate and accumulate heat. When laying the body of a stove or fireplace, products with a strength grade of M-175 or more are needed. Otherwise, the oven will not last long. Subject to all the recommendations, the oven will stand intact for many years, because the material will not rot, will not be destroyed by mold, insects.

Another advantage of oven bricks is the ability to withstand large temperature fluctuations. Furnaces made of such material can be installed in rooms that do not have heating, and even just on the street.

Flaws

Among the shortcomings can be noted a rather high cost. However, when building furnaces, it is impossible to save, ceramic brick is not suitable for a furnace, it will collapse very quickly, because the maximum temperature that it can withstand without problems is 800 ° C.

Technical characteristics of kiln bricks

The fireclay brick from which the firebox is laid out has the following technical characteristics:

• density - 1700-1900 kg / m³;
• fire resistance - not lower than 1650 ° C;
• tensile strength - 12-23 N / mm²;
• thermal conductivity - 0.62 W / (m ° C);
• porosity - 8%;
• frost resistance grade - F15-50;
• strength grade - M75-250;
• water absorption - 25%.

The external difference between fireclay bricks and other varieties is clearly visible in the photo and video: it is yellowish in color.

According to consumer reviews, low moisture resistance does not allow the use of this material for other purposes. If you build a house out of it, then it will be damp and uncomfortable. Therefore, the best scope is the construction of stoves, fireplaces.

Having decided to purchase a batch of this masonry material, you need to figure out how these products should look externally. Even one manufacturer can put on sale products that are completely different in quality. Therefore, when buying, you need to focus on the following indicators:

• choose a batch with heavier products, because a lot of weight indicates a high density;
• accurate correct form with minimal error;
• a high-quality brick, when tapped on it, gives a sound similar to metal;
• when splitting, the internal structure of the material is visible: it should be of the same even color without spots.

You can check the quality of products directly at the warehouse of the trade organization. In the store itself, such manipulations should not be carried out.

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