How many cinder blocks in a cube: a system of measurements and calculations when choosing building materials. MegaMasterok - a portal about construction and repair 1 cube of slag how much cinder block is obtained

What is a cinder block? This is a building stone, which is obtained by pressing or natural shrinkage in the form of cinder-concrete mortar. Its standard size is 400x200x200 mm. The cinder block is produced both industrially and at home. As a filler for cinder blocks, blast-furnace slag, crushed stone of a fine fraction, broken brick, expanded clay, granotsev, broken cement, cullet and other industrial waste can be used, and cement is used as a binder.

This building material is universal and can be used in almost all areas of construction, and the construction of residential buildings was no exception.

Why do you need to know how many cinder blocks are in a cube? Wall volume is measured in cubic meters. Therefore, in the project of the house it will be indicated that the masonry of the walls will be so many cubes. And this is not always a “round” figure. In order not to buy a large stock, we need to calculate the exact amount of cinder block.

How to calculate cinder block?

For the calculation, we need to know only one value - this is the volume of one block. Calculating the volume is very simple, for this there is a formula that everyone should know:

V (volume) = L (length) x B (width) x H (height)

We measure the dimensions of one cinder block, namely the length, width and height and multiply them. Dimensions will be measured in centimeters. One cubic meter is 1,000,000 cubic centimeters.

Let's do the calculation. Let's say we have a block with dimensions of 40cm x 20cm x 20cm. Its volume (V) will be equal to:

V \u003d 40x20x20 \u003d 16000 cm3

To find out how many cinder blocks are in a cube, we perform the division operation:

1,000,000 cm3 / 16,000 cm3 = 62.5 pcs

For clarity, let's calculate how much partition cinder block is in 1 m3. Its dimensions are 400x200x120 mm. We translate millimeters into meters and get 0.4x0.2x0.12 m. We multiply these dimensions and get the volume of one partition block:

0.4x0.2x0.12 m = 0.0096 m3.

Now let's do the division:

1 m3 / 0.0096 m3 = 104.17 pcs.

Here we have calculated everything. The cinder block can be made in different sizes, substituting them into the formulas above, you can quickly calculate everything.

For transportation, the blocks are stacked on pallets and usually there are more or less than a cube (the exact volume is indicated on the packaging). For construction, materials are always bought from a stock of 5-10%. This must be taken into account in the calculation.

Pros and cons of cinder block

Advantages:

Good geometry - the cinder block has good geometry and even with a slight deviation there will be nothing to worry about, since the laying is carried out on a cement-sand mortar 1 cm thick. This, in turn, will level out small deviations in geometry.
Simplicity in work - no need for highly qualified workers, such as, for example, when laying bricks.
Construction speed - due to its considerable size, construction from cinder block is much faster than from brick.
External attractiveness - it is possible to build from blocks for fine finishing with subsequent jointing or for grouting due to the even and smooth edges of the block. But here it must be remembered that it is impossible to leave the block, it must be hydrophobized, since it collapses under the influence of moisture.
Relatively low cost due to the cheapness of the cinder block components in comparison with brick and gas block.

Disadvantages:

High thermal conductivity - a house made of this material will quickly lose heat in winter and heat up in summer.
Heavy in processing - the stone is quite hard in comparison with the gas block or shell rock.
Large weight - weigh one block from 22 to 28 kilograms, depending on the percentage of voidness.
Radioactively not safe - it can fonit due to such a filler as blast furnace slag. Therefore, when buying a stone, it must be checked for radioactivity!
Non-environmentally friendly - industrial waste is used in its production.
Low frost resistance - F15-F35.
It collapses under the influence of moisture - therefore, it needs protection, for example, plaster and competent waterproofing between the wall and the foundation.
Poor adhesion to cement-sand plaster - there is a possibility of plaster peeling, so you always need to use a plaster mesh, and this is an additional cost.
Poor soundproofing - additional measures are needed to soundproof the building.

Novice builders often face the problem of correctly calculating the required amount of material. In order not to be mistaken with the numbers, it is necessary to take into account the dimensions of the material and the future structure, the necessary margin for cutting, debris and other features. Our article is devoted to the intricacies of calculating such a building material as a cinder block.

Pros and cons of the material

The appearance of cinder blocks is directly related to the natural human desire for waste-free production. In the USSR in the post-war years, production developed at a rapid pace. Metallurgical plants literally overgrown with mountains of slag. Then the decision came to use this waste to create building materials.

The slag served as a filler for the cement-sand mixture. The resulting mass was molded into large "bricks". The finished blocks were too heavy - they weighed 25-28 kg. To reduce weight, voids were made in them. Hollow specimens turned out to be a little lighter - from 18 to 23 kg with standard dimensions.

The name cinder blocks is still used today, although not only slag, but also other components are used as fillers. In modern blocks, you can find granite screenings or crushed stone, river gravel, broken glass or expanded clay, volcanic mass. The production of cinder blocks is most often done by small businesses. Small private enterprises produce building blocks on vibrating machines, filling several molds with a cement mixture at once. After molding and tamping, the "bricks" gain strength for at least a month.

Cinder blocks are endowed with certain advantages and disadvantages.

The advantage of block building material, first of all, is its low cost. That is why the material is in great demand.
This building material also has other positive characteristics. For example, blocks do not change their size after laying out. The structure will not shrink, which means that the design calculation will not be adjusted during the construction process.
The strength and hardness of the "big brick" determine its service life. This is nothing less than 100 years! Durability is not calculated, but tested by time. There are many buildings of the middle of the last century, "firmly standing on their feet." The houses have not squinted or crumbled, only the facades require cosmetic repairs.
Blocks react poorly to ultraviolet and temperature changes. The material is not edible for rodents and insects.
Due to the increased size, the construction is proceeding at a rapid pace. Much less masonry mixture is used for laying blocks than, for example, for a brick wall of similar sizes.
Behind the cinder block wall, street noises are not heard, because it is able to absorb sounds.
Finally, with simple equipment and desire, blocks can be made at home, which will further reduce the cost of construction.

The disadvantages of the building material are no less than the advantages.

These include the following characteristics.

Nondescript appearance.
The problem of fastening to the walls due to voids in the body of the block.
The need for cladding to make the structure attractive and protect the building material from the effects of external moisture.
Fragility. If dropped during work, during transportation or loading, the unit may break.
High thermal conductivity. Without additional insulation, the structure does not retain heat well.
Wide tolerance limits. Dimensions may differ significantly from the face value.

Dimensions

The sizes of cinder blocks directly depend on their types.

Standard cinder blocks are products with the following parameters, measured in millimeters:

length - 390;
width - 190;
height - 188.

Due to the small difference between width and height, both values are often assumed to be the same, equal to 190 mm.

Hollow and full-bodied products have similar sizes. The first, as lighter ones, are used exclusively for laying walls. The latter can serve as the starting material not only for walls, but also for foundations, columns or other structural elements of buildings that carry the greatest loads.

Slag half-blocks are always hollow. Overall dimensions may differ only in thickness (width). The length is constant and remains equal to 390 mm, height - 188 mm.

Thicker semi-blocks are 120 mm wide, while thinner ones are only 90 mm wide. The latter are sometimes called longitudinal slabs of cinder blocks. The scope of semi-blocks is internal walls, partitions.

There is a "giant" in the slag family - a building block, increased in size. Its dimensions are 410x215x190 millimeters.

Payment

For the construction of any object (house, garage or other outbuildings), information on the number of cinder blocks is required. Extra building material is useless, and a lack can lead to downtime and additional costs for loading, transporting and unloading the cinder block. In addition, different batches, even from the same manufacturer, may differ slightly. What can we say about buying the missing blocks from another supplier!

There will be no problems with the construction of the building due to the lack of basic material if you first calculate the need for cinder blocks with maximum accuracy. Of course, you will have to buy more. First, because you always need a reserve. And secondly, the blocks are not sold by the piece. Manufacturers stack them on pallets and fasten them so that the goods do not break during delivery to the buyer, and it is convenient to load them into vehicles.

If necessary, you can purchase material and by the piece. However, the lack of reliable fastening is fraught with the presence of chips and even complete destruction. In order to calculate the need for building blocks, for example, for a house, you need to know the dimensions of this building.

First of all, you need to remember the school curriculum, more precisely, the definition of areas and volumes. The task is simple, accessible to everyone and does not require any engineering knowledge.

The number of cinder blocks required can be calculated in two ways.

By volume. The volume of the walls of the building is determined, the number of bricks in 1 m3 is calculated. The volume of the building in cubic meters is multiplied by the number of blocks in one cube. It turns out the required number of slag bricks for the whole house.
By area. The area of the walls of the house is calculated. The number of blocks per 1 m2 of masonry is found. The area of the walls of the house is multiplied by the number of pieces of cinder blocks in one square meter.

If you need to calculate the number of building blocks per square meter, two dimensions are taken into account: length (390 mm) and height (188 mm). We translate both values into meters and multiply with each other: 0.39 m x 0.188 m = 0.07332 m2. Now we will find out: how many cinder blocks per square meter. To do this, divide 1 m2 by 0.07332 m2. 1 m2 / 0.07332 m2 = 13.6 pieces.

Similar calculations are performed to determine the amount of building material in one cube. Only here all block sizes are involved - length, width and height. We calculate the volume of one cinder block, taking into account its dimensions not in millimeters, but in meters. We get: 0.39 m x 0.188 m x 0.190 m = 0.0139308 m3. The number of bricks in 1 cube: 1 m3 / 0.0139308 m3 = 71.78 pieces.

Now you need to find the volume or area of all the walls of the house. When calculating these parameters, it is important not to forget to take into account all openings, including door and window openings. Therefore, each construction is preceded by the development of a project or at least a detailed plan with doors, windows, openings for laying various engineering communications.

Consider the calculation of the need for material for the house in a "volumetric" way.

Let's say the house is planned to be built square, with a length of each wall of 10 meters. The height of a one-story building is 3 meters. The thickness of the outer walls is the thickness of one cinder block, that is, 0.19 m.
Find the volume of all walls. Let's take two parallel walls equal in length to ten meters. The other two will be shorter in length by the thickness of the walls already taken into account: 10 m - 0.19 m - 0.19 m = 9.62 m. The volume of the first two walls: 2 (number of walls) x 10 m (wall length) x 3 m (wall height) x 0.19 m (wall thickness) = 11.4 m3.
Let's calculate the volume of two "shortened" walls: 2 (number of walls) x 9.62 m (wall length) x 3 m (wall height) x 0.19 m (wall thickness) = 10.96 m3.
Total volume: 11.4 m3 + 10.96 m3 = 22.36 m3.
Suppose that the house has two doorways 2.1 m high and 1.2 m wide, as well as 5 windows with dimensions of 1.2 m x 1.4 m. You need to find the total volume of all openings and subtract it from the previously obtained value.

Cinder blocks can be sold by the piece or by cubic meters. For ease of transportation, loading and unloading, pallets are used. Before starting construction work, it is necessary to calculate the amount of material, so it is important to know how many cinder blocks are in the pallet.
A pallet is a wooden structure, that is, a stand on which cinder blocks are placed. This design is strong and durable, it allows you to transport various types of materials. One cubic meter of cinder blocks can be placed on a standard type pallet. To find out how many cinder blocks are in a pallet, you need to calculate their number in one cubic meter.

First you need to calculate the volume of each unit separately. Since the same type of cinder block is placed on the pallet, it is enough to multiply the length by the width, and by the depth of one block.
After that, the amount of material in a cubic meter is calculated, for this the volume of all material located on the stand is divided by the volume of one unit.
To make it convenient to calculate the quantity, the dimensions are converted to meters.

Cinder blocks can have different sizes, their number in the pallet depends on this.

dimensions 390*190*190, 71 pieces in a pallet;
dimensions 390*190*94, 194*190*190, 142 pieces in a pallet;
dimensions 194*190*94, 96*190*190, 333 pieces in a pallet;
dimensions 290*190*190, 100 pieces in a pallet;
dimensions 290*190*190, 200 pieces in a pallet;
dimensions 96*94*190, 588 pieces in a pallet.

Such calculations concern both hollow materials and solid blocks. The above calculations are considered inaccurate, since it is very difficult to ideally put blocks on a stand without a gap. All calculations depend only on the block size. The most popular are standard sizes, that is, 390 * 190 * 190, if gaps are observed between the material, then its capacity in the pallet will be 60 pieces.

Why is it necessary to calculate the amount of material in a pallet?

When building any building, the amount of material needed is calculated in order to know how many blocks to purchase. This helps to immediately calculate the cost of the material, the area of \u200b\u200bthe room, and how much you need to order in order to be enough for the entire building. Otherwise, a lot of time, effort, and additional costs will be spent if the material is not enough, and it will have to be bought in addition.
Cinder blocks are delivered to the place on a pallet, so you need to know in advance what size of block is needed, and its quantity on one stand. Also, when calculating, it must be taken into account that the material may come with a marriage or deteriorate during operation, therefore, it is purchased with a margin of up to 10 percent of the total.

Material Advantages

The cinder block has its advantages and features.

The material is economical, as it is distinguished by its low cost.
With low-rise buildings, the blocks are characterized by sufficient strength and durability.
Also, the block wall is light in weight, which means that the foundation is subjected to a minimum load.
The blocks are resistant to infection by fungus and mold, they are resistant to any environment.
The material is resistant to fire, does not burn, and does not melt.
All the work can be done independently, since the blocks are not heavy.
If necessary, you can make blocks yourself.

How much does a cinder block weigh?

The weight of the block will depend on its dimensions, and the product may be full or empty inside.

A solid block is considered the most durable material, but it is much heavier than a hollow cinder block, it is used for the construction of load-bearing structures and large structures. The weight of such material is from 25 to 29 kilograms.
Hollow stone is used for the construction of various kinds of walls, its weight ranges from 12 to 23 kilograms.
Semi-blocks are hollow, therefore they are used only for partitions and internal walls, their weight is from 9 to 13 kilograms.

The weight of the block is affected by its size, that is, large material will have a large mass. Basically, the weight of a standard cinder block allows one person to perform self-laying without resorting to outside help, this helps to save construction costs.

How much mortar goes per cubic meter of masonry?

When erecting buildings, they usually use the usual ratio of cement to sand in a solution, that is, 1 to 4. But this principle is applied to brick buildings, this is not acceptable for a cinder block, since its area is large.
For this material, a solution is prepared from 8 parts of cement, one part of sand, and enough water so that the mixture is not too rare.
If the solution is prepared according to the above scheme, then from 210 to 250 liters of the mixture will go to one cubic meter of cinder block masonry. The amount of mortar will depend on the brand of the base material, that is, cement.

The effect of cinder block on health

The cinder block is made from waste in the smelter, so there is a possibility of inclusion in the composition of a harmful substance for human health if any component exceeds the norm. The material actively absorbs moisture, as a result of its evaporation, toxic substances can be released.
Harmful impurities depend on the type of slag used in production. The best material is the smelting of iron ore, so the waste from this production is considered to be of high quality. To minimize the risk of a threat to health, you must follow some rules.

First of all, when purchasing the material, you must require a quality certificate from the manufacturer.
In order for the blocks to be completely safe for health, the material must be in the air for about 36 months, so you need to find out the date of its manufacture or purchase it in advance, if possible.
The walls can be covered with waterproofing material, and then finished with bricks. From the inside, finish the coating.
In a research institute of a building type, analyzes are made for the presence of toxic substances in the material, a small chipped sample is sufficient.

Cinder block has various advantages and disadvantages, like any material. Its lightness allows you to build structures yourself, which plays a role in cost savings. Also, the material has a low cost, which allows you to build various structures such as garages, sheds, outbuildings, and even residential premises. Before erecting a structure, its total area, the amount of material required, and how much is in one pallet are calculated. Such calculations allow you to purchase the right number of blocks at a time to avoid additional transportation, and costs in case of a shortage of material. To avoid the release of toxic substances from the blocks, it is necessary to perform additional surface finishing after the walls are erected, it is insulated or waterproofed from the outside, and the main finishing work, plastering, wallpapering or paint is performed from the inside. Thus, the above methods help to accurately calculate the amount of cinder block in one pallet.

Cinder blocks are sold both by the piece and by cubic meters. To make it convenient to load, transport and unload this material obtained by pressing at the place of delivery, the blocks are placed on special pallets. And if the building is being built from a cinder block, the question arises before the private developer as to exactly how many pieces of building material are placed on a standard pallet.

What are pallets?

This is a special container that provides convenience not only for loading and unloading, transportation, but also for storage. Most manufacturers, as a rule, indicate the cost per piece of cinder block, but they sell this block material on pallets. When making a purchase, you need to check with the company about the rules for using this capacity.

Some firms deliver the blocks on pallets and then unload the material to the construction site. They return to other companies after the completion of the expected scope of work. Such use can be free of charge or for a fee. It is difficult to store a cinder block without pallets, so this nuance must be discussed in advance.

How is the number of cinder blocks on a pallet calculated?

Exactly one cubic meter of cinder blocks is placed on a standard pallet. And in order to determine the amount of building material placed on such a container, it is necessary to calculate how many blocks are contained in a cubic meter. This calculation is mandatory. The calculation is not difficult:

First, the volume of each block is calculated. Since a cinder block of the same size is placed on the pallet, the length * width * depth is multiplied among themselves, that is, all three sides of the element.
Calculate the number of blocks in a cubic meter. The total volume of building material placed on the pallet is divided by the volume of one block calculated in the first paragraph.

It is inconvenient to carry out calculations in millimeters or centimeters, so the dimensions of the cinder block are converted to meters for easier calculation. Thus, the following calculation formula is obtained: N cinder blocks \u003d 1 / (length * width * depth), which allows you to find out the number of elements on one pallet.

The number of cinder blocks in one pallet

Cinder blocks are produced in various sizes. And in order to find out the exact number of pieces placed on a pallet, it is necessary to take into account the dimensions of the purchased material:

71 pieces (390x190x190)
142 pieces (390x190x94 and 194x190x190);
333 pieces (194x190x94 and 96x190x190);
100 pieces (290x190x190);
200 pieces (290x190x94);
588 pieces (96x94x190).

These are building solid (monolithic), and hollow, and facing cinder blocks. Of course, for cladding, blocks in pallets are purchased exclusively for large construction projects.

What should be considered when calculating cinder blocks in pallets?

The above calculations are approximate. They are based on the exact actual block sizes. It is impossible to lay the building material on a pallet so that there is no space between the individual elements. In addition, this is fraught with the creation of a certain pressure and the likelihood of damage to the cinder blocks during loading, unloading, and transportation. Therefore, considering this aspect, it should be remembered that the calculation error can be up to 10-15 blocks. It all depends on the size of the block.

Standard sizes 390x190x190, which are the most popular, are usually presented on manufacturers' websites as 400x200x200. It is in this embodiment that it is best to calculate the number of pieces in a pallet. Therefore, if standard cinder blocks are bought, then the actual capacity of the pallet, given the presence of space between the stacked elements, is not 71 pieces, but exactly 60 blocks.

Why is it necessary to know the number of cinder blocks in a pallet?

Each construction requires a count of consumables. This applies not only to large objects, but even small houses, garages, outbuildings, and so on. A private developer always needs to know in advance how much the project will cost. For this purpose, the number of cinder blocks in the masonry per square meter is calculated, which allows, taking into account the total quadrature of the walls, to calculate how many pieces of material to order.

However, taking into account that the cinder block is delivered to the construction site in pallets, it is required to calculate in advance which batch to order. However, some blocks may come with a marriage or be damaged directly at the construction site, so the material should be purchased with a margin of at least 10-15%. This is, as a rule, many builders and invest in the very calculation error that is obtained when calculating the true dimensions of the blocks.

To find out how many cinder blocks are in a cube, just perform a simple calculation. It is made before the start of work, when products are purchased by the piece or by cubic meters. Usually, cinder blocks are sold on pallets, the quantity and volume of which depend on the type of product and the weight of one unit of goods.

As part of the project for the construction of any facility, an estimate is developed, which takes into account the amount of work. Brick and cinder block masonry in this case are measured in cubic meters. The number given in the document is not always an integer, which causes certain difficulties in the calculation. Then it is necessary to determine the number of cinder blocks not only in 1m3, but also in 1m2, because the execution of exterior and interior decoration is characterized by a different unit of measurement.

If the project is being developed by a construction company, then you can turn to it for help. Specialists themselves will calculate how much material is needed, they will advise which store it is better to contact. In the case of an independent development of a construction project, you will have to manually calculate the amount of required building materials. The estimate for construction is most often a custom-made document, which is compiled by a specially trained person - an estimator. The estimate contains information not only about the scope of work, but also their cost. The latter is not the only correct one, because depends on many factors. In this case, when calculating the cinder block masonry, the quality of the cement introduced into the cement-sand mortar, the cost of additives, the presence of reinforcement, etc. are taken into account.

To calculate the amount of cinder block in 1 m³, you need to take into account several features:

There are several types of cinder block, which differ in purpose and size, as a result of which its quantity changes to 1 m² and 1 m³. When using different types of products (facing, standard, partition), you will need a different amount of material.
The cinder-concrete product consists of blast-furnace slag, crushed cement, granular screening or crushed stone, and cement is used as a binder. The composition does not affect the amount of products in 1 cubic meter, but changes its mass. This should be taken into account when transporting the calculated amount of material to the job site. Also an important factor is the presence of voids in the product.
Cinder blocks can be made at home, in which case the dimensions may differ slightly from the dimensions of industrial products. Here it is necessary to take into account the average values of the lengths of the sides of the building material in order to determine how many cinder blocks are in a cube.
The dimensions of the standard block are 390x190x190 mm. When calculating, these dimensions increase slightly and are taken to be 400x200x200 mm, this is due to the presence of a solution with a minimum thickness of 10 mm between the blocks.

How to calculate the number of blocks in 1 m³?

The calculation of the cinder block is made according to simple formulas. First you need to calculate the volume of one product (V), measuring its length (L), width (W), height (H) and multiplying these values:

V=L*W*H (cubic meter)

It is better to substitute the dimensions in the formula in meters, this will not lead to errors in the further calculation.

To find out how many pieces of cinder block (N) per 1 m³, you need to divide this number by the resulting volume:

N=1/V (pieces)

These formulas are universal, they will allow you to accurately calculate the amount of cinder block in any volume accepted on the basis of the estimate. With their help, you can also determine the amount of material in order to build a cinder block house, an extension to it, and other objects.

Calculation example

How many standard type cinder blocks are in one cube?

Let's define the volume: V= 0.4*0.2*0.2=0.016 cubic meters.

Let's determine how many cinder blocks are in one cube: N=1/0.016=62.5 pieces.

That is, one m³ contains 62.5 pieces of cinder block. The estimated amount of cinder block per house, measured in cubic meters, must be multiplied by the number of products in 1m³. As a result, we get the total amount of material needed for construction.

When calculating, it is worth paying attention that the amount received must be increased by 10-15%. This will eliminate the shortage of building materials in case of marriage, damage to blocks during construction, etc.

How much cinder block in 1 m²?

Calculate the area of the base of the cinder block: S \u003d L * W (square meter).
Determine the quantity: n=1/S (pieces).

Using these formulas, you can determine how many cinder blocks in 1 standard pallet are on the same level. During transportation, the blocks are located close to each other, this preserves their integrity, eliminates mechanical damage and reduces the dimensions of the cargo. However, pallets are not made in 1 m², they are standard and have a size of 1.2 x 0.95 m.

Calculation example

How many standard cinder blocks are in 1 m²?

Base area: S=0.39*0.19=0.0741 m².

Quantity: n=1/0.0741=13.5 pieces.

With standard pallet dimensions, the first tier contains: m=1.2*0.95/0.741=15 pieces.

To calculate how many blocks are in 1 m³, it is necessary to take dimensions of 0.4x0.2x0.2 m. This will provide more accurate results. When calculating the amount of building material in 1 m2, it is necessary to take the actual dimensions of the product without taking into account the thickness of the concreting joints.
Depending on the type of cinder block, its quantity on the pallet may differ. Standard packaging contains 75 elements of a hollow block or 45 solid blocks. The total weight of the product on the pallet should not exceed 1 ton. The weight of a solid block is 20 kg, of a hollow block - 13 kg.
When choosing a building material, it is necessary to determine the required properties in advance. The hollow product has a lower thermal conductivity due to the presence of air chambers, which ensures that it remains cool in summer and warm in winter. A full-bodied product is characterized by increased sound insulation.
The number of cinder blocks in 1 cube depends on the type of product. The standard block has dimensions of 0.39x0.19x0.19 m³, the partition block - 0.39x0.19x0.12 m³, the facing block - 0.39x0.19x0.09 m³.
In the manufacture of a mixture for laying a cinder block, a cement-sand mortar is used with the addition of glue or various plasticizers. This provides greater adhesion of surfaces, the mobility of the mixture for a long time and the rigidity of the hardened mortar.

Using the above formulas, you can easily determine how much cinder block is needed in pieces for a specified amount of work. In order not to buy too many building materials, it is enough to use elementary calculations. This will eliminate additional costs for the purchase of the product itself, as well as its transportation.