DSP board - application for flooring: technical characteristics, advantages and installation

How to quickly and efficiently, but at the same time with minimal waiting time, level the floors in an apartment or house? If the speed of work is very important, and creating a conventional cement screed is impossible, then a DSP board is perfect for this purpose. The use of this building material for flooring allows you to make surfaces smooth very quickly. In this case, the coating will be durable and of high quality.

DSP board - application for flooring

Cement particle boards: application in construction

DSP is a cement-bonded particle board, and the name fully reflects the composition of this material. DSPs are made from a mixture whose components are wood shavings and cement compounds.

What are DSP and OSB? What is the difference?

The building materials include:

• wood shavings with fractions of various sizes – 24%;
• water – 8.5%;
• special additives – 2.5%;
• Portland cement – ​​65%.

DSP boards for external use

The production process is quite simple - DSP is made as follows.

1. Special aqueous solutions are loaded into special mixers, which include various salts, liquid glass and aluminum.
2. Next, wood shavings with fractions of different sizes are gradually added to these solutions - mineralization of the raw material occurs.
3. Cement is mixed into the resulting composition and a little more water is added.
4. The mass is thoroughly mixed until smooth and then goes under a powerful press.

GOST 26816-86. Cement particle boards . Technical conditions. Downloadable file (click the link to open the PDF in a new window).

GOST 26816-86

The result of this production chain is a finished cement bonded particle board, which is quite thin and has a smooth surface. A large amount of cement in the composition allows you to create a fairly durable material. By the way, the chips inside the slab are larger in size than outside, due to which the smoothness of the surface of the finished material is achieved. DSP does not need to be further leveled after installation, making the material excellent for creating a rough floor covering for laminate, tile and other types of finishing. Also, no voids are formed inside the DSP during production.

Production of cement particle boards

On a note! Wood shavings are also used as a raw material in the production of chipboard, fiberboard and OSB boards. The technologies for producing these materials are somewhat similar to the technology for producing CBPB boards.

Comparative table of performance characteristics of wood-based materials

Expert opinion

Afanasyev E.V.

Chief editor of the pol-exp.com project Engineer.

DSP boards are widely used in construction. They can be used to decorate the facade walls of houses, and they can be used to create various partitions indoors. The material is suitable for use for restoration purposes and for interior finishing work. Moreover, it is suitable for both apartments and private houses.

DSPs are used in construction for many purposes

The DSP board is characterized by high environmental friendliness, as it is created from natural materials and practically does not contain additional chemical ingredients. That is why the stove is recommended for use both in residential premises and in production.

Cement particle board (CSP)

Using a cement bonded particle board is an opportunity to avoid the labor-intensive pouring of cement screed to create a base. The building material allows you to reduce labor costs and spend less money from the budget planned for leveling floors for laying the finishing coating.

Installation of a DSP board under ceramic tiles

How is DSP made?

The cement-bonded particle mixture from which CBPB is made is a kind of concrete based on a mineral binder. Only instead of sand and crushed stone, the filler in it is small wood shavings. The introduction of wood into the composition of the slab reduced its density, but most importantly, the shavings played the role of not only a light filler, but also fiber - an additive that creates volumetric reinforcement that absorbs tensile loads.

The mixture for making the slab includes:

• cement – ​​65%;
• chips – 24%;
• water – 8.5-9%;
• mineralizing and hydration additives, – 2-2.5%.

Preparation of the mixture begins with chopping the chips to the desired size. After this, it is divided into two fractions on sieves. Small ones are used to form the outer layers of the sheet, larger ones for the middle layer. It is then treated with calcium chloride, “liquid glass”, aluminum chloride or sulfate. This is necessary to protect the material from rotting and fungal attack.

Sifted and treated with mineral additives, shavings are mixed with water and cement. Additives that accelerate the hardening of cement dissolve in water. In addition to the above components, fuel oil and industrial oil I-20 can be added to the mixture in small quantities to reduce internal friction and facilitate pressing.

The prepared mixture is laid out in three layers on pallets, the pallets are stacked and placed in a cold press, where this “package” is compressed to a pressure of 1.8-6.6 MPa and secured in this state with locks. A special locking system maintains pressure in the mold after it is removed from the press.

The compressed bags are heated for 8 hours. During this time, accelerated hydration of cement and its hardening occurs. Wood shavings, due to their elasticity, compensate for cement shrinkage, so the specified dimensions of the slabs do not change. Unlocking molds and relieving pressure also occurs in the press. After this, the package is opened, and the slabs are removed and placed in a buffer warehouse for 1-2 weeks.

For final ripening of the material, it is blown with air at a temperature of 70-100 ° C. After this, the sheets are cut to size, sanded, sorted and transferred to the finished product warehouse.

Characteristics of CBPB boards

DSP is a completely new category of material, characterized by significant strength, long service life, and a certain level of moisture resistance. It also has good soundproofing and heat-saving properties. All these features have allowed CBPB boards to take a strong place in the construction industry - they are used for various purposes.

Of course, this material is far from ideal, but still, thanks to its properties and characteristics, it can be used both outside and inside the building. The DSP board does not lose its qualities in a wide variety of climatic conditions.

DSP

On a note! Compared to chipboard, which is common for many, a board based on cement and shavings is 3 times stronger and has high resistance to various physical influences and loads.

Table. Key parameters of the DSP.

The density of one cubic meta CBPB board is quite high - about 1300-1400 kg/m3. The moisture content of the material is 6-12%. By the way, the material is not 100% protected from the effects of water, but swelling upon contact with liquid over a full day should not exceed 2%.

Characteristics of cement bonded particle boards

The slab is rough to the touch, but smooth - often these indicators depend on the grinding method used. Sometimes the DSP does not need the latter - if the roughness level is no more than 80 microns. The plate is selected in accordance with the operating conditions, as well as the requirements for the final results. For example, smooth slabs are usually used indoors, but rougher slabs can be used outside.

On a note! Finishing of DSP boards is simple - any type of floor finishing can be laid on them, and paint, varnish, plaster, etc. can be easily applied to the surface.

Cement particle board - transportation

Features of installing DSP on facades

The DSP board, reviews of which are presented below, is mounted on a frame prepared in advance. I use long self-tapping screws as fasteners. Insulation should be provided between the wall of the house and the facade. Due to the fact that cement particle board is a fairly heavy material, it must be secured at least at three points.

A gap of up to 8mm wide should be provided between the plates. This need is dictated by the fact that during high humidity the slab can diverge, increasing or decreasing.

Such a gap will help to avoid bulging. For the same reason, you should not seal the resulting seams with finishing materials such as putty and cement mortar.

Advantages and disadvantages

What are the main advantages and disadvantages of slabs over other similar materials? Let's look at the answer to this question in more detail.

Pros and cons of CBPB boards

Advantages of DSP:

• environmental friendliness of the material, as it is made from natural ingredients. DSP does not contain asbestos and formaldehyde-containing substances;
• fungus and mold do not settle on the slabs
• the material is not hygroscopic - this is its main advantage over chipboard;
• DSP does not suffer from temperature changes and does not lose its performance qualities;
• 100% non-flammability of DSP boards allows them to be used in any room. The material can withstand fire for 50 minutes;
• reasonable price , allowing you to purchase material even if you have a small budget;
• significant strength due to multi-layer material. Excellent performance is observed under pressure both from the end of the plate and from any of the other sides;
• the slab does not require additional leveling of surfaces ;
• the material is not afraid of chemical influences;
• cement particle board perfectly resists rotting processes;
• relative impermeability to water - during the day, DSP is able to absorb a maximum of 16% of liquid;
• high noise insulation and heat insulation qualities;
• ease of installation.

DSP boards have many advantages

On a note! It is recommended to use DSP boards when installing a water heated floor system. In this case, it will be possible to create an additional air gap between the heating and the finishing coating, which will significantly improve the result of the work done.

The disadvantages of plates are as follows:

• large mass of material, which makes working with it difficult;
• During processing, the DSP generates a lot of dust . If you have to cut slabs, you should wear a respirator and safety glasses to avoid harm to your eyesight and respiratory organs.

The easiest way to finish DSP boards is to paint them with acrylic or silicone-based compounds, leaving deformation gaps between adjacent sheets

However, the material has many more advantages than disadvantages, which explains its popularity in construction, including for leveling floors. Typically, CBPB slabs are laid on logs - this is the best option for using the material in this area. More often, DSP is installed under laminate, carpet, linoleum, and ceramic tiles.

In general, it can be noted that in most respects, CBPB boards are superior to plasterboard, chipboard and fiberboard, which makes them one of the best building materials. Also, DSP will save a lot of money if a choice is made in their favor.

Cement particle board for flooring

DSP: features when working with slabs and installation recommendations

Wood panels have gained wide popularity in construction. Along with undeniable advantages (ease of processing and installation, availability), wood-composite materials also have disadvantages. These include poor water resistance, deformation and delamination upon contact with moisture, as well as the content of harmful formaldehyde resins. To avoid these negative features, cement bonded particle boards were created. In the article “DSP classification, selection and scope of application” we have already examined the main properties of this material; in this publication we will talk about the features of the operation and installation of DSP.

First, it is necessary to clarify some technological points. First of all, it is important to understand that DSP is not quite a wood-composite board in its usual sense (OSB, chipboard). The share of shavings in the structure of the material is 30–20%, the rest is Portland cement and chemical additives for the mineralization of the wood component, so the properties of the slab are closer to concrete products.

• Weight - cement particle boards have significant weight, so installation by one person is difficult, especially when it comes to wall cladding at the level of the second or third floor.
• Fragility - do not forget that cement is a brittle material, so it is not recommended to throw CBPB. If there is nothing on the OSB when dropped from a height, the cement board will most likely crack.
• High density - the material has a high density, this allows it to perform load-bearing functions, but at the same time cutting is difficult. Woodworking tools are not suitable for working with DSP.
• Low bending strength - the minimum bending strength established by GOST for the TsSP-1 grade is 12 - 9 MPa. There should not be much mechanical stress in the sheet, as this can lead to the plate breaking under its own weight.

Storage of CBPB sheets

The slabs should not be lifted by the edges parallel to the ground, this can lead to the material breaking under its own weight. It should be carried with the edge to the ground and stored in a horizontal position.

• Dusty work – when cutting with DSP, a large amount of cement dust is released, for this reason cutting in a confined space is difficult. When working, you must use a respirator.
• Thermal expansion is a property that, to one degree or another, is inherent in all types of wood-composite boards. In DSP, deformations caused by changes in humidity and temperature levels are minimal, but they are still present, for this reason it is necessary to make an expansion joint during installation. It is not possible to seal it with a hard material such as putty or cement, since due to deformation the cement-bonded particle board products will put pressure on the seam. As a result, cracks will appear.

Cutting the material is an important step when working with DSP. As mentioned above, the sheets have significant weight, so installation is usually carried out in one step. To do this, the sheets are marked on the ground in advance, numbered, holes are drilled for self-tapping screws and countersinked. We must not forget about creating holes for communications (pipes and wiring), cuts are made according to the markings, then part of the sheet is simply knocked out.

Although the material belongs to wood boards, it is difficult to use tools for woodworking. Drills and cutting elements of the saw must be made of hard alloys.

• A grinder (angle grinder or angle grinder) is a hand-held tool for grinding and cutting various materials. For cutting DSP, we will be primarily interested in the cutting functions of the device. The main parameter is considered to be power. If we are talking about cutting several sheets for a small area of ​​flooring, then you can get by with a household grinder, but such a tool is not suitable for intensive work. For active use throughout the working day, it is better to take models with a power of 2 kW or more. When working with an angle grinder, it is important that the operator’s hands are covered with a protective cover. To make cutting in different positions easier, some models feature an adjustable handle and an adjustable guard.

When cutting hard concrete products, segmented diamond discs are used. The segments allow the working element to be cooled by air circulation.

• Circular saw – a hand-held, table saw or stationary circular saw can be used to cut cement-bonded particle boards. Using a guide allows you to get an even cut. The choice of power, as for an angle grinder, depends on the intensity of work. To cut material with a circular saw, it is better to use a diamond blade for hard materials. It is recommended to take the diameter of the disc at least 250 cm. A useful feature of the circular saw is the presence of a pipe for connecting a construction vacuum cleaner, this will reduce the amount of cement dust in the air.

When cutting CBPB, it is imperative to use respiratory and eye protection (respirator, safety glasses).

In most cases, the sheets are attached to the frame using screws or nails. Other fasteners are used for auxiliary work, for example, when installing sheathing.

• Anchor bolts are used to fasten brackets with lathing to the main wall when installing curtain facades and partitions.

• Rivets are a rod fastening element that is closed on both sides by heads, connecting two structural elements. Rivets are used to fasten the sheathing to the brackets. Installation is carried out by a riveter.

• Mushroom dowel – designed for attaching insulation.

• Nails are steel rod fastenings. Screw nails are used to fix the DSP. When the slab moves, the nail will bend, but will not cut it off. This property is especially important for inclined planes. It is better to choose galvanized hardware, especially when it comes to using products in conditions of high humidity. The length of the nail should be 2.5 times greater than the thickness of the sheet. For example, it is recommended to fasten slabs 8–10 mm thick with nails 2.5 mm long and 35 mm in diameter; 40 and 50 mm long are suitable for 12 and 16 mm.

Example of using different fastening systems

• Self-tapping screws are the most common method of fastening CBPB, since the self-tapping screw acts on tearing, which is important due to the large weight of the slab. Holes for fastenings must be made in advance; it is recommended to use a screwdriver for tightening. The principle of selecting fasteners is the same as when selecting nail sizes. Before tightening the screws, the holes are countersunk to recess the head. Fasteners equipped with a countersunk head and reinforced blades for better fastening can be used without pre-drilling holes or countersinking. It is recommended to use only self-tapping screws with anodized or galvanized coating. It is better not to use phosphated products (black screws), since after finishing the rust may show through the paint.

One of the common ways to use DSP is as a curtain wall, which allows you to insulate, increase sound insulation, level the wall of a house and protect it from the aggressive influence of the external environment. Curtain facades are used for brick or wooden houses. It has a multilayer structure, which consists of different layers.

• Brackets are steel fasteners that serve to fix the curtain wall to the wall. These elements should be selected based on the house design; for this purpose, specimens of different lengths and thicknesses are produced. To mount the DSP, it is best to use a reinforced bracket. Another function of this element is the alignment of the façade relative to the main wall. For this purpose, special brackets with variable length and holes for fixing the moving part are designed.

Various types of brackets, the third has an adjustable length for leveling the curtain wall

• Vapor barrier - placed between the insulation and the wall. Allows steam to freely exit the house through the wall, preventing it from condensing on the wall.
• Insulation – a layer of insulation allows heat to remain inside the house; the insulation can be attached in one layer or in two. In the latter case, the layers should overlap each other, eliminating “cold bridges”. The insulation layer is attached using a mushroom dowel.
• The windproof layer performs a waterproofing function, allowing air to escape from the house, but preventing moisture from entering the wall.
• The air gap (vent gap) serves for normal air circulation inside the wall; the presence of ventilation contributes to the evaporation of condensate. The size of the ventilation gap must be at least 20 mm from the windbreak to the outer side of the sheathing.
• Sheathing is an element that serves to hold a sheet of DSP; the sheathing can be made horizontal or vertical. The material you can use is a 50*50 mm wooden beam or a steel frame. If the sheathing is attached directly to the wall without brackets, then the insulation will not fit under it - such a wall will simply be a facing wall.

Lathing options for attaching a curtain wall façade for CBPB

• DSP layer - sheets must be attached to each rack at at least three points. In this case, it is necessary not to forget about expansion joints, which should be 3–5 mm. Cement-bonded particle boards are attached to the sheathing using self-tapping screws. It is better to drill holes in the sheets on the ground in advance.

• Finishing layer - a decorative finishing layer in the form of paint or plaster that is applied to the DSP.

To level the wall, two brackets are fixed to two anchor bolts, the level between which is measured with a rope (mooring); a hydraulic level . This is a measuring device that works on the principle of connected vessels.

The hydraulic level consists of two containers with scales, which are connected by a transparent tube. The containers are filled with colored liquid. Two people are required to operate this measuring device. It is necessary to ensure that the liquid in both containers is at the same level on the scales.

lines are hung on the upper brackets for beating the wall vertically. The length of all other brackets is set relative to the plumb line. When the levels are installed, the brackets are fixed in increments of no more than 600 mm.

The technology of frame houses has recently gained wide popularity. The main advantages are the speed of construction and the availability of materials. There is also a place for DSP in this matter. OSB (OSB) is considered more common in this area - oriented strand board. OSB is often cheaper in cost than cement board, but cement board is more environmentally friendly, since it does not contain harmful resins. Also, cement products have high moisture resistance, while oriented strand board begins to deform when exposed to moisture. For all these reasons, DSP can be used in frame house construction.

Oriented strand board is a material made from large chips that are arranged in layers. The elements are oriented along different axes, hence the name of these products. In each layer, the chips are directed in a certain direction, overlapping the previous one. Synthetic resins are added as a binding element.

The frame is the “skeleton” of the house; it is covered with panels that form the strength body of the building and provide thermal insulation. These panels are sometimes called “pie” because they are made up of many layers. There are a large number of panel layout variations. Sometimes the DSP is fixed on the frame itself, then there is a layer of vapor barrier, a sheathing made of timber, between which the insulation is attached. On the outside, the “pie” is completed by another outer sheet of DSP. The thickness of the sheets can vary from 10 to 16 mm. Moreover, if the house is multi-story, then block and beam structures will be required to lift the sheets to the height of the second floor. Holes for self-tapping screws are also made in advance. Fasteners are installed every 15 cm. In the central part of the sheet, fastening every 30 cm is allowed. One slab should fit three sheathing posts. Do not forget about the expansion joint, which is filled with sealant to protect the heat insulator.

House frame covered with DSP sheets

Inside the house, DSP is used to create partitions, cladding walls and ceilings, and for laying subfloors.

• Subfloor - laid out for subsequent installation of a finished floor in the form of laminate or parquet. DSP finds application in different variations of this element of house construction. The most primitive option for a subfloor is laying the covering directly on the ground. In this case, you can use sheets with a thickness of 24 - 26 mm. For frame houses, the first floor is formed on top of the foundation frame; the floor consists of a system of joists on which cement-bonded particle boards are laid. To create insulation, a layer of thermal insulation, vapor barrier and wind protection is installed. A similar floor structure can be used when building a house from timber; the joist system is usually built into the frame. In fact, in this case, the DSP replaces the concrete screed.

Use case when CBPB replaces a concrete screed

If a concrete screed is present, but its evenness leaves much to be desired, a layer of cement-bonded particle boards can even out the flaws. To do this, the sheets are laid on a system of logs, the distance between which should be no more than 600 and no less than 300 mm. The thickness of the cement coating should be 20 – 26 mm. Technological gaps must be left not only between the sheets (2 - 3 mm), but also next to the walls (10 mm). To do this, wooden choppers are installed between the wall and the outer slab.

Wiring a frame house

If there is a smooth concrete screed or subfloor, the installation of DSP can be done using adhesive mixtures. To do this, the solution is thoroughly beaten and evenly distributed with a notched spatula. The sheets are seated on the composition, the seams are also filled with glue.

Option for installing flooring with adhesive composition

• Partitions are elements that allow you to divide the interior spaces of a house into rooms. The DSP is mounted on a rack-mount metal frame or lathing made of wooden beams. The frame is attached to supporting structures (floor, ceiling, walls) with anchor dowels (plastic or metal). If a timber frame is installed, the material must be treated with antiseptic agents. Sound insulation tape is laid at the junctions with supporting structures. To insulate the partitions, a layer of mineral wool is placed inside. Cement-bonded particle boards are attached to the frame using self-tapping screws or nails.

Structure of an interior partition made of DSP

• Finishing of premises - products made from shavings and cement allow you to level the surface of curved walls, in this case the design resembles a curtain wall, only the work is done inside the house. The sheathing frame is constructed from wooden blocks, which are treated with antiseptics, or a steel profile. The profile or lathing is fixed to the wall, sound insulation and insulation, if necessary, are placed between the DSP and the wall. Also, in some cases, attachment to various adhesive solutions is allowed.

Steel lathing for subsequent fastening of CBPB

• A flat roof is an economical roofing method, usually used for sheds, workshops and other outbuildings, although in modern high-tech houses a flat roof is not so uncommon. Cement slabs can be used to create roof coverings. They are secured to the beams using self-tapping screws. To avoid leaks at the seams, sheets are usually laid in two layers, with the top layer overlapping the bottom. The roof covering is covered with several layers of roofing material for waterproofing. Ruberoid is attached to bitumen mastic. Corners are installed along the edges, which are secured with self-tapping screws and press washers.

Often, houses lined with DSP are painted or plastered directly on top of the slabs; this type of finishing is very simple and convenient. Thanks to the even geometry of the sheets, the paint will adhere well after simple preparatory procedures. Good adhesion ensures easy adhesion of the finish coat.

• Deepening of fasteners - the heads of screws and nails should not rise above the plane; for this they are recessed into the material.
• Repairing chips - during construction work, defects, chips, and scratches may appear on the slabs. Before finishing, they need to be covered with putty.
• Defects on the surface – after installation, various color defects (efflorescence, traces of rust) may form on the surface of the slabs. These unnecessary “patterns” are cleaned off with a soap solution.
• The primer is made with elastic acrylic paint, it can be applied even before installation, then it will be possible to cover all the ends.

Painted frame house in fechwerk style

It is recommended to carry out painting 6 – 7 months after installation. The procedure is carried out in two stages. The first layer is preparatory - in some places it can be lighter or darker, the second layer already allows you to obtain an even coloring of the surface. It is best to use acrylic, silicate or latex paint.

Thus, working with DSP compared to oriented strand board has a number of nuances. The products are heavy, which requires the efforts of several people during installation. It is better to do all holes, measurements and manipulations with products on the ground. With proper preparation, the surface of cement bonded particle boards can be easily painted.

DSP in insulation works

Most often, DSP is used in the field of insulation of buildings and structures. Usually the material is sheathed on the outside of the building. Fixation is done using self-tapping screws or nails.

But, since DSP is an environmentally friendly material, wall and floor cladding can also be done from inside the room. The sheathing process is similar to what is done outside: the material is attached to a wooden or metal sheathing using nails or self-tapping screws. Sometimes adhesive mastics can also be used. After installation of the slabs, finishing is carried out.

Sheathing frame structures using cement bonded particle boards is a reasonable solution

Types of DSP. Fibrolite, Arbloite, Xylolite

The above are the general characteristics of CBPB, however, there are three main types of cement-bonded particle boards, each of which has its own characteristics.

— Fibrolite is a derivative material of CBPB, also consisting of a cement mixture, binders and wood, which is no longer used in the form of small shavings, but in the form of so-called wood wool.

Wood wool is long-fibered wood shavings. Fiberboard is well suited for thermal insulation and sound insulation. Coniferous wood is used to make fiberboard because it contains water-repellent resins.

Fiberboard is widely used for installing permanent formwork under a foundation or plinth, wall insulation, insulation, sound insulation and wall finishing.

fiberboard boards

— Arbolit is a type of lightweight concrete, it is also called wood-concrete. The composition of wood concrete is varied and contains small wood shavings, sawdust, straw, and may even contain dry reeds. The highest quality slabs of this variety are made from wood chips. Arbolite is heavier than the original CBPB and is more prone to deformation. Wood concrete is used for the installation of wall partitions, thermal insulation and the construction of small structures.

wood concrete panels

— Xylolite, a type of CBPB, also consists of a mixture of wood waste, a cement mixture and a magnesium binder mixture, magnesium chloride oxide. The production technology differs from the plates noted above. The material has increased thermal insulation and strength properties, is not flammable, and is moisture resistant. Used for installation of flooring, roofs, as well as exterior and decorative finishing.

xylolite boards

— the length of cement-bonded particle boards is made in two sizes: 270 and 320 cm

— the width of the DSP also comes in two sizes: 120 and 125 cm

— thickness from 8 to 36 mm

Application for floor

DSP is often used to create a subfloor. Most often, the material is laid with the expectation that in the future ceramic tiles will be glued to it - this is the most demanding coating in terms of the evenness of the base. DSPs are also suitable for pouring three-dimensional floors and for installing soft floor coverings.

Scheme for the implementation of water heated floors using DSP boards

DSP slabs can be mounted on logs, and also laid on a flat concrete or wooden base. The material lasts for many years and is able to withstand significant loads if installed correctly.

DSP slabs for flooring - photo

Application area

DSPs are used in the construction of frame houses because they do not emit harmful substances, have high strength, are low flammable, emit a small amount of smoke during a fire, and do not support open combustion. Having high mechanical strength, they increase the rigidity of frame structures. All this makes frame houses sheathed with DSP safer and of higher quality.

Cement particle boards are used for construction, finishing

Objects for using DSP

DSP sheets can be used in the construction of the following objects:

• Frame residential buildings up to 3 floors inclusive.
• Industrial, office buildings.
• Hotel complexes.
• Kindergartens, schools.
• Medical institutions.
• Sport halls.
• Warehouses, hangars.

Disadvantage: the DSP board has a significant mass (several times heavier than OSB), which increases the requirements for the foundation. The heavy weight also becomes a problem when climbing to the second floor - you need helpers and scaffolding or lifting equipment (at least a winch). Another disadvantage of DSP is its low resistance to bending loads. This limits their scope of application - they are placed on the base, in places with low bending load, or must be mounted vertically.

Frame houses are built using DSP

Resistance to weathering and high humidity, fungi and bacterial infections allows the use of cement-bonded particle boards in the construction of outbuildings: sheds, outdoor toilets, cellar garages.

For finishing external and internal works

Another area of ​​application for cement particle boards is leveling floors and walls. Compared to other materials, the DSP board has better sound insulation characteristics, is not susceptible to fungi, and tolerates climatic influences well. Therefore, they are often used to create ventilated facades.

Examples of using DSP in the construction and finishing of private houses

For interior finishing, DSP boards can be used for the following work:

• Soundproof and fire-resistant partitions and walls.
• Internal cladding of premises for any purpose (residential and non-residential, including those with high humidity).
• Window sills.
• Rough floor.
• Ceilings.

The positive point is that there are cement bonded particle boards, sanded and unsanded. Polished ones have an absolutely smooth surface. When using them, you can only seal the seams and then paint, glue wallpaper, or use other finishing methods.

Choosing cement sheets for the floor

The choice of DSP boards is carried out in accordance with the conditions in which the material will be used, as well as the technology by which its installation will be carried out. For laying on logs, slabs with a thickness of 20-26 mm are used - they will perfectly cope with their function as a rough base. If installation is carried out directly on the ground, then 24-26 mm slabs are used. In general, almost any DSP board can be used to level floors.

Average market prices for material

On a note! DSP boards can be laid even in cold weather. It doesn’t matter if the air temperature outside the window drops below zero.

Requirements for CBPB slabs used for floor installation:

• humidity – from 6 to 12%;
• density – more than 1300 kg/m3;
• tensile strength – 0.4 MPa;
• surface roughness – 80 microns;
• moisture absorption level – 16%.

For the floor, DSP boards must be used that meet a number of requirements

Dimensions and weight

When purchasing materials for construction and finishing work, such characteristics as the size and weight of the material are important. DSP sheets are available in two sizes: with a width of 1250 mm, the length can be 2700 or 3200 mm. In this case, the thickness of the DSP boards can be 8, 10, 12, 16, 20, 24, 36 mm.

DSP board: scope depending on thickness

It is clear that the thicker the slab, the greater its mass. Approximate weight values ​​are given in the table (different manufacturers may have deviations both in the direction of increasing and decreasing weight).

Weight of cement bonded particle boards depending on size and thickness

You may also need the following parameters:

• area of ​​one sheet: 1250*2700 - 3.375 m²;
• 1250*3200 - 4.0 m²;

The DSP sheet is a homogeneous monolithic material without air inclusions, which explains the high thermal conductivity of the material. This must be taken into account when developing an insulation cake. The material adheres well to wood, polymers and metal, so it is convenient for construction work.

Preparing for the installation of a DSP coating

Before starting work on arranging a rough surface made of CBPB, the base of the floor must be properly prepared. For example, when laying material on a wooden base, old or rotten boards must be dismantled and replaced with new ones. It is important to seal all the cracks with putty, and the wooden base is primed for better adhesion to the glue on which the slab covering will be mounted.

If installation will be carried out on a concrete base, then it should also be carefully inspected for damage and repaired if necessary. Also, if there are strong horizontal deviations, leveling is done with cement mixtures. When laying CBPB on the ground, it is necessary to first level the surface - this can be done by pouring a 20 cm thick sand-gravel mixture onto the ground and compacting it.

The process of building a gazebo with a DSP floor

The best option is to lay CBPB slabs on logs. In this case, if it is planned to install the foundation directly above the ground, supports for the logs are installed on the ground, and hydro- and thermal insulation is also laid. The distance between the supports can vary from 0.5 to 1 m - this indicator depends on the thickness of the timber used for the logs.

Materials and tools that need to be prepared for working with DSP:

• timber for logs (section 150x100 or 50x100 mm);
• DSP boards in the required quantity;
• antiseptic solution for timber;
• sawing tool (for example, a hacksaw);
• materials for waterproofing and insulation;
• tools for taking measurements (tape measure, pencil);
• fastening material;
• drill.

Fastening floor slabs using self-tapping screws

Characteristics and properties

DSP board is a relatively new material, not yet widely used in private construction. This is because not everyone understands how he behaves in the long term. To understand whether it is good or not for your purposes, you need to know about all the properties.

Density and mass

Density of CBPB is 1100-1400 kg/m³. High density gives frame structures an increased level of rigidity. If this material is used for interior finishing work, such walls have sufficient load-bearing capacity to support shelves, cabinets and other fairly heavy objects.

Specific resistance to pulling out self-tapping screws from a CBPB board

The material is quite dense and heavy. One sheet with a height of 2700 mm - depending on the thickness - weighs from 37 kg to 164 kg. This makes it inconvenient to cover the second floor and above. This can be considered a disadvantage.

Thermal and humidity expansion

Another important characteristic for construction is linear expansion with changes in humidity and temperature. For a CBPB board it is present, but it is small. When placing the plates one next to the other, it is recommended to leave a gap of 2-3 mm between them. When installing the second row (in height), the recommended gap is 8-10 mm.

• Normal humidity for sale is 9% (±3%).
• Low water absorption allows this type of material to be used for exterior finishing and for covering walls in rooms with high humidity. When in water for 24 hours, the limit for thickness increase is no more than 1.5%. That is, when wet they hardly change size.

What else is worth knowing: when immersed in water, the dimensions change slightly - 2% in thickness and 3% in length. If the material is made according to technology, then even after a long stay outdoors in the open air, it does not change for years.

Strength indicators and installation features

Cement particle boards do not tolerate bending deformations well, but have very high strength under longitudinal loads. Therefore, they are used for installation on vertical surfaces. Manufacturers do not recommend laying them on joists, but when laid on a subfloor or rough screed, the material behaves stably. Since the DSP board is not afraid of water, it can be laid on the floor in rooms with high humidity.

Elastic modulus:

• in compression and bending 2500 MPa;
• tensile strength - 3000 MPa;
• in shear - 1200 MPa.

If the CBPB is mounted on a frame, sheathing is required in increments of at least 60 cm. During installation, fasteners are installed in increments of 20 cm. We install self-tapping screws not only along the perimeter, but also along the intermediate rivers of the sheathing. In this case, tiles can be glued onto the DSP board (a primer, after it dries - not an adhesive composition, the tiles can be laid).

Fire hazard and frost resistance

The DSP board is a hard-to-burn material; fire does not spread across the surface; toxic or harmful gases are not released during combustion. Fire resistance limit (ability to contain fire) - 50 min. This means that the material will collapse after 50 minutes in the fire.

High frost resistance - the decrease in strength after 50 freezing/thawing cycles is no more than 10%, which allows the material to be used for building houses even in the Far North. The service life of this material outdoors is 50 years.

Comparison of DSP and OSB in terms of flammability

It is these properties that make DSP the more preferable material in frame house construction. The structure turns out to be more reliable in terms of fire safety.

Soundproofing properties

The DSP board has good soundproofing characteristics and can be used for cladding external or internal walls:

• reduction in air noise level for a slab with a thickness of 10 mm is about 30 dB, for a slab with a thickness of 12 mm - 31 dB;
• reduction in the level of impact noise for slabs laid on a reinforced concrete floor - with a thickness of 20 mm is 16 dB, with a thickness of 24 mm - 17 dB;

When using additional intermediate layers, impact noise becomes quieter by another 9-10 dB. That is, frame walls covered with DSP boards block enough sound to keep the house quiet.

The best combination is a combination of cement bonded particle board and mineral wool. Mineral wool also serves as insulation, since, due to the homogeneity of the DSP, it has a low thermal resistance (it is not a thermal insulation material).

Performance characteristics

DSP boards are characterized by high vapor permeability - 0.03 - 0.23 mg/(m·h·Pa). This is about the same level as natural wood. With the correct selection of wall coverings, the humidity in the rooms will be regulated naturally.

In addition, the DSP board has high resistance to rotting. This happens due to the natural process of formation of calcium hydroxide, which is formed during the transformation of cement into concrete and alkalizes the material so that it becomes an unfavorable environment for the habitat of fungi, insects and putrefactive bacteria.

Arrangement of the floor using DSP

Let's consider the arrangement of a floor made of cement-bonded fiberboard on joists using the example of a balcony.

Step 1. A layer of insulation is laid under the logs. The logs are installed parallel to the walls at a distance of about 30-40 cm from each other.

The joists are installed on top of the insulation

Step 2. Cross bars are installed and the sheathing is created. The wooden blocks are connected to each other using metal corners and self-tapping screws.

Cross bars installed, sheathing ready

Step 3. The space between the joists is filled with insulating material.

Laying insulation

Step 4. DSP boards of the required sizes are laid across the longitudinal joists. The width of the piece of material should be slightly less than the width of the balcony (by 5-10 mm).

Laying CBPB boards

Step 5. The plates are fastened with self-tapping screws to the joists. The gaps between the DSP boards are sealed with an adhesive composition.

Fixing slabs with self-tapping screws

Video - Laying tiles on DSP

What is written according to DSP in GOST

The interstate standard states that DSP is classified as a group of highly fire-resistant building materials, which are intended for the construction of walls, ceilings, ceiling structures, ventilation ducts, flooring, window sills, surface cladding, cladding work, etc.).

Depending on the technical characteristics, there are: TsSP-1 and TsSP-2.

In addition, GOST puts forward requirements for material safety. It must be made from components containing the amount of radionuclides established by hygienic standards. According to fire safety, the material is classified into flammability groups G1 and B1. Those. characteristics must comply with GOSTs 12.1.014 and 12.3.042.