Fiber boards. Advantages and disadvantages

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Fiberboard are wood-containing building material, which is produced in the form of boards. They are somewhat similar to fiberboard and chipboard, but they differ in a much more interesting set. operational qualities and properties. This explains their wider area of use in the construction industry.

Fiberboard panels

Fiberboard (fiberboard) is a hard and dense material, for the creation of which two main components are used:

Classification

Fiberboards are classified according to their average dry density. This classification indicator is realized by assigning the corresponding brand to the plates. in Russian construction market you can buy fiberboard plates of three main brands:

F-300 - average density 260-350 kg / m3
F-400 - average density 350-450 kg / m3
F-500 - average density 450-500 kg / m3.

Other physical and mechanical properties of fibrolite:

humidity level per unit mass is 20%
thermal conductivity level is 0.08-0.1 W/(mK)
water absorption per unit mass reaches 35-40%
elasticity during bending reaches Е=300-500 MPa=3000-5000 kgf/cm2
the average strength index when working in bending is 0.5-1.3 MPa.

Existing sizes

According to the current document GOST 8928-81, fibrolite boards produced in Russia have the following geometric parameters:

length from 2400 to 3000 mm
width from 600 to 1200 mm
thickness can be 35, 50, 75 and 100 mm.

The most popular are plates having a thickness of 50 mm.

The use of fibrolite

Fiberboard found the greatest distribution in the creation of fixed formwork for monolithic housing construction, for example, in the process of building private houses of low and high storey, as well as for reconstruction or repair work. The use of fixed formwork made of fiberboards can be called the simplest, fastest and most economical method of constructing buildings. When using fiberboard plates, no lifting equipment is needed. Standard sizes plates and a small mass made the material high-tech in the process of construction work. Fiberboards are treated similarly to wood. To create curvilinear, complex-shaped structures, slabs are cut. When using fibrolite as a fixed formwork, specialists reduce the time and labor costs for construction by almost half.

Fiberboard houses can be built at a fairly low temperatures air. The high thermal insulation performance of this material makes it possible to reduce the cost of continuous heating of concrete, as well as to pour concrete on the entire floor of the building in winter period.

The fiberboard board has excellent soundproofing properties. For example, with the use of fibrolite in the construction of floors, specialists significantly increase the level of sound insulation, up to approximately 20dB. The plate acts as an excellent protector from shock and airborne noise. Thanks to unique properties fiberboard slabs it can be used as a sub-base for floor coverings from tiles to linoleum. Finish coat will not creak, rot or collapse under the influence of moisture.

The high level of moisture resistance of fibrolite boards makes it possible to use it even in damp rooms with a humidity level of up to 75%. They are also suitable for creating frameless interior partitions.

Fiberboard is used for thermal protection of buildings and structures. If you use it for two- or three-layer options in conjunction with polystyrene foam or mineral wool boards, the thermal resistance of such a fence increases significantly.

The use of fiberboard for roof construction guarantees the preparation of a plane for roofing materials, as well as complete heat and sound insulation of the roof. Fiberboard is used for reconstruction work in flat roofs 5 - 9 storey buildings. Increased fire resistance of the material enables roofers to weld roll materials on the stove with an open flame. In addition, the plates are easy to install, they can be installed under a soft roof, regardless of the season.

Advantages and disadvantages

The main advantages of fibrolite include:

increased level of fire resistance
it is flame retardant construction material
high level moisture resistance of modern fiberboard boards
increased resistance to biological agents
enough low level thermal conductivity (thermal conductivity coefficient: 0.08…0.1 W/m K)
high sound insulation performance
long period of operation (50 - 60 years)
high bending strength. Fiberboard is used to create interior partitions
small mass
ease of processing. Fiberboard is easy to cut, process. Nails are perfectly driven into it, it can be plastered
installation speed
low price.

Fiberboard houses have the following disadvantages:

destruction during prolonged exposure to the temperature and humidity conditions of use, therefore, the thermal insulation parameters also decrease. Annual cycles of freeze and thaw lead to negative consequences over time
if the manufacturer does not comply with the production technology, saves on something, then the material will be affected by fungi. Always ask the seller for a quality certificate.

Fiberboard sip panels

Today, an innovative product occupies a worthy place in the construction market: a SIP sandwich panel using fiberboard called Green Board. The panel has three layers:

one layer of polyurethane foam insulation
two fiberboards.

Such panels are used in the process of creating internal and external walls, stairs, partitions, as well as load-bearing structures. In addition, such material is quite in demand in the construction of cottages, baths, garages, outbuildings and gazebos, attic outbuildings in finished buildings made of wood, brick, concrete.

Such sip panels are environmentally friendly and safe, they are also called “improved wood”. Moreover, the cost of such a building is almost the same as the use of SIP panels with OSB, but the durability will be higher.

Fiberboard GREEN BOARD as part of a sip-panel provides the following advantages:

complete environmental friendliness, which is guaranteed by the absence of toxic compounds in the manufacturing process of GREEN BOARD
increase in the period of operation of the entire structure of the building due to the increased level of durability of GB-3 boards, which reaches over 100 years. Exceptional innovative technologies enable the material to increase its mechanical properties throughout the entire period of operation.
boards GB-3 have a fire safety class G1, which is assigned to slow-burning materials. As a result, the overall fire safety of the building increases. Note that OSB board belongs to class G4, which is assigned to highly combustible materials
the use of GREEN BOARD fiberboard in SIP panels increases the level of ventilation of the entire building. This indicator is similar to wooden buildings. Fibrolitny boards differ in special system of regulation of humidity in rooms
improving the biological stability of the building. The material from which GB-3 boards are made, even in a humid climate, does not rot, therefore, fungi, pathogenic bacteria, rodents and insects will not multiply there.

Fiberboard GREEN BOARD according to GOST 8928 is created by pressing a mixture specially prepared on wood-wool shaving machines according to GOST 5244. Chip parameters:

length 400-500 mm
width 4-7 mm
thickness 0.25-0.5 mm.

Portland cement grade not lower than 400 according to GOST 10178, as well as chemical additives such as calcium chloride, liquid glass, lime, aluminum sulfate and water are added to the chips.

Fiberboard production

How will fibrolite turn out frame house, depends on the quality of the plates. Consider the production process for the manufacture of such plates.

The technological process of automated creation of fiberboard on Portland cement includes the following steps:

open the longitudes into churaks
making wood wool
treatment of wood wool with a mineralizer - a solution of calcium chloride or liquid glass
mixing wood shavings with cement
plate molding and pressing
heat treatment (hardening and drying of boards). In winter, churaks are placed in special chambers for thawing before planing.

Chips can be produced on SD-2 wood wool machines, which are produced by the domestic industry. The level of productivity of such devices, depending on the thickness of the chips in 8 hours, reaches:

with a chip thickness of 0.05 mm - 330 kg
with a chip thickness of 0.1 mm - 705 kg
with a chip thickness of 0.25 mm - 1800 kg
with a chip thickness of 1 mm - 5350 kg.

The output of wood wool from 1 m3 of raw material is from 300 to 350 kg, if the chip width is 4-5 mm, and the thickness is 0.25-0.5 mm.

A number of designs of machines for mixing chips and cement have been developed. Most of them work dry. The mixing device carries out the work of sieving the chips from the fines and impurities, evenly impregnates it with calcium chloride and feeds the mixture into the mixing drum, where the chips and cement are further mixed. Cement from the tank enters the mixing drum with the help of a bucket elevator, the drive of which has a gearbox. Due to the change in speed, an accurate dosage of cement is carried out. For more comfortable work machines are equipped with a vacuum cleaner - a filter that removes the dust generated during the transportation of chips. The solution that drains after impregnation is collected in a tank and pumped back into the bath using a pump.

A fully prepared mixture of cement and chips from the mixer is fed into the molds and distributed evenly over its entire area.

The design features of the molds guarantee the possibility of batch pressing of plates and the preservation of pressed plates for a long time in a clamped position.

Presses of any design can be used for pressing boards, which guarantee the possibility of holding the pressed pack of boards under conditions of maximum pressure for the time necessary to fix the boards in a clamped position. Pressure options:

0.1 - 1 kg/cm2 for pressing boards of grades 300 and 350
1.5 - 4 kg / cm2 for pressing plates of grades 400 and 500.

Boards left in molds may cure naturally or artificial conditions. Natural curing takes place in indoors in conditions of air temperature from 18 to 20 ° C. This process lasts about two days. Artificial hardening is carried out in special chambers at a temperature of 30 to 40 ° C and an air humidity of 60 - 70%. This process takes 12 to 24 hours. Fully cured boards are demoulded and dried under natural or artificial conditions.

Natural drying is carried out in a well-ventilated area. In the summer, you can simply dry under a canopy. This process takes approximately 10 days. Artificial drying is carried out in special chambers under the condition of intensive air exchange at a temperature of 60-70 ° C and an air humidity of 60-70%. This process takes 12 to 24 hours.

Today, more and more preference is given to multifunctional materials that perform several functions at once. Fiberboard, the characteristics of which can rightfully be called impeccable, are universal material used for both floor and wall cladding and heat and sound insulation premises, construction of partitions and even the construction of fixed formwork.

Properties and characteristics of fiberboard boards

Fiberboard, the production of which is regulated by GOST 8928-81, contains Portland cement as the main connecting element, which accounts for about 40% of the composition.

Cement is mixed with a filler in the form of coniferous wood shavings, also called wood wool. The length of the chips can reach 5 cm, and the thickness is 5 mm.

Wood wool accounts for about 60%. Its main goal is to reduce the weight of the material and provide low thermal conductivity.

Also, chemical additives are added to the resulting mixture of chips and Portland cement in the form liquid glass, calcium chloride, lime, etc. Direct production of the material is carried out by pressing.

Kinds

Fiberboard slabs GOST 8928-81, depending on the scope of application, are classified into grades:

F-300. Found their application as a heat insulator.
F-400. Recommended for soundproofing and construction of heat-insulating and structural partitions, barriers, etc.
F-500. They are used as soundproofing and structural and heat-insulating materials.

The degree of density and strength gave rise to the following gradation:

GB1 - low density fiberboard,
GB2 - with average density and strength indicators;
GB3 - with high density and strength;
GB4 - combined (layered) fiberboard, the production of which is carried out by alternating layers with high and low density;
GB1L - endowed with minimum density values;
GB3F is a combined fiberboard with high density, additionally decorated with a coating.

Brand Comparison

Fiberboard characteristics have slightly different characteristics, distinguished by brand:

Fiberboard plates, the price of which ranges from 390 to 2000 rubles. depending on the density and dimensions, they have standardized geometric parameters.

The length can be 240 and 300 cm, width - 60 and 120 cm, and thickness - 3, 5, 7.5, 10 and 15 cm. However, GOST 8928-81 allows the production of products with other parameters, previously agreed with the consumer. Therefore, heavy-duty samples with a density of 600, 900 and even 1050 kg / m 3 can also be found on sale.

Advantages of fiberboard boards

A special role is played by the ability to soundproof the room. Fiberboard allows several times to reduce the intensity of incoming and outgoing noise. Moreover, he is able to protect households not only from impact noise, but also air noise effect.

Along with this, fibrolite boards are distinguished by heat-saving characteristics due to the low coefficient of thermal conductivity, which ranges from 0.08-0.1 W / (m∙K).

Thanks to this property, the material can be used as a good supplement to already existing system heating with the possibility of reducing heating costs.

Fiberboard boards, the use of which is possible both for external and internal use. The material is easy to machining, which greatly simplifies the task. home master and reduces repair time.

In addition, high bending strength makes it easy to erect interior partitions. And their lightness, in comparison with concrete, facilitates the work and does not create an additional heavy load on the walls.

The main advantage of fiberboard in comparison with wood-cement analogs is its high moisture resistance. Fiberboard can be exposed to moisture an unlimited number of times, getting wet at the same time and drying quickly enough, retaining the structure.

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Fiberboard, the production of which is not characterized by the use of harmful phenolic or formaldehyde resins, belongs to environmentally friendly materials. It has high fire resistance, refers to slow-burning materials.

The fibrolite was awarded classes G1, V1, T1, D1, RP1, which indicates low combustibility, low flammability, non-toxicity with minimal smoke generation and inability to spread flame.

Another feature is the ability to control the humidity in the room. This effect is achieved due to the loose structure of the material, which absorbs excess moisture and releases moisture when it is deficient. Thus, comfortable microclimatic conditions are established. Service life can reach 60 years.

For fiberboards, the price in most cases is even lower than the cost of the currently popular internal finishing materials(in particular GKL, chipboard, fiberboard, LSU, OSB, etc.).

Flaws

Fiberboard also has several disadvantages:

Susceptibility to fungal attack when using the material in excessively damp areas. The recommended humidity value for fiberboard application is 75%.
Relatively large mass, compared to wood-based panels or drywall. The weight of the plate ranges from 12 to 55 kg, depending on the density and geometric parameters.

Fiberboard, the use of which is not limited to internal use, great alternative the usual drywall and chipboard. At the same time, the set specifications fibrolite not only does not concede, but, on the contrary, surpasses the indicators of GKL, chipboard and fiberboard.

At present, fibrolite boards are experiencing a “second birth” thanks to the lines of the Dutch company ELTOMATION BV, which has implemented the technology of the Austrian company Heraklit.

Specificity of wood boards produced on the equipment of a Dutch company Eltomation, consists in the use of wood in the form of wood wool, ensuring the uniformity of its wetting, mixing with cement and laying wool fibers in the slab. At the same time, the indicators of the width and thickness of wood fibers, the level of their wetting and content constituent parts fiber mat are specified and strictly controlled. During the production process, the laying of wool fibers in the slab is carried out in a strictly horizontal plane. EFFECT: obtaining a material of a given density, in its wide range. Wood particles enter in the form of wood fibers (wood wool). At the same time, their length reaches 250 mm, the width is set in the range from 1 to 8 mm, the thickness is from 0.1 to 0.4 mm. Long fibers, when they are evenly laid in a strictly horizontal plane, provide a decrease in the cement content in the material without a significant deterioration in the properties imparted to the material by cement.

Long fibers of wood wool, evenly laid in a slab in a strictly horizontal surface, allow you to get not only a traditional low-density fiberboard, but also a medium- and high-density fiberboard on one technological equipment. To obtain fiberboard of various densities, not only the horizontal laying of wood fibers is very important, but also the uniformity of their laying on the slab.

Types of wood-cement materials

Wood-cement materials are a type of lightweight concrete in which wood acts as an aggregate. Depending on the form of the aggregate (chips, shavings, wood wool), as well as the ratio of the parts of cement and aggregate, the physical and technical characteristics of the material change. There are three types of wood-cement materials.

1) Cement particle boards - pressed boards based on compressed wood shavings (crushed wood chips, forestry waste) treated with a binder (cement).

2) Wood chip slabs - slabs consisting of 95% mineralized wood chips and cement.

3) Cement Fiberboard (WWCB) trademarks"Fibrolit", "Heraklit" (Austria) and "Zidarit" (Bulgaria) - a heat-insulating building material obtained by forming plates from a mixture of so-called wood wool, a binder (Portland cement, white cement) and a neutralizer (liquid glass).

Areas of use

According to the European practice of WWCB, boards have the following consumption structure:

WWCB consumption structure in Europe

Purpose	Share, %
Fixed formwork systems

SIP panels
Internal partitions
Roof, floor, wall decoration

In Russia, the use of such plates is regulated by GOST 8928 - 81.

Low density boards are used as a heat-insulating, structural-heat-insulating and acoustic material in building structures buildings and structures with relative air humidity not higher than 75%.

Medium Density Slabs as soundproofing roads, fixed formwork.

High density slabs as fencing and structural material of buildings and structures.

In Russia, WWCB boards are just entering the construction practice. The level of the plates is negligible. The structure of consumption most likely reflects the efforts of manufacturers to market this innovative product.

Panel-frame housing construction

SIP panels

Fiberboard slabs are a heater used in the construction of buildings and structures, as well as in interior decoration. This wood chip material has become very popular in Lately, which was made possible thanks to enough low prices on products and numerous advantages. In the article, we will take a closer look at where such a heater can be used, learn about its key features, forcing consumers to make a choice in favor of fiberboard.

Fiberboard slabs - general information about the material

Fiberboard - what is it? Along with modern artificial materials suddenly appeared new material for warming the room. In fact, this insulation has been known for a long time, because more than a century ago people used similar plates, creating them manually from clay, straw and bricks. We can safely say that fiberboard is an ideal confirmation of the phrase that everything new is a well-forgotten old.

The name of the product has its origins in Latin. Literally, the word "fibrolite" can be translated as "fibrous stone". It is unlikely that it will be possible to more accurately describe a plate made of fiberboard. It is environmentally friendly and safe material, the production of which is carried out from several main components - high-grade Portland cement, liquid glass and natural wood shavings. Easy to manufacture and use, as well as very practical, the panel is gradually conquering the construction market, because the material has many advantages, while its price pleasantly surprises.

Each component from which fiberboards are made deserves a more detailed explanation:

1. Portland cement - in this context, cement plays a role binder. In percentage terms, it accounts for exactly one third. Cement is necessary here to give the plates such important properties as strength, strength, reliability, wear resistance. The material must not only serve for a long service life, but also retain all its qualities during delivery, transportation, and storage.
2. Wood chips or wool - the basis of the plate. Its share is almost two thirds of the total volume of the plate. In production this insulation leading companies use natural wood shavings up to 5 cm long and 3-4 mm thick. The use of wood chips is necessary to increase the level of thermal conductivity of the coating.
3. Liquid glass is a kind of diluted clerical glue, which is scientifically called low concentration sodium silicate. The main task of liquid glass is to isolate wood shavings from moisture. As a result, fiberboard can cope with increased levels of humidity. True, only for a short period of time. Long-term operation of the heater in conditions high humidity may lead to its destruction.

Fiberboard - the main types and scope

Today, fiberboard insulation is widely used in various fields of construction. However, most often this material can be found in fixed formwork in monolithic housing construction. Repair and reconstruction of buildings and structures, as well as construction multi-storey buildings rarely does without fiberboard plates.

The reason is that fixed formwork made of fiberboard is the most economical, fastest and in a simple way building construction. The small weight of the plate, as well as their standard dimensions, allow you to work even without the use of additional lifting equipment. Among other things, it is very simple to work with plates; even a person inexperienced in the art of building can finish the room with fiberboard.

Processing is almost the same as processing ordinary tree, the same applies to the necessary tools in the work. As practice shows, the use of wood-chip insulation with the addition of cement as a fixed formwork allows several times to reduce labor costs and time for the construction of structures.

Fiberboard is often used for the construction of fixed formwork.

Note that depending on the scope of application, fibrolite boards may differ in the density of the material structure, as well as in size. The following are the most popular brands of goods that are widely used by modern craftsmen:

Fiberboard with low density (570 kg/m3) is an excellent insulation that can be used as a sound insulator when finishing interior spaces in a private house or apartment
Material with an average density (800 kg / m3) - such a product is more often used as enclosing structural elements, although it is also great for soundproofing
Plates with high density (from 1400 kg/m3) have found application in complex protective structures, where a high bearing density of the material is required.

Fiberboard board can be used in construction even at low temperatures, which is due to the excellent performance of the product in terms of thermal insulation. This also makes it possible to significantly reduce the costs associated with heating concrete during construction during cold periods. In addition to thermal insulation, the plate is distinguished by soundproofing qualities. The use of the material as an insulator allows you to improve the level of sound insulation in any room of your apartment. Fiberboard does not creak and does not deform under heavy loads, even for a long time, due to which it is very often used as a base for floor coverings for linoleum and even ceramic tiles.

Modern fibrolite boards boast excellent moisture resistance, due to which they can be used in rooms and premises with humidity up to 75%. Unfortunately, not all grades of fibrolite differ in similar indicators, moreover, the cost of moisture-resistant material is an order of magnitude higher than conventional goods.

Why fiberboard has become popular - the advantages and disadvantages of the product

Despite the fact that the insulation produced on the basis of wood shavings, cement and liquid glass has only recently appeared on the construction market, it has already managed to become one of the most popular and sought-after heaters and insulators. This is facilitated by a huge number of positive aspects, the most important of which are:

Environmental safety of products - two-thirds of the fibrolite consists of natural wood which already says a lot. Cement, like glass, does not emit harmful and toxic substances, so you can safely finish the premises in the apartment without the risk of harming your family and friends.
Durability - long service life is ensured by the optimal combination of impact-resistant cement and elastically deformable wood chips. The market for synthetic building materials will no longer be able to offer similar products with the same performance.
Resistance to deformation and movement - again, everything is provided by the right ratio of cement and wood, where cement gives the product the necessary strength, while wood wool plays the role of a kind of damper.
Sound and thermal insulation - standard fiberboard required thickness will completely silence noisy neighbors while creating a comfortable temperature in the room.

This is not all the advantages of the material, because one can also note such important qualities as the ease and convenience of laying plates, a small coefficient of expansion of the plate, and much more. It is not surprising that consumers are trying to purchase fiberboard insulation, since with a huge number of advantages, the product has very affordable prices.

However, there are also some disadvantages that cannot be ignored:

1. As already noted, slabs do not do very well with high humidity because it contains wood. In addition, constant temperature fluctuations can adversely affect the quality of the product, accelerating the deformation of the plate, which in the future can lead to its complete destruction.
2. Another problem arising from the presence of wood in the composition is the susceptibility to mold and other fungi. During the initial laying, it is necessary to thoroughly dry the surface on which the slab will lie. The fibrolite itself can be treated with various antiseptic compounds, which will increase the service life of the material.
3. Weight of fiberboard panels - this factor can be considered from different points of view. For example, ordinary wood-based panels have a slightly lower weight, but compared to other building materials, including concrete, fibrolite is about 4 times lighter. This eliminates the use of various special equipment to work with heavy loads at a construction site.

So feel free to buy fiberboard insulation. It will please you with a long service life, as well as many positive qualities, which completely outweigh some negative sides. In addition, the price is very low compared to other materials, which is an absolute plus.

Fiberboard, as a building material, began to be used in the late 20s of the twentieth century and, in essence, has much in common with wood concrete.

● For the manufacture of fiberboard required water, Portland cement, liquid glass (or technical calcium chloride) and wood shavings - a tape half a meter long. The presence of a tape, and not sawdust, distinguishes fibrolite from wood concrete. It is the use of this wood tape that makes it possible to achieve high characteristics in terms of compressive and bending strength. Tapes are impregnated with a solution of liquid glass or calcium chloride. The prepared raw material is pressed into special forms and then dried. The density of the finished fiberboard is about 0.25-0.5 t/m ³ .

● Finished fiberboard slabs have standard geometric characteristics:

Length - 2400, 3000 mm;
width - 600, 1200 mm;
thickness - 30, 50, 75, 100, 150 mm.

● Depending on the density of the fibrolite in a dry state, it is divided into three grades:

Heat-insulating F-300.
Heat-insulating and structural F-400.
Soundproof F-500.

● Fibrolite slabs are widely used in fixed formwork in monolithic construction: construction of private residential buildings with a small number of storeys; during works on reconstruction or repair of structures. When using fiberboard on construction site no need to place any lifting equipment. Light weight and well-known dimensions of the plates allow to reduce the complexity of technological processes. In order to create curvilinear complex shapes, ordinary cutting of fiberboard plates is made.

● Construction works with fibrolite possible at fairly low temperature conditions- the material has high thermal insulation qualities, which reduces the cost of constant heating of concrete when concrete work in winter.

● Due to the fact that fiberboard has good sound insulation characteristics, it can be used in the construction of floors and this will increase the degree of sound insulation of the room. Moreover, fiberboard plates protect not only from shock, but also from air noise effects. Also, fiberboard slabs can be used as a sub-base for a fine floor covering.

● Fibrolite slabs are used in the construction of the roof - they provide not only the preparation of the plane for the roof, but also improve heat and sound insulation in general. Simplicity installation work allows it to be used soft roof regardless of the time of year.

Fiberboard is used in the reconstruction of old roofs in standard high-rise buildings, and a high level of fire safety allows welding roll coatings on the stove with an open flame.

● Due to the unique properties of fiberboards, they can be used in the construction of frameless interior partitions.

High fire resistance. Fiberboard slabs are fire-retardant materials.
Low thermal conductivity - the coefficient of thermal conductivity is 0.08-0.1 W / (mˑ K).
High moisture resistance of fiberboard plates.
Good soundproofing.
High biological resistance (for material manufactured using modern technologies).
Fiberboard slabs are easy to machine, which is convenient not only for driving nails, but also for finishing work.
High bending strength, which allows the use of fibrolite boards in the construction of interior partitions.
The possibility of using fibrolite in combination with concrete, brick, wood.
Low weight - fiberboard is four times lighter than concrete.
High transportability of the material.
Acceptable cost.
The ease of installation of fiberboard allows you to reduce the time of construction work.
The long period of operation - service life makes 50-60 years.

● Provided that the fibrolite is exposed to temperature and humidity conditions during operation, it can break down within a short period of time, which will significantly reduce thermal insulation characteristics. As the freeze/thaw cycle increases, the negative processes in the material will also increase.

● Fiberboard produced by old technologies is prone to fungus infection. Therefore, it is better to exclude the use of fibrolite boards in the construction of structures associated with a humid operating environment. Fiberboard should be used in rooms with a relative humidity of not more than 75%.