Fireproof plasterboard GKLO: characteristics

Che Guevara
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Che Guevara November 22, 2016

Fire-resistant drywall from Lafarge.

In rooms with increased fire safety requirements, fire-resistant plasterboard can and should be used. In the article I will look at its main characteristics, show you how to choose the right non-flammable drywall, and also talk about its areas of application and installation features.

Description of fireproof plasterboard

Fire-resistant gypsum board is produced in pink color.
The density of the material is greater than that of standard plasterboard sheets and is 850 kg/m³. Fire-resistant gypsum plasterboard conducts thermal energy less, its thermal conductivity coefficient is 0.22 W/(m·K), and that of a simple one is 0.35 W/(m·K).

Other characteristics of heat-resistant plasterboard:

flammability group does not exceed G1;
smoke generation indicator - D1 (produces a small volume of smoke);
flammability - B1 - B2;
toxicity category - T1 (no toxic components are released when heated to high temperatures).

The side edges of the sheets are finished with construction cardboard, as are the working surfaces. The material is impregnated with a fire retardant, and the edges are always made semicircular and thinned in order to reliably putty the joint during subsequent finishing.

Sheets 1.5 - 3.0 m long and 1.2 - 1.5 m wide are produced in 12.5 or 15 mm thickness.

For what purposes would fire-resistant gypsum board be used?

Boiler room cladding 33.33%

Separate areas in the kitchen 33.33%

In any living rooms 33.33%

Voted: 3

Structure providing fire protection qualities

Unique fireproof plasterboard has the best technical characteristics in standard sizes. The weight of the sheet usually does not exceed 30 kg. Modern material is presented on the market in rectangular slabs, which include a core of hardened gypsum mass and high-density multilayer cardboard.

The composition of the gypsum core during manufacturing includes the following components:

two layers of soft mineral in the form of gypsum dihydrate;
fibers in the form of glass threads that do not tear or break, but bend without destruction;
fire-resistant substances in the form of an additional clay layer;
crystallized water.

Advantages of heat-resistant drywall

The value of the cladding is in the fire resistance of gypsum plasterboard, so experts recommend that the interior decoration of the house be done with just such sheets in case of fire. The material will help to extinguish the flame and will not collapse within 25 minutes. Conventional gypsum plasterboards are capable of containing fire for only a few minutes due to the non-flammable gypsum core.

Advantages of the material

The layer adds almost no weight to the structure. Additionally insulates from noise. Thermally insulates the room. Harmless to health. With a smooth surface to suit any decor.

Where is it used?

Fireproof plasterboard has a fairly wide and varied range of uses. He performs well in each of them:

A ventilation duct is often made and assembled from it. At the same time, since the material is not able to withstand strong, long-term heating, it is not used to construct a chimney box;
Sheathing is made from it. For example, for a Finnish, Russian or Turkish bath;
Fireplace portals can be formed from heat-resistant plasterboard. In this case, the material acts as insulation and protects the fireplace firebox from heat, and does not allow you to get burned when using or touching the heating device;
With its help, they can perform cladding of a workshop whose work is aimed at light industry.

If you plan to assemble a portal from heat-resistant plasterboard, you need to take note of several important rules:

You should not create a portal for a fireplace, the surface of which is already finished with tiles, natural or artificial stone. All these materials initially have high fire resistance and act as protection on their own, requiring no additions. In most cases, a plasterboard portal is required for cast iron and steel fireboxes, which tend to get very hot and hot;
The best option for a plasterboard portal is its use for built-in combustion chambers. Decorating such a niche is much safer and easier than a wall or corner option;
In order for the plasterboard sheathing to be as safe as possible and not to overheat or melt, it is necessary to leave special gaps between it and the firebox, a small space that allows the circulation of hot and cold air currents.

When buying such a material, even with all its non-flammability, you should not even closely compare it with brick or stone. Although drywall is able to withstand strong heat, not melt, and not ignite, if exposed to a fire source for a long time, it will sooner or later ignite and cause a fire.

Does drywall burn?

Different types of drywall have different fire-technical characteristics, so one type of drywall can be confidently considered fire-resistant, while the other is still a flammable material.

It's easy to understand: do a simple analysis. Regular drywall consists of gypsum and cardboard. Gypsum is a material that will not burn, but is only subject to destruction over time of burning. But cardboard can burn, but even then it is too tightly connected to the gypsum core, there is no air between this connection, so the cardboard will not burn, but will char.

Drywall is a highly environmentally friendly material, so when charred, no harmful substances will be released into the air.

Why then buy gypsum plasterboard, drywall with fire-resistant characteristics? It's simple - it resists open fire much longer.

Heat resistance of gypsum plasterboard

Exterior finishing

Since the appearance of the surface of drywall and its structure is quite simple and monotonous, the surface is often decorated with various materials. One of the budget options is ceramic tiles. It has good fire resistance, and the fastening technology is quite clear and simple even for a beginner.

The tiles are fixed to the fireplace portal using a special glue on a fire-resistant basis. Thus, quickly and simply you get quite interesting and stylish decor.

Before you buy fire-resistant drywall, pay attention not only to its characteristics and cost, but also to the manufacturer itself. It is important to give preference only to proven ones. Today you can buy products from the following brands on the market:

Velma;
Knauf;
Lafarge.

Also, before thinking about the frame itself, we recommend purchasing a firebox. The fireplace portal is assembled in such a way that it is strong enough, stable and can withstand the weight of the selected electric or bio fireplace.

If you want to assemble a false fireplace from plasterboard with your own hands, in the hearth of which a real fire will not burn, it is quite possible to make do not only with flammable material, but also with other coverings, such as plywood, wood, cardboard, boxes.

Heat-resistant plasterboard is more suitable for electric fireplaces, since such fireboxes do not heat up very much or have no heating function at all and serve a decorative role. Also, if high-quality and thoughtful sealing is performed, a portal for a bio-fireplace can be assembled from this material. In this case, the surface must be insulated and located at a safe distance from the burner with fire.

You should not decorate a wood stove or fireplace with plasterboard, even if it is heat-resistant. Such foci are the most powerful and very hot. Even a remotely located and isolated structure will be unsafe from a fire point of view. For wood-burning fireplaces and stoves, it is best to assemble a portal or line it with brick, artificial or natural stone (marble, granite or sandstone).

You can also decorate the surface of the fireplace frame with more budget-friendly claddings, such as: decorative plaster, which can be purchased in a certain shade and with the required texture. An inexpensive coating is heat-resistant paint.

In the video presented below, you can learn in as much detail as possible how to assemble a fireplace or portal from plasterboard that is fireproof and heat-resistant to temperature changes:

Is drywall flammable or non-flammable?

All building materials are divided into two main groups: non-combustible (NG) and combustible (G). To qualify as non-combustible, the material must meet a number of requirements that are imposed on it during the testing process. A sheet of drywall is placed in an oven heated to a temperature of about 750 ° C and kept there for 30 minutes. During this time, the sample is monitored and a number of parameters are recorded. Non-combustible material must:

increase the oven temperature by no more than 50 °C
give a steady flame for no more than 10 s
decrease in weight by no more than 50%

Plasterboard sheets do not meet these requirements and are therefore classified in group G (flammable).

Application area

Drywall of this type is often used for interior decoration of walls and slopes. It fits well into the interior when creating false fireplaces. High environmental friendliness allows the material to be used in children's rooms and in the kitchen.

One of the main reasons why drywall is used for interior work is its “naturalness,” that is, complete environmental friendliness.

Before purchasing this brand of drywall, it is important to know that the reinforced core inside the product complicates the installation work to install the product. For high-quality work, special screws will be required.

However, you need to know that the weight of this drywall is higher than that of ordinary

For high-quality work, special screws will be required. However, you need to know that the weight of this drywall is higher than that of ordinary drywall.

This material is suitable for creating niches on walls, installing suspended ceilings, and in cases where you need to create special partitions between rooms. Drywall is often a special frame on which a layer of plaster or paint will subsequently be applied.

Drywall with fire-resistant properties is often used in areas such as:

Boiler rooms or boiler rooms. This material is often used in rooms where there is elevated air temperature.
For arranging fireplaces.
Children's rooms.
Premises with high traffic.
Finishing of buildings with high strength.
For partitions in public institutions.

Drywall Knauf

Knauf plasterboard sheets are one of the most durable materials in terms of resistance to open fire.

The material is made of cardboard and gypsum, treated with special compounds designed to resist fire. During manufacturing, the core is reinforced with cardboard on both sides. The surface of the sheets is smooth with increased strength.

This material was produced in such a way that after exposure to fire it can only char, and the substance contained inside will form an additional barrier to fire.

Manufacturers have improved the product to a fire resistance limit of 60 minutes. When exposed to tongues of fire, the material is not susceptible to emitting odor and smoke. You can distinguish the Knauf company by the color scheme of their products. Moisture-resistant drywall is available in green, regular drywall is gray, and fire-resistant drywall is pink.

The composition contains reinforced fiberglass, which gives the product additional stability. Gypsum provides additional protection from fire. Knauf has a number of advantages over other manufacturers due to the properties of their products and qualities such as:

the material is distinguished not only by its ability to contain fire, but also by its moisture resistance;
the core contains crystallized water, which in the event of fire acts as an additional deterrent;
due to its environmental properties, this material is suitable for all types of premises;
the presence of a clay layer provides additional thermal insulation;
The service life of such a product is five years longer than conventional drywall.

The Knauf company defines the material as heat-resistant based on its degree of flammability, so the risk group for fire of such a product is minimal.

Knauf drywall has a special certificate confirming its safety from an environmental point of view.

With the use of plasterboard of this brand, you can feel protected not only from open fire, but also from harmful fungus, which often affects the surface of the walls in the room.

Another distinctive property is that it does not evaporate odor and does not conduct electric current even if it is abundantly filled with moisture.

Fire resistance limit

The duration of the fire resistance limit determines the time during which the material will not be subject to destruction under the influence of open fire. The manufacturer indicates this limit with a number, which will indicate the time of resistance to open fire.

For heat-resistant drywall, this mark is designated as number 25. From the start of combustion of the material to the process of its destruction, 25 minutes can pass.

Even ordinary sheets of plasterboard can contain open fire for several minutes thanks to the gypsum layer, which is not subject to combustion.

In order for the material to be fire-resistant, double partitions are made in it, and cardboard is placed in the middle.

Rules for choosing fire-resistant material

When purchasing products, you need to pay attention to the following nuances:

Availability of certificates. These documents confirm that the products comply with the declared characteristics.
Appearance. The cardboard layer should be uniform, without cracks or deformations.
Marking. Designations must include the manufacturer, name - gypsum plasterboard, type of edge, dimensions, temporary indicators of fire resistance, as well as the standard according to which the manufacture was carried out.
Brand. It is better to trust trusted brands that have proven themselves in the construction and finishing materials market. This is especially true if there is no confidence that a cheaper, unknown option meets the stated parameters, even if there is accompanying documentation.

A trusted brand is, of course, a certain guarantee of the quality of fire-resistant products, but do not forget that this is the type of drywall that is most often counterfeited

Compliance with storage conditions is also important. If possible, ensure that the sheets have been placed in a low humidity area in a horizontal position on the correct backing.

Gypsum fiber sheets

Gypsum fiber sheets and other products can be purchased at Leroy Merlin in Moscow at low prices. Select the product you are interested in on the website and buy it in our online store. The range of products presented in the catalog is extremely wide. Among them there will certainly be a position suitable in all respects.

All products presented in the “Gypsum fiber sheets” section are produced by well-known companies that have proven themselves to be of high quality for their products.

You can always place an order and pay for it online on the official website of Leroy Merlin in Russia. For residents of the Moscow region, we not only have low prices for goods in the “Gypsum fiber sheets” category, but also fast delivery to cities such as Moscow, Balashikha, Podolsk, Khimki, Korolev, Mytishchi, Lyubertsy, Krasnogorsk, Elektrostal, Kolomna, Odintsovo, Domodedovo , Serpukhov, Shchelkovo, Orekhovo-Zuevo, Ramenskoye, Dolgoprudny, Pushkino, Reutov, Sergiev Posad, Voskresensk, Lobnya, Ivanteevka, Dubna, Yegoryevsk, Chekhov, Dmitrov, Vidnoye, Stupino, Pavlovsky Posad, Naro-Fominsk, Fryazino, Lytkarino, Dzerzhinsky , Solnechnogorsk, Istra and Zhukovsky.

Rules for installation and installation of fire-resistant plasterboard

Covering the ceiling of the room with gypsum boards. Fire-resistant plasterboard is used as a finishing or structural material for installation inside the building. Finishing is done both in horizontal and vertical planes - it can be installed on walls, ceilings and inclined planes.

As a structural material for partitions, the risk of fire spread is reduced by 2 times, and if the filling of voids is made of mineral wool, then the fire resistance of such a bulkhead will increase even more.

For installation, the usual technology of fastening to metal profiles using self-tapping screws is used. During installation, a standard scheme is used, taking into account the specifics of the edges of the sheets. The table of product parameters on the manufacturer’s website will help you choose the right edge facet. Here you can also watch videos of editing techniques and see how to work with the material.

Calculation of the amount of materials required for installation can be done either in the usual way or using a calculator - the dimensions of all sheets are standard - 1200x2500 mm.

But a specific technique for increasing the fire safety of a room is the installation of panels in 2 layers. The first layer is installed on the profile frame, and the second layer is attached on top of it using self-tapping screws and heat-resistant mounting adhesive.

Installation nuances

Fireproof plasterboard is manufactured to resist fire , and there is virtually no risk of flammability, but experts recommend adhering to the following rules when covering floors with a wooden structure:

before starting work, rack profiles are installed around wooden floors;
profiles are sheathed with gypsum plasterboard sheets;
a special tape is laid in the space between the walls;
joints in the corners are covered with metal corners;
When creating additional insulation of plasterboard sheets, it is carried out with mineral wool material.
The installation process is allowed on metal products that make up the rack profiles.

When carrying out installation work, it is recommended to use self-tapping screws as a fixation for sheets. The distance between fastening elements should not be more than 0.2 meters.

If there are vertical communication shafts in the room, they must be additionally insulated with special non-combustible materials. Craftsmen often use foil-coated mineral wool for such purposes.

Organizational benefits

“Dry” construction refers to a method of installing heavy-duty material in which the need for various liquid mixtures (including putties and special solutions) is completely eliminated. Sheets of fire-resistant gypsum fiber board belong to just such a structure, thanks to the use of which it is possible to achieve several organizational advantages.

The time required for all construction operations is significantly reduced, since there is no need to wait for mixtures diluted to a liquid state to dry. Utility elements can be placed behind the gypsum plasterboard slabs. It is possible to work with dry material at almost any time of the year, including the winter season with sub-zero temperatures.

Upon completion of installation and repair work, cleaning the areas is reduced only to clearing them of small remains of dry debris (there is no need to use “wet” methods). The low weight of fire-resistant GVL blanks allows only two people to work with them, and workpieces that are small in size and weight can be handled by one worker.

And finally, in the case of using GVL, the pressure on the load-bearing parts of any structure is significantly reduced, which is especially important when organizing multi-story construction. It is worth noting that fire-resistant gypsum board is more expensive than conventional gypsum plasterboard, but this difference in price is compensated by reliability and safety

GVL does not require additional processing or putty to obtain fire-resistant characteristics - it is initially non-flammable. The material does not crumble and can withstand high loads

It is worth noting that fire-resistant gypsum plasterboard is more expensive than conventional gypsum plasterboard, but this difference in price is compensated by reliability and safety. GVL does not require additional processing or putty to obtain fire-resistant characteristics - it is initially non-flammable. The material does not crumble and can withstand high loads.

Characteristics of GKLO

Product technical parameters:

Flammability class - G1. The material is completely protected from the spread of fire.
Toxicity – T1. Products in this group do not pose a threat to human health or domestic animals.
Smoke spread - D1. There is no curtain that makes breathing difficult.
Flammability – B3 (less than 20 kW/m2).
Density – from 850 kg/m3.
Thermal conductivity – 0.22 W/(m K).
Environmentally friendly. The products contain no substances that may contribute to the development of allergies or any diseases.

Table of technical parameters of different types of drywall
These parameters are enshrined in regulatory documents, all manufactured products must comply with them.

Characteristics and requirements for materials

The technological characteristics of gypsum plasterboard/GSP are the same - it is a base of sifted, finely ground gypsum raw materials, purified from impurities, formed into a single mass with the addition of water, various binding additives, including those special for certain types of commercial material, between two layers of dense, capable of resistance , paper cardboard:

Reducing hygroscopicity - for moisture-resistant varieties.
Solid mineral additives - for types with increased strength and surface hardness.
Fireclay clay, non-combustible mineral fibers - in fire-resistant types of plasterboard/gypsum building board.

An important characteristic when ordering/delivering, for transportation, construction and installation work is the standard sizes of finished commercial products:

For GKLO, GKLVO. Width – 0.6 and 1.2 m; length - from 2 to 4 m in increments of 50 mm, thickness - from 6.5 to 24 mm.
For GSP-DF, width – from 0.6 to 1.25 m; length - from 1.2 to 2.5 m, thickness - from 9.5 to 15 mm.

Fire characteristics of fire-resistant cardboard, like all other types of gypsum boards, according to GOST:

GSP/GKL belongs to the flammability group G1 - flammable, with zero ability of independent combustion: in terms of smoke generation ability - D1, in terms of flammability: GSP - B2, GKL - B3.
Resistance of GKLO, GKLVO to fire should be at least 20 minutes.
Classification of gypsum boards and GSP into a less fire-hazardous group is possible only on the basis of appropriate tests of samples of serial products of a specific manufacturer.

Conclusions: the name commonly used by designers, builders, and finishers in relation to this material is more of an advertising nature, because the fire resistance limits of fire-resistant cardboard based on test methods and the minimum requirements of GOST 6266-97 are 20 minutes, GOST 32614 is even less - 15 minutes ., so it is more of a fireproof drywall.

Fire retardant efficiency groups of plasterboard

But, in addition to the fact that it practically does not burn, this material has a lot of other advantages that make it, in terms of its combination of qualities, with proper design, structural fire protection of wood and metal structures, very attractive for use in both new construction and reconstructed facilities; when carrying out major repairs, redevelopment of premises in buildings for various purposes, but more on that a little later.

Valuable properties and disadvantages

Fire-resistant plasterboard, in addition to its fire-resistant properties, also has other positive properties that must be taken into account when choosing a finishing material.

In fire safety terms, a quality certificate will help determine the basic technical properties of the material in the event of a fire:

Toxicity;
Degree of smoke generation;
Flammability;
Flammability limit.

Each of the indicators has its own encodings, determined by an alphanumeric code, where the letter denotes the property, and the number indicates the degree of expression in increasing order. So the D-1 marking means that the material has the lowest degree of smoke generation. Index B2 says that flammability is rated as average, G1 says that the material is not flammable, and index T indicates the degree of toxicity.

Gklo wall

In terms of generally accepted standards and qualities of building materials, Knauf plasterboard, as a quality standard for gypsum plasterboard, has the following sheet technical characteristics:

Side length 2500 mm;
Sheet width 1200 mm;
slab thickness 120-125 mm;
weight 25 kg;

The slab has excellent sound insulation properties; compared to conventional slabs 2500x1200x12.5 hl, the non-flammable one retains 15% more noise than usual. The use of sheets as a finishing material makes it possible to create any shapes and designs using installation technologies standard for this class of materials. A non-flammable sheet is also simply cut and bent, like a regular one, however, during installation you need to be as careful as possible with moistening the surface - the sheets lose their properties when over-moistened. This is perhaps the only drawback, but using fire-resistant material like ordinary moisture-resistant drywall is extremely irrational.

Some manufacturers, such as Knauf, are constantly using new solutions to improve the design properties of their products. Sheets of Knauf fireproof plasterboard are produced with the ability to “breathe”, which allows you to create rooms in which there is no musty smell, mold and mold.

Fire-resistant plasterboard

Fire-resistant plasterboard and other products can be purchased at Leroy Merlin in Moscow at low prices. Select the product you are interested in on the website and buy it in our online store. The range of products presented in the catalog is extremely wide. Among them there will certainly be a position suitable in all respects.

All products presented in the “Fire-resistant plasterboard” section are produced by well-known companies that have proven themselves to be of high quality for their products.

You can always place an order and pay for it online on the official website of Leroy Merlin in Russia. For residents of the Moscow region, we not only have low prices for goods in the “Fire-resistant drywall” category, but also fast delivery to cities such as Moscow, Balashikha, Podolsk, Khimki, Korolev, Mytishchi, Lyubertsy, Krasnogorsk, Elektrostal, Kolomna, Odintsovo, Domodedovo , Serpukhov, Shchelkovo, Orekhovo-Zuevo, Ramenskoye, Dolgoprudny, Pushkino, Reutov, Sergiev Posad, Voskresensk, Lobnya, Ivanteevka, Dubna, Yegoryevsk, Chekhov, Dmitrov, Vidnoye, Stupino, Pavlovsky Posad, Naro-Fominsk, Fryazino, Lytkarino, Dzerzhinsky , Solnechnogorsk, Istra and Zhukovsky.

Criterias of choice

When choosing a fire-resistant plasterboard sheet, in addition to the technical characteristics and its purpose, you need to pay attention to the manufacturer’s brand. Since only an official factory can guarantee the declared properties of its products. Among the most popular brands are:

Among the most popular brands are:

Knauf.
Belgyps.
GYPROC.
GIFAS.
NORGIPS.
Volma.
Giproc.
Rigips.
Magma.

The prices and quality of products from the presented manufacturers are approximately the same. Therefore, when purchasing, first of all, the material must be checked according to the following criteria:

External integrity - absence of cracks, breaks, potholes, etc. defects.

Only high-quality drywall will provide an airtight coating Source levelten.ee

Coincidence of markings and inscriptions on the packaging and sign of the product - brand name, dimensions, model, GOST are indicated on the edge of the slab.
Compliance with storage conditions - drywall must be kept at an ambient temperature of at least +10°C.

Conclusion

In order to correctly choose, buy and use fire-resistant drywall, you should study a number of rules, which I described above. Knowledge of the technical characteristics and nuances of working with the material that you now have, as well as the video in this article, will help you cope with the installation work yourself.

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November 22, 2016

Plasterboard systems, Finishing materials

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Features of GVL

Characteristics

Now let's look at the most important technical characteristics of gypsum fiber:

Characteristics	Meaning
Density	No more than 1250 kg/m3
Thermal conductivity of sheets	0.22 - 0.36 W/m °C
Compressive strength	10 MPa and above
Flexural strength	5.5 MPa and above
Soundproofing	35-40 dB
Vapor permeability coefficient	0.12 Mg/mhPa

Gypsum fiber has a high density

Performance

As a rule, when choosing a material, the buyer is not interested in “dry” numbers, but in the advantages and disadvantages of the product. Therefore, we will further familiarize ourselves with the performance qualities of GVL.

On the forums, many people ask experts whether the gypsum fiber board actually burns or not? Despite the assurances of the manufacturers, the fire resistance of this material can be discussed with some reservations.

GVL does not ignite

According to GOST 30244-94, the material is classified as G1, i.e. is slightly flammable. According to GOST 30402-96, it belongs to flammability class B1 - does not ignite. But how does this happen in practice?

When exposed to open fire, the surface of the material chars, but does not catch fire. Moreover, when exposed to high temperatures, the crystals contained in the structure of the gypsum fiber disintegrate. This releases water, which resists the flame.

As a result, the fire resistance of gypsum fiber board in minutes, as tests show, averages 90 minutes or more. Those. This is how long the material resists the spread of fire on the surface located behind it. This allows the use of gypsum fiber for fire protection of wooden and other combustible structures.

Gypsum fiber sheets are securely fixed with self-tapping screws

So, whether gypsum fiber burns or not - we figured it out, now let’s get acquainted with other important qualities of the material:

high density, which is comparable to the density of expanded clay concrete. This allows you to screw self-tapping screws into the gypsum fiber without dowels and even drive nails into it;
the material does not crumble. Thanks to this, gypsum fiber sheets can be processed with the same tools as wood;

GVL can be used as a flooring material

high strength (twice as much as plasterboard) - this allows the material to be used not only for finishing walls or ceilings, but also for floors. In particular, GVL sheets are often used in the construction of so-called dry screeds.

In addition, they can withstand high mechanical loads. Thanks to this, quite heavy pieces of furniture, for example, shelves, can be attached to the sheets;

GVL is able to withstand large mechanical loads

the low coefficient of thermal conductivity allows you to insulate the room to some extent. The sheets always remain warm to the touch;
frost resistance - this quality allows the material to be used for finishing unheated rooms. In particular, it can be used in country houses, on balconies, in vestibules, etc.;
high hygroscopicity - this property allows you to regulate the level of humidity in the room. Those. At high humidity, the material absorbs moisture, and at low humidity, on the contrary, it releases it.

GVL can be used for finishing vestibules and balconies

Of course, along with the advantages, GVL also has some disadvantages:

the weight is higher than that of gypsum boards, which somewhat complicates transportation and work with the material;
As a result of its high density, gypsum fiber board is not able to deform. In other words, the sheets do not bend. Therefore, it is more difficult to finish radius surfaces with them;
the material is more fragile than drywall, so you need to work with it carefully. This is especially true for the thinnest sheets.

In addition, the price of gypsum board is slightly higher than that of drywall. You can verify this from the following table:

Brand	Cost in rubles
Knauf 12.5 mm 1200x2500 mm	570
Knauf (moisture resistant) 2500x1200x10 mm	450
Gypsum polymer 2500x1200x10 mm	440

Thus, gypsum fiber sheets are a good alternative to plasterboard, especially in cases where high strength or fire resistance is required from the material.

Externally, the moisture-resistant gypsum fiber sheet does not differ from the standard one

Peculiarities

The main value of heat-resistant or, as it is also called, fire-resistant plasterboard lies in its positive properties and convenient use for interior decoration. This type of material has a number of advantages over other types of finishing materials. The main advantages of this product are the following qualities:

increased strength;
relatively light weight of the product;
fire resistance;
noise insulation properties;
thermal insulation of the room;
When heated, the sheets do not emit a specific odor or harmful substances.

In addition to the main properties that favorably distinguish these sheets of drywall from other types, there is also such a quality as ease of installation of the product , which is especially important if a master with a small amount of experience gets down to business.

With the help of such products, you can make your dreams come true, because plasterboard of this type can create a variety of designs in the interior of the room.

Experts recommend purchasing fire-resistant drywall, because if an unexpected fire occurs, this material will not undergo instant destruction, but will be resistant to flames.

In the building materials market, it is quite easy to distinguish high-quality material from a fake. High-quality heat-resistant plasterboard has the following features:

A pink or grayish sheet of cardboard is marked in red.
In addition to reinforcing layers, such material is also covered with layers of additional impregnation.
The thermal conductivity of the material is 0.22 W/Mk.
The density of the product is much higher than that of simple drywall. Typically it is 850 kg per cubic meter.

When burning and exposure to fire on the surface structure of fire-resistant plasterboard, the duration of containment reaches thirty minutes . After half an hour, the surface of the material will begin to rapidly deteriorate. The production of such products is carried out in special rooms with low humidity and high temperatures.

Types of drywall

The vast majority of plasterboard materials consist of a gypsum layer, which occupies a significant part of the volume, and an outer covering made of thick cardboard. Gypsum contains surfactants and natural moisture that is absorbed during use. Since the cardboard layer is in contact with air on only one side, it is charred by the flame, but does not burn. Gypsum performs an additional thermal insulation function, preventing the rapid spread of fire.

A more modern type of material is gypsum fiber sheet (GVL). Cellulose fibers in its structure are spread throughout the entire volume filled with gypsum. Due to this, good performance and higher strength are achieved than conventional drywall. GVL appeared on the market relatively recently and has a higher cost, therefore it is less common than gypsum board.

Video: Features of fastening drywall. Bit with limiter

There are several types of drywall (according to their intended purpose). The differences lie in the sheet thickness, dimensions and material of the outer layer. There are such types of gypsum boards:

“wall” is a regular plasterboard sheet used for finishing vertical surfaces (walls). Its thickness is 12.5 mm, and the sheet dimensions do not exceed 2.5 × 1.2 m. The density of the material is about 800 kg/m3;
“ceiling” – used when finishing the ceiling due to the lighter weight of the sheet (reduces the load on fasteners). Material thickness – 9.5 mm;
“moisture resistant” - is a material whose cardboard surface and gypsum core are impregnated with a water repellent and antiseptic. The role of the first is to counteract moisture, and the second is to prevent the development of mold and pathogens;
“fire-resistant” - differs from standard gypsum plasterboard by the presence of impregnation with fire retardants (mainly non-flammable metal salts). This material is somewhat heavier than usual (up to 850 kg/m3) and has a red-brown painted surface. Fire-resistant plasterboard can be used to decorate intensely heated areas located near chimneys, stoves, fireplaces, in kitchens, etc.;
“arched” is a special type of material that is highly flexible. Its properties are achieved thanks to its small thickness (only 6.5 mm) and the filling of the gypsum layer with thin polymer threads that protect it from destruction during bending. This plasterboard can be used to finish openings of any shape without fear for the safety of the material. Due to the small thickness of the sheet, arched plasterboard often has to be installed in two layers, which significantly increases the cost of the work.

On sale you can find material that has several qualities at the same time. Thus, ceiling plasterboard is often produced in a moisture-resistant version, and the fire resistance of gypsum plasterboard is combined with moisture resistance.

The wall behind or near the fireplace or stove - how to decorate it?

When a fireplace or stove is lit, the wall near it becomes heated. This is unsafe if the walls and floor where the stove or fireplace is located are not properly finished. This part of the house structure must be insulated with fireproof materials that can completely prevent fire. In addition, you need to take into account the requirements for installing heating devices - the distance from the partitions.

Insulation options

There are many non-combustible materials that can be used in this case. The easiest way to protect all surfaces from heat is to place a protective box around a red brick heat source. It is able to protect structures from heat and easily tolerates thermal effects. However, this decoration of the wall around the stove in the house looks a little unaesthetic and you can choose other materials:

Porcelain tiles and tiles.
Fiber cement boards.
Factory-made protective screens.
Metal sheets.
Artificial or natural stone.

The easiest way to work is with a ready-made protective screen - you just need to select it according to size and install it on site. This option is also good because such finishing of walls near the stove or fireplace is done in the shortest possible time and without “dirty” or “wet” finishing work. The remaining options are more labor-intensive and have some nuances. Therefore, they need to be considered in more detail.

Refractory materials for furnace lining

Fireclay materials for lining furnaces, namely brick and mortar, make it possible to create a protective fireproof screen both around the firebox and around the body of the metal furnace. The difference between a kiln brick screen and a lining screen is that the lining is a protective casing located close to the walls of the kiln.

Natural stone for finishing

Fireclay can withstand temperatures up to 1300 degrees. Today, in addition to bricks and mortar, there is also fireclay coating, glue, and mastic, which can be applied even while the stove or fireplace is operating. Their composition includes microscopic fireclay fibers and binding substances; they line the entire surface of the furnace and seal individual cracks. In addition, materials such as kaolin paper, kaolin cardboard, in the form of rolls and also kaolin wool in separate pieces are produced for lining.

Tile and porcelain stoneware

These two materials are best suited for insulation in this case, as they have a beautiful appearance and will not spoil the interior. However, in terms of labor intensity and costs, this will be the most complex method of registration. You will have to prepare the surface, stick the tiles and only then install the stove in place. At the same time, you will have to do without heat for some time, since the work is carried out in several stages and each takes time.

Fireproof plasterboard

One of the simplest to implement, but far from the worst option in terms of its qualities. The sheets are easy to attach to any surface, they are not too expensive and after installation the structure can be painted in the desired color or its front side can be decorated with another type of decorative coating. If appearance and design is not of paramount importance, then this is the best option.

Minerite or fiber cement boards

This material is suitable for those cases when there is no desire to waste time on laying tiles or assembling a complex protective structure. The plates are mounted directly on the wall or on a specially prepared metal profile structure. In the first option, the plates are simply attached with self-tapping screws or using clamps. With clamps, a ventilation gap of three to five millimeters remains between the wall and the assembled surface, which further increases safety.

The second method is more complicated, but such finishing of the walls near the stove in the house will protect them much better from the heat. On the surface, using a construction stapler, basalt cardboard with a foil coating is attached, with foil inside the room. Metal profiles are attached through the cardboard to fix the external decorative panels. Decorative slabs are attached to the profiles in such a way that they do not reach the ceiling a few centimeters. This gap is necessary to compensate for possible shrinkage of the house. Ventilation holes are made in the bottom of the slabs, which can be covered with a decorative grille.

Technology for installing fire-resistant materialheat-resistant materials for finishing walls near the stove

Multilayer protective technology, using the example of wall cladding near a heater in a bathhouse, consists of a sequence of actions:

A layer of vapor barrier and waterproofing is attached to a wall made of combustible material. As a vapor barrier, you can use a three-layer film consisting of foil, polyethylene, and kraft paper for strength. It is attached using a metal profile (wooden blocks can be used instead of a metal profile).
Next, insulation is installed, for example, foiled mineral wool. It is placed inside the sheathing so that the foil layer is on top. The joints of mineral wool slabs must be sealed with aluminum tape.
Using self-tapping screws, fire-resistant boards, for example, made of fiber cement, are attached to the sheathing. An alternative to fastening a multilayer structure is to install the plates with self-tapping screws through a sleeve. This creates a space between the slab and the wall.
After fixing the slabs, they can be faced with ceramic tiles for aesthetics. To do this, a metal mesh is screwed onto the self-tapping screws onto the slabs, onto which heat-resistant adhesive is subsequently applied and the tiles are glued.

If the installation is carried out in compliance with the technology and ventilation gaps, the wall near the stove will not heat up and will not create a fire hazard.

A budget-friendly way to protect between a stove and a wooden wall is to use profile metal used for the roof. To do this, you will need two sheets of such metal and hollow tubes. Hollow metal tubes are attached to the wall, and a metal profile is mounted to them. The distance to the floor and ceiling should be at least 10 cm. The tubes are attached to the sheet in the same place as the first ones and covered again with the sheet. Hot air moves in the gaps between the wall and the floor, while the wall remains unheated.

Metal sheet

This protection option can be used when the distance between the walls of the stove or fireplace and the protected surface is more than 20 centimeters. The sheet is simply attached to the surface so that its edges protrude beyond the edges of the heating device by 30 centimeters on each side. The option is unreliable and is not recommended for use if the heat source is not removed from the partitions at the specified distance - the risk of fire remains.

Stainless steel protective screens

Such heat-resistant panels for finishing walls near the stove are used very widely. Due to the fact that the screen consists of several layers, it protects walls very effectively. The design of such panels is a stainless steel shell, inside of which there is a fire-resistant material. The combination of a heat-reflecting outer layer and a protective inner layer allows you to reduce the distance to the protected surface from the heat source to 5 centimeters.

Stone

This type of wall decoration behind the stove or fireplace is very beautiful. However, this is also the most expensive finishing method if natural material is used. Artificial stone is cheaper, but it also falls into the category of expensive decoration. The surface is prepared using standard technology, and the heating device is installed after all finishing has been completed.

Alternative finishing methods

A possible option for covering is felt, which is pre-impregnated with clay. You need to attach a sheet of tin close to the top for thermal protection. The modern wide range allows you to choose other options:

Cover with flat slate, decorate with patterns
Plaster and whitewash
Lay tiles

For reference! The stove can be lined with stone, vermiculite, soapstone or terracotta.

Is it possible to cover the stove with plasterboard? It will burn, reduce heat transfer and simply crumble over time. An alternative is special refractory clay (or mortar). The finished surface can be additionally covered with porcelain stoneware.

How to prepare gypsum mortar for finishing a brick oven:

Knead the clay in water (1:3).
Wait until completely dissolved and mix thoroughly.
Pour the solution into another container.
After settling, add fine sand (1 part clay to 3 sand).

Is it possible to cover a stove with plasterboard? In its pure form it is suitable only for decorative stoves, but in working rough it can burn. A popular alternative is brick or tile. The distance between the surface and the material should be on average 1-2 cm.

What else to consider

To avoid any troubles during the operation of the furnace, you need to take into account the requirements of SNiP in all cases - even with installed protection, even without it. They are simple and compliance with these rules guarantees you the necessary level of protection:

The distance from unprotected wooden walls to the heating device is 1000 mm.
If the wall is protected by a material equivalent in thermal conductivity to brick - 130 mm.
If the floor is not protected by anything, then the distance to the bottom side of the heater should be at least 140 mm.

The floor is best protected with ceramic tiles or porcelain stoneware. You can also use a mineralite slab or a regular sheet of metal. It is most important to protect the area directly in front of the firebox door, as embers can fall out and cause a fire. Directly under the heating device, the floor covering does not heat up particularly strongly and if a distance of 4 - 15 centimeters to the bottom of the oven is maintained, additional protection may not be needed there.

How to insulate a wooden wall from a steel stove?

Table of contents

1. Options for wall insulation

2. Wall insulation material

3. Examples of thermal insulation of a wooden wall

Installing a stove is a complex process and requires a lot of attention to each stage, from preparing the installation site to the nuances of removing the chimney pipe from the roof. In this article we will talk about how to properly insulate a wooden wall from a steel or cast iron stove. Any wood has a predisposition to ignition, so a constantly hot stove design can easily cause a fire. Any builder understands that insulating the wooden wall behind the stove is a mandatory process. Let's look at an example of installing a Bavaria stove-fireplace on a wooden floor next to a wooden wall. The furnace does not have a separate foundation, so a light base for a metal structure is required. The base for the stove will be laid out with bricks in one layer. In this case, wall insulation can be done in two versions: asbestos cement sheets or flame sheets (non-hot composition). There are several opinions about asbestos - sometimes they say that they emit toxic fumes. But flamm has its drawbacks: they have standard sheet sizes of 600x1200 mm, which can be inconvenient when working, and also in terms of price they do not beat asbestos cement at all.

Options for wall insulation

Initially, the base for the stove was supposed to be one brick thick, but such a thickness for a wooden floor is not very good. Regarding the non-combustible partition, you should also note the importance of the situation - where the chimney will go, at what distance from the beams, walls and rafters. In the area of this Bavaria stove, it is best to use a concrete slab as a base - lay it along the beams, flush with the floors or a little more - it will turn out like a podium, reliable and ensuring safety. However, the bottom of this stove practically does not warm up; there is an additional part for firewood, which takes on the heat. Therefore, you can make it simpler - lay mineralite or CSP on the floor, then tiles or porcelain tiles on mastic or hot melt adhesive. In places where the chimney pipe is laid, you can use basalt, non-flammable or kaolin wool. Cotton wool plays the role of additional insulation and is placed in the ceiling section. In this case, you should make an opening in the ceiling - in accordance with safety standards - from the contour of the two-layer pipe - sandwich, 250 mm in different directions. The furnace cutting should be made of non-combustible materials - superisol, mineralite, calcium silicate, vermiculite. When passing through a chimney pipe, the groove should be filled with cotton wool.

It is, of course, very difficult to get rid of a beautiful partition, because it was built for aesthetics, a lot of time was spent on it, but if it was decided to install a metal stove against this wall, then you should get rid of the additional threat of fire of wooden parts.

Wall insulation material

Facing materials are often made from cement, the complete hardening of which can take several years. As a result, even after the work has been completed, changes in size, bends and deflections may be observed. Some manufacturing companies (for example,), use an effective and efficient method of keeping facing materials in an autoclave in a high-temperature, high-pressure oven. And it turns out that shrinkage due to drying and expansion by exposure to heat can be avoided, and reliable strength is also ensured.

Those same Nitikha panels are made from fiber cement, a universal material that consists of 90% cement and 10% cellulose fibers and various mineral fillers. In this case, technology without the use of asbestos is used by pressing the ingredients.

Panels of this type are environmentally friendly; their production does not use formaldehyde resins, chlorine compounds or asbestos. Fiber cement has excellent fire-resistant properties; it fully fits into the category of non-combustible materials. Fiber cement siding has many advantages, including the fact that it can easily be used to select various design variations, and it is also easy to install. Instead of mineralite, you can also use glass magnetic sheets - this is a more budget option.

Examples of thermal insulation of a wooden wall

Here's another example of making a fire-resistant wall located behind the fireplace:

treating the wall with fire protection (about 5 layers);
fireproof mats are attached with a stapler;
The slabs are attached through ceramic bushings - there are gaps at the bottom and top.

The decorative panels available are slightly flammable according to the fire classification. It turns out that only a 5 mm layer of basalt cardboard really protects the wall from fire. However, the oven is convection in nature and its outer surface does not heat up much. If you follow the manufacturer's instructions, it will not heat up more than 60 degrees. But you can't help but worry about safety. For example, even in summer, on the facade of the stove on the south side, it is worth measuring the temperature of the outer surface, and its value may greatly surprise you.

You can pay attention to the color of the first mono-pipe; the most furnace heat emanates from it. From the floor to the sandwich pipe, the wall should be reliably covered with super-insulation, especially since the stove is installed close to the wooden partition. In this case, when thermally insulating the partition, you should also pay attention to the cutting.

You also need to be careful about fiber cement boards; they come in two types: moisture-resistant for the facade and for landscaping fire-resistant partitions (the second option is gray in color, there is no paint or pattern).

Minerite panels, painted with acrylic (sometimes even in several layers, 5-6), belong to the category of low flammability and low combustion support. Because of the acrylic, the entire slab cannot be classified as “non-flammable”, and this is very bad; such panels, supposedly resistant to fire, are often used just when it is necessary to insulate wooden walls behind the stove - mineralite panels coated with acrylic look It’s beautiful, but, unfortunately, it won’t reliably save you from a fire.

If it suddenly turns out that you bought mineralite coated with acrylic, then you need to get rid of such “protection” of the wall. You should dismantle the panels - this is not difficult, in their place you glue gray classic mineralite onto a galvanized profile, and then terracotta tiles are glued onto it using heat-resistant tile adhesive. With such reliable thermal insulation you can sleep peacefully.

It also happens that gypsum board is used as protection. If the gypsum board is not protected by anything, then it will not play the role of high-quality thermal insulation. If the gypsum board is fixed to a tree with a metal profile, and tiles are attached on top of the gypsum board, then such protection is possible. Bare gypsum board should not be used for such purposes; its flammability class is G1, not NG (non-flammable). When installing, it is necessary to take into account the distance from the stove to the wall.

If the oven is operating normally, nothing should happen in any way. But the fire safety measures specified in the stove manufacturer’s passport must be observed. The distances to fireproof and combustible structures are clearly stated there. Gypsum is a good heat insulator, but its features should be taken into account. If the wall is wooden and gypsum board is attached close to it, therefore, when it is heated, dampness will form behind it, since the wall is cold. The wall itself also shakes - the tree always lives its own life at different humidity levels and temperature fluctuations in the environment. The profile is necessary not only to create an air ventilation channel behind it, but also for the durability of the entire structure. The tile adhesive needed here is one that is suitable for heated floors.

It is imperative to take into account fire safety standards when installing important distances. If you calculate the distance from the metal firebox to the wall, then it is more logical to add another 65 mm to such offsets - this is the thickness of the brick, which any metal stove does not have.

It turns out that an open retreat

to the unprotected wooden part is 320 mm (+65 mm), resulting in 385 mm - this is the minimum value.
To the protected wooden part 260 mm (+65 mm), and a minimum of 325 mm is obtained.

With a metal chimney things are much simpler. A sandwich with 50 mm insulation is already approaching the edge-on distance of a brick, that is, when passing the floor between the floors of such a pipe and without filling the foam with non-combustible materials and completely open for control, the following important distances must be maintained (from the outer wall of such a pipe):

To an unprotected wooden wall 320 mm (+ 15 mm), resulting in a minimum of 335 mm.
To a protected wooden wall 260 mm (+ 15 mm), resulting in a minimum of 275 mm.

If you are making an interfloor polyurethane foam completely closed and filled with any non-combustible materials (from pipes to wood), it becomes not a retreat, but a cutting, and accordingly, the minimum distances change:

minimum 500 mm from smoke to an unprotected wooden panel;
to a protected wooden panel 380 mm from smoke minimum. That is, with a sandwich insulation thickness of 50 mm - 330 mm from the outer contour to the protected joist. As for the roof passage, the distance of 130 mm to the sheathing and rafter part is taken into account from the wall of the brick chimney of 120 mm. That is, from the smoke to the protected sheathing and rafters there should be a minimum of 250 mm.

The simplest option for protecting wood is basalt cardboard and a metal sheet.

go to the section - THERMAL PROTECTION or to the section INSTALLATION OF FIREPLACES

Types of GVL

In addition to the standard gypsum fiber material, one of its modifications is known, which belongs to the category of moisture-resistant structures and is designated as GVLV. According to the classification, it is used in facilities with high levels of humidity, which may include kitchens and bathrooms, laboratory and workshop premises, car washes, canteens, restaurants, cafes. In addition to the humidity indicator, fire-resistant gypsum plasterboard differs in the condition of the sheet edge, which has two different designs: straight and folded. The first of these modifications is used when finishing floors, and the second is most often used when arranging wall structures in frame construction.

Based on the dimensions of the sheet blanks produced, this fire-resistant material is divided into the following two types:

classic modification with a sheet width of 1.2 and a length of 2.5 meters;
mini-sheets one meter wide and one and a half meters long.

The thickness of each of the listed types of plates is 10 and 12 mm, respectively.

Installation features

When you choose fire-resistant gypsum board for work, its characteristics play an important role. In matters of installation, a particularly important point is the presence of additional fibers in the gypsum, which make the sheet core more resistant to fire. As a result, screwing self-tapping screws into such material becomes more difficult, as does cutting it. But this doesn't slow things down much.

Under no circumstances should you attach fire-resistant drywall to wood sheathing. This building material is used due to the fear of fire, so there is no need to use wood, which burns very well. It is better to use proven metal profiles. In all other respects there are no significant differences.

What is fire-resistant plasterboard

The heat-resistant material is produced in the form of flat rectangular building sheets. They are a gypsum core, lined on both sides with durable cardboard. The fire-resistant variety is distinguished from standard gypsum boards by the following features:

The gypsum core is additionally reinforced with fiberglass. It is not afraid of high temperatures, and prevents the destruction of the material when exposed to fire.
The core contains water of crystallization, which increases the level of fire protection. During the heating process, the material seems to extinguish itself.
The sheet is reinforced from the inside with fireclay clay, which is sintered under the influence of fire and keeps the gypsum from crumbling.
The cardboard shell is glued to the core with special compounds that increase strength and turn the coating into a reinforcing frame. It is an excellent basis for applying any type of finishing material.

Fire-resistant drywall - what is it, pros, cons, scope of application

Fire-resistant plasterboard is a sheet of laminated material - gypsum board, covered in a cardboard shell. In addition to gypsum, the inner part includes clay, water and fiberglass, and the outer part contains a special impregnation of fire retardants. On the outside, the material has a characteristic red color.

Unlike standard gypsum plasterboard, fire-resistant plasterboard burns quite slowly or does not support combustion at all, depending on the conditions of fire spread. The period of direct flame retention ranges from 20 to 60 minutes and is determined by the following factors:

The most compacted connection between cardboard and gypsum filler.
Anti-flammable impregnation.
Reinforcing structure made of fiberglass threads up to 30 mm long, preventing destruction under the influence of heat.
Contains fireclay clay. Under the influence of high temperature, it sinteres and, strengthening the slab, prevents it from crumbling.
Presence of crystal hydrates in the composition. When heated, they release water. As a result, the material becomes damp and extinguishes itself.

Structure of fire-resistant drywall Source pozharanet.com
All this makes it possible, if not to contain the spread of fire, then at least to slow down its spread until professional fire-fighting assistance arrives.

Advantages and disadvantages

The main advantages of fireproof gypsum plasterboard:

Environmental friendliness, cleanliness, safety. Can be used in any room.
High resistance to fire spread - up to 60 minutes.
Increased moisture resistance - can be installed in rooms with a high degree of air humidity.
Good noise and heat insulation due to the clay component included in the composition.
Service life is at least 5 years.
Convenient processing and installation.
Versatility in finishing - suitable for plastering, painting, whitewashing, wallpapering and tiling.
Preservation of the room microclimate.
Reasonable price.

However, despite its good fire resistance, heat-resistant drywall creates a number of difficulties in installation and use - it is necessary to use special tools for cutting, high density and weight, the need for strengthening under loads, in addition, GKLO is not as water-resistant as GKLV or GKLVO.

Covering a room made of aerated concrete blocks with fire-resistant plasterboard Source pozharanet.com

Scope of application

Heat-resistant gypsum board has a wide range of applications:

Finishing of main walls and load-bearing structures.
Covering wooden surfaces to prevent fire.
Manufacturing of fireproof boxes for laying communications.
Construction of interior partitions.
Creation of suspended ceilings.
Insulation of chimneys.
Finishing of stoves and fireplaces.

Note! GKLO can be equally effectively used to create interior partitions to prevent the spread of fire in the event of a fire. It can be used equally effectively for finishing fire-hazardous premises - boiler rooms, boiler rooms, walls in a bathhouse opposite the firebox - to prevent heating of building structures from hot elements.

See also: https://m-strana.ru/services/otdelochnye-materialy/

Test procedure

It is carried out when serial commercial products are put into production, and then periodically - at least once a quarter; and also when changes are made to the production process, new materials and additives are introduced into the recipes of raw materials. According to GOST, the test procedure for fire resistance is similar, but according to GOST 32614 it is carried out under more stringent conditions:

Take three sheets of plasterboard or 6 sheets of GSP from a batch of commercial products.
Two gas burners are directed onto the cut sample to achieve a value of 800±30℃ - for gypsum plasterboard until destruction, measuring resistance to open flame in minutes, normally not less than 20 minutes; 1000±50℃ – for GSP for 15 minutes (normal) or until destruction.
All samples are subjected to tests, and if at least one of them does not pass them, losing its integrity, collapsing into two or more parts; then the tests are considered unsatisfactory, the batch of GKLO, GKLVO or GSP-DF cannot be accepted as a fireproof/fire-resistant material.

Gypsum fiber sheets

All products presented in the “Gypsum fiber sheets” section are produced by well-known companies that have proven themselves to be of high quality for their products.