Moisture resistant drywall, what is gclv and how it differs from gcl. Where is it applied and how does gvl differ from gcl

Such products are quite often used in the field of construction and repair - for leveling surfaces, changing their configuration (relief), arranging partitions. It makes no sense to list everything. The presence of the word "gypsum" in their names indicates that these materials are practically the same and are nothing more than analogs.

This often introduces some confusion, and for a person inexperienced in special terminology, it complicates the choice of the best option for a particular situation.

Drywall (gypsum plasterboard) - sheet based on pure gypsum (compressed), pasted over on both sides with thin cardboard. Hence the name.

Gypsum fiber (GVL) - the basis is the same, but there is also a difference. The "core" consists of gypsum, to which fine paper fractions (cellulose fibers) are added. Therefore, GVL is a material with additional reinforcement (reinforcement). And there is no cardboard "shell".

It is this difference in production technology that led to differences in some properties of materials and determined the specifics of their application.

GKL

• Drywall is insufficient mechanical strength (even fragility), so a rigid one is required for its installation. Before sticking on a hard base, it must be perfectly aligned, since even with slight mechanical stress, the sheet easily breaks.
• GCR is quite malleable if moistened with water. It is this feature of it that is used in cases when it is necessary to mount a curly structure, for example, of an arched type. Or round the corner of the room.
• The sheets are fixed either with glue or with self-tapping screws. But the nail will not stay in the gypsum board - it will only pierce it.
• Cutting is not difficult - a sharp blade is often enough.

On a note! It is believed that gypsum boards can be mounted on any base. This is not entirely true, and clarification is required - only in the vertically oriented one. Therefore, for the arrangement multilevel ceilings it is undesirable to use them.

GVL

• Gypsum fiber sheets are stronger, tougher than gypsum board.
• The density (and, therefore, the weight of GVL) is also higher. Hence, greater than that of drywall, resistance to thermal effects.
• Reinforcing fibers reduce the flexibility and pliability of the material. This complicates its cutting, and it is definitely not suitable for making arches.
• Resistance to subzero temperatures higher than that of GCR, about 3.5 times.
• Some "viscosity" of the structure leads to the fact that a nail hammered into a sheet holds in it no worse than in wood.
• Gypsum fiber does not absorb moisture as intensely as GCR. Therefore, these sheets can be used to decorate rooms such as toilet and bathroom. But we must not forget that, nevertheless, GVL also has a certain limit of resistance to liquids.
• The indicator exceeds similar characteristic drywall 1.5 times.

Perhaps this is the fundamental difference between gypsum fiber and drywall. All their other parameters are almost identical - operating temperature range, hygiene, and so on.

Conclusion - despite the apparent "similarity" of materials, where the surface finished with sheets will experience an increased load, including dynamic (for example, floor), preference should be given to GVL. And to create structures with complex geometry, you should choose drywall.

On a note! Each type of product is produced in various “modifications” that differ in certain characteristics. Before purchasing a product based on gypsum, all the features of a particular sample need to be clarified additionally.

The cost

Sheets of both materials are available in various sizes, thicknesses, varieties. Therefore, if we summarize all the data, it turns out that, on average, GVL is approximately 1.8 - 2.2 times more expensive than similar GCR. Perhaps this is partly due to the fact that the latter have found wider application in everyday life.

Both gypsum fiber (GVL) and gypsum board (GKL) are widely used in dry construction. But which of these materials is best used in decoration? Compare properties and choose the best.

Of course, I want to carry out any repairs in such a way as to complete all the work quickly, not spend a lot of money, not dilute the dirt and get beautiful walls and the ceiling. Modern technologies give this opportunity. Drywall and gypsum fiber come to the rescue of the builder. But which is more profitable to use in repair, gypsum board or gypsum plasterboard? What is the difference between these materials? We will try to figure it out and choose the best way for dry finishing of premises.

What is GVL and GKL

Before understanding the features of properties and subtleties use of GVL and GKL, you need to find out what these materials are. They are used to solve the same problem: creating a perfectly flat surface without the use of wet mixes or mortars. But these materials differ from each other both in structure and in properties. Therefore, their scope of application is also not the same.

Drywall is a sheet material of a composite nature. The core of the sheet is a gypsum layer. On both sides it is closed with sheets of cardboard. Cardboard gives the sheets of gypsum board smoothness and strength.

The technology for creating gypsum fiber sheets (GVL) is based on a different principle. The cellulose fiber is impregnated with a gypsum solution and the resulting mass is formed into sheet material. If the letter "B" is added to the marking, it means that additives have been introduced into the mixture that provide the finished sheet with resistance to water vapor.

GVLV can be used for repairs in rooms with high humidityeg in bathrooms.

Types and application

The purpose of GVL is to level the surfaces of walls, floors, ceilings. Unlike drywall, GVL sheets are not damaged by fire by default. This is achieved by covering the combustible cellulose with a layer of non-combustible gypsum.

The surface of the sheet can be either rough or well polished. The first type is cheaper, but requires filling the entire surface. It is possible to grind the sheet only on sophisticated equipment, therefore, only large manufacturers, such as "KNAUF", produce the grinded gypsum board. When using sanded sheets, it is enough to seal only the joints with putty. But you have to pay for making the work easier: the sheets of this type are more expensive.

According to operational options, GVL sheets are divided into three types:

• "GVL". The basic variety, which has no particular advantages, but the cheapest. Used for wall decoration in rooms with normal air humidity.
• "GVLV". Moisture resistant variety. It is able to withstand high levels of air humidity (from 70%). It can also be used to level the floor without screed.
• "GVLV EP". The letters "EP" in the title mean "floor element". This type of GVL sheets has the greatest strength, therefore it is best suited for leveling floors.

The edge of the sheet can be flat or have a chamfer, removed with a planer.

Beveled sheets are usually chosen for wall decoration because chamfered seams are easier to seal flush with the sheet. Sheets with a flat edge are usually used for finishing the floor surface.

Where used, types

The main purpose of drywall is the construction of partitions, the creation of multi-level ceilings, the leveling of wall surfaces. Modern industry produces four types of such sheets:

• Plain gypsum board. It can be used in rooms for any purpose, where the air humidity does not exceed 70%. The standard version has the most affordable price, but you shouldn't hope for any special advantages from them.
• Moisture resistant gypsum plasterboard (often labeled as gypsum plasterboard). The cardboard with which the gypsum filler is coated is impregnated with special compositions of substances in this modification. This helps to successfully resist high humidity air (more than 70%). Such material can be used for decoration kitchen facilities, laundry rooms and other rooms with a high content of water vapor in the air.
• Fire resistant gypsum board. The sheet must withstand the action high temperature and an open flame without changing properties for at least 20 minutes. To achieve such properties, fiberglass is introduced into the gypsum filling as a reinforcing component. It can be used, for example, for finishing electrical control rooms, warehouses, chemical laboratories and other places where there is a high risk of fire.
• Adding fiberglass to the gypsum core and increasing the density of the gypsum layer made it possible to give the soundproof gypsum board the ability to effectively cut off air waves. These sheets are used in the decoration of living quarters, recording studios, rehearsal rooms, classrooms, etc.

Each variety has its own color coding... Plain gypsum board is marked in gray, moisture resistant - green, fire resistant - red, insulating sounds - purple.

In addition, varieties of drywall sheets are distinguished by the type of edge dressing. Most sheets are thinner on the long side than in the middle. There are also sheets of uniform thickness, as well as various options for rounding the edges. This finish makes it easier to cover up the joints between the sheets.

Comparing two materials: main characteristics

So far we have not found very many differences. Both GKL and GVL are materials in the form of sheets. At the heart of each material is gypsum, the purpose is to level surfaces, the material can resist fire and moisture. The only difference that is still noticeable is that the GVL can be laid on the floors, but the GUL is not, since its strength is not sufficient for this. But this is only the first layer. Now let's compare the characteristics of the materials.

Density and strength of materials

This is the parameter by which GCR and GVL differ very significantly. The point is in the different structure of the material. The layered structure of drywall and the use of unreinforced gypsum as a core make this material brittle. The gypsum board sheet is easy to break, so care must be taken during transportation and installation. The scope is also limited. In rooms where I can inflict a strong blow on the wall (for example, gyms), it is better not to use GCR.

GVL is a composite with a much more equilibrium structure. Cellulose fibers reinforce it in the same way that metal rods strengthen the structure of reinforced concrete. Therefore, GVL is much more resistant to shock loads. Even a standard sheet is able to withstand tensile forces of up to 5.5 MPa.

The weight

To calculate the strength of fastening structures, to assess the complexity of installing sheets on walls and to solve many other problems, it is necessary to compare the weight of these two materials. If it turns out to be too large, you will have to make more massive and reliable fastening structures.

To be able to compare, you first need to agree on overall dimensions compared sheets. For gypsum board, the standard is a sheet with parameters 1.2 mx 2.5 m.Depending on the thickness, such a sheet will weigh:

• 6 mm - 15 kg.
• 9.5 mm - 22 kg.
• 12.5 mm - 26 kg.

Moisture resistant sheets are heavier than usual. Thus, the mass of a sheet with a thickness of 12.5 mm increases by 3 kg, which is slightly more than 10% of the total mass. And this is already quite a noticeable increase.

GVL is heavier than drywall. With the same size, the weight characteristics of the sheets, depending on the thickness, will be as follows:

• 10 mm - 36 kg.
• 12.5 mm - 42 kg.

If we compare the mass of the thickest sheets, it can be seen that GVL is heavier by almost 40%! Naturally, such a large mass makes it difficult to install sheets in place, transport, cut. It is also required to install more solid fasteners. All this cannot but affect the cost of installation.

Flexibility and fragility

This parameter is also associated with the structural features of the material. Due to the laminar structure, drywall is more flexible than gypsum plasterboard. For example, if you try to lift a layer of GVL lying on the floor by grabbing the short side, it will almost certainly crack. Drywall with such a situation will bend, but will not break.

Due to the presence of short cellulose fibers in the composite, GVL is a brittle material. Therefore, gypsum fiber boards cannot be used to finish bent surfaces, even with relatively smooth bends. Drywall can also be used to decorate arches, smooth transitions on the ceiling and other similar architectural elements.

It is difficult to say unequivocally which is better, since the opinion of experts in finishing worksah on this issue differs. But you can highlight the following pointsthat most professionals agree with:

• It is worth choosing gypsum fiber board for walls and ceilings if it is planned to use it to achieve incombustibility or to increase the strength of the building (relevant for frame buildings).
• For the floor - only gypsum plasterboard, since the strength of drywall is insufficient for such a task.
• For rounded corners and arches, only plasterboard is suitable.

With the help of new sheet finishing materials, you can significantly reduce the repair time, carry out all work without unnecessary dirt and labor costs and achieve excellent results... But for this you need to know the specifics of the materials and understand in which cases it is more profitable to use drywall, and when gypsum fiber is more suitable.

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"Dry" construction has been actively used in our country for only a few decades. This term hides a way of erecting certain structures without using special solutions and mixtures designed to align the geometry of the surface being trimmed. Instead, they use special materials, initially having a perfectly flat surface. Those who are not involved in execution construction works, immediately decides to clarify the GKL - what it is. GVL, GKLV - will also be little-known terms. We offer you to understand the features of each material and their possible field of application.

Moisture resistant drywall is widely used in dry construction

Before you start purchasing building material, it is worth understanding the distinctive features of GVL and GKL. Each material has its own recommended area of \u200b\u200buse. Having familiarized yourself with the characteristics of a particular type, it will be easier to choose the appropriate option for the structure being built.

What is gypsum board in construction. Main types of material

Plasterboard sheets are a laminated material, in the middle of which there is gypsum, and thick cardboard. They are widely used for leveling walls, erecting partitions and multi-level structures, including ceiling ones. Manufacturers offer four main types of drywall:

• Plain gypsum board. Sheets gray with distinctive blue markings. They can be used for finishing residential and public premises where the humidity level does not exceed 70%. The most common and cheapest type;

• Moisture resistant gypsum plasterboard. What it is? These are multilayer sheets, inside of which there is gypsum, and along the edges of the cardboard of a characteristic green color, processed with special components that increase the resistance of the material in conditions of high humidity;

• Refractory GKLO. Such material is able to withstand for at least 20 minutes direct impact fire, achieved by introducing special reinforcing elements made of fiberglass into the composition. Their distinctive feature is the characteristic red color of the cardboard located on both sides of the plaster;

• Universal GKLVOwhich can be used for finishing industrial premises due to good moisture-resistant qualities of fire resistance. During the production process, the fire-resistant base is glued on the outside with moisture-resistant cardboard.

Related article:

GVL: what is it and the main types

Now it's worth figuring out what it is GVLV and GVL. Thus, gypsum fiber sheets are designated, for the manufacture of which gypsum reinforced with cellulose fiber is used. The presence of the last letter "B" in the designation indicates that the material is moisture resistant and can be used for finishing rooms operated in conditions of high humidity.

Is there a difference between GVL and GCR: a comparative analysis

By choosing finishing material for wall decoration, it is important to know the differences between GKL and GVL and distinctive characteristics of each material. The possibility of using sheets in specific conditions and their service life depends on this. So, if you have to align the walls in a production, office or public space, it is worth giving preference to gypsum fiber sheets. To form a niche, column or arch, it is worth purchasing drywall.

We suggest that you familiarize yourself with the main differences in GVL from GKL:

Of general characteristics it should be noted that there is no characteristic odor and the presence of toxic substances in the composition, which makes it possible to use the sheets for decorating residential premises. Good dielectric properties.

What is better GKL or GVL: which material to choose

Both materials are functional and well-deserved. It is often difficult to choose the material for the walls. Drywall or GVL? The decision is made with great difficulty. Each material has its own distinctive features, and therefore, when choosing, one should be guided by the operating conditions.

To decide what is the best gypsum board or gypsum fiber for specific operating conditions, we suggest that you familiarize yourself with the technical characteristics of both types of materials. In this case, it will be possible to ensure a sufficient service life of the mounted structure.

Comparative technical characteristics of gypsum board and gypsum plasterboard: parameters that are relevant when choosing a material

To make the final choice in favor of this or that material, it is worth comparing in advance the technical characteristics of GCR and GVL. If according to some indicators the plates differ slightly, then according to others the difference is very significant. We suggest that you familiarize yourself with the numerical values \u200b\u200bof the most relevant parameters.

Geometric parameters of gypsum board and gypsum plasterboard: is there a difference

The dimensions of the sheet largely determine its possible area of \u200b\u200buse. The geometric parameters of the material are standardized, however, if you wish, you can contact the manufacturer directly and order sheets of a certain size in order to reduce the amount of waste.

Advice! Count up required amount material and cut to maximize material utilization and cut costs.

Manufacturers offer drywall of various lengths: from 1.5 to 3.6 m.The dimensions of 2, 2.5 and 3 m are considered standard.When choosing a suitable length, you should focus not only on the parameters of the surface to be finished, but also on the conditions for delivering the material to the place of execution work. If the height and width of the openings are relatively small, buying sheets longer than 2.5 meters may be impractical.

The standard width of drywall is 1.2 m. However, the given dimensions of the gypsum board may differ. In the catalogs of some manufacturers, you can find material with a width of 0.6 m, which is convenient to transport in a car. This is a suitable option for facing a small surface area, since otherwise the number of joints formed will be significant, which will increase the cost of finishing work.

The thickness of standard sheets is 6, 9 and 12.5 mm. In the catalogs of some manufacturers, material with a thickness of 6.5 and 9.5 mm is presented. For reinforced and fire-resistant boards, the transverse dimensions reach 15, 18 and 25 mm. When choosing a material, you should focus on the type of work to be performed. Thickness of plasterboard for walls 12.5 mm. For the formation of arches, it is better to choose thinner sheets - 0.5 mm.

The gypsum fiber sheets are of similar dimensions. Most manufacturers offer material with a size of 1.2 by 2.5 m. You can find sheets with other parameters, among which the most popular is the size 1.2 by 1.5 m. The length of the sheets can exceed 2.5 m. with a sufficiently high ceiling, it is worth giving preference to 2.7 or 3 m.

Attention! In the catalogs of manufacturers, material is presented in widths of 0.5 and 1 m.

The standard thickness of sheets is 1 - 2 cm. The area of \u200b\u200buse of a particular material largely depends on this dimension. The dimensions of a sheet of GVL for walls may differ, but the thickness will be 1 cm. For the floor, choose a thicker material - 2 mm.

Attention! If the cost gypsum fiber sheets will turn out to be "overwhelming" for the family budget, it is worth giving preference to a moisture-resistant gypsum board measuring 2.5 by 1.2 m.

GKL and GVL weight: compare parameters

When calculating strength characteristics load-bearing structures pays special attention to the materials that are planned to be used at the stage of finishing. If their weight turns out to be significant, additional measures will have to be taken to increase bearing capacity erected structure.

The weight of the gypsum board sheet depends on its thickness and linear dimensions. The greater the geometric parameters of the material, the greater its mass. When calculating, it is imperative to take into account the weight of 1m2 of plasterboard. This indicator depends solely on the transverse dimensions of the sheet. How to change the weight of a sheet of the same size with an increase in its transverse dimensions can be found in the table:

Attention! The weight of the moisture resistant gypsum board is more than the standard one. A sheet with dimensions of 1.2 by 2.5 m and a thickness of 12.5 mm weighs 29 kg.

GVL also weighs more than standard drywall sheets. The mass of the slabs depends on their transverse dimensions. With standard dimensions of 1.2 by 2.5 m, a 10 mm thick sheet will weigh 36 kg, and with a thickness of 12.5 mm - 42 kg. The average weight of one square of material in the first case will be 12 kg, and in the second - 14 kg. This should be taken into account when planning finishing work in a particular room.

Main technical characteristics of GKL and GVL

When choosing suitable option should focus on the technical characteristics of the material offered by manufacturers. This largely determines the possible area of \u200b\u200buse of specific sheets, the conditions of their transportation and installation.

Strength

Due to the reinforcement with cellulose fiber, gypsum fiber sheets have a sufficiently high strength. Its tensile strength for material with standard parameters is at least 5.5 MPa.

Drywall is fragile, which must be taken into account already at the stage of transportation. There is a high probability of sheet splitting or other mechanical damage. If in the course of subsequent operation it is planned to increase the load on the surface being trimmed, a material of greater thickness should be chosen initially. For example, to decorate walls on which some heavy equipment will hang, it is worth choosing sheets thicker than 12.5 mm.

Flammability

Standard sheets drywall have a low level of flammability. In case of fire, the outer layer of the cardboard can burn out, and the gypsum layer can crumble. If the room has increased requirements for fire resistance, you should choose GKLO. Thanks to the introduction of special reinforcing additives into the composition of the gypsum filler, manufacturers have managed to increase its strength characteristics. As a result, GKLO sheets are able to maintain their structure under conditions when ordinary drywall loses its shape. In terms of flammability, GCR corresponds to class B2, flammability - G1 and self-formation - D1.

Gypsum fiber possesses high level fire resistance. Sheets are used for decoration of premises corresponding to F1 and CO hazard classes. They are often used in wooden buildings to protect structures made of wood from possible fires.

Frost resistance

Drywall can be used little for decoration of premises that are operated exclusively in summer time... Such material is able to withstand temperature fluctuations without loss of strength characteristics (up to 4 freeze / thaw cycles). After warming up the room to room temperature, mechanical properties sheets are completely restored.

HS sheets also have a high level of frost resistance. They are able to withstand up to 15 freeze / thaw cycles without losing their main characteristics. They are often used to decorate buildings in which there are interruptions in heating winter period time.

Water absorption

Drywall is sensitive to moisture. Standard GKL sheets can be used for finishing residential and office premises... If the bathroom is to be cladding, it is worth ordering a waterproof drywall, which, thanks to special processing, is able to withstand high humidity.

Moisture resistant gypsum board is able to absorb no more than 10% moisture. For standard material, this parameter is much lower.

Attention! After getting wet, standard drywall sheets lose strength.

GKLV can be operated in a room with elevated level humidity provided there is good ventilation and additional processing protective compounds... Otherwise, there is a high probability of excessive penetration of moisture into the material.

Gypsum fiber has a low level of water absorption, which makes it possible to install them in a room with high humidity. Due to the special production technology, the moisture content of the gypsum board does not exceed 1%

Thermal conductivity

Drywall has a fairly high low thermal conductivity (0.15 W / (m * K)). It is able to retain heat indoors better than most natural materials. A similar indicator is typical for gypsum fiber (0.22 - 0.35W / (m * K)). In terms of thermal conductivity, sheets are close to natural materials... So, for oak, the same indicator is 0.23W / (m * K).

To determine this characteristic, a standard technique is used, which involves the use of a sheet of drywall 0.4 m wide, laid on supports, the distance between which is equal to forty times the thickness of the material. So for sheets with a thickness of 10 mm, this parameter is 15 kg. With an increase in the cross-section to 11 - 18 mm, the possible load increases to 18 kg.

Due to the presence of reinforcing fibers, GVL is able to withstand a heavy load.

Scope of GKL and GVL: ideas for subsequent implementation

GVL and GKL are used for registration different surfaces... With their help, you can not only level the walls, but also create unique and functional partitions. We invite you to get acquainted with already ready-made solutionsto make it easier to develop a project for your home.

Partitions and walls: ideas for space zoning and room decoration

GVL for walls is rarely used due to the large weight of the sheets. Most often, wall surfaces are leveled with drywall. When starting to sheathing gypsum boards, it is worth choosing a material with suitable characteristics... If suitable for residential premises standard drywall, then a moisture resistant one should be purchased for the bathroom.

If you plan to install partitions from gypsum plasterboard, you should immediately think about their sizes, shapes and the presence of niches. In the latter case, dividing the space into separate zones, the partition can act as a shelf for storing beautiful products.

When starting to install the gypsum board on the wall, you should choose the method of fixing the sheets. Most often it is pre-assembled for this purpose. metal carcass, to which the sheets are subsequently attached. In this case, strict requirements are not imposed on the base surface.

However, if the wall surfaces are initially flat enough, you can fix the sheets directly to the wall.

Related article:

Ceiling: lighting placement option is selected individually

Device false ceiling from GKL has become widespread. Due to the sufficient rigidity of the material, it is possible to form ceiling system any size and shape.

If you are planning a bathroom, then the best solution the ceiling will be made of GVL. Such a design will not be afraid of moisture and will be able to serve for a long time.

The technology for mounting the gypsum board on the ceiling involves the preliminary fastening of a metal frame designed to fix the gypsum board.

Other ideas you should definitely get acquainted with

Drywall and gypsum plasterboard is used in the design of many surfaces. The device of the GKL slopes of windows and doors is especially popular. In this case, form a smooth and even surface without significant effort.

Laying gypsum fiber on the floor allows not only to level the surface, but also to significantly reduce the time required to complete the work.

Formation arched openings from the GKL, you can devote an entire article. The choice of design will depend on the width of the opening and the style of the room.

Article

Dry construction technologies have been used in the West for many years and are now gaining popularity in Russia. The use of gypsum board or gypsum plasterboard (gypsum board or gypsum fiber sheets) allows you to minimize the "wet" repair processes, significantly reduce the cost and shorten the time for finishing work. Only one question arises: which is better to choose - GKL or GVL?

What is the difference between materials

• A drywall sheet consists of a gypsum core with fillers, lined with cardboard on both sides. Three-layer material.
• Gypsum fiber has a uniform structure throughout its thickness. For its manufacture, a gypsum mass reinforced with cellulose fibers is used.

Material characteristics

To understand which is better, drywall or gypsum fiber, it is worth comparing the characteristics.

• Durable sheet for leveling walls, ceilings Resistant to deformation.
• Flexibility, elasticity, the ability to create arches, complex structures
  forms.
• Easy installation with glue and self-tapping screws.
• Pliability in processing, hand cutting, tendency to crumbling.
• Fire resistance in the performance of GKLO.

• Sheets are stronger and tougher than GKL, suitable for laying on the floor.
• High density and significant weight, resistance to temperature extremes.
• Unbending.
• Frost resistance, 3 times higher than that of gypsum board.
• Increased moisture resistance and sound insulation.

For what purposes the materials are suitable

For ceilings. Drywall is a more suitable material for finishing ceilings than gypsum plasterboard. It is much lighter, does not create undue stress on hangers and profiles fixed to the ceiling. Light weight makes the sheets easy to install.

For partitions. The choice of material depends on the design. Simple partitions with a rectangular opening can be assembled from gypsum fiber board. Sheets will provide rigidity good sound insulation... If you plan to arrange an arch, a complex decor, it is better to choose a gypsum board. Drywall is easier to handle.

For bathroom. In this case, it is better to use gypsum fiber, especially for laying on the floor. The material does not absorb water, does not deform in high humidity conditions. You can use moisture-resistant drywall in the bathroom, but only on walls that do not get wet.

For a wooden house. The choice depends on the purpose of use. Both materials are suitable for leveling the walls. Sheets pass air and steam equally well, allow different types decorative finishing... If it is necessary to increase the fire resistance of the structure, choose GKLO brand drywall. To protect the walls from moisture in the kitchen and bathroom, GVLV is used.

Which is cheaper?

The cost of drywall is lower, since it is easier to manufacture and slightly inferior to gypsum fiber in terms of characteristics. In some cases, for example, with increased surface loads and high humidity, the price of GVL is quite justified and is repaid many times over by its properties.

If it is difficult to make a choice on your own, you can contact the specialists and describe the tasks in detail. Depending on the place of application, operating conditions, requirements, a professional will help you choose the best option.

Photo: ShutterStock / Fotodom.ru. It is not easy for an ordinary consumer to find the difference between gypsum board made according to the old and new standards. However, professionals will surely appreciate the opportunities that the new standard opens up.

It is quick and easy to erect, dry construction technology helps to create the basis for decorative. They are based on a metal frame and cladding made of various sheet materials... Low weight of parts ready-made structures, for example, are obtained much lighter than those erected from bricks, concrete blocks, tongue-and-groove slabs.

In addition, the latter require subsequent plastering and other wet processes for the final leveling of the surface. And the thicker the plaster layer, the longer it dries and the longer it takes before finishing... In dry construction, labor-intensive wet processes are minimized, which significantly reduces the repair time.

Drywall

The most popular sheet material is drywall (GKL). It is a rectangular flat element made of a gypsum layer (core), lined with special cardboard on both sides. The longitudinal edges of the sheet are seamed with the edges of the face layer of the cardboard, the end edges remain open.

To reach high operational properties gypsum core (density, strength, etc.), special modifying additives are introduced into its composition. Facing cardboard acts as a reinforcing frame, and also serves as a basis for application finishing materials: decorative plaster, paint, wallpaper, ceramic tiles.

Photo: KNAUF. The front and back sides of the gypsum-fiber Knauf super-sheet are treated with an effective water repellent agent, sanded and treated with an anti-chalking impregnation

The sheets are environmentally friendly, odorless, do not contain or emit substances harmful to human health. Like all gypsum-based materials, they have the ability to breathe, that is, absorb excess moisture from the air and release it into environment with a decrease in humidity. Gypsum is non-combustible, fire-resistant and contains about 18% crystallization water (with a sheet thickness of 12.5 mm, this is about 2 l / m²). therefore building construction from GKL have high fire resistance. In case of fire, they retain their integrity and insulating ability for a long time, slowing down the spread of fire.

Photo: KNAUF. Perforated paper tape KNAUF (0.05 × 50 m) is intended for reinforcing joints of gypsum board and gypsum board of various types (150 rubles / piece)

Plasterboard is produced by Knauf, Saint-Gobain (trade mark Gyproc), Volma, BelGips. Common dimensions of gypsum board: thickness 9.5 and 12.5 mm; width 600, 900, 1200 mm; length 2500 and 3000 mm. Sheet price 2500 × 1200 × 12.5 mm - from 190 rubles.

Photo: Saint-Gobain. Installation of GKL and GVL is carried out at a temperature not lower than 10 ° С
(at winter time with the heating on), in dry and normal humidity conditions, when all wet processes are finished, before the installation of clean floors

GKL \u003d GSP

Since January 2015, a new "Interstate Standard 32614-2012 (EN 520: 2009) - Plaster Plates for Construction" is in force. From this time drywall sheets (GKL) are called "gypsum building boards" (GSP) and the number of types is significantly increasing. Previously, there were four of them: conventional (GKL), moisture resistant (GKLV), fire resistant (GKLO) and moisture resistant (GKLVO). The new standard contains eight types, including slabs of a given density, increased strength, slabs with increased surface hardness, etc. And most importantly, these are different useful qualities can be combined with each other to obtain materials that differ even more in properties, including for new areas of application.

Gypsum fiber sheet

Gypsum fiber sheet (GVL) is a pressed board made from a mixture of a gypsum binder and fluff cellulose fibers evenly distributed in it, which play the role of reinforcing elements. The material is hard, durable, has excellent fireproof and sound insulation properties. It is used for cladding walls, ceilings, and creating partitions.

For places where the material must withstand the effects of moisture with periodic moistening and drying, moisture-resistant gypsum-fiber sheets (GVLV) are intended. Their front and back surfaces are highly resistant to moisture penetration. Compared to drywall, gypsum fiber sheets have increased strength. Therefore, they are used as a basis for finishing floor coverings in rooms with dry or normal humidity regime... With GVL, it will provide a high degree of fire safety, as well as simplicity and reliability of the design.

The usual dimensions of GVL are 2500 × 1200 × 12.5 / 10 and 1200 × 1200 × 10 mm. Small-format sheets are convenient on floors where it is important to control the evenness of the base, and in small areas it is more convenient to do this. Gypsum-fiber sheets are produced by Knauf, Saint-Gobain (trade mark Gyproc), USG. Sheet price 2500 × 1200 × 12.5 mm - from 470 rubles.

Selection criteria for sheet material

Photo: KNAUF. Installation of a prefabricated sub-floor made of small-format Knauf superlists (GVLV) with a straight longitudinal edge

The choice of a particular sheet material is determined by many factors. For example, in country houses permanent residence it is practically unlimited. It is only important to take into account the specific operating conditions of sheets for finishing. For rooms with normal humidity, an ordinary GKL is suitable, with an increased one, as in bathrooms and kitchens, - GKLV.

In homes, it is advisable to pay attention to the frequency and duration of these periods, say a six-month stay from spring to autumn or rest every weekend throughout the year. If, in the absence of the owners, the minimum required temperature of +5 ° C is maintained for a week, it is permissible to use moisture-resistant drywall.

If the temperature in the house is not much higher than the outside temperature, experts recommend using GVLV. They can withstand fluctuations in temperature and humidity without significant deformation. Note that an insignificant increase in geometric dimensions with an increase in humidity is a natural process not only for GCR, but also for GVL, but in the latter it is significantly less. In such close to "extreme" conditions, they will last longer and will be a more stable and reliable base for finishing.

In corridors, storerooms, boilers, the impact resistance of sheet materials is important. GVL, as harder, durable material, transfers loads and accidental shocks without significant consequences, which means that it increases the maintenance-free service life of the finish.

Photo: ShutterStock / Fotodom.ru. Before installing the sheets, wiring and other communications are placed in the cavity of the frame. This process is much easier and faster than laborious wall chasing.

Accuracy comes first

Often among craftsmen who are accustomed to working with drywall, when switching to gypsum-fiber sheets, the amount of damaged material increases. The fact is that drywall forgives a rather careless attitude during transportation and installation, mainly due to the cardboard cladding. Whereas gypsum fiber sheets are harder material. Claddings and partitions made of it withstand increased mechanical stress, you can hang heavier objects on them, but you should handle the gypsum fiber sheets more carefully and carefully during transportation and installation.

Onsite, gypsum fiber sheets and drywall should only be stored horizontally (flat) on a flat surface.

The basic principles of working with gypsum fiber sheets are identical to working with drywall. For installation use the same metal profiles: rack and rail. But for fixing gypsum fiber sheets to frames, there are special self-tapping piercing or drilling screws with a double thread and a countersink head. Professionals know about this. But amateur craftsmen can mistakenly take ordinary drywall screws. However, drown them in solid body the sheet will not work. The hats will protrude. And so that they do not peep through the finishing layer of paint or wallpaper, the surface will need to be leveled with a rather thick layer of putty. Spend time and money on additional work you will not have to if you purchase screws intended for GVL with a special thread and a reduced head.

Andrey Udalov

Product manager for dry construction at KNAUF