Using hl. Knauf sheets. GVL or gypsum board: which is better

The term “dry” construction has been known since the last century, but in our country it began to be used only in the 90s. A person not associated with or construction work, you may ask, gypsum board – what is it? GVL, GKVL, GKLO - it’s easy for a novice builder to get confused in all these terms. Drywall or gypsum fiber are used for leveling geometric shapes premises without use large quantity And

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GKL - what is it? GVL, GKVL, GKLO: similarities and differences between concepts

The principle of dry construction has gained popularity due to a number of advantages:

productivity increases several times finishing works;
plasterboard and gypsum fiber are made from environmentally friendly materials;
possibility of closed installation of pipe distributions;
the load component is reduced several times by;
small amount of dust during installation;
no need to use special concrete mixers;
Wall surfaces are not damaged when finished dry.

Important! During “dry” construction, all materials are easily matched to the geometry of the room. Even an unprofessional specialist can carry out the work.

So what is the difference between these concepts?

GVL is harder and more durable than gypsum board, so it should be used for finishing surfaces with increased mechanical stress. In addition, due to the homogeneity of the layer, it can be sawed in any direction. Drywall has less strength; cut lines on it can only be made transversely, since a longitudinal cut breaks the reinforcing cardboard layer.

One of the remarkable features of gypsum plasterboard is that when moistened, the sheets acquire the necessary lamellarity, and when dry, they restore their original characteristics. Due to this, plasterboard is especially loved by designers for performing complex architectural forms curvilinear design. For curved structures, plasterboard with a width of 600 millimeters is usually used.

Drywall is ideal before further pasting. No additional treatment is required, just coat the nail heads with a neutralizing compound to prevent corrosion. Instead, you can paint the panels using an oil or adhesive base.

There is no clear opinion which is better, plasterboard or gypsum fiber. Both materials exhibit excellent performance. The main thing for various conditions choose the “right” material.

What is gypsum board in construction? Concept and classification

GKL - sheets of plasterboard, consisting of a gypsum core lined with cardboard. Standard sizes 1200x2500 millimeters. This is an excellent assistant for leveling wall surfaces, creating partitions, making arches,. Simple installation makes it quite popular in finishing work.

Drywall is offered in four versions:

regular drywall;
GKLV. What it is? This is a moisture-resistant plasterboard, the surfaces of which are treated special composition. Manufacturers paint it green;
fireproof plasterboard or gypsum board, painted red. Resistant to open fire for 20 minutes;
universal drywall or GKLVO– has both fire-resistant and moisture-resistant qualities.

The concept of GVL: what it is and assessment by professionals

GVL is very similar to plasterboard, but gypsum fiber sheets contain cellulose reinforcement and special additives. Such sheets are not lined with cardboard; they have a uniform texture. Their strength is four times higher than that of drywall. The edge can be straight or folded. It is impossible to make shaped elements from gypsum fiber board, since they are difficult to bend.

For production, gypsum grade G4 and higher is used. The material meets all environmental safety requirements. With the help of GVL, you can install complex interior partitions and correct the geometry of the walls. They are suitable for finishing work in industry, social and residential facilities, medical and children's institutions, and health resorts.

Let's try to figure it out characteristics of GVL. The classification of materials will help you understand what this is. Gypsum fiber comes in the following varieties:

standard GVL;
gypsum fiber with additional treatment with a water-repellent compound (GVLV) for rooms with high moisture content;
GVLV EP or KNAUF superpol.

GVL and gypsum board: what is the difference? Comparative characteristics

The most basic difference is in the production of the sheet. Due to its properties, GVL is shock-resistant, so it is recommended to be used for the manufacture of partitions. In addition, it is easy to cut; cuts can be made in any direction. For small structures this is the best material.

Comparison of the characteristics of gypsum plasterboard and gypsum fiber board, differences in the main indicators:

Characteristic	GVL	GKL
Density, kg/m3	720	650
Swelling in aqueous media,%	30	30
Thermal conductivity	1,4	1,45
Fire resistance	high	low
Hardness	solid	soft
Treatment	Cuts well, less plastic	Cuts well and bends well
Performance characteristics	Long service life	Short service life, cannot be used for outdoor work
	The painter's helmet should be applied to a paper base	Good coloring
	It is necessary to prime the base before pasting

The main differences between GVL and GCR are their production technology. To make the first, gypsum is pressed and cardboard is glued onto it. In the production of gypsum fiber, gypsum is mixed with cellulose, which acts as reinforcement. Additives are added to the composition to increase strength and adhesion, after which the mixture is pressed.

Drywall is convenient to use before subsequent finishing or other materials. Thanks to the smooth surface, the walls do not require additional treatment.

GKL or GVL: which is better and for what conditions are they suitable?

With the help of gypsum board or gypsum fiber, you can solve all the main tasks of finishing or finishing. For long and successful operation, it is important to use materials taking into account their technical characteristics.

durable sheet suitable for leveling wall and ceiling surfaces, holds its shape well, is not subject to deformation;
flexibility and elasticity allows you to create complex design solutions;
uncomplicated and quick installation using or glue;
when cutting, the material may crumble;
GKLO – resistant to open fire.

Gypsum fiber:

has increased strength, it is recommended to lay it on the floor as a rough covering;
GVL has increased strength and greater weight. Resistant to temperature changes;
less flexible than gypsum board;
frost resistance is 3 times higher than that of drywall;
increased moisture resistance. GVL has additional sound insulation properties.

Ceilings

GCR - lightweight panels are more suitable for ceiling surfaces; they do not create additional load on. The light weight of the plates makes them quite convenient to install. In addition, plasticity will allow you to create multi-level curved shapes.

Partitions

If necessary simple elements with straight lines, choose GVL, which has sufficient rigidity and good quality. If you need to make architectural lines with curved edges, it is better to choose.

Bathroom

GVL has increased moisture resistance, especially for making subfloors. Gypsum fiber does not absorb moisture, the panels are not subject to deformation. Drywall with moisture-resistant characteristics is also suitable for wet rooms, but only as a rough finish for.

Floors

Due to its strength, gypsum fiber board should be used for flooring.

Decorating a wooden house

To finish the interior surfaces of a wooden house, both plasterboard and gypsum fiber are used for their intended purpose. To increase fire resistance, you should choose fire-resistant materials GKLO. The use of drywall or gypsum fiber board on the walls depends on the tasks of highlighting certain zones in the room. The main geometric finishing can be made from gypsum plasterboard, and arched structures can be made using plasterboard. Combined finishing will save money on expensive materials.

Comparative technical characteristics of materials

To perform high-quality finishing, experts recommend purchasing materials famous manufacturers only at specialized points of sale. Only in this case the products will be of sufficiently high quality.

Geometric dimensions

Currently, there are no documents regulating the size of gypsum boards. Manufacturers have adopted an unspoken standardization of drywall, highlighting the main dimensions.

By individual order It is possible to produce gypsum board sheets with dimensions of 1500×600 millimeters. In addition, you can order sheets up to 4 meters long.

Separately, we need to talk about gypsum boards for walls. The 12.5 mm thickness is used for easy leveling of surfaces. For ceiling structures a thickness of 9.5 mm should be used. The thinnest drywall is used for shaped structures. If you need to make a partition with additional sound insulation, you can install two sheets of plasterboard.

Dimensions of moisture-resistant plasterboard are offered in standard or individual versions with a thickness of 9.5 or 12.5 mm. Manufacturers offer plasterboard with increased impact resistance and moisture resistance with a thickness of 13 millimeters.

GVL has increased strength and elasticity. Currently, there are two types of gypsum fiber on the market: standard and moisture-resistant. Manufacturers offer GVL in the following geometric parameters(in mm):

Dimensions of GVL sheet for walls in standard version: 1500×1200x10 mm

It is possible to produce gypsum fiber according to non-standard sizes(in mm):

with length: 500, 1000, 1200;
width: 500, 600;
thickness can be up to 25.

Weight of gypsum board and gypsum board

The weight of a gypsum board sheet is directly dependent on the thickness and physical characteristics. In standards it is customary to indicate weight square meter drywall:

with a thickness of 6 mm – a square meter weighs 5 kg;
respectively, for thicknesses of 9.5 and 12.5 mm the weight will be 7.5 and 9.5 kg.

It is not difficult to perform calculations for a sheet of drywall.

Dimensions, mm/area, sq.m	GKL sheet weight, kg
Dimensions, mm/area, sq.m	Thickness 6 mm	Thickness 9.5 mm	Thickness 12.5 mm
1200×2000 / 2.4	12	18	23
1200×2500 / 3	15	22	29
1200 x3000 / 3.6	18	27	35

Individual sizes are determined in a similar way. Knowing the area of the gypsum board sheet and the weight of 1 m2, you can easily determine all other parameters.

For GVL weight 1 sq.m. for thicknesses of 10 and 12.5 mm it is 10.8 and 15.6 kilograms, respectively.

The difference with gypsum board is more than 2 times per 1 square meter. Therefore, GVL is not recommended for installation of ceiling structures.

Strength of materials

Thanks to cellulose reinforcement, GVL has increased strength and rigidity, unlike plasterboard. However, gypsum fiber is significantly inferior to gypsum plasterboard in bending. GVL cannot be used for curved structures. Plasticity adds fragility to plasterboard; during transportation and loading and unloading operations, the sheets should be moved very carefully. This is the main difference between gypsum board and drywall.

Gypsum fiber is a homogeneous material, unlike cardboard-coated gypsum board. The density of gypsum plasterboard is 1250 kg/m³, which significantly exceeds the density of plasterboard. Accordingly, the strength of gypsum fiber is higher. The tensile strength parameters under bending loads for gypsum fiber boards are 5.5 MPa, and for gypsum plasterboards – 2 MPa.

Flammability

For the Civil Code, the following requirements apply in relation to the following classification groups:

G1– low flammable;
AT 3– flammability;
D1– low smoke generation;
T– low toxicity.

GVL contains 80% gypsum, respectively, its technical specifications fire safety higher.

G1– low flammable;
IN 1– difficult to flammable;
D1- low smoke generation;
T- low toxicity.

Thus, we see that the fire-technical characteristics of gypsum fiber are higher. GVL should be used in places of possible evacuation of people and in rooms with high danger fire.

Frost resistance

Manufacturers guarantee up to 15 operating cycles for gypsum fiber without loss of physical characteristics. While for gypsum board there are only 4 freeze-thaw cycles. This gives GVL additional benefits in front of the gypsum board.

Drywall feels better when room temperatures without hesitation, it was originally created for finishing interior surfaces.

Water absorption

The water absorption rate for drywall with moisture-resistant characteristics should not be higher than 10%. If necessary, you can calculate the softening index, which equal to the ratio compressive strength of the sheet in a wet and dry state.

For gypsum board this parameter is 0.45. Which indicates low strength with strong moisture. For GVL this value is 1.

Thermal conductivity

The technology for installing gypsum boards on the ceiling is carried out frame method on metal guides. With the help of drywall you can arrange complex multi-level structures.

After installation, the suspended ceiling must be painted with finishing paint.

Article

Drywall is a popular and practical material for leveling ceilings, walls, devices internal partitions. The sheets have a unique set of technical and performance characteristics, as well as an affordable price. You can buy inexpensive plasterboard from well-known brands in the RDS Stroy online store.

Drywall is classified according to international standards, its main types are marked by color.

Regular drywall plasterboard. The sheets do not contain modifying additives and can be used in rooms with a humidity level of no higher than 70%. Drywall is used for installation suspended ceilings, devices interior partitions, leveling surfaces. The color of the sheets is grey.
Moisture-resistant plasterboard GKLV. The material contains fungicidal and water-repellent additives, so it can be used in rooms with increased level humidity: bathrooms, kitchens, toilets. Gypsum board of the GKLV brand has green color, used for covering walls and window slopes.
Fire-resistant plasterboard GKLO. During the production process, a reinforcing additive, usually glass fiber, is introduced into the mass. The additional component gives the sheets fire resistance and reduces the risk of fire when exposed to extreme high temperatures. Drywall is painted red and is used in the decoration of public premises and buildings with increased fire safety requirements.
Fire-moisture resistant plasterboard GKLVO. Moisture-resistant sheets with increased fire resistance are classified as materials special purpose and are not produced by all manufacturers. In particular, such drywall is available in the Knauf product range.

Where to buy drywall

The RDS Stroy online store offers to buy drywall from the following brands in Moscow:

Drywall Volma. The products of the Volgograd Gypsum Plant are in high demand not only in Russia, but also in the CIS countries. The quality of drywall is comparable to European analogues.
Drywall Knauf . The international concern needs no introduction - the brand has already become synonymous with quality and reliability in the field of building materials.
Gyproc drywall. The brand belongs to the Saint-Gobain group and introduces innovative gypsum-based building materials to the market. The products comply with international and Russian quality standards.

If you need specialist advice, call us or leave a request for a call back on the website. IN work time We will be happy to advise you on the cost, delivery and pickup of drywall.

Tsugunov Anton Valerievich

Reading time: 5 minutes

More and more home craftsmen are choosing “dry” technologies when making repairs and replacing traditional plaster and cement mortar gypsum-based slabs. With the help of plasterboard you can easily level walls and ceilings, build suspended structures, niches and boxes, partitions and built-in wardrobes. For finishing rooms with high humidity, GKLV is used - a moisture-resistant type of drywall.

Types of drywall

Since the invention of drywall in 1894 by American engineer O. Sackett, the material has changed significantly. Today in construction stores you can buy 4 types of sheets with different characteristics:

Ordinary drywall - gypsum plasterboard. They consist of a gypsum mixture enclosed between two layers of cardboard. A standard sheet of such material has dimensions of 1200 × 2500 mm with a thickness of 9.5 mm. Suitable for repair work V living rooms. It cannot be used in the bathroom or toilet: cardboard and plaster do not tolerate a humid environment.
Moisture-resistant drywall, denoted by the abbreviation GKLV. It is easy to distinguish it even without reading the markings: the sheets of this material are painted light green. Hydrophobic impregnation protects cardboard and plaster from moisture. At the same time, it increases the weight of the product.

A standard sheet of plasterboard with a thickness of 9.5 mm weighs about 22 kg, and a GKLV element of the same dimensions will “pull” 27.

. It is used for cladding fireplaces and stove walls in rooms with high air temperatures, public buildings with great traffic. Its leaves are colored reddish.
GKLVO are universal sheets that can simultaneously withstand high temperatures and moisture. Used in baths or saunas, in boiler rooms, for cladding wooden houses to protect them from fire, in wet rooms with increased fire safety requirements.

When choosing the type of drywall, it is important to consider its suitability for the application. There is no point in using moisture-resistant or fire-resistant material in ordinary rooms. Given the higher price, the investment will be unjustified: the unique qualities of the sheets will not be used. Why overpay for material properties that are not useful in a particular room?

Decoding the GKLV marking

Let's look at an example. Let's assume that we have in front of us a sheet of drywall with the inscription:

GKLV-A-PK-2000 × 1200 × 9.5 GOST 6266-97 DIN 1 81 80

The decoding of this marking looks like this:

Moisture-resistant drywall.
Accuracy class A.
Straight sheet edges.
Length – 200 cm.
Width – 120 cm.
Thickness – 9.5 mm.
The product has a technical certificate of conformity GOST 6266-97 DIN 1 81 80

With its help, a full range of work is carried out, typical for conventional drywall: leveling ceilings and walls, constructing partitions, niches, boxes and multi-level structures.

GKLV is indispensable for the repair of premises experiencing high operational loads: offices, warehouses, production workshops. The properties of the material make it possible to regularly carry out wet cleaning without the risk of damaging the interior finish.

GKLV "Knauf": new designation, features, price per sheet

The durability of the structures being erected is ensured not only by the high quality of the material, but also by compliance during installation with the conditions prescribed in SNiP 02/23/2003 “ Thermal protection buildings." Knauf gives the following recommendations:

The temperature in the room being repaired must be above 10 °C.
Drywall sheets are left to rest at the installation site for at least a day. This will allow them to acclimatize and not change their linear dimensions further.
The edges of the ends of the GSP-N2 plasterboard are rectangular, therefore, for high-quality sealing of the seam after installation, they are first chamfered. Its angle of inclination is approximately 45˚, and its depth is 1/3 of the sheet thickness.

Cost of GKLV from Knauf in Moscow:

behind standard sheet 2500 × 1200 × 12.5 – from 280 to 350 rubles;
per sheet 2500 × 1200 × 9.5 – from 275 to 350 rubles.

HELPFUL INFORMATION: Plasterboard ceiling in the bedroom: design, 7 photos

GKLV "Volma" (compared with "Knauf")

Some novice craftsmen believe that Volma and Knauf drywall differ only in price, and for the second it is higher solely because of the “promotion” of the brand. Indeed, GKLV "Volma" is cheaper:

sheet 2500 × 1200 × 12.5 costs from 216 to 330 rubles;
price per sheet 2500 × 1200 × 9.5 – from 210 to 325 rubles.

A sheet of plasterboard is a rectangular element consisting of two layers of special paper with a layer of gypsum paste, with additives to strengthen the edges. GK is produced according to the established standard GOST 6266-97 and complies with German standards DIN 18 180. Drywall is made with a semicircular edge, which is the most technologically advanced in terms of reliability. Another important component of this material is facing cardboard; it provides a good base for applying the following materials: gypsum, wallpaper, paint, ceramic tiles, etc. It is also an environmentally friendly material and is ideal for residential buildings.

Why is it important to buy high quality drywall?

Knauf plasterboard is the best alternative in the field finishing materials. Depending on the scope of use, it can be used: moisture-resistant, fire-resistant and standard version.

Until relatively recently, the most popular building materials were wood, brick and plaster. However, their cost is not always justified, and the work requires a lot of time and effort. Which, in fact, became the main reason for searching for an alternative solution. Currently, materials from Knauf companies are in particular demand among builders; their cost is consistent with their high quality. Working with this material does not require special knowledge or a lot of time. In addition, you can find it in a regular hardware store with prompt, targeted delivery, for example, in one like ours.

Before buy drywall in Moscow cheap with delivery, should be paid Special attention the quality of the purchased material. In particular, it is worth paying attention to the following characteristics: drywall cost(high quality products cannot be too cheap), type of material (type of drywall and edges), availability of a certificate. It is the quality of the purchased material that will determine how difficult it will be to work with it, as well as the service life of structures made from it (walls, ceilings, interior partitions).

Types and features of using drywall

Depending on the purpose and area of use, there are three main types of plasterboard: regular, fire-resistant and moisture-resistant.

Regular - gypsum board

This material is used when performing interior finishing work in residential premises, where temperature and humidity levels do not exceed acceptable limits. GK is a multilayer building material consisting of a gypsum core placed between two layers of building cardboard different thicknesses. In particular, it is indispensable when finishing ceilings, walls, or when constructing light interior partitions. Wherein price per sheet of drywall depends on the thickness of the material, the country of manufacture and the volume of products purchased. In our company you can buy hl By affordable price with delivery.

Moisture resistant - GKLV

This type of drywall is used for finishing rooms with high levels of humidity: kitchens, bathrooms. It contains special fungicidal and hydrophobic additives, which provide it with resistance to moisture. However, when decorating premises, to achieve more high level protection from moisture, additional finishing is recommended: cladding ceramic tiles or surface painting. Order or buy gypsum plasterboard in Moscow In our company you can do both retail and wholesale.

Fire resistant - GKLO

GKLO - Drywall cost GKLO is the highest compared to other types of this material. This is due to the complexity of manufacturing and increased requirements for the quality and characteristics of such material. It is used for finishing electrical panels and ventilation shafts. Price per sheet of drywall in this case, it will also depend on the volume of products ordered, the urgency of delivery, and the country of the manufacturer.

Benefits of using drywall

Among the positive aspects of using this material, the following points can be highlighted:

Manufacturability of finishing due to the absence of “wet processes”;

Wide range of possibilities use (finishing walls, ceilings, constructing decorative or interior partitions);

Acceptable price. To perform finishing work in rooms with normal humidity levels, you can buy hl, at an affordable cost;

Availability of material. Today buy drywall in Moscow It is possible both in a stationary store and via the Internet, which will be a more profitable solution in terms of price and speed of delivery.

Attention: If you regular customer, offers and prices for you will be formed individually.

Recently, “dry” construction and finishing technologies have become increasingly popular. This is understandable. With less time spent, the result is very decent. You just need to choose the right materials. If you want to level the walls, ceiling, make a floor or sheathe a frame, but do not want to use potentially hazardous materials containing formaldehyde, you will have to choose from sheet materials made from gypsum. These are gypsum fiber (GVL) and plasterboard (GKL). But deciding which is better to use - GVL or gypsum board - is not so easy. Both materials have their pros and cons. And, the most reasonable thing is to use both, but in those areas where their properties will be in demand.

GVL and gypsum plasterboard: what is it in construction

Drywall and gypsum fiber are relatively new building materials. They appeared a couple of decades ago, but have already confidently supplanted traditional materials. To understand the best way to use GVL or gypsum board, you need to have a clear idea of what kind of materials they are, what their advantages and disadvantages are. Based on this knowledge, you yourself will be able to accept optimal solutions. Because it is impossible to say unequivocally which is better - GVL or gypsum board. In some places one material is more suitable, in others it is better to use a second one. So let's figure out what these materials are and what types of gypsum board and gypsum fiber board exist.

GCR: what is it and what types are there?

GKL is an abbreviation of the name Gypsum Cardboard Sheet. This material consists of two cardboard sheets, between which there is a layer of gypsum. They are connected to each other using construction adhesive. It is often called “plasterboard”, or the abbreviation gypsum board is used, sometimes you can hear “gypsum board”. The latter name is found zonally - more common in St. Petersburg and its environs. In this region, plasterboard was supplied by the Finnish company Gyproc, which gradually became a household name.

GCR is used for “dry” leveling of walls or cladding of frames when frame housing construction. Suitable for interior use, too fragile for exterior use. Drywall is used for walls, partitions, and ceilings.

In the production of gypsum boards, thick and smooth cardboard is used. It serves as a reinforcing and shaping element. The gypsum layer gives strength and keeps its shape. In most cases, a sheet of drywall has a thinner edge on the long side (there are also even ones with right angles). This allows you to carefully putty the joints when joining. So for some types of finishing materials it is not necessary to putty the entire area.

GKL can have different edges. You need to choose it depending on the area of use

They produce plasterboard for different conditions operation, cardboard is used for easy recognition different color(gray, green, pink):

For rooms with normal conditions operation - standard gypsum board. Has a gray color.
For rooms with high humidity levels - moisture-resistant gypsum plasterboard. It turns green.
For fire hazardous premises/buildings - fire resistant - GKLO. Has a pink color.
In rooms with high fire hazard and high humidity, use GKLVO - fireproof, moisture-resistant plasterboard.
Recently, soundproofing plasterboard (GKLZ) has become popular. It has a high-density gypsum core and is reinforced with fiberglass. Designed to increase sound insulation of frame-sheathing structures of walls, ceilings and partitions. The leaf is purple or blue in color.

GKLZ - soundproofing plasterboard. KNAUF sheet (GSP-DFH3IR) has the following properties: increased density, moisture resistance, impact resistance, increased strength

Now you know what gypsum plasterboard is, what types of drywall there are and where they are used. This is a popular material for interior decoration. It does not contain harmful substances, although gypsum dust that may appear during operation may pose some danger. To decide what better than GVL or GVK, now let's talk about gypsum fiber.

GVL - what is it, what is it made from, what types are there

The name GVL is also an abbreviation for the technical name of sheet building material: Gypsum Fiber Sheet. This material is made from a mixture of gypsum with cellulose fibers (fluffed waste paper). The mass is mixed with water, sheets are formed from it under a press, which are brought to normal humidity (dried).

Types of edges - for walls it is better with a chamfer, for floors - even

GVL is also used for dry leveling of walls and ceilings, cladding frames, and flooring. Unlike gypsum plasterboard, it has “basic” non-flammability, since cellulose is covered with a layer non-flammable material- plaster. GVL is produced with two types of edges - flat and folded. The seam edge is removed with a plane, the chamfer depth is about 2 mm, the width is about 30 mm. When installing on walls, this allows you to further strengthen the seam (lay a reinforcing mesh) and putty it.

Gypsum fiber boards acquire special properties with the help of special additives. Based on this feature, there are the following types:

Standard - GVL. For installation in rooms with normal humidity.
Moisture resistant - GVLV. Used in rooms with high humidity levels to level the floor without screed.
High-strength, moisture-resistant material for flooring. It is marked with GVLV EP (moisture-resistant GVL Floor Element).

Externally, moisture-resistant sheets are no different from standard ones. If the manufacturer is normal, there is a marking on the sheet, which, in addition to the size of the sheets, indicates the type - GVL or GVLV. They also differ in the type of surface: GVL can be polished or unpolished. Polished ones (Knauf) are much higher in price, but do not require mandatory puttying of the entire surface before finishing work.

GVL and gypsum plasterboard: properties and comparison

So far there is no noticeable difference between GVL and GKL. Both - sheet material, which can be used for cladding walls and ceilings. Only gypsum fiber is suitable for flooring, but plasterboard is not. This is just the beginning. Let's understand further.

Density, strength

If we compare gypsum fiber board and gypsum plasterboard, then gypsum fiber has a higher density, and, accordingly, with the same thickness, greater strength and weight. Greater strength - it seems to be good. In any case, the GVL is not so easy to penetrate with a blow. Another plus is that frame wall, sheathed with GVL, you can safely hang shelves.

On the other hand, higher density means installation is more difficult. Not every self-tapping screw can be screwed into a gypsum fiber board without pre-made holes. You can do without drilling, but only if you use self-tapping screws and a powerful screwdriver. Moreover, without preliminary countersinking (drilling a hole larger diameter) it will not be possible to “drown” the cap in gypsum fiber. When sheathing gypsum fiber board in two layers without pre-drilling holes, it may happen that the screw screwed into the second sheet “tries” to press out the bottom one.

Drywall has less strength and can be punched through with a punch. But ordinary self-tapping screws easily fit into it. When installing gypsum boards, the most important thing is not to overtighten or tear the cardboard with the screw head. Otherwise, it falls into the gypsum layer, which bursts. You have to turn it somewhere else. If you mess up like this several times in a row, you will have to change the sheet, as it simply won’t stick.

And, by the way, on a wall sheathed in one sheet of gypsum fiber board, a properly installed special dowel (butterfly or also called daisy) can withstand a weight of 80 kg for a long time. The question is that technology must be followed.

Weight of gypsum board and gypsum board

Now let’s talk about why high density is bad. The first disadvantage has already been described: it is more difficult to install fasteners. The second - high density - is large mass. That is, to install GVL under the same conditions, a more powerful frame is required. When transporting, you will have to take into account the tonnage; heavy sheets are more difficult to work with. The weight of one sheet of gypsum fiber board is tens of kilograms. For example, Knauf gypsum fiber boards have the following parameters:

a sheet measuring 2500*1200*10 mm weighs about 36 kg;
GVL 2500*1200*12.5 mm has a mass of 42 kg;
a floor element 1550*550*20 mm has a mass of about 18 kg.

Plasterboard sheets are much lighter (see table).

If we talk about the mass of a square meter gypsum fiber sheet, it can be calculated using the formula:

The mass of a GVL square cannot be less than 1.08*S,
but cannot be more than 1.25*S.

Where S is the nominal sheet thickness in millimeters. So the range of values is quite easy to determine. However, for some reason, manufacturers do not indicate the weight of one sheet. This data can only be found from Knauf. According to their information, the picture looks something like this:

GVL thickness 10 mm - 12 kg/m²;
GVL thickness 12.5 mm - 14 kg/m²;
EP thickness 20 mm - 21.5 kg/m².

When compared with the average weight of gypsum boards, fiber gypsum boards are 3.5-4 times heavier. Lifting even one sheet alone is already a problem. Even if you figure out how to do it without breaking it. Naturally, they need to be mounted on a more powerful base.

Flexibility and fragility

Drywall, due to the fact that the gypsum is between two layers of cardboard, is more flexible. Cardboard performs the task of reinforcement, taking a significant part of the load on itself. Especially under bending loads. For example, a sheet of plasterboard can be lifted from one side by grasping the short side. It will bend, but will not crack. If you try to carry out the same operation with a gypsum fiber sheet, it will crack.

Another advantage of gypsum board is that it can be used to finish curved surfaces. There are several technologies that make it possible to make arches, columns, and smoothly curved reliefs on walls and ceilings. GVL does not provide such an opportunity. It takes bending loads very poorly both along and across the sheet: the cellulose fibers are very short and the board simply breaks. So if you need to finish curved surfaces, the choice between gypsum fiber board or gypsum board is easy to make in favor of the second.

Sound insulation and thermal conductivity

When choosing a material for cladding, indicators such as thermal conductivity and sound insulation are important. As is known, they depend on the density, since GOSTs allow a fairly wide range in the density of gypsum fiber boards; these characteristics must be looked at for each specific manufacturer. To give you at least a rough idea, there is the following data:

Thermal conductivity GVL with a density from 1000 kg/m3 to 1200 kg/m3 has a thermal conductivity from 0.22 W/m °C to 0.36 W/m °C.
The thermal conductivity of gypsum plasterboard is approximately in the same range - from 0.21 to 0.34 W/(m×K).

If we talk about sound insulation, the same picture is observed: the characteristics are approximately equal. GVL gives only 2 dB better protection compared to gypsum board. It is also worth remembering that you can find acoustic drywall if you wish. He has special characteristics, used for lining stores, concert halls, studios. If we talk about private housing construction, it should be used in bedrooms.

If you look at the characteristics, there is no difference in sound insulation between gypsum plasterboard and gypsum fiber board. But this parameter takes into account the “conduction” of sound. There really isn't much difference here. That's how it feels. And significant. A room lined with gypsum fiber boards is much quieter. It's not as loud. Sounds are reflected from smooth cardboard, but “get stuck” in the non-uniform surface of fiber boards. So if silence in your home is important to you, when choosing between gypsum fiber board and gypsum board, opt for gypsum fiber.

GVL or gypsum board: which is better?

Both materials have admirers and opponents. You will have to decide on your own which is better GVL or gypsum board. In this section we will try to compare them according to the most significant parameters. Let's go over the sizes right away. Drywall is produced in a wider range of both sheet sizes and thickness:

GKL sheet thickness: 6.5 mm, 8 mm, 10 mm, 12.5 mm, 14 mm, 16 mm, 18 mm, 24 mm. The last three are very rare.
The height of the gypsum board sheet can be from 2000 mm to 4000 mm in increments of 50 mm.
The width of the gypsum board is 600 mm or 1200 mm.

As you can see, the range is more than wide. Another thing is that there are usually two or three types on sale. But, if you really want to, everything can be found/ordered. Although, it is usually easier (and cheaper) to buy what is available.

We had less luck with the size of the GVL. We have only two options for gypsum fiber boards: 2500*1200 mm (standard) and 1500*1000 mm (small format). Both options are available in 10mm and 12.5mm thicknesses. All. There are no other standard sizes. There is also GVL for the floor. Its dimensions are 1200*600 mm, thickness 20 mm. It may be chamfered or not.

	GKL	GVL
Cost per square	from 70 rub/sq.m.	from 180 rub/sq. m.
Shock loads	crumbles	tolerates it well
Bending loads	tolerates well, bends	breaks down
Uncover	easy to cut with a utility knife	you need a serious tool with a special disk
Installation of fasteners	special screws are easy to tighten	difficult to twist, you need to pre-drill holes or use self-tapping screws
Changes in size with increasing humidity/temperature	1 mm per meter	0.3 mm per 1 meter
Fire resistance	high - G1	non-flammable - NG
Installation on curved surfaces	available	No

As a result, it is possible to say that gypsum fiber board or gypsum board is better only based specifically on the area of application and operating conditions. In short, here's how you can divide the areas of application:

GVL for walls and ceilings is better if fire resistance is required or if it is necessary to increase the rigidity of the structure (in frames).
It is better to put GVL on the floor, since it reacts less to humidity and does not change its properties.
GCR is indispensable if you need smooth lines or complex multi-tiered structures. , arches, columns, rounded walls and corners - this is just drywall.
If you need to achieve good sound insulation of the second floor, it is better to hem the ceiling with gypsum fiber board.

As you understand, there is no way to definitively say which is better than GVL or gypsum board. In some conditions, one material is better for performing one task, while the characteristics of another are more suitable for another.