When performing interior decoration, “dry” technologies are becoming more and more popular, making it possible to level surfaces at an accelerated pace and reduce the number of operations. Therefore, plasterboard and gypsum fiber sheets are in high demand. GKL differs significantly from GVL in characteristics and scope of application.
Both types are made from gypsum stone, a natural mineral of sedimentary origin consisting of calcium sulfate hydrate. The powder obtained by crushing stone is called construction plaster. It is used to produce building mixtures, as well as gypsum plasterboard and gypsum fiber boards used for interior work.
Plasterboard sheet
The product is a core (a plate molded from gypsum with the addition of a special filler), covered on both sides with cardboard. The cardboard layer adds smoothness and makes it stronger. It is intended exclusively for indoor use as it is not sufficiently resistant to moisture and stress. You can level the walls, suitable for making suspended ceilings, light interior partitions.
When choosing, pay attention to which category it belongs to:
- GKL - standard; designed for low and normal indoor humidity;
- GKLO – with fire-resistant impregnation; used for cladding frame houses, interfloor ceilings, shaft walls, load-bearing metal systems, insulation of external structures from the inside;
- GKLV - special moisture resistant, with low water absorption rates; for finishing kitchens and bathrooms.
Advantages of gypsum boards:
- Environmental safety. Neither the core nor the cardboard “wrapper” contain substances harmful to health (for example, formaldehyde).
- Fire resistance. It is due to the high content of chemical bound water(up to 2 liters in a stove). Until it turns into steam, the temperature on the other side will not rise above 100°. Standard gypsum boards can withstand 20 minutes of fire before destruction, and gypsum boards - 50 minutes.
- Humidity level regulation. Thanks to their porous structure, walls absorb excess moisture, and if the room becomes too dry, then they release it.
- Flexibility in processing. It bends perfectly, allowing you to achieve the most incredible design ideas. Arches and other convex shapes are created from wet plasterboard sheets. The slabs can be cut well with a sharp knife or grinder and adjusted to size, facilitating the installation of columns and niches.
- Easy to apply coatings. The walls are easy to putty, paint and prime – this is facilitated by a smooth surface.
The low strength of the structure does not allow the use of a hammer and nails in the process of hanging on the walls: it is better to use glue or self-tapping screws with dowels. To increase rigidity, they are most often mounted on a metal frame made of a profile.
Gypsum fiber sheets
They are produced by semi-dry pressing from a mixture of gypsum and fluffed cellulose waste paper, which reinforces and strengthens. Standard gypsum plasterboards have the following dimensions: thickness – 10 or 12.5 mm, width – 1200 (1000) mm, length – 2500 (1500) mm. The dimensions of small-format slabs are indicated in brackets.
Divided into three groups:
- standard (GVL) for finishing rooms with normal humidity;
- moisture resistant (GVLV) – thanks to impregnation, suitable for bathrooms and kitchens;
- elements for laying floors (GVL EP) - for forming prefabricated bases for floor coverings.
Sheets can be unsanded (NS), or sanded and primed on the front side (SH). Walls sheathed with the second option do not need to be primed before applying decorative coatings.
Specifications:
- GVL have increased hardness and strength; they do not require a reinforcing frame; self-tapping screws are screwed into them without dowels. They are difficult to bend when making arches, but do not bend under the weight of a person.
- Gypsum fiber is not covered with cardboard, so it is resistant even to open fire. Wooden structures can be sheathed with non-combustible material.
- Dense, massive slabs withstand temperature changes well: they resist cracks well even after 15 freeze-thaw cycles.
- Low thermal conductivity combined with heat resistance determines its use as a heat insulator.
- GVL absorbs sound well, reducing the noise level in the room by 35-40 dB.
- The moisture-resistant type, being in water for 24 hours, gains only 1.5% moisture.
Gypsum fiber “breathes” in the same way as drywall: it absorbs excess moisture in a damp room and releases it when the air becomes dry.
GVL attracts developers with a stronger structure: it is this that resists the destruction of the material. Over time, gypsum boards begin to crumble, turning into dust, which imperceptibly enters the respiratory system. GV slabs are more practical due to their resistance to bending and compression, due to their massiveness, good heat capacity, and excellent sound insulation characteristics. If plasterboard has decorative qualities, then gypsum fiber can withstand significant loads. Reinforced sheets are used not only in private housing, but also during the renovation of office, industrial, and public premises.
Differences in moisture resistance force one to choose in favor of GVL (especially GVLV). Fire safety is noticeably higher than that of conventional plasterboard: fire is inhibited due to physical characteristics.
GVL or plasterboard for walls and floors, which is better to use?
1. Finishing of production premises. Since gypsum fiber resists fire better, it is advisable to cover surfaces with this particular material in workshops.
2. Functional interior partitions. In terms of strength, sheets reinforced with cellulose win by a significant margin, so for reliable and long-term operation it is better to prefer GVL.
3. Decorative partitions, arches, figured structures. Such design ideas can be implemented only with the help of gypsum boards: their advantage is provided by the differences with gypsum boards in terms of flexibility.
4. Ceilings. To create multi-level suspension systems, lighter plasterboard is often used rather than gypsum fiber.
5. Thermal insulation finish. To sheathe walls in a country house or in a house with low heating, use gypsum fiber.
6. Floor insulation. Only durable gypsum fiber boards are suitable, the basis for which is wood, concrete, and expanded clay. Reinforced plate will serve as a heat insulator, frame, fire protection for finished floors - parquet, laminate, linoleum.
7. Finishing of wet rooms. GVL is used in this area almost without restrictions, and drywall is used only if it is marked with GKLV.
Cost of gypsum sheet materials
Price component when choosing best option also plays a role. Gypsum fiber is somewhat more expensive, but this is justified by its quality indicators. The table shows average prices for Moscow.
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 involved in repair or construction work may ask the question, plasterboard - 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 to level out the geometric shapes of a room without the use of large amounts of cement and plaster mortars.
Read in the article
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;
- opportunity closed installation pipe distribution;
- the load component on the floors is reduced several times;
- 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 creating complex architectural forms of curved structures. For curved structures, plasterboard with a width of 600 millimeters is usually used.
Drywall is an ideal base for walls before further wallpapering. No additional treatment is required, just coat the nail heads with a neutralizing compound to prevent corrosion. Instead of wallpaper, you can paint the panels with oil- or adhesive-based paint.
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 dimensions are 1200x2500 millimeters. This is an excellent assistant for leveling wall surfaces, creating partitions, making arches, and multi-level ceiling structures. Simple installation makes it quite popular in finishing work.
Drywall is offered in four versions:
- regular drywall;
- GKLV. What is it? 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.
Take note:
The concept of GVL: what it is and assessment by professionals
GVL is very similar to gypsum board, but the composition of gypsum fiber sheets includes 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 plasterboard, 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 interior partitions, complex ceiling structures, and correct the geometry of 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 understand the 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 important 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 |
| Processing | Cuts well, less plastic | Cuts well and bends well |
| Performance characteristics | Long service life | Short service life, cannot be used for outdoor work |
| Painting | The painter's helmet should be applied to a paper base | Good coloring |
| Wallpapering | 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 with wallpaper or other materials. Thanks to smooth surface, the walls do not need 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 zoning premises. 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 and is not subject to deformation;
- flexibility and elasticity allows you to create complex constructive solutions, arches of complex shape;
- simple and quick installation using self-tapping screws 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 profile systems. Light weight plates makes them quite convenient to install. In addition, plasticity will allow you to create multi-level curved shapes.
Partitions
If it is necessary to make simple elements with straight lines, choose GVL, which has sufficient rigidity and good soundproofing properties. If you need to create architectural lines with curved edges, it is better to choose drywall.
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 also suitable for wet rooms, but only as a rough finish for wall surfaces.
Floors
Due to its strength, GVL should be used for dry floor screeding.
Decorating a wooden house
For finishing interior surfaces wooden house Both drywall and gypsum fiber are used for their intended purpose. To increase fire resistance, you should choose fireproof 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 fiber board, and arched structures- using drywall. Combined finishing will save money on expensive materials.
Comparative technical characteristics of materials
To perform high-quality finishing, experts recommend purchasing materials from well-known manufacturers only at specialized sales points. 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 You can make gypsum board sheets with dimensions of 1500x600 millimeters. In addition, you can order sheets up to 4 meters long.
Separately, we need to talk about gypsum boards for walls. 12.5mm thickness is used for simple alignment 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: 1500x1200x10 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. Standards usually indicate the weight of a square meter of 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 | ||
| Thickness 6 mm | Thickness 9.5 mm | Thickness 12.5 mm | |
| 1200x2000 / 2.4 | 12 | 18 | 23 |
| 1200x2500 / 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 GKD, the following requirements apply in relation to fire-technical characteristics for the following classification groups:
- G1– low flammable;
- B3– flammability;
- D1– low smoke generation;
- T– low toxicity.
GVL contains 80% gypsum, respectively, its technical parameters fire safety is higher.
- G1– low flammable;
- B1– flame retardancy;
- D1— low smoke generation;
- T- low toxicity.
Thus, we see that fire technical specifications gypsum fiber above. GVL should be used in places where people can be evacuated and in rooms with a high fire hazard.
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 advantages over GCR.
Drywall feels better at room temperatures without sudden fluctuations; 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 is equal to the ratio of the 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 thermal conductivity index for gypsum plasterboard varies between 0.22-0.25 W/m*K. This is a good value, thanks to which, when carrying out finishing work, you can simultaneously increase the thermal insulation of the room, which will significantly reduce the budget for the work. In addition, if during installation you provide an air gap of 3-10 millimeters, this will additionally save heat. To improve the quality of thermal conductivity, you can make a layer of any insulation.
The thermal conductivity coefficient for gypsum fiber is 0.22-0.36 W/m*K. Thus, we see that the thermal conductivity value for gypsum fiber board is higher, which makes it indispensable for finishing wall surfaces and floor coverings.
Drywall can withstand loads of up to 30 kilograms per square meter. GVL is much stronger than drywall, and accordingly its load component is 3 times higher.
Scope of application of gypsum plasterboard and gypsum board
When choosing a material, you should proceed from the specifics of the room. To level the geometry of wall and ceiling surfaces and make subfloors in industrial and public premises, you should choose gypsum fiber.
In residential premises, shaped ceilings are best made from plasterboard; partitions and walls of straight geometry are made from gypsum plasterboard; for curved arches, gypsum plasterboard can be used. Buyers speak equally about the positive characteristics of both materials. The main thing is to choose the right one, taking into account the humidity and strength of the material.
Related article:
Photo good options, types of arched openings, materials from which they can be made, how to make an arch with your own hands from plasterboard and decorate it, advice from professionals - in our material.
From the point of view of environmental safety, both gypsum plasterboard and gypsum fiber board have the same properties. Thermal conductivity, especially when supplemented with a layer of insulation, is almost the same. In addition, both materials are non-toxic.
IN lately Manufacturers will improve gypsum boards and gypsum fiber boards, giving them improved qualities. For wet rooms, moisture-resistant plasterboard or gypsum fiber should be used. At high humidity, they are able to absorb water vapor, and when dry, they release excess.
GVL and gypsum board are sheet materials with which short terms Without unnecessary dirt and dust, you can finish the entire room, complementing it with excellent sound and thermal insulation.
Partitions and walls made of gypsum plasterboard and gypsum plasterboard
Like drywall, gypsum plasterboard for walls is used to level wall surfaces or install partitions. In rooms with high humidity, moisture-resistant gypsum plasterboard should be used. Gypsum fiber is the best material for finishing work in poorly heated houses and rooms where increased sound insulation is needed. When installing gypsum boards on a wall, you can use a frame or frameless method.
In the first case, a frame made of metal or wooden corners, on which you can attach the insulation if necessary. Metal construction is more reliable. After installation, the sheets must be puttyed and finishing wallpaper or other materials.
When sheathing walls without frames with gypsum plasterboard or GLV, special glue is used as fastening. This method is suitable for surfaces with a deviation of no more than 2 centimeters.
This is important! GKL and GVL sheet panels must be kept in the room for at least 3 days before installation.
The installation of partitions from gypsum board or gypsum fiber board should begin with marking. Then the main frame is installed from metal profiles onto which gypsum panels are attached. In the case of a shaped structure, only drywall should be used. It is more ductile and can be easily bent.
To help you make a decision on changing the interior, you can watch a video of interesting wall designs with gypsum fiber boards and gypsum boards.
Ceiling made of gypsum fiber board and gypsum plasterboard
Installation of a suspended ceiling made of gypsum plasterboard or GLV is a rather labor-intensive process. But with its help, interesting design solutions are brought to life. Even in simple geometry, with the help of complex lighting you can give the room modern direction. All wiring is hidden behind the frame.
GVL ceilings are made only in straight lines. You can cover the whole thing with sheets ceiling surface. Or you can only make the perimeter of the ceiling using gypsum fiber by installing hidden LED lighting in the niches.
The technology for installing gypsum boards on the ceiling is carried out using a frame method on metal guides. With the help of drywall you can arrange complex multi-level structures.
After installation, the suspended ceiling must be puttied and painted with finishing paint.
Article
The market for construction and finishing materials has been developing at a particularly rapid pace in recent years.
Today to attention potential buyers presented so wide range, understanding this ocean of proposals is not easy even for professional builders.
In this article I would like to take a closer look at what is the difference between plasterboard and gypsum fiber sheet - two universal materials intended for interior decoration, and what is better for finishing premises - gypsum fiber board or gypsum board?
To answer this question, we will conduct a comparative analysis of these two materials made on the basis of gypsum.
Drywall
A plasterboard sheet truly takes special place among all materials used in finishing works.
Finishing today is the most popular solution for both residential and public or industrial premises.
This became possible thanks to the extraordinary wide range positive qualities that this material has.
Types of plasterboards and their scope of application
The basis standard sheet GCR consists of a plate of pressed gypsum, onto which cardboard sheets are glued on both sides. According to production standards, 94% of the volume of a plasterboard sheet is gypsum itself, another 5% is cardboard and 1% remains for the adhesive component. But in addition to ordinary drywall, there are a number of specialized varieties designed for use in extreme conditions. Each of them is painted and marked with a special color for convenience.
Already at the design stage, you should decide what type of gypsum board you will need for finishing work. By purchasing GK sheets, special attention Pay attention to their color and markings.
Ordinary drywall (GKL)
Sheet color is gray, marking color is blue. Designed for interior decoration of any premises in which air humidity does not exceed 70%.
The most common type of gypsum board due to its ease of processing and low cost. Has the widest range of uses, including both residential and non-residential premises. It is not difficult to make on the wall.
Fire-resistant drywall (GKLO)
The leaf is painted in gray, marked with red paint. This material is specially designed for finishing work in places where there is a high risk of fire.
At the same time, gypsum board sheets must prevent the spread of fire and protect against it load-bearing structures.
Increased resistance to fire is achieved by introducing into its composition special reinforcing elements made of fiberglass and other non-flammable substances.
It is used for finishing industrial workshops, electrical switchboards, as well as rooms with difficult access - attics, basements, ventilation shafts, etc.
Moisture-resistant drywall (GKLV)
The GKLV sheet has green, and the markings are applied to it in blue.
In its production, cardboard impregnated with moisture-repellent compounds is used.
It is used in finishing rooms with high humidity - kitchens, bathrooms and toilets, where it can act as a protection against dampness of walls and ceilings.
To improve its waterproofing properties, it is recommended to additionally cover the gypsum board with additional water-repellent coatings: hydrophobic primers and paints, tiles, PVC sheets.
Moisture-fire-resistant plasterboard (GKLVO)
In a private house, fire-resistant sheets can be used to decorate rooms containing large cable assemblies, electrical panels This material combines the main advantages of GKLV and GKLO. In this case, the fire-resistant base of the sheet is pasted over the outside with moisture-resistant cardboard. The main area of application of such sheets is various production premises industrial enterprises. In the residential sector, GKLVO can be used for cladding basements, elevator units, and panel rooms.
Usually varies from 6 to 12 mm, but “exclusive” sheets up to 50 mm thick can also be found on sale.
The thinnest type of sheets with the most fragile structure is used to create ceiling structures. 12 mm sheets, being more durable, are used for the construction of interior partitions. The thickest 50 mm sheets are most often used as flooring.
Among the few disadvantages of HA sheets, perhaps only its insufficient strength can be noted, so it is not worth using it to create load-bearing surfaces.
Gypsum fiber
Cellulose fiber gives plasterboard sheets strength This material appeared on our market much later than plasterboard sheets, but was already able to compete with its popular brother. The design of the gypsum fiber sheet, as in the design of gypsum boards, is based on the gypsum component.
However, the production technology of gypsum fiber boards differs from the production technology of gypsum boards. Gypsum in in this case Before pressing, it is mixed with cellulose fiber, which plays the role of a reinforcing frame.
The surface of the gypsum fiber is not covered with cardboard, but is sanded and impregnated with water-repellent primers, which also prevent the formation of gypsum dust. The result is a multifunctional material that is not afraid of dampness and fire.
Pros of GVL
First of all, this material is good for its strength, which far exceeds the strength of drywall of similar thickness. The undeniable advantages also include the already mentioned moisture resistance and fire resistance. About the features of GVL, watch this video:
For rooms with especially high humidity, for example, for bathrooms - a special type of gypsum fiber with increased water-repellent properties is produced. In terms of its functionality, gypsum plasterboard is in no way inferior to plasterboard: it is used for the construction of partitions and wall cladding, for the creation of suspended ceiling structures and decorative interior structures.
Comparative analysis
As you can see, both materials have approximately similar characteristics and the same set of positive qualities, so there is no big difference or gypsum plasterboard on walls and ceilings.
The difference only appears when any special requirements begin to be placed on the finishing material.
The table shows comparative technical characteristics of gypsum fiber board and plasterboard with other finishing materials.
Fire resistance and moisture resistance
If we consider the standard varieties of these two materials, then the advantage, of course, will remain with gypsum fiber, since even in basic version it is much more resistant to fire and dampness than regular HA sheet. 
However, drywall has special varieties that are in no way inferior to gypsum board in these indicators. Thus, both GVL and special types GKL.
Strength
Internal reinforcement allows even load-bearing structures to be made from gypsum fiber boards In this parameter, GVL is significantly superior to any type of drywall. The internal reinforcing frame makes the gypsum fiber many times more durable than the GK sheet.
Thanks to this, even load-bearing structures can be made from GVL, although with limited permissible load, which is categorically unacceptable for drywall.
In some cases, gypsum fiber is even used as a leveling floor covering: it is laid over wooden or concrete subfloors, and a decorative finishing coating is laid on top - laminate, parquet, etc.
Environmental friendliness
Here, both materials are at their best, especially compared to their plastic “competitors,” but if we analyze this issue carefully, then a slight advantage will again remain with gypsum fiber. For more information about the types of drywall, watch this video:
The fact is that GVL absolutely does not contain formaldehydes, which, albeit in small quantities, are present in drywall (adhesives).
Manufacturability
Both materials are intended for finishing interior spaces, but in terms of manufacturability, the high strength of GVL is to its detriment. While any curved structure can be made from water-wetted GK sheets, such a design will not work with GVL.
Due to its rigidity, gypsum fiber is practically incapable of bending: an attempt to bend it even under small angle can lead to the fact that the sheet simply breaks, therefore, for creating some artistic structures of interior design, the GK sheet is definitely better than GVL.
GVL is not a complete means for heat and sound insulation These indicators vary slightly in favor of gypsum fiber - gypsum fiber has some advantage in heat and sound insulation properties. GVL, thanks to the cellulose contained in its composition, has the ability to accumulate and retain heat.
However, these indicators for GVL are not so high that it can be used as insulation or sound absorber. In this regard, if you want to create walls that are truly impervious to cold and noise, in combination with these materials you should use a mini-slab or a similar material.
Price
If we consider the price aspect, then plasterboard is more affordable than gypsum board. In the basic version, gypsum fiber is approximately 50% more expensive than plasterboard. However, specialized versions of GK sheets (GKLV, GKLO, GKLVO) are very close in cost to GVL, and sometimes even exceed it - it depends on the manufacturer and point of sale. For more information about the differences between these types of materials, watch this useful video:
As we see, there is no decisive advantage in favor of one material or another. Both gypsum fiber and drywall have approximately the same set of positive qualities.
The only result that can be deduced from the comparative characteristics of these two materials: GVL is best used in those rooms where there is a high probability mechanical impact on the wall, and gypsum board is more suitable for “subtle” applications - creating decorative interior compositions.
Gypsum plasterboard sheets (GKL, KNAUF sheets) are a gypsum core, all planes of which, except for the end edges, are lined with cardboard. To form the core, G-4 gypsum is used, which has exceptional physical and technical properties as a building material. To achieve the required density and strength, special components are added to it. Another critical component of drywall is the linerboard. Adhesion to the gypsum core is ensured through the use of adhesive additives. Cardboard plays the role of a reinforcing frame and is an excellent basis for applying any finishing material(plaster, wallpaper, paint, ceramic tiles, etc.). Due to its physical and hygienic properties, cardboard is ideal for residential premises. KNAUF sheets are used for internal lining walls, installation of interior partitions, suspended ceilings.
GKL are divided into:
- ordinary (gypsum plasterboard)
- moisture resistant (GKLV)
- with increased resistance to impact open flame(GKLO)
- moisture resistant with increased resistance to open flame (GKLVO)
Feature of drywall
It is known that gypsum board, along with the existing listed characteristics, has another remarkable ability - acquiring plasticity when wet and restoring its original quality after drying, while maintaining its given shape. This significantly expands the design and architectural capabilities of gypsum board as a building material, through the ability to form almost any curved surface, be it a ceiling or a wall. In the manufacture of curved forms, plasterboard sheets with a width of 600 mm are used. It should be taken into account that the minimum bending radius of a sheet with a thickness of 12.5 mm will be approximately 1000 mm, and as the thickness of the gypsum board decreases, the radius also decreases. So, for sheets with a thickness of 9 mm, the minimum bending radius is approximately 500 mm.
GVL (gypsum fiber sheet)
Gypsum fiber sheets (GVL, KNAUF supersheets) are used for interior finishing, especially those where there are increased fire safety requirements. They are made from gypsum no lower than G-4, with dissolved cellulose waste paper as a filler. Gypsum fiber sheets are a homogeneous environmentally friendly building material used for the installation of interior partitions, suspended ceilings and internal wall cladding in residential premises, industrial buildings, social facilities and medical institutions, schools, kindergartens and sanatoriums. Produced by semi-dry pressing. GVL is used for the installation of partitions and wall claddings with increased requirements for protection from impact, for the installation of prefabricated foundations (dry screeds) for floor coverings, or in the presence of increased requirements for the fire-technical characteristics of the structures used.
GVL are divided into:
- regular (GVL)
- moisture-resistant (GVLV) (GVLV, unlike GVL, is treated with a special water-repellent liquid, which increases the resistance of its surface to high humidity)
- moisture-resistant small-format (DIY)
- KNAUF-superfloor (GVLV EP)
Differences between GVL and GKL. Which is better to choose?
So, having examined gypsum plasterboard and gypsum board, let’s dwell separately on the differences. What should you choose? GVL is used for the construction of partitions and wall claddings with increased requirements for impact protection, that is, it is harder than gypsum plasterboard. GVL is easier to handle when sawing in any direction, as it is homogeneous in composition. GCR is less durable and is cut across so as not to disturb the cardboard reinforcement (although in some cases it is allowed), but it is capable of acquiring plasticity when soaked, and when drying, restores its original strength. Drywall is the best base for wallpaper. They can be glued without any pre-treatment; the only thing you need to do is cover the nail heads with nitro enamel or alcohol varnish to prevent corrosion. Or you can not paste over the walls, but, for example, whitewash or paint them with glue or oil paint, like ordinary plastered surfaces. It is not recommended to use lime paints, as they do not adhere well to cardboard. It is impossible to answer unequivocally that it is impossible to better GVL or gypsum board. There is no universal answer. It all depends on the task at hand and the operating conditions of the premises.
Main profile brands for gypsum plasterboard or gypsum board
Metal profiles are used in all categories of buildings: residential, public, industrial and agricultural. They are used to form frames of various designs and purposes, including for partitions, cladding and suspended ceilings. The frames, in turn, are a rigid base for attaching drywall and gypsum boards.
The main profile brands for fastening gypsum plasterboard or gypsum board:
How to cut drywall sheets correctly
When installing drywall, use solid sheets whenever possible. Cut the sheet of drywall to length so that the end of the sheet meets the support beams, joists, studs or jambs. To properly cut the sheet to length, first install it so that the end extends beyond the edge where you plan to lay the drywall. Measure the required length using a tape measure. Then use a special tool for drywall - a stripper and mark the beginning and end of the cut on the sheet of drywall with a knife. Swipe special knife cut along the length of the drywall sheet. To get the most straight line possible during the first cut, you can also apply a makeshift ruler to the drywall. For these purposes, you can use a wide metal profile, level, etc. Tap one side of the sheet. The drywall should break exactly where the cut you made. If the end edge resulting from cutting is not smooth enough, it should be corrected with a special grater. The paper should not be allowed to peel off from the plaster because... this may have a negative impact on quality. If a paper “fringe” has formed at the end, it should be cut off with a knife. You can also use a plasterboard disc cutter for cutting. This will prevent the paper covering the bottom of the drywall core from tearing. Therefore, in order to completely separate the sheet pieces, run the blade of a knife along the cut area to separate the back covering as well. A different technology for installing drywall is used when you need to cut a sheet of drywall in places where there are internal corners. To make such cuts, use a special tool - a drywall knife. Make a cut where you want to cut the sheet and sharply bend one edge back, as described above. After this, you will again have to cut the paper covering the back of the drywall core. Another way to make the cut is to internal corner- first secure a sheet of drywall in the place where you are making the ceiling, and then use a knife - a drywall tool - to make the desired hole.
Cutting out shaped parts from plasterboard
To obtain a part with uneven edges (arc, wave, zigzag, etc.), you can use a special file when working with drywall, but when using it, the sheet may crumble and the edge of the part will turn out uneven. If you try to align the edge, the dimensions of the part may change. In such cases, it is much easier and more convenient to use a jigsaw to work with drywall.
Drilling drywall
Often for mounting recessed lighting fixtures, etc. Drywall holes required. Small holes are drilled with ordinary drills, and larger ones (for halogen lamps, various pipes, etc.) with special saws for working on drywall or drilled with crowns.
Bending drywall
To create arches, figured ceilings and some other structures, it is necessary to obtain curved parts. There are several ways to work with drywall to bend a piece.
First way. Wet the part and, when it becomes flexible, give it the desired shape. After drying, the part can be mounted. This method of working with drywall, of course, makes it possible to obtain a curved part, but it will require a significant investment of time, which will not please customers very much.
Second way. Use a special spiked roller (needle roller). It is used to pierce paper with outside the intended bending of the drywall, and then the part is bent by applying physical force. As a result, the paper is torn due to punctures and makes it possible to bend the part. The method is quite effective, but it will require special skills, and the part can be difficult to screw on, and before puttying it will look completely unaesthetic.
Third way working with drywall to bend a part consists of cutting the outer side of the intended bend at intervals of approximately 5 cm. Depending on the steepness of the bend, the interval may vary. Then the part is broken at the places of the cuts and bent to the required extent. A part prepared in this way is easy to assemble and requires a minimum amount of time to manufacture.
Drywall installation
First of all, it should be noted that there are many systems and methods for installing drywall in the world. Let's look at the most popular of them:
First way. Installation is carried out using so-called adhesive compounds. This, one might say, is the simplest installation method: on a previously prepared (cleaned of old wallpaper, plaster, etc. and properly primed) wall surface (installation of plasterboard ceilings in this way is not carried out for natural reasons) adhesive composition, prepared in accordance with the manufacturer's instructions. The glue should be applied in “patches” at a distance of no more than 35 cm from each other, with the exception of the corners of the room and the joints of sheets, where the glue is applied in a continuous layer. Also, when applying glue, you should take into account the individual slope, curvature, and deformation of the wall, i.e. In convex areas, less glue should be applied, and vice versa. In places where the depressions are too large, you should first glue a strip of drywall, as if leveling the surface. You can check these characteristics using a level and a thread stretched along the wall. After applying the adhesive, a pre-cut sheet of drywall is pressed against the wall. Next, using a level and skillful hands the sheet is aligned in the plane we need. Sometimes, when installing plasterboard with an adhesive compound, strips of plasterboard (so-called “beacons”) about 15 cm wide are first glued to the wall, and the sheet itself is glued directly onto them. At the same time, do not forget to let the glue dry. The advantages of this method are simplicity, high speed installation and no need for a special set of tools. The disadvantages include the impossibility of creating new partitions and niches: in addition, this method does not allow laying sheets on a wooden base.
Second way. Installation of drywall is carried out on a frame made of wooden blocks. Installation of drywall on a frame made of bars was popular about ten years ago, due to the shortage of metal profiles that existed at that time. This method consists of two stages: assembling a frame from bars and actually installing plasterboard sheets on a wooden frame. The assembly of a frame from bars begins with the alignment and subsequent fixation of the guides. Depending on the material to which the beam is attached, the appropriate fastening is selected, most often it is a dowel nail (if the base is concrete, brick, etc.) or a self-tapping screw with a large pitch (if the base is wooden). To align the guides, as well as the entire frame, a level and strips of veneer are used, which, if necessary, are placed under the bars. After installing the guides, the main bars are set and fixed. They should be installed no more than sixty centimeters from each other, i.e. so that each sheet of drywall is attached at least at the edges and in the center, and the edges of adjacent sheets are attached to one bar. Before installing pre-cut plasterboard sheets, you should make sure that the assembled frame forms one plane, and, if there are any shortcomings, eliminate them. Drywall is attached to wooden frame using wood screws. In this case, the distance between the screws should not exceed thirty centimeters, and the screws themselves should be screwed into the drywall so that their heads are slightly recessed, but without tearing the paper. Compared to the previous method of installing drywall, this method has a number of significant advantages. These, first of all, include the possibility of creating new structures, such as arches, partitions, niches, etc.; in addition, we get the opportunity to change forms existing walls and partitions. However, this is a more labor-intensive method that requires a special tool. We should also not forget that with changes in temperature and humidity, wood tends to deform, which cannot but affect the quality of the entire structure.
Third way. Installation of drywall using a metal frame. A metal profile is used to create the frame. The assembly of the metal frame, as in the previous case, begins with the alignment and subsequent fixation of the guides. A level is used to set the guides, as well as the entire frame. The difference is that the main profile is fastened using special fittings called “suspension” and metal screws. The use of hangers allows you to simultaneously attach the metal profile to the wall and align it in the desired plane, which greatly simplifies the process of installing drywall. Suspensions should be located at a distance of no more than seventy centimeters from each other, and the main profile should be installed no more than sixty centimeters from each other, i.e. so that each sheet of drywall is attached at least at the edges and in the center, and the edges of adjacent sheets are attached to the same profile. Drywall is attached to the metal frame using metal screws. In this case, the distance between the screws should not exceed thirty centimeters. Installation of drywall on a metal frame is the most in a relevant way today, because it, while retaining almost all the advantages of other methods, is not burdened with their disadvantages. In addition to all the advantages when using a metal frame, it is also possible to hide electrical wiring, heating radiators, pipes, etc. under plasterboard, and install built-in lighting fixtures– halogen lamps, etc. The disadvantages of this method include the need for special tool and qualified specialists.
Security measures
Gypsum dust can cause eye and respiratory irritation. Therefore, you should take care in advance to protect your eyes and lungs. To do this, you must use safety glasses and a mask or respirator, and also ensure proper ventilation repair locations. Carefully study the purpose of each tool and use these tools only for those applications for which they are specifically intended. Unsharpened tools are dangerous and can become a hindrance, or even cause harm to your work. Always use sharp blades. Keep track of your drywall tools and keep them in safe places. Always turn off the electricity in the room if you work in a potentially fire hazardous area. Be careful when working on trestles, scaffolding and ladders. We must not forget that when installing a construction ladder, all its legs must be firmly on the ground. Never try to reach to the side or upward when working on a ladder. Keep children away from construction site and keep them away from power tools and construction materials, solvents, etc., which may be hazardous to their health. Keep the work area clean and do not allow debris and waste to accumulate on the construction site.