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Installation of floors with gypsum fiber sheets. Installation of gypsum fiber board floors, technology features. Installation of gypsum fiber sheet covering

Before laying most finishing coatings, such as laminate, linoleum or carpet, the floor surface must first be leveled. Great solution in such cases there will be application gypsum fiber sheets. This finishing material is made of gypsum; the reinforcing element in these sheets is loose cellulose fibers and various technological additives. GVL sheets are distinguished by the absence of a shell, homogeneity of structure and higher density and strength than plasterboard.

The most important advantages of this material are environmental friendliness and non-flammability.

The use of gypsum fiber sheets significantly increases the soundproofing characteristics of the floor. Another advantage of this finishing material is its ability to retain heat, so gypsum fiber board for the floor combines the functions of a subfloor and insulation. Using GVL sheets, you screed dry and in a clean way and you can immediately begin laying the finishing coating.

There is a moisture-resistant variety of this material - GVLV, and ordinary GVL sheets. They are used in different rooms.

Moisture-resistant GVL sheets are used in rooms with high humidity, and ordinary ones are laid on the floor in residential and industrial premises, where there is no risk of leaks in water supply systems and high air humidity.

Installation features

Before starting to assemble a dry screed from gypsum fiber board sheets, a layer of waterproofing material is laid on a wooden or reinforced concrete base. Expanded clay is most often used for this purpose, as it levels and insulates the floor well. However, the very first layer that you place directly on the surface of the floors should be polyethylene with a thickness of 200 microns. On some floors you can lay glassine or roofing felt. This very first layer will take on the function of vapor barrier.

Video - Which backfill to choose for dry floor screed

Polystyrene foam boards can be placed as additional layers between expanded clay and gypsum plasterboard sheets. This technique guarantees increased heat and sound insulation and can be used, for example, in children's rooms. This way you can get rid of your neighbors’ dissatisfaction with your child’s noisy games. Also, under gypsum fiber sheets you can lay any engineering Communication. Between the gypsum plasterboard sheets and the finishing coating you can install a water or electric heated floor. This feature may be useful to you when arranging a bedroom, nursery, kitchen, bathroom and hallway, in a word - in any room where additional heating of the floor and air in the room may be needed.

Installation of a base floor made of medium-sized gypsum fiber boards, approximately 1.5 m x 1 m, with a thickness of 1 cm to 1.2 cm, is quite quick and simple, as it is based on the principle of “dry operations”. The fastest installation of the floor is carried out using double sheets glued at the factory with folded ends. If for some reason you cannot purchase double gypsum fiber boards, then simply lay the sheets in two layers. The second method, of course, is less convenient, but it allows you to get out of the situation and get a perfectly flat base floor.

The standard length of a gypsum plasterboard sheet is 2.5 m, and the width is 1.2 m. The most common thickness is approximately 10 mm. In order to avoid chalking, each sheet is impregnated with a water repellent and a specialized composition that prevents this phenomenon and acts as a primer. Each slab has one side carefully polished.

Other important characteristics of moisture-resistant and conventional gypsum fiber sheets

What consequences can result from errors when installing gypsum fiber boards?

It is important to strictly follow the installation rules. If you do not cut off the folded edge of the sheets that will be located near the walls, then there is a high probability of the floor sagging in this place. Metal beacons left in a layer of dry screed can lead to deformation of the floor when the expanded clay shrinks. Be sure to use only dry expanded clay or dry it thoroughly, otherwise the floor is guaranteed to be deformed and you will have to invest your time and money in repairs again.

Video - Knauf dry floor screed with additional heat and sound insulation

Advantages and disadvantages of GVL slabs

The advantages of gypsum fiber boards over other materials include the following parameters:

• resistance to moisture - in this parameter, gypsum fiber board is superior to plasterboard and fiberboard;
• massiveness;
• high density;
• flexibility;
• environmental friendliness;
• thermal insulation;
• soundproofing;
• resistance to combustion (confirmed by the appropriate certificate);
• GVL does not deform under the influence of temperature;
• simple installation;
• minimum amount of waste.

The disadvantages of GVL slabs are as follows:

• the slabs are quite heavy;
• it is important to follow the installation and storage rules; violations may increase fragility;
• boards are more expensive than drywall.

As you can see, this material has many more advantages than disadvantages.

Step-by-step instructions for installing gypsum fiber board floors

Step 1

Before the beginning GVL installation floor, you should dismantle the old floor covering, boards, fiberboard sheets and logs on which the old floor lay. We remove absolutely all old materials; in the end, bare floors should remain. Be sure to thoroughly sweep the surface, remove all construction debris and, if possible, dust.

Step 2

Floors that have been cleared of old materials and debris may have cracks and holes. They should be eliminated by pouring a quick-hardening cement solution inside with a marking of at least 150 or covering mounting mixture. Alabaster is also suitable for this purpose.

Step 3

Marks need to be made top level backfill. For this stage of work you will need a laser or water level. The height of the marks can vary from 2 to 6 cm. This range depends on the unevenness of the floors. As a result, the base floor will be located 2 cm higher, since the thickness of the double sheet of gypsum fiber board will increase.

Step 4

The floors are completely ready for waterproofing. The entire surface should be covered with plastic film, if the floors are concrete, and on wooden surface It is permissible to lay glassine and bituminized paper. Sheets of waterproofing material should overlap, overlapping each other by 20-25 cm. The edges must be glued with mounting tape.

The film should extend onto the walls and its edge should be located at least 2 cm above the level marks. Attach the waterproofing to the walls with mounting tape.

Step 5

If communications will be located on the floor of the gypsum fiber line, then all wires must be carefully hidden in a protective corrugation and fixed to the floor. It is important to consider that between the corrugation with wires and the gypsum fiber boards there should be a layer of expanded clay no thinner than 2 cm. If necessary, adjust the height of the marks.

Step 6

To eliminate the appearance of so-called sound bridges, there are two options. You can glue the perimeter of the room with foam rubber edge tape 10 cm wide and 1 cm thick. To increase the speed of work, we recommend purchasing self-adhesive tape, if it is missing, secure a simple foam tape with mounting tape.

You can also use edge tape made of mineral wool or polyethylene foam. These materials perfectly perform the function of protecting the finished floor from deformations that can be caused by thermal expansion.

After laying the soundproofing tape is completed, it is necessary to cut off the excess, focusing on the top floor, including the level of backfill and the thickness of the gypsum fiber board slab.

Step 7

We begin filling the expanded clay. Carefully sprinkle expanded clay with a fraction of no more than 0.5 cm onto the vapor barrier layer. Be sure to wear a respirator, since when expanded clay is poured out of the bags into the air, a large amount of dust will inevitably rise.

Step 8

The next step is to level the expanded clay using guide beacons made of metal profile. Be sure to use a level when performing this operation. If you use a water level, then when calculating the distance between the profile, be guided by the length of the level. The ends of the tool should lie on adjacent guides, which will subsequently serve as a guide and support for the rule. Some craftsmen find it convenient to use a water level instead of a rule. This technique gives additional control over the thickness of the expanded clay layer. Level the backfill layer meter by meter.

Pay special attention to compacting material near walls, in doorways and in the corners of rooms. Perform this work only in a respirator to prevent dust from entering the respiratory tract.

After completing this stage of work, be sure to remove the guides and fill the resulting voids with expanded clay. In order not to deform the leveled and compacted expanded clay, use GVL sheets as special “islands”. However, any similar materials are suitable for this purpose. For example, waste fiberboard or plywood. The size of the islands should be no less than 50x50 cm.

Step 9

Additionally, the floor can be insulated and soundproofed; for this purpose, sheets of plasterboard and penoplex are laid under the gypsum plasterboard

Joints are glued during installation

You should start installing gypsum fiber boards from the corner located farthest from the door. This will eliminate the possibility of damage to the leveled dry expanded clay screed. The edge of the sheet located against the wall should rest against the edge tape. The seam edges of adjacent slabs must be coated with PVA glue to obtain a strong “lock”. Then, every 10-15 cm, it is necessary to screw in self-tapping screws at least 2 cm long. Thus, the perimeter of each sheet will be strengthened in two ways.

When laying the second row of gypsum fiber boards, move the joints so as to obtain the effect of brickwork. Use a jigsaw to adjust the slabs to size.

In cases where the floor base in the room is very uneven and the thickness of the expanded clay layer is from 6 to 10 cm, it is necessary to lay a second layer on top of the first layer of gypsum plasterboard sheets. When laying the second layer, work should begin from the corner opposite the entrance to the room. Carefully ensure that the seams between the slabs of the first and second layers do not coincide and do not overlap each other.

Step 10

When laying the gypsum fiber board floor is completed, you need to putty the seams between the sheets and the places where the screws are screwed in. Additionally, you can use reinforcing tape. When laying gypsum fiber board floors in the bathroom and kitchen, it is worth using special products for waterproofing joints with walls and seams between sheets.

Styling finishing coating You can start laying the floor a day after finishing work with gypsum fiber boards, during which time the glue and putty will have time to dry. On top you can put tiles, laminate, linoleum or any other covering. If necessary, use a specialized underlay.

Video - GVL for floors

Uneven floors are a problem in many apartments. Therefore, before laying the facing coating, it is worth taking care of the preparatory measures. Many people use substrates for leveling. GVL sheets can act in this capacity. We will look into how gypsum fiber board is laid on a wooden floor and a concrete base in the article.

GVL sheets can be compared with plasterboard. They are also sold in sheets and are made from building gypsum. However, gypsum fiber sheets are much denser than gypsum plasterboard, due to which they have more best characteristics. GVL sheets consist of 80% gypsum and 20% cellulose fibers.

GVL sheets are impregnated at the manufacturing stage with special compounds, so there is no need for priming in the future.

They cost more than gypsum boards, but still they will not cost as much as other leveling methods. There is no need to worry about safety, the material is environmentally friendly and will not cause harm. environment and to man. GVL slabs can be used not only as a substrate for the floor, but with their help they create partitions and sheathe walls and ceilings.
One of the properties of the material is humidity regulation. They are quite capable of absorbing moisture if its level is too high. They are also able to release it if the room is too dry.

Working with the material is easy and simple. There is no need for extreme accuracy during the work process. The slabs are not subject to crumbling and cracking. Installation work can be done independently without the involvement of specialists. The slabs can only be used for installation in private homes: due to their low weight, they do not bear any load on the base.
Sheets are used very often as a substrate. They act as an additional layer of thermal insulation, replacing insulation. The material does not support combustion, so it is used as additional protection against the spread of fire.

GVL can be laid either on a concrete or wooden base. They are also suitable for installation in unheated room: They are not afraid of frosts and temperature changes. Any facing coating can be laid on the substrate.
There is practically no debris when laying the material, so the process will not take much effort and time to clean up. Apart from the sheets themselves, this alignment method does not require additional materials such as gravel or sand.

When using GVL, you do not need to waste time drying; after installing them, you can immediately begin cladding.

According to their properties, GVL sheets are divided into two large groups:

• Standard;
• Water resistant.

Standard slabs are characterized by high strength indicators. They do not support combustion, they are used for finishing in both residential and commercial premises. However, they are only suitable for rooms with high level humidity.
Waterproof sheets are additionally treated by special means to protect against moisture. They can be used for installation in rooms with high levels of humidity: in the kitchen or bathroom. They can also be used in unheated rooms: a country house, garage and basement.

Advantages and disadvantages

The material is in demand due to the mass of its advantages:

1. Environmental friendliness;
2. Easy installation;
3. Density;
4. Fire resistance.

Working with sheets is very easy. During the work you will not need special skills or specific tools. Therefore, installation will not take much time, and in this way you can save a little without calling specialists. When working with sheets, there will be little debris; there is no need for thorough cleaning after installation.
GVL slabs are used as a substrate, insulation or subfloor. Almost all types of facing coatings can be laid on such a base without additional costs, because the sheets provide a perfectly flat surface.

The sheets differ in density, but unlike gypsum board sheets, they cannot be bent. Therefore they are not used for finishing. The leaves are not afraid of water. Even standard slabs can withstand the effects of moderate indoor humidity. The sheets are absolutely safe. They do not contain toxic substances, so they can be placed even in a nursery.
The soundproofing characteristics of the material remain high; it can be used not only as a substrate, but also to create interior partitions. After installation, there is no need to wait for the material to dry; you can immediately begin cladding. When burning, the material does not support it, protruding protective layer. In addition, the material not only does not release heat, but is also able to retain it.

The sheets always remain warm, so for unheated rooms they are ideal option. They can also be installed under a “warm floor” system.

The disadvantages of the material are revealed in comparison with gypsum board sheets. First of all, this is the price. The cost is not that high, but when compared with gypsum board sheets, the price will be about twice as high, so not everyone can afford them. Despite the light weight of the material, it is still much larger than gypsum board sheets.

Areas of application

GVL sheets are used very often due to the large number of their advantages. Most often, moisture-resistant gypsum fiber sheets are used for flooring: their price is not much more expensive than standard ones, but their characteristics are much better. GVL is especially in demand for installing interior partitions due to its soundproofing characteristics.
It is also widely used for laying on the floor. GVL sheets are not suitable for these purposes, as they are too fragile. But durable GVL sheets can be installed on the floor.

Earlier wet screed gender was practically the only option. And now they are increasingly using the dry method, which includes gypsum fiber sheets. They can be installed at any time temperature conditions and there is no need to wait for the coating to harden.
GVL foxes are used in residential premises, on industrial facilities or in public institutions. It is widely used for finishing rooms with high levels of humidity or in facilities where there are high fire safety requirements.

Step-by-step installation instructions

Necessary tool

Gypsum fiber board flooring is very easy to install. During the process, you will need a number of tools that you probably already have at home.

You will need:

• Pencil;
• Roulette;
• Screwdriver;
• Construction knife or electric jigsaw;
• Rule, level;
• Metal profile;
• Narrow spatula.

Surface preparation

Before any type of work with the floor surface, it first needs to be prepared. Inspect the base for flaws. If you have a wooden floor, then you need to check all the boards for damage from rot or insects. Check flatness concrete base. Very large depressions are filled with expanded clay. The cracks are sealed with cement mortar.
If you are renovating floors in own home or an unheated room, it would not be superfluous to lay a layer of waterproofing. Ordinary polyethylene film can act in this capacity.
Lay it on the floor with a slight overlap of 15-20 centimeters. They need to be secured together with tape. The film should extend 2 cm onto the wall. Polyethylene is not suitable for wooden floors due to its vapor permeability. In this case, you need to use glassine and any other breathable materials.
If you are making repairs again, then the old cladding must be removed without fail. All debris must be removed from the bare base. It is advisable to rinse it and leave it until completely dry.

Laying gypsum fiber board on the floor

Installation of slabs begins with marking. It is necessary to note the filling level. Ideally suited for these purposes laser level, but if it’s not there, a spirit level will do. If the base is uneven, then the height level will be different around the entire perimeter of the floor. As a result, the level of the sheets will add 2 cm to the floor from the highest point of the base.
If according to your plan the wires should pass under the sheets, then they need to be fixed to the floor surface. To prevent the sheets from deforming over time and as a layer of additional sound insulation, an edge tape is glued around the perimeter of the room. After its installation, you need to cut it taking into account the width of the backfill level and the gypsum fiber sheets themselves.

After this work, expanded clay is poured. You need to use a small one. After backfilling, the expanded clay is leveled using the profile guide beacons. Use a level while working.

You can level the layer using a rule. If there is a need for an additional layer of insulation or sound insulation, then gypsum plasterboard sheets or foam plastic are laid on the expanded clay. After this, proceed directly to the installation of gypsum fiber sheets. Laying is carried out from the wall.
The sheet should be pressed tightly against the edge tape. The edges of the sheets are coated with glue for better adhesion. In addition, self-tapping screws are screwed into the sheets in increments of 15 cm. The sheets are laid as follows: brickwork: the joint of the slabs of the next row should be located in the center of the slab of the previous row.

After installation, the seams between the sheets and the screws are sealed with putty. In rooms with high humidity levels, the joint can be additionally treated with sealant.

Wait until the putty has completely dried and you can lay the facing coating.

Gypsum fiber is finishing material for laying on the floor. In the future, you can easily lay almost any finishing coating on it.

This material is available exclusively in sheet form. It is somewhat similar to drywall. However, its characteristics are somewhat superior. Its main composition is gypsum, which is used in construction. They are strengthened or reinforced with loose cellulose. This increases the strength properties of the flooring elements. It is made from waste paper.

GVL is not as widely used as drywall, mainly due to its price. It is much higher than on drywall.

Scope of application of GVL

Gypsum fiber sheets can be used indoors for various purposes: apartments and houses, public, administrative and industrial buildings.

The following surfaces can be finished with similar material:

• rooms where the humidity level is constantly changing and often reaches high performance. These are bathrooms, baths, saunas, kitchens and utility rooms. For this purpose, moisture-resistant GVL is used. It is recommended to additionally treat it with strengthening compounds, and tiles or tiles can be used as the finishing layer;
• They line attics, basements and attics with it. However, in such rooms with gypsum fiber board finishing, ventilation will be required;
• GVL sheathes garages and outbuildings. Since this material can withstand large temperature changes and retains heat;
• it is excellent for finishing children's sports and play areas. Since GV sheets are able to withstand point loads;
• They are also recommended to line the shafts of all types of elevators due to their fire-resistant properties.

Advantages of GVL flooring

Gypsum fiber sheet has many properties that are not available to other building materials for similar work. Before final choice Floor finishing is worth learning about several advantages:

• its homogeneous structure helps to withstand various loads, including temperature. He will not lose his physical extreme conditions. This became known after numerous laboratory studies;
• The frost resistance available only to GVL is surprising. It can withstand as many as 15 cycles. This means the researchers thawed and froze it 15 times. And the cracks appeared only in last time. While this property of drywall sheets is calculated in only 4 cycles. As a result, it has been established that this material is suitable for installation in poorly heated rooms, or where heat is supplied only occasionally;
• In addition, its noise insulation properties are also excellent. Sound insulation with it reaches about 40 decibels;
• it is also customary to produce gypsum fiber boards that are sufficiently moisture resistant;
• it burns very poorly.

In addition to its advantageous characteristics, GVL are increasingly being purchased for self-installation on the floor no problem. After all, it perfectly levels the floor. All work will take the shortest possible time, which is important when quick repair. Today it is not so difficult to find ways on the Internet to easily lay sheets on the floor.

Installation of GVL is a dry and clean method of floor screed. Therefore, immediately after finishing the work, you can begin laying the coating.

When purchasing building materials, you need to know exactly for what purposes they will be used. Since there are several types with different basic characteristics:

• simple;
• moisture resistant;
• fire resistant;
• moisture- and fire-resistant.

Method of laying and fastening gypsum fiber boards to the floor

This method of laying the floor allows you to avoid a huge amount of construction waste. There is no need to additionally buy and use concrete, sand or gravel. Dry screed saves repair time; there is no need to wait for the solutions to dry. You don't have to be a professional to know how to make gypsum fiber board floors.

Many modern building materials For the final floor covering, an absolutely even preparatory coating is required. And not all of them have good insulation heat and sound. And GVL will be the best option.

When layers of other building materials are used under gypsum plasterboard for additional thermal insulation, you need to understand how much this will raise the floor and change the height of the room.

Another advantage is that “warm floors” can be laid on top of the gypsum fiber. And for such work, sheets of small thickness, only 1 cm, are suitable. This will be enough, the heat will remain in the room for a long time.

This is not such a complicated process, and it takes a little personal time, so it is not even necessary to call professionals. However, it is important to strictly follow the uniform installation procedure and know how to properly secure gypsum fiber boards to a concrete floor. Otherwise, it will lose its performance properties.

GVL installation procedure:

1. First you need plastic film. With its help, the floor is vapor-insulated and all unwanted joints are hidden. It should extend onto the walls and can be easily trimmed at the end;
2. Next comes the polymer tape. It fully compensates for expansions that may occur due to temperature or humidity conditions. This will save GVL;
3. then expanded clay is poured onto the floor. It will become the basis. Inexpensive material, which easily retains heat and has sound insulation properties. It is durable and absolutely safe; it will not put a load on the main floor due to its low weight. It is recommended to use granules no larger than 50 mm;
4. then some skill will be required. After all, expanded clay must be leveled with a water level. Labor-intensive work that can take a lot of time;
5. now you will need beacons, which are easy to find in any hardware store. Their presence is mandatory. The first sign is placed at the window; it will determine the height of the entire floor in the room. These beacons will help determine where expanded clay needs to be added or removed. Each subsequent one is equal to the previous one;
6. next point direct installation gypsum sheets on expanded clay. Don't forget about offset;
7. To securely attach them to each other, it is necessary to make the same offset, then one sheet is sawn. For better strength, the fastening edges are coated with glue and fastened with self-tapping screws. On these consumables It is not recommended to save.

Don't forget about some nuances. For example, if high thermal insulation is required and additional layers will be laid under GVL. Then the floors must be prepared before repair work. For waterproofing, you can use PET film, roofing felt, glassine.

You can also use homemade ones as guides or beacons. wooden blocks. They will become a good reference point in the room to accurately see the level of expanded clay. They will also help with laying and fastening gypsum fiber sheets.

To simplify the installation of gypsum fiber boards, glued elements with the required offset were invented. This increases the strength of the floor and saves even more time. And its installation is even easier even for non-professionals. However, these Construction Materials are significantly more expensive than their analogues.

Layers recommend carefully monitoring the gaps. It is desirable that they are no more than 2 mm. If the finishing layer is linoleum or carpet, they will need to be puttied. All excess glue is also removed.

Before laying tiles on GVL, it is worth learning a few nuances on how to lay them correctly. To begin with, gypsum fiber primer is required. You need to find a special tile adhesive at a building materials store. It is better to use a dry solution and dilute it in the correct proportions at home. The finished solution is applied to the surface, not to the tile. After each new tile, you need to check the evenness of the surface with a level.

The screed method of laying GVL is modern in the world of repairs. After all, this significantly saves time, retains heat, does not let in extraneous noise, perfectly levels the floor and is an absolutely environmentally friendly material.

The rapidity of progress concerns all areas of life, but it is especially noticeable in construction market. Here, not even a month goes by without innovation. Innovations have significantly changed and simplified the technological processes of all stages of construction, making life easier for both professionals and beginners. Thanks to the use of advanced technologies labor-intensive processes during the construction, reconstruction and repair of buildings, such as brickwork or concrete flooring, are replaced by new, simpler ones. An excellent way to install a high-quality and quick floor covering is to make a dry screed from gypsum fiber board sheets. Work is carried out in comfortable conditions, without dirt and dust, with minimal costs labor.

GVL – getting acquainted with the material

Conventional drywall on large construction sites and during local repair work increasingly replaces sheet material new generation - GVL (gypsum fiber sheet). It consists of polished slabs made of ordinary gypsum, but reinforced with reinforcement. For this purpose, fluff pulp is used - a product of waste paper processing. During the manufacturing process, boards marked GVLV are impregnated with hydrophobic compounds. A feature of gypsum fiber sheets that distinguishes them favorably from plasterboard is the absence of a cardboard shell, uniformity of structure, which gives the material high strength characteristics. The technology, in its principle, is very similar.

Gypsum fiber for floors: pros and cons

Gypsum fiber sheets are used for covering any surfaces in apartments, private houses, public buildings. Using GVL, you can quickly and conveniently finish walls and ceilings. They are much better suited for installing subfloors under flooring than plasterboard or fiberboard. Plasterboard boards with moisture-resistant properties declared by the manufacturer, when water gets on their surface, quickly collapse and warp. In addition, gypsum plasterboard is quite fragile; strong targeted impacts may cause it to split.

Gypsum fiber boards behave completely differently under similar conditions. They differ:

• fire resistance- gypsum does not burn, the maximum damage that fire can cause to it is charring of the surface;
• strength- reinforcement gives brittle gypsum hardness sufficient for the use of gypsum plasterboard as a floor covering;
• moisture resistance- water does not penetrate the pores of GVLV (moisture-resistant) boards due to treatment with water-repellent impregnation;
• low thermal conductivity- this indicator makes GV sheets an ideal material for laying on the floor; they perform the function of insulation;
• resistance to low temperatures- unlike drywall, which can withstand only four cycles of freezing and defrosting, gypsum fiber board can withstand as many as 15 such cycles.

A small fly in the ointment in a huge barrel of honey - the cost of the material is quite high compared to drywall, however, it is justified by its advantages.

Selecting high-quality gypsum fiber sheets for flooring

How to choose the right GVL for a specific room? First of all, pay attention to the price and manufacturer. Famous companies keep the brand and do not knowingly release poor quality product. Low cost signals low quality due to the use of low-quality components or defects in the production process. By trying to save on material, you can lose much more time and money later when defective slabs fail before their stated service life.

When installing floors in rooms with high humidity - kitchens, bathrooms, baths, saunas, choose special moisture-resistant GVLV slabs. For other rooms, ordinary gypsum fiber sheets are sufficient. Between single-layer gypsum fiber boards of standard or small format sizes and sheets consisting of two layers, the latter are often chosen for flooring. They are made of two plates glued together offset and forming a locking system. This material is especially easy to install. It is from this that the so-called “dry” screed is usually made.

Advantages of dry screed

Though concrete covering and is one of the most reliable, but any master, having once laid a floor from GVL sheets, is unlikely to want to tinker with it next time concrete mortar for the construction of a monolith. Moreover, gypsum fiber has high hardness and is perfect for laying subfloors. They do not bend or creak and are suitable for laying any floor covering.

Installing gypsum fiber sheets is a real pleasure, especially for professional builders. Amateurs getting down to business for the first time can also easily cope with this dust-free work.

The material is easy to cut and, thanks to its low weight, is easy to install. Under the floors made using the dry method, utilities are placed and cable mats are laid for the installation of a “warm floor” system.

Dry screed base

The basis for laying GVL sheets is both a concrete coating and a wooden floor. Before starting installation, standard base preparation is required:

• concrete screed– the surface is leveled, cracks are filled with mortar, and if necessary, rough grinding is performed;
• lean concrete - more cheap option grounds;
• wooden floor - repair of failed joists is carried out, the gaps between the floorboards are sealed with special putty.

When installing floors, special attention is paid to the horizontal surface. At all stages of work, from leveling the base to installing the finished floor, control is carried out using building level or level.

Laying gypsum fiber board: 7 simple steps

1. The finished base is covered waterproofing material . For concrete screed, polyethylene film 0.2 mm thick is used. Glassine is laid on wooden floors. The edges of the waterproofing are placed over the walls, the joints are sealed with construction tape.
2. Edge tape is glued along the perimeter of the walls– a strip of polystyrene 10 cm wide, 1 cm thick. This measure helps prevent swelling and cracking of gypsum fiber boards.
3. The entire surface of the base is covered to a thickness of at least 2 cm with amorphous insulation– expanded clay, perlite or coarse river sand. Perform leveling it building rule. So that you can move around on the leveled insulation without fear of damaging the horizontality of the bedding, several “islands” are arranged.
4. From the wall opposite the door, begin the installation of the first layer of gypsum fiber boards. The folds are treated with PVA glue; additionally, the material is fastened with self-tapping screws in increments of 20-30 cm, depending on its size.
5. The entire surface of the mounted sheets is treated with glue, and the next layer is laid on them. The second layer must be laid in the direction opposite to the first, so that the material is spaced apart.
6. Putty seals the joints between the slabs, as well as locations for installing self-tapping screws. Cut off the protruding part of the edge tape and waterproofing material.
7. Laying the finished floor – wooden boards, parquet, tiles, laminate, linoleum, PVC tiles. The coating is ready for use immediately after installation.

Before laying the main flooring, care must be taken to ensure the floor is level. GVL sheets can be used for this purpose. They have many advantages, which include not only a flat floor.

Gypsum fiber sheets are used for cladding frame structures and gender. It has a homogeneous structure, so it is quite durable. Let's consider more detailed description material.

Purpose and characteristics of gypsum fiber boards:

• You can sheathe any frame: floor, wall, ceiling;
• The structure of the slabs absorbs excess moisture and releases it when necessary;
• Does not crumble during installation;
• They have low thermal conductivity;
• High fire resistance;
• Can be installed on wood or concrete floor; At the same time, laminate, parquet, tiles and any other flooring material can be laid on the GVL;
• Resistant to low temperatures.

The characteristics of gypsum fiber boards indicate the versatility of the material. It can be installed in any room and under any floor covering. In this case, the material of the floor itself does not matter.

Advantages and disadvantages of GVL flooring technology

Based on the characteristics of the material, its advantages can be highlighted. Gypsum fiber boards are similar to plasterboard. But they have serious differences.

Pros of gypsum fiber flooring:

• Moisture resistance is much higher than in plasterboard and chipboard;
• Dense structure;
• Compliance;
• Environmental Safety;
• Excellent heat retention;
• Provide sound insulation;
• Fire resistance;
• Resistance to temperature changes;
• Easy installation;
• Minimum waste.

All the advantages of the material indicate the effectiveness of its use. All parameters guarantee the durability of the material. In addition, their installation is quite simple and can be done independently.

Disadvantages of GVL flooring:

• The weight of the structure;
• If installation and storage rules are violated, the slabs may become fragile;
• Expensive.

There are still many more advantages. Despite the high price, GVL slabs are much higher quality and stronger than drywall. If you follow the technology, this floor will last a long time.

Types of gypsum fiber boards for floors by size

For the floor, you can purchase two types of slabs, which differ in size. In addition, each type has its own characteristics and power. The dimensions of the slabs are determined by GOST.

Types of gypsum fiber boards:

1. Standard with dimensions 1200×1500 mm. Such plates are used for all surfaces. They are used to construct partitions and level walls.
2. Small-format ones have two sizes: 1200×600 and 1500×500 mm. In appearance, these are two connections that are placed so that their centers do not coincide with each other. Thanks to this, a rebate is formed - a simple locking system.

For flooring, sheets of the same size are most often used. But in some cases, a combination of designs of different parameters is possible. Then there is an alternation of layers of standard and small-format slabs. The thickness of GVL for floors is on average 10-12.5 cm.

When using structures of different sizes, you need to ensure that the joints do not coincide with each other.

High-quality gypsum fiber has two main types, based on size and design. In addition, there are two types of slabs with different characteristics. They determine the performance properties of the material.

Types of slabs depending on purpose:

1. Standard version of GVL. Has all the strength and environmental safety. Used indoors for various purposes With optimal humidity air.
2. Moisture-resistant type of GVLV. It has increased resistance to moisture because the boards are treated with hydrophobic agents. Suitable for baths, kitchens, baths, saunas, as it can withstand high humidity.

The KNAUF company produces a special type of gypsum fiber - “KNAUF-superfloor”. The design looks like two sheets that are combined with each other. However, they are slightly offset.

Sequence of laying gypsum fiber board on the floor

You can make GVL floors with your own hands without the help of a specialist. First you need to prepare the floor surface. To do this, you will have to dismantle the old covering along the joists on which it was installed. We need to get rid of everything. All debris must be removed and the bare surface thoroughly swept.

After this, you need to seal all the cracks and cracks on the floor. You can cover them up polyurethane foam or use cement graded at least 150. Some prefer to use alabaster.

Gypsum fiber installation technology includes:

1. Preparatory work - removing the old coating, covering cracks and cracks.
2. It is necessary to draw markings at the backfill level. To do this you need to use a laser or water level.
3. Installation of waterproofing. The film is overlapped by 20-25 cm. The edges are fixed with tape.
4. All communications and wires must be hidden in a protective corrugation. A 2 cm layer of expanded clay should be placed between the gypsum fiber and the cables.
5. Installation of sound insulation. A special tape is glued around the entire perimeter of the room.
6. It is necessary to fill in expanded clay. First you need to lay a layer measuring 0.5 cm. To protect the respiratory tract, you need to use a respirator.
7. You need to level the layer using guide beacons. For reliable results you need to use a level.
8. Installation of gypsum fiber boards. You need to start from the corner farthest from the door. The edge of the layer should rest against the soundproofing tape. The folds of adjacent slabs must be coated with PVA glue for fixation. You also need to screw in self-tapping screws around the perimeter of the sheet.
9. The final work is to putty the seams and screw heads.

If the sheets are laid in the kitchen or bathroom, then you need to use a waterproofing agent to seal the seams. This is due to the increased humidity of the rooms. You can also additionally use reinforcing tape.

If the floors are significantly uneven, use another layer of sheets. The second layer of slabs should not coincide with the joints with the first.

Laying the base covering can begin a day after installing the sheets. During this time, the putty will have time to dry. Under floor coverings that require a perfectly flat floor, you need to lay a backing.

Features of installing gypsum fiber boards on wooden and concrete floors

Required condition high-quality installation– you need to trim the sheets after laying the last row. It is necessary to adjust the dimensions of the slabs from the opposite wall, where the installation began. This will result in a seam spacing of 20 cm in each layer. The first installation should have an interval between seams of approximately 1-2 mm.

Dry screeding of small-format slabs involves adhesive for gypsum fiber board on the floor. The sheets are simply glued together using folds on which glue is applied. This assembly method is faster.

Small-format finished slabs also need to be cut when laying the last row.

If the thickness of the leveling substrate reaches 10 cm, then you need to put three layers of gypsum fiber board for the subfloor. Dry screed provides insulation using polystyrene foam boards. For heated floors, a layer of expanded clay or other material can be used.

Types of dry screed:

1. Expanded clay. Make a 2 cm bedding when the base is flat and insulated.
2. Styrofoam. The thickness of the screed is 2-3 cm. Used when there are small differences.
3. Expanded polystyrene boards. Placed on expanded clay. This can correct significant floor unevenness.

The use of GVL will help level the floor. This is especially true when there is a desire to install parquet or laminate flooring. These floor coverings require a perfectly level floor.

The floor structure includes the following elements:

1. Waterproofing and vapor barrier. Polyethylene film separates layers and overlaps. For wooden coverings use glassine.
2. Soundproofing. This is an edge strip that is attached with screws or glue. It must be installed before laying the screed.
3. Leveling is performed using one of 3 types of dry screed.
4. Gypsum fiber boards are secured with glue or screws. It depends on the design of the GVL.

Each element is necessary when installing a gypsum fiber board floor. Any violation of the installation will lead to rapid wear of the coating and its damage. Due to the lack of insulation, operational inconvenience may occur.

Laying gypsum fiber board on expanded clay (video)

GVL has many advantages. You can get a warm and smooth floor. And prefabricated structures can be assembled independently.