Quite often today, DSP is used for flooring. DSP slabs relevant for installing a floor surface, especially if you need to make the floor level in the shortest possible time. It is this building material that helps speed up DIY repairs. Due to the fact that the building material is natural, it is environmentally friendly and clean. In addition, DSP is quite inexpensive, and the floor surface is durable, beautiful and durable.
Characteristics of the material and laying of CBPB
The CBPB board consists of 65 percent cement, 24 percent wood chips, 8.5 percent liquid and 2.5 percent impurities, which are similar liquid glass and aluminum. It is cement that gives building materials reliability and the longest possible service life. The usual size of a cement bonded particle board is 320×125 cm, and the thickness can be from 1 to 4 cm. However, the dimensions may vary. A special indicator for this building material is density. It should be no more than 1300 kg per m2, and the humidity should be approximately 6-12 percent.
If the slab is in contact with liquid for 24 hours, the canvas should not swell by more than 2 percent.
The surface of the DSP is rough, it depends on the grinding method. But if the roughness is no more than 80 microns, then the use of grinding can be avoided. Due to the fact that you can choose a material of a certain thickness and smoothness, it is possible to solve the problems posed when finishing any room.
You can get acquainted with the characteristics of the DSP material yourself in specialized stores.
In addition, there are other advantages:
- High reliability. Strength is good due to the multi-layer material.
- Long service life.
- The material is very elastic because the 2 outer layers are made of small chips, and longer particles are located inside.
- There is no need to level the CBPB, the slabs are smooth
- Environmentally friendly.
- Fire resistance. The composition of the DSP includes additives that reduce the risk of fire.
- Resistance to mold, fungi and rot.
- High moisture resistance.
- Resistance to temperature changes.
- Resistance to abrasive substances.
- Easy styling.
- High sound insulation.
- Affordable price.
- Waterproofing.
Among the disadvantages, we can talk about the large weight of the material and the inconvenience during the cutting process due to heavy dust. But, the advantages naturally outweigh the disadvantages, so they prefer to choose the material and lay everything on their object larger number consumers.
Easy installation of chipboard on a wooden floor
Thanks to its unique performance properties, cement bonded particle board can become a replacement concrete screed. The screed is difficult to install, but the dry slab is installed very quickly and is convenient to work with. This fabric is durable, as it has the highest ability to withstand heavy loads.
It is necessary to select slabs based on thickness; the greater the traffic flow of the room, the thicker the material should be.
However, despite the fact that the characteristics of the material are unique, despite the excellent performance indicators, it is important to lay the slabs correctly. This is the only way to preserve all the positive qualities and functions of the building material.
At laying CBPB on wooden floor slabs should be selected according to thickness
The use of cement bonded particle board is possible for:
- Insulation of buildings.
- Interior finishing.
- External works.
In addition, today DSP is often used for finishing floor surfaces. This building material can be installed in rooms with high level moisture. Typically, cement bonded particle board is laid under tiles or porcelain stoneware.
This is due to the fact that it is porous tiles or porcelain stoneware that require flawless level base.
Even the smallest bump or depression can cause cracking on the surface finishing coating. Also floor coverings made of cement particle boards used to create 3D structures, because in this case a reliable rough foundation is needed. And if we consider a solution with the installation of a “warm floor” system, then at the same time both a perfectly smooth surface and good thermal insulation, which will retain heat without allowing it to escape.
DSP on the floor along the joists
There are two requirements for a block of wood: it must be well dried and must be treated with an antiseptic agent so that rot and mold do not subsequently develop. Instead of a store-bought product, it is possible to use treatment with used machine oil.
This event has 2 advantages: low cost and the absence of extraneous aroma.
If CSP floors are installed on cement, then the section of the block can be reduced to 50 to 50, so as not to take away precious centimeters from the room. When arranging the overlap, it is necessary to maintain the horizontal level of the wood logs. The first bars are placed along two opposite vertical surfaces, and a fishing line is stretched between them.
The distance between the logs should be approximately 50 cm. Next, at the same distance, you need to secure the ribs for the transverse sheathing. It must be fixed with self-tapping screws or dowel-nails, and for strength, plywood or gypsum fiber board must be attached to the joists. The insulation can then be laid.
If you need to install DSP on logs, then you definitely need to think about floor insulation
For this you can use any thermal insulation material.:
- Styrofoam.
- Foil polypropylene.
- Cork.
- Minvata.
They begin to install floors on logs made of DSP, distributing the sheets around the perimeter of the room. The sheets that need to be cut are marked with a marker using a ruler. It’s good to cut the material with a grinder, but if you don’t have one, you can use a hand saw.
The material is easy to cut, but it generates dust, so you need to wear a mask. Floors on joists are installed from DSP with obligatory spacing at the seams.
The sheets are attached to a wooden beam using fasteners, and the distance between them is subsequently puttied or closed with a special tile adhesive. It is not uncommon for bumps to form at the junction points of the CBPB, which will further negatively affect linoleum or cork coatings. These defects can be removed by sanding and puttying individual areas of the floor. It is good to treat the top with a substance that has a waterproofing effect, especially if the floor is laid in a room with high humidity.
Dry screed on a wooden floor
In fact, installing screeds on wooden floors is not at all difficult.
Installing a dry screed on a wooden floor is not difficult, even a beginner can handle it perfectly.
A sealant is used as the bottom layer - this can be:
- Construction mixture;
- Mastic;
- Traditional PE film.
Next, a reinforcing mesh is installed on top of the sealant, which is then filled with a mixture of cement to a level that is marked in advance on the vertical surfaces. All measurements and marks must be made using special construction tools, otherwise the screed will not be even, and it will be impossible to lay the DSP, much less the finishing coating. In order for the surface to be smooth, the mixture must be well leveled immediately after pouring, but before installing the coating, it is necessary to thoroughly prepare the wooden floor. Antiseptic treatment, cleaning, polishing.
Laying gypsum fiber board on a wooden floor (video)
So, for interior renovations, it is best to use smooth slabs, since they are easy to paint, plaster, etc. DSP is a universal building material that is used for the construction and finishing of not only warm, but also cold rooms.
One of the most important stages During floor finishing, a leveling layer is formed. Long time the most acceptable way to level floors was considered to be laying chipboard sheets, DSP or fiberboard and wooden floor. Today appeared on the market new material, characterized by ease of installation and high performance characteristics. These are gypsum fiber sheets or gypsum fiber boards that can be laid on the floor surface for leveling.
What is gypsum fiber sheet?
GVL are slabs made from reinforced gypsum and fluff pulp. Thanks to a special manufacturing technology, the material has a uniform structure and high density. It is these characteristics that provide gypsum fiber with advantages over plasterboard, chipboard and fiberboard.
Gypsum fiber board can be regular or moisture resistant (GVLV), which allows this material to be used for finishing any premises.
The increasing interest in this recently appeared material can be explained by numerous advantages, including:
- High strength. Cellulose reliably binds and holds the gypsum;
- Fire safety. Unlike wood boards(chipboard and DSP) gypsum fiber does not catch fire, but chars;
- Versatility. GVL can be laid on almost any base, and finishing make it with parquet, tiles, laminate or carpet;
- Easy to install. Installation of the leveling layer is carried out quickly, without unnecessary waste, debris and noise. On average, it will take 1-2 days to install a leveling layer of gypsum fiber boards.
In addition to the listed advantages, one can also note the high sound insulation of the material and its ability to retain heat well. A floor made of gypsum fiber boards, unlike chipboard and fiberboard, will not creak or knock, and will not deform when temperature conditions change.
Details about all the advantages of this material explained in the following video:
As you can see from the video, GVL really has many advantages. But gypsum fiber does not have many disadvantages, and the most significant is its relatively high cost.
Preparing the base
In the case where gypsum fiber sheets will be laid on a wooden floor, careful preliminary preparation grounds. Similar preparation is carried out when laying any sheet materials(Chipboard, DSP and so on).
First, the condition of the floor is assessed. To do this, you need to remove the boards and inspect the entire structure.
Most often, GVLV are affected by rot. Regardless of the type of rot, the affected areas become softer. You can check the condition of the wood as follows: drive an awl into a place that differs in structure or color. If the instrument enters easily, the area is affected. Small fragments are removed; in case of significant damage, the structural element is completely replaced. Next is everything wooden parts must be treated with an antiseptic composition.
Depending on what kind of finishing coating you will need, additional installation lags. The next stage of floor preparation work is to check them building level and alignment. In some cases, unevenness can be corrected by adjusting the joists: the excess is removed with a plane, and wedges are installed or bricks are placed to raise the floors.
Leveling the surface of the floor boards is carried out in the same way as when laying fiberboard. First, you need to deepen all protruding heads of nails or screws. Then the surface is checked with a level, and all convexities are removed with a plane or grinder. The cracks and chips are sealed with putty. Fine expanded clay can be poured into depressions more than 2 cm deep.
Stages of laying gypsum fiber sheets
To the prepared wooden base vapor-permeable material should be laid. This can be glassine or waxed paper. To avoid deformation of GVL slabs during operation, insulating tape is used. It is made from mineral wool or polystyrene and has a thickness of 10 mm and a height of 10 cm. The tape is glued along the entire perimeter of the room. Upon completion of work, the protruding tape can be removed.
After graduation preparatory work proceed directly to laying GVLV slabs. Markings are applied to the sheets taking into account the gap for the insulating tape and, if necessary, cut. To avoid damaging the slab during cutting, it is recommended to place it in a horizontal position on flat surface. Cut the material with a hacksaw or construction knife. Shaped holes are made using round cutters.
The gypsum fiber should be laid on an adhesive mixture and then secured with self-tapping screws. The fasteners are screwed along the perimeter of the slab, recessing the caps 2-3 mm into the material. The distance between the screws for fastening large-format sheets should be 30-35 cm, and for small-format sheets - 20 cm. Particular attention should be paid to the choice of screws. Laying gypsum fiber should be done using double-threaded screws and a self-countersinking device.
An important point is also correct placement sheets on the floor. The joints of the gypsum fiber boards should not coincide with the joints flooring. It is advisable to place the slabs at an angle of 45 degrees to the boards. In rows they should also be offset relative to each other. The same applies to laying a two-layer coating: the elements of the top layer are placed perpendicular to the elements of the bottom, and the distance between the seams of both rows should not be less than 20 cm.
You can learn how to properly lay gypsum fiber boards on the floor from the following video:
This video material talks about a two-layer floor covering made from special sheets. Laying them is much more convenient due to the presence of a special fold for the lining.
Typically, to create durable coating It is enough to lay gypsum fiber boards in one layer, however, if it is necessary to strengthen the base, it is recommended to use just such double sheets.
What you should pay attention to?
Unlike the installation of other sheet materials (chipboard, fiberboard, plywood), laying gypsum fiber has its own characteristics. In order for the dry screed to be of high quality, it is necessary to pay attention to and check the following nuances:
- The width of the gaps between adjacent sheets should not exceed 2 mm, and all screw heads should be recessed deep enough into the plaster to avoid damage to the finish coating;
- Residues of adhesive protruding onto the surface after installation must be removed; the composition should not accumulate inside the joints and on the sides adjacent to the walls;
- The extreme folds in two-layer sheets are cut off.
Final work
The last step is correct processing the resulting surface. All joints and places where screws are attached are sealed with a special gypsum putty. Additionally, reinforcing tape should be laid and pressed over the joints. If fiberboard is laid on a wooden floor, then it is necessary to use wood putty.
Did you know that drywall is used for sheathing? frame structures has its own analogue, which can be used when installing flooring - a special gypsum fiber sheet (GVL) for the floor? The composition of this finishing material includes pressed gypsum, reinforced with dissolved cellulose with the addition of various technological “additives” that increase the strength and moisture resistance of the product.
Note that such a sheet has one feature that makes it easy to distinguish it from its plasterboard counterpart: it has a homogeneous structure with the absence of a cardboard shell. Today we will try to talk about this material in more detail - we will look at the main characteristics of its types, give advice on their use, and also talk about the nuances and features of the technology for laying gypsum fiber board floors.
Types of GVL slabs
Durable and environmentally friendly gypsum fiber is produced in the form of rectangular slabs with straight (PC) and folded (FC) edges. Specialists from KNAUF, a constant leader in the production of high-quality finishing materials, distinguish two types of gypsum fiber boards with different operational properties, defining the scope of their application:
- Standard GVL board has high strength, hardness and fire safety. Can be used for finishing industrial and residential premises with normal humidity levels. Available in the form rectangular sheets 2500 long, 1200 wide and 10 or 12.5 mm thick.
- Moisture-resistant GVLV board is a material treated with special hydrophobic substances with high moisture resistance. It is used in rooms with high humidity: bathrooms, showers, toilets or kitchens. Suitable for finishing attics, basements and garages. Available in both regular (2500x1200x10 or 12.5 mm) and small-format versions 1200x1200x10 mm for more convenient installation.
The KNAUF company produces special type GVL is a floor element (EP) “KNAUF-superfloor”, made by gluing two mutually offset sheets of GVLV 1200x600x10 mm. The edges of the product have folds 50 mm wide, its total thickness is 20 mm. The advantage of the EP slab is that it is completely ready for installation in the KNAUF prefabricated floor substructure.
Sheet characteristics
In addition to hardness and strength, which is achieved due to the high concentration of the reinforcing element - cellulose, the material has a lot of other positive characteristics:
- Possibility of use in any form interior decoration– GVL slabs are used for flooring, installation interior partitions, wall and ceiling cladding.
- Humidity control - the structure of the material allows you to dry the room by absorbing excess moisture, and also “give” it back when the air becomes drier.
- High viscosity - the product is easy to install and does not crack or crumble during processing.
- Low thermal conductivity – excellent thermal insulation properties material allow it to be used as a reliable insulation. This property is most in demand when using gypsum fiber board sheets for laying floors.
- Non-flammability - gypsum fiber is used as fire protection buildings and building structures. In the event of a fire, the material can prevent the fire from spreading to adjacent rooms and limit its access to important communications.
- Light weight - lightweight (about 18 kg) gypsum fiber boards do not create serious additional load on load-bearing floors, their transportation and installation are not particularly difficult.
- Possibility of laying GVL on a wooden floor or concrete base– work on installing the floor covering is carried out in a fairly short term. You can lay carpet, parquet boards, linoleum, laminate or tiles on the finished surface.
- Frost resistance - gypsum fiber boards can withstand repeated freezing and thawing, which allows them to be used in cold unheated rooms: garages, garden or country houses.
Features of using GVL for flooring
Today, most craftsmen prefer the dry method of leveling the floor. Unlike “wet” screed, this method avoids the following problems:
- use additional materials(concrete, sand, cement, gravel);
- education large quantity construction waste and dirt;
- time spent waiting for the cement mortar to dry.
Leveling the surface in this way is not only easier, but also much faster - after laying the gypsum fiber board on the floor, you can immediately begin its final finishing.
Note that the application modern materials For finishing cladding flooring requires the construction of a reliable and absolutely level base. Naturally, not all coatings can boast excellent heat and sound insulation characteristics, so a screed made of gypsum fiber sheets will be the best option.
It should be added that for carpet, linoleum or laminate, these sheets can serve as a backing.
Installation of gypsum fiber boards
Installation of gypsum fiber board floors can be carried out on any base - you just need to take into account some features of the installation technology. If increased requirements are placed on the thermal insulation of a room, then the gypsum fiber will have to be reinforced with other materials, for example, expanded polystyrene boards.
The structure of the gypsum fiber board allows the installation of a “warm floor” system on its surface. However, it should be remembered that the use of thick gypsum fiber board floor elements in this case is not recommended - ordinary sheets with a thickness of 10 mm are quite suitable.
Hidden gasket of various engineering systems is another undeniable advantage of dry screed.
Preparing the base
Before starting installation activities, you should prepare the base by insulating it and installing guides. When leveling floors in residential premises, expanded clay with a granule “caliber” of no more than 50 mm can be used as insulation. Under the insulating layer it is necessary to lay waterproofing - PET film, roofing felt or glassine.
Guides from wooden beam, which need to be mounted on the surface of the base of GVL floors, will perform two functions at once:
- a reference point that determines the level of insulation backfill;
- lathing for laying and fastening gypsum fiber boards.
After filling the expanded clay, it must be leveled using a rule, leaning on the guides, and carefully compacted, turning Special attention to the corners of the room.
Installation process in stages
The process of installing a dry screed is a labor-intensive and responsible undertaking that must be carried out in several stages in a certain sequence:
- We lay along the wall near the floor mounting tape, which will absorb impact noise and compensate for deformation from load and temperature fluctuations.
- We lay the first layer of gypsum fiber board for the floor, installing the sheets from the angle closest to front door into the room. We fasten the slabs to the sheathing using self-tapping screws of the required length.
- Apply to the finished surface adhesive composition and install the second layer of slabs, laying them “in a staggered manner” with an offset of 250–300 mm. For reliability, it can also be attached to the sheathing using longer screws.
We have already talked about ready-made floor elements in the form of sheets, which are glued with an offset, forming folds for a more reliable connection. If you care about the strength of the floor and want to simplify its installation, then this is just your choice. The only remark is that this material is somewhat more expensive than its standard counterparts.
Nuances in the work of laying gypsum fiber boards
During the installation of dry screed, several nuances arise that need to be given the closest attention:
- Make sure that the width of the gaps between the plates does not exceed 2 mm. Before laying the finishing coating of linoleum or carpet, you will need to putty both the seams and the screw heads.
- Remove excess adhesive solution, do not let it accumulate in the seams and against the walls.
- At the end of the work, apply a layer of primer to the surface of the new floor, which can “combine” with the applied adhesive composition.
- If the installation of GVL floors includes ready-made panels, cut off the folds from those edges that will be adjacent to the main floors and strengthen the edges of the sheets to the guides using self-tapping screws.
- When installing a “warm floor” system, you should lay an additional layer of insulation from polystyrene foam boards– they will prevent heat loss through the base of the floor.
In conclusion, I would like to note that today’s approach to repair requires the use of modern materials and the application of new technologies. We believe that installing a screed with using GVL for the floor fully meets this rule. Most professionals prefer this method of surface leveling, rightfully considering it the simplest, fastest and least expensive. What do you think about this?
Everyone knows plasterboard sheet, which has already firmly entered the ranks of the most famous materials for interior decoration. But what if there is another material that is superior to drywall? Interested? Then read the article about gypsum fiber sheet - strong and reliable material for finishing the floor.
Gypsum fiber sheet (GVL) is a finishing material that made from gypsum and reinforced with various additives, as well as cellulose. Its peculiarity is in a homogeneous material, which does not have a cardboard shell. There are two types of such material: GVL and GVLV (moisture-resistant gypsum fiber sheet).
The first type can be used in residential and industrial premises with a dry atmosphere, and the second - in buildings where humidity is high. Gypsum fiber sheet is a compressed material that consists of gypsum and finely ground paper. Waste paper adds GVL good strength, and gypsum binds its parts into a sheet.
Advantages and disadvantages of GVL for floors
- heavy weight;
- improper handling increases fragility during installation;
- high cost compared to drywall.
When choosing, you need to take into account that it is better to buy gypsum fiber sheets trusted manufacturers. For example, KNAUF products outperform Russian materials in some fairly significant indicators. If you buy GVLV, then check the markings each sheet, since dishonest manufacturers can dilute moisture-resistant boards with ordinary ones, which is difficult to notice at first glance.
Material Specifications
GVL is a sheet sanded on one side, which impregnated with a water repellent and a specialized anti-chalking compound that acts as a primer.
Length standard sheet is 2500 mm, width - 1200 mm, thickness - about 10 mm. If desired, the sheets can be other sizes.
Other specifications, which any GVL must comply with:
- Humidity - less than 1.0%.
- Density - no more than 1200 kg/m3.
- Bending strength is more than 5.5 MPa.
- Hardness - more than 22 MPa.
- Thermal conductivity - 0.22−0.35 W/m*ºС.
At high humidity GVL absorbs moisture and when dry, on the contrary, it releases it back. During production, gypsum fiber sheets undergo strict testing, as a result of which they receive certificates of conformity corresponding to GOST level.
Technology for laying gypsum fiber board on the floor
Before installation you should take off old material
to inspect the floor and further actions. If there are irregularities, they must be eliminated, cracks on the surface must be filled with cement mortar or mounting mixture. You can use floor bedding for better prepare it for installation, after this, there is no need for additional thermal insulation unless you want better protection from cold and noise.
Now let's move on to laying the slabs themselves:
- First, the tape is glued, which is necessary to compensate for changes in the material due to temperature changes. It needs to be fixed along all the walls of the room in the place where the gypsum fiber boards will be laid. If you have not leveled the floor or insulated it, then treat it with a deep-penetrating primer.
- Next, we fix the sheets to the finished base using glue and self-tapping screws (they need to be screwed in every 35-40 cm around the perimeter of the gypsum fiber 2 mm inward). Make sure that the sheets are laid evenly; the seams should not extend less than 20 cm.
As for the number of layers of gypsum fiber sheets, in most cases one is enough, but you should remember that if you are planning to lay second layer, then the sheets should lie perpendicular to the components of the previous ones, displacing the seams of adjacent rows; they are also attached with glue and self-tapping screws. But to make it more convenient, you can use special sheets that glue the slabs during installation. Their installation it will be easier to go since they have a smaller thickness and a seam that will help put one sheet on top of another.
Now comes the final part. Firstly, it is required joint processing between the plates. Take either putty or the remaining glue, apply it to the seams and press the reinforcing tape. Putty also should be sealed those places where the screws were attached. If you are placing gypsum fiber in a bathtub or other room with high humidity, then it is better to resort to additional waterproofing in the area of the seams and walls.
After 24 hours of completion of work, you can start finishing the floor. The material that is laid on the gypsum fiber board can be anything, it is tile or linoleum - it all depends on your desire.
Floor is much more than just a surface that each of us comes into contact with every day. From the point of view of professionals, gender - complex design, consisting of a rough base, a leveling layer and a finishing coat. Forming a leveling layer is a labor-intensive task, the quality of which determines the final result. And if previously the most common option for creating a screed was considered to be the “wet” method, which, by the way, had many disadvantages, today a gypsum plaster floor acts as an advantageous alternative.
What is gvl?
Gvl (gypsum fiber sheets) - finishing material, which is made from reinforced gypsum and fluff pulp. Features of raw materials - homogeneous structure and high density. This combination has many advantages compared to plasterboard and fiberboard. In terms of moisture resistance and environmental friendliness, gypsum plasterboard has no equal, which is why dry gypsum plasterboard floors are used in modern construction more often.
GVL demonstrates excellent heat-saving and sound-proofing characteristics and is the best substrate and under carpet, and under laminate, and under linoleum. Let's install a "warm floor" system. Due to the fact that the installation of gypsum fiber floors is carried out according to the “dry” principle, you save time, effort and money.
Advantages of gypsum fiber sheets
GVL sheets for flooring have numerous advantages, which explain the increased interest in this material.
- strength. A high concentration of cellulose, acting as a reliable binding element, makes the sheets strong and durable;
- fire safety. Gypsum fiber is resistant to fire - when exposed to fire, only the top layer suffers. However, it does not catch fire, but chars;
- versatility. You can lay the gypsum board on a wooden floor or on reinforced concrete structures and then cover parquet board, porcelain tiles, laminate or linoleum;
- ease of installation. Laying is done in the shortest possible time. In addition, the work will take place without unnecessary dust and dirt;
- It’s easy to hide utility lines under the sheets;
- low weight facilitates transportation and installation;
- GVL floors do not creak, do not knock, do not sag and are able to withstand heavy loads.
Technical specifications
Gypsum fiber sheets are presented in 2 variations: simple and moisture resistant. Simple ones are optimal for interior decoration of rooms with a normal level of humidity, and moisture resistant ones will become profitable solution where a hydrophobic layer is needed (in kitchens, bathrooms, toilets).
Besides this, there is another distinction. Depending on the size, there are standard and small-format gvl. The former are used not only for arranging the floor, but also for forming partitions, leveling walls, and creating a variety of architectural elements. Dimensions 1200x1500 mm. The second ones are 2 sheets with intersecting central axes, which are shifted in vector directions. This is how a simple lock system- folded. Such gvl for the floor have dimensions of 1500x500 or 1200x600.
As for the technical characteristics, they are as follows:
- weight - no more than 18 kg;
- width - up to 50 mm, length - 1.5 m, thickness - up to 20 mm;
- usable area - up to 75 sq.m;
- hardness - from 20 MPa;
- thermal conductivity - up to 0.36 W/m.
It is easy to transport gvl - the material is packaged and delivered to its destination on special pallets. It is recommended to store the sheets in a room with low humidity, and cut them in a horizontal position on a flat surface.
Types of dry gypsum plasterboard screed
- base prefabricated 2 cm high. Recommended if the base is insulated and does not have significant differences in height;
- rough floors covered with foam plastic (2-3 cm). The best option in the presence of unevenness and the need for insulation;
- prefabricated floor on polystyrene slabs laid on a layer of expanded clay 2 cm thick. This scheme is good for floors with significant differences in height.
Separately, I would like to dwell on a prefabricated screed, which includes several layers:
- steam and waterproofing layers that separate the floor “pie” floors;
It is important!
If the floors are made of reinforced concrete, then polyethylene film acts as a layer, but if a wooden floor is laid, then glassine is used.
- compensation and soundproofing gasket. The edge tape is secured with screws or glued. Tapes are produced from various materials: from basalt wool, isolona, foam film;
- leveling layer;
- GVL slabs laid in 2 layers and tightened with self-tapping screws.
Installation of gypsum fiber floors
Work begins with standard training surfaces. The subfloor is repaired and sanded if necessary. If the base is wooden, then check the reliability of the joists and the horizontal position of all structural components.
Small irregularities can be eliminated using a repair solution that fills cracks and crevices. To level depressions larger than 20 mm, fine expanded clay is used. Next, waterproofing is laid on the subfloor. For a concrete floor, polyethylene 0.2 mm thick, overlapped, is suitable; for a wooden floor, vapor-permeable materials (glassine, waxed or corrugated paper) are suitable.
An insulating tape made of mineral wool or polystyrene 1 cm thick and 0.1 m wide is glued along the contour of the floor.
It is important!
Insulating tape is necessary to prevent swelling and cracking of gypsum board sheets.
Then the gypsum fiber is cut, taking into account the edge gaps, and insulation is poured. It is better if it is fine-grained expanded clay, quarry or river sand. The amorphous insulation is aligned according to the marks marked using a level meter. Minimum thickness backfill - 20 mm.
The resulting layers are insulated with glass wool or polystyrene, cut into small blocks. GVL slabs are mounted on top of the “pie”, and the gap between the gypsum fiber components should not exceed 1 mm.
If the installation starts from the wall opposite the door, then in order not to injure the insulating layer of the slabs, you should build some kind of “islands” for movement. It is recommended to start installation of the gypsum plasterboard leveling system from the opposite wall.
After the first layer of screed has been laid GVL sheets covered with PVA dispersion or adhesive mastic. A second layer of dry screed is laid on top.
It is important!
The elements of the second layer are mounted perpendicular to the elements of the first.
To connect large-format sheets (in addition to glue), self-tapping screws (30 cm pitch) are used. Small-format sheets are smeared around the perimeter with glue and also fastened with self-tapping screws, but in increments of 20 cm. Please note that fasteners intended for simple drywall not suitable, screws with self-countersinking device and double thread are required.
There is no need to worry about the large consumption of small-format material, because... the trimmings obtained in the mate area are transferred to the next row. The installation of gypsum boards on the floor is completed, all that remains is to seal the joints and places where the screws are installed with putty, remove the remaining protruding edge tape and waterproofing.
Some installation features
Sheets are trimmed only after the last row has been laid. In other words, at the wall opposite the one from which the work began. This will allow you to achieve at least a 25 cm spread in each layer, which is the main condition high-quality styling. In the first layer, the width between the seams should not exceed 2 mm.
Double dry floors, glued together in production, are similar in installation principle to small-format slabs. With the help of folds on which glue is applied, the gvl is joined. The folds extending onto the walls are cut off, and the slabs are tightened with fasteners.
- cut gvl is better on a hard surface using a hacksaw or construction knife;
- when cutting, take into account the gaps on the edge of the insulating tape;
- if it is necessary to create shaped holes, make punctures in the tiles and use round cutters;
- The joints of the sheets must be treated with a primer. To reinforce the edges, serpyanka (sticky fiberglass mesh) is most often used. The putty is applied in 2 layers.
GVL flooring is a great opportunity to get a perfectly flat surface on which you can lay any finishing material. It doesn’t matter whether it’s tiles, parquet or parquet - an impeccable result is guaranteed, because GVL slabs, without a doubt, will cope with the task of arranging a subfloor better than other materials! It remains to be seen in practice!