The modern building materials market is constantly updated with various new products, which, due to their characteristics and qualities, are beginning to be in high demand among consumers. These innovations include gypsum fiber, or gypsum fiber sheet.
What is GVLV?
Moisture-resistant gypsum fiber is a finishing material in the form of a rectangular sheet and made on the basis of gypsum and loose cellulose for reinforcement, as well as various technical additives. In appearance and structure, this material is similar to drywall, but has many advantages. We will tell you in more detail what a gypsum fiber sheet is. First you need to understand what loose pulp is. This fiber is extremely durable. It is this quality that is widely used in the production of building materials. With the help of special substances, plant cellulose is processed in a certain way, thanks to which they ensure a uniform distribution of cellulose fiber overthe entire surface. By adding technical reagents to the composition, as a result, a finishing material is obtained that has additional qualities, such as increased fire safety and high moisture resistance.
Scope of application
Moisture resistant gypsum fiber sheet is used for finishing residential, industrial, public, office buildings and premises. This material, that is, GVLV, the technical characteristics of which will be described below, is used:
1. For sheathing attics, mansards, basements. In these cases, the premises must be equipped with a ventilation system.
2. For arranging a dry screed. Installation of moisture-resistant gypsum fiber is an alternative to the time-consuming process of making a cement screed with the classic version, but this method is less time-consuming and rather difficult.
3. For finishing bathrooms, kitchens, dressing rooms, utility rooms. Since in these places there is an unstable and most often high level of humidity, it is most expedient to use a gypsum-fiber sheet (moisture resistant) as a finish. To further protect the sheets from the negative effects of the liquid, their surface is treated with hydrophobic mixtures, and moisture-resistant material can be used as a decorative finish.
4. For covering ceilings and walls of garages and outbuildings, for unheated premises where there is a possibility of freezing of walls.
5. For repair work and primary construction of gyms, courts and trainingpremises, children's playrooms. Due to such a property as strength, the gypsum fiber sheet is able to withstand high point loads, retaining its original appearance when hit by heavy objects, such as a sports equipment.
6. For finishing elevator shafts (passenger and freight), for sheathing boiler rooms and panel rooms. During a fire, the finishing material does not collapse for a long time and restrains the spread of flame.
GVLV: specifications
Moisture resistant gypsum fiber sheet has the following technical qualities:
- high level of environmental friendliness;
- excellent performance in terms of heat and sound insulation;
- resistance to fire (GVLV does not ignite);
- high strength and wear resistance, the ability to use it in buildings with a complex configuration;
- ease of installation, the use of gypsum fiber reduces labor costs and construction time;
- GVLV, the technical characteristics of which we are currently studying, is a fairly flexible material, and this makes it possible to expand the range of its application;
- a sufficiently high level of hygroscopicity of the material, which is able to regulate the humidity in the room, that is, with an excess of moisture, it absorbs it, with a lack of it, it releases;
- minimization of waste (provided that a preliminary calculation of the building material was carried out), which saves on costs.
Main technical aspects of gypsum fiber
In the production of gypsum fiber, the dimensions of the sheet (its width) depend on the purpose of the application. Basically, GVLV is produced with a thickness of 10 to 12 mm. The size of the finished product is 2500x1200 mm. Depending on the thickness, the weight of the GVLV ranges from 39 to 42 kg. These sizes are universal and are suitable for almost all types of finishing and construction work. In addition to these sizes, drywall sheets are 14, 16, 19 mm thick. The length of the sheet can be 2000, 2700, 3000, 3600mm and the width is 600mm.
Sheets are produced in two types:
- with seam edge (for walls, ceiling);
- with a straight line (for the floor).
Selection of moisture resistant gypsum boards
When choosing gypsum fiber as a finishing material, first of all, you need to pay attention to the manufacturer. Many recommend purchasing moisture-resistant GVLV from domestic companies, thereby saving on financial resources. When buying this building material, you need to pay attention to the presence of markings and certificates of conformity. Next, you need to visually inspect the sheets - their surface should be smooth, without visible damage. In addition, bulges, chips, cracks and various depressions are not allowed. If possible, it is necessary to determine under what conditions the material was stored. If the sheets were in rooms with a high level of humidity, then in the future this may adversely affect its properties.
Gypsum fiber floor board
GVLV is used for laying on both wooden and reinforced concrete bases. In the presence of good ventilation, it is mounted on a concrete screed. For work it is recommended to use plates of small size - 12 mm thick. Installation is carried out in the following order:
1. An edge tape is attached around the perimeter of the room, a layer of plastic film is laid.
2. Fall asleep expanded clay or put a dense insulation. It is compacted and leveled.
3. They begin to lay gypsum fiber GVLV from the corner.
4. The first layer of plates is covered with PVA glue or mastic. Next, the second layer of gypsum fiber is laid.
5. With the help of screws, the layers are pulled together.
6. At the end, the floor surface is primed, then a finishing coating is mounted, for example, linoleum.
Final finish coats
Despite the fact that GVLV technical characteristics are quite high, surfaces lined with this material must be carefully processed:
1. Gypsum fiber sheets must be primed before applying finishing coats.
2. The surface sheathed with gypsum fiber, on which it is planned to glue the wallpaper, must be treated with methylcellulose-based glue.
3. It is allowed to use paints: dispersion from artificial materials, oil, varnish, epoxy and others.
4. Structural gypsum plasters with artificial resin substitutes can be used.
5. It is undesirable to buy paints based on liquid glass, silicates, lime, andalso alkaline.
Summing up, we can conclude that the GVLV gypsum fiber sheet is a new stage in the development of building materials. It does not have the disadvantages that are inherent in drywall. During the production of gypsum fiber, a number of improvements were made that qualitatively improved the properties of the material.
