Moisture resistant gypsum sheet (GVLV) "Knauf": specifications, application

2024 Author: Aaron Duncan | [email protected]. Last modified: 2023-12-16 03:30

One of the demanded environmentally friendly materials builders consider waterproof gypsum fiber sheets (GVLV) "Knauf". Due to the high technical characteristics of the canvas, they are used quite widely. They are used as a decorative material, lined with walls, floors, create protective structures.

Features of GVLV canvases

In appearance, Knauf super sheets are very similar to drywall sheets, as they are a facing rectangular slab made from a gypsum base, to which additives are added. But there are differences: there are no outer shells, but the composition contains a reinforcing mesh made of fluff pulp. In order for cellulose mesh to provide proper strength, its fibers must be evenly distributed, for which it is treated with special substances.

Without the use of vegetable cellulose, it would be impossible to obtain plates that would be superior in strength to drywall sheets. Besides, inthe composition of the gypsum base, additional reagents are introduced, giving the finished canvases moisture and fire resistance. The price of a gypsum-fiber moisture-resistant sheet is higher than for other similar materials, which is fully justified by its amazing properties.

Material description

Two types of plates are available:

1. Straight edge. (PC). The material is intended for the manufacture of floor bases.
2. With folded edge (FK). From the canvases of this type they equip piers, partitions, they align the walls.

Slabs also differ in size: 250x120x1.0 cm (weight 1 m² - about 1.08 kg) and 250x120x1.25 cm (weight 1 m ^{2 - about 1.25kg). The package may contain 40 or 50 sheets. Accordingly, the price of a gypsum-fiber moisture-resistant sheet depends on its parameters, and the cost of packaging depends on the number of sheets and their dimensions. The price of one sheet is from 200 to 500 rubles.}

Specifications

One of the important properties of gypsum fiber sheets is their strength - 1300 kg/m³. Thanks to this, nails can be hammered into the material, screws can be screwed in. Contribute to the wide application of the technical characteristics of GVLV:

1. Frost resistance. The material can withstand more than 16-17 freeze and thaw cycles.
2. Easy handling. When working with slabs, you can use all the tools that are designed for wood processing.
3. Bending strength. This indicator for Knauf sheets is much higher than for drywall sheets.canvases.
4. Increased moisture resistance provided by anti-chalking agents and sanding.
5. Hygroscopicity. When the humidity in the room rises, the sheet finishing material absorbs it, and when the air becomes dry, it releases moisture, thus improving the microclimate.
6. Fire resistance. The material can serve as excellent fire protection. At the same time, the plates are used as additional thermal insulation.
7. Low thermal conductivity.
8. Low mass of cloths (39-43 kg). Thanks to this, there is no excessive load on the load-bearing walls.
9. Additional soundproofing.

In addition, canvases are highly wear-resistant, so their use allows you to forget about the repair of structures for which this material was used for a long time.

Material advantages

The main advantages of GVLV "Knauf" experts believe:

1. Increased strength. Gypsum fiber boards are able to withstand high point loads and still retain their original characteristics.
2. High fire resistance.
3. Excellent moisture resistance.
4. The ability to significantly increase the speed of installation work.
5. Economy. Knauf sheets are light in weight, so there is no need to make building structures heavier.
6. Environmental cleanliness. The plates do not contain toxic substances, and the acidity level matches the acidity of human skin.
7. Matchchemical and technical parameters to world standards.

Also, the important advantages of the coating include the fact that the use of GVLV "Knauf" for finishing surfaces in the room eliminates "wet" processes.

Scope of application

GVLV with high waterproof properties is used for installation in premises of any purpose, from living rooms to industrial facilities. This number includes buildings:

1. With any degree of fire resistance, including the first.
2. Various number of storeys.
3. All types of structures and systems.
4. Any fire danger level.
5. Built in any climate region.

The use of plates is not affected by the engineering and geological conditions of the facility under construction, as well as the climate of the region where the work is carried out. Use material for installation indoors at facilities where the indoor environment is non-aggressive, and the humidity conditions are medium.

Features of using canvases

Most often Knauf gypsum fiber supersheets are used:

1. To protect enclosing, load-bearing and other structures that must have the required level of fire resistance. This number includes ceiling and wall surfaces of stairwells, elevator lobbies, lobbies.
2. To create floors, partitions, claddings using a frame.
3. For the protection of wooden elements (coatings,floors, attic floors).
4. For the manufacture of channels for laying cables, communication shafts, beams, columns and other elements.
5. For comprehensive fire protection and soundproofing.
6. For dry floor screed.

Floor laying technology

Medium-sized Knauf gypsum board can be laid on a concrete screed if the room has a good ventilation system. Large slabs are laid on wood or reinforced concrete surfaces.

Carry out the installation of canvases according to the following scheme:

1. Carefully clean dust and debris from the surface. If cracks or other similar defects are found, they are pre-sealed.
2. First of all, polyethylene is laid to protect the material from moisture.
3. Edge tape is laid around the perimeter of the floor, which will act as a sound absorber.
4. Set up the beacons needed to position the guides.
5. Lay down the guides needed to accurately level the insulation layer.
6. Expanded clay falls asleep. The material is leveled and rammed.
7. Starting from the corner of the room, GVLV sheets are laid (weight - up to 40 kg).
8. The first laid slabs are fixed with mastic or adhesive solution.
9. On top of the first layer of GVLV "Knauf" for the floor, another layer is laid, connecting it with the previous screws.
10. After completion of installation work, the floor is primed and then the outer coating is laid.

Creationsoundproof partitions

Due to the fact that the material has high soundproofing properties and ease of installation, often the owners of apartments and houses themselves undertake the installation of sound-absorbing partitions and improve the sound insulation of external walls. To get the perfect noise protection, the plates are mounted not in one layer, but in two.

Taking into account the technical characteristics of GVLV, the use of sheets is possible both in heated and cold rooms for any purpose, including garages, attics, basements, warehouses and places where the level of fire danger is quite high. Suitable material for use in rooms with a high level of humidity - bathrooms, kitchens, basements.

There are several important rules that must be observed when creating partitions:

1. Choosing the location of the structure. First, mark the location of the line on the floor surface, taking into account the direction of the wall. Then the lines are duplicated on the ceiling using a plumb line.
2. Correct selection and installation of profiles. They should not come into contact with wall and floor surfaces to ensure sound insulation. To do this, elastic material is placed under the profiles.
3. Preparation and installation of racks. They should be of such length that they freely fit into the space allotted for them.
4. Connecting racks and rails.
5. Strengthening wall openings with stiffer profile elements.
6. Installation of electrical wiring and embedded parts in the inside of the frame.
7. Preparation of supersheets"Knauf". They are marked and cut off the excess.
8. Mounting sheets. They are fixed with special screws on both sides of the frame. If necessary, a heater is installed between the canvases.
9. Filling the resulting seams.
10. Priming surfaces.
11. Finishing.

Recommendations from experts

There are several important points to consider when using moisture-resistant canvases (GVLV) "Knauf":

1. Installation of plates must be carried out during finishing work before the installation of clean floors, but after the plumbing and electrical systems are divorced and all "wet" processes are completed. If installation work takes place during the winter period, it is necessary to work with sheets with the heating turned on.
2. Before work, the GVLV must acclimatize indoors. To do this, they are entered in advance, a few hours before the start of work.
3. If the sheets are stacked in several layers, the work must be completed in one day.
4. Before starting puttying work, the joints are treated with a branded primer.

If work is carried out in rooms where water can get on the surface of the sheets, they are treated with waterproofing mastic. A waterproofing tape is used to protect the junctions.