Moisture-resistant drywall: types, characteristics and reviews of application. Gypsum fiber or plasterboard: which is better, what is the difference and areas of application

Production technologies building materials are constantly being improved. Manufacturers are trying to take into account all the needs of the market; external and internal cladding are acquiring more and more useful specifications.

GCR has been used in interior decoration for no more than fifteen years, and companies annually offer us improved versions of this universal type of interior decoration. What is the difference moisture resistant drywall from ordinary gypsum board, and what new properties and characteristics has it acquired?

Bathroom tiling

Specifications

Cut of gypsum plasterboard, resistant to moisture

The difference between moisture-resistant drywall and conventional plasterboard lies in the production technology and technical characteristics.

The production process consists of the formation of a flat continuous strip with a width of 1200 millimeters and various cross-sections. Plasterboard moisture-resistant sheets consist of two outer layers of cardboard with a core made of gypsum dough with reinforcing additives.

Moisture resistance of gypsum boards is achieved by treating the outer layer with special water-repellent and antifungal compounds. The composition of the water-repellent mixture is the know-how of each manufacturer and is therefore not disclosed.

Important. Moisture-resistant plasterboard sheet is used for finishing rooms with high humidity, which are provided with constant exhaust ventilation. The manufacturer guarantees moisture resistance when protecting the surface with waterproof primers or moisture-resistant polyvinyl chloride coatings.

Drywall Volma
Dimensions of moisture-resistant drywall
Waterproof drywall

Material markings and dimensions

This type of cladding allows you to create a wide variety of geometric designs

According to GOST 6266-97, moisture-resistant plasterboard sheets are divided into two groups according to the number of permissible defects per certain length - “A” and “B”. Of course, it is better to purchase gypsum boards of group “A”, this cladding is different best quality, but at a slightly higher price.

Many buyers ask the question - how to distinguish moisture-resistant gypsum plasterboard from regular one? Of course, you need to study the technical documentation. But you can also determine by coloring which gypsum board is resistant to moisture.

Moisture-resistant wall plasterboard is always painted green or light green; some manufacturers offer plasterboard painted in pink color. It depends on the manufacturer.

Moisture resistant plasterboard sheets are marked with the following abbreviations:

GKLV– a moisture-resistant finishing option used in rooms with high air humidity, provided with an exhaust ventilation system;
GKLVO – finishing material, resistant to high humidity, with increased resistance to open flame.

Sheet sizes depend on the surface being coated

Facing gypsum board is available in the following standard sizes:

Length from 2000 mm to 4000 mm in increments of 50 millimeters;
Width – 600 and 1200 millimeters;
The thickness of moisture-resistant gypsum board depends on the manufacturer and can have the following dimensions - 6.5 - 8.0 - 12.5 - 14.0 - 16.0 - 18.0 - 29.0 - 24.0 millimeters. It is worth noting that optimal thickness GKL for finishing residential premises - from 12 mm and above;
Also, in agreement with the customer, the manufacturer can form the cladding the right size, for example, small-format drywall. This type of gypsum board is very often used for finishing small bathrooms and bathrooms.

Facing tiles on a gypsum plasterboard box

Important. Before purchasing finishing materials, you need to calculate in advance the consumption of finishing and the dimensions of the surfaces to be coated. This will help reduce the cost of repairs.

After all, installation of moisture-resistant drywall is carried out on surfaces of different sizes. Therefore, it is advisable to calculate the required number of sheets in advance. different sizes so that there is less waste.

For example, the Leroy Merlin supermarket offers a wide selection of finishing materials of all sizes, so you can always choose the ones you need.

GKL edge type

Options for gypsum board edges

The quality and beauty of the cladding largely depends on what type of edge was chosen. This is especially important if the repair is done by yourself, without the involvement of professionals. Although the price for some cladding options with a longitudinal edge convenient for installation is slightly higher, this makes installation much easier.

Based on the type of longitudinal edge, gypsum boards are divided into the following types:

PC – straight edge. GKL is intended for dry installation, without sealing joints;
UK – thinned edge. The installation instructions provide for puttying the joints using reinforcing tape. For example, the Volma company offers high-quality finishing materials with this type of edge at a very competitive price;
PLC – Semicircular edge surface on the face of the sheet. Allows you to putty joints without using reinforcing tape;
PLUK - A semicircular edge thinned on the front side, which allows you to putty joints, both with and without the use of reinforcing tape;
ZK - a rounded edge surface, involves installation of cladding followed by starting and finishing plaster.

Important. Since the end edges have rectangular shape, then when joining seams it is necessary to chamfer them by 1/3 of the sheet thickness.

Properties and installation features of moisture-resistant plasterboard

Bathroom tiled with moisture-resistant plasterboard

Since the use of moisture-resistant plasterboard most often takes place in bathrooms, bathrooms and kitchens, it has the following properties:

Environmental safety. The manufacturer must indicate in technical documentation that no chemical components harmful to human health were used in the production process;
Manufacturers are constantly improving production technologies and introducing know-how, solving the problem of how to make drywall one hundred percent moisture resistant. But so far, unfortunately, the moisture resistance of this type of finish does not exceed eighty-five percent;

Kitchen tiling

Important. Even if you trust trusted large manufacturers, it is advisable to additionally treat the cladding with water-repellent paint or a special water-resistant plaster mixture.

Is it possible to glue tiles to this type of finish? Of course yes. This will additionally protect the cladding from dampness and mold.

Has high strength and wear resistance;
The cladding is easy to install and can easily be done by hand;
The material makes it possible to create structures of various shapes;
The smooth surface allows you to decorate the finish with a variety of finishing materials;
Increases heat and sound insulation in the room;
Since this finishing material is able to “breathe,” this creates a favorable microclimate in the living space.

On our website you can see photo and video materials on the design of bathrooms, toilets and kitchens using moisture-resistant gypsum plasterboard, made in different stylistic decisions. We hope that viewing will help you make the right choice.

The construction market offers a variety of materials that can be used to finish various surfaces, as well as level them. Drywall is especially popular. Sheets of this material are quite versatile in use and have many advantages. Also among its varieties you can find moisture-resistant drywall. The characteristics of such material are worth considering in more detail.

Properties of drywall

The waterproof type of material has the same characteristics and physical properties same as regular gypsum board panels. The sheets have the same geometry, so you do not need to select special parts and profiles to install them. Thanks to this, plasterboard sheets can be installed using dry special technology.

The main advantages of covering various surfaces with plasterboard sheets are their light weight, ease of processing, high environmental friendliness and variety of design possibilities. Standard dimensions of the material make it easy to calculate the weight and price of the panels. The thickness of the sheets varies from 8 to 24 mm. The length can reach 4.8 m and the width - 1.3 m.

Before purchasing moisture-resistant drywall, you should understand its parameters in more detail. The material has the following physical characteristics:

Hue. The leaves are usually colored light green. Pink panels may also be sold. This is necessary to distinguish moisture-resistant drywall from regular drywall.
Gypsum layer. It contains special chemical substances, giving the material moisture-repellent properties. Each component of the material is completely safe for health.
Features of production. Moisture-resistant plasterboard is manufactured according to special technology, which eliminates the development of fungi and mold on the material. Thanks to this property, drywall can be used in basements where there is high humidity.
Fire resistance. The moisture-resistant material perfectly protects surfaces not only from water, but also from fire.

The dimensions of drywall are selected depending on the purpose of use. You can order sheets of different lengths, but having the same thickness. The minimum value is 7 mm, the maximum is 24 mm. For example, moisture-resistant plasterboard produced by the Knauf company has a thickness of 12 mm. It is installed both in the bathroom and kitchen, as well as in other unheated rooms.

Due to the high flexibility of the hydrophobic material, various shaped elements can be easily created. It will not break even if the panel is bent strongly enough. Thanks to these properties, moisture-resistant gypsum board has gained wide popularity.

Appearance and selection of sheets

Among gypsum plasterboard systems, materials produced by Knauf are especially popular. Despite the fact that moisture-resistant drywall perfectly protects surfaces from moisture, it itself requires additional waterproofing. However, compared to conventional drywall, it will last much longer in areas such as the bathroom.

How to determine the differences between sheets placed on the shelves of a hardware store in order to choose the most suitable material? Most sheets have standard dimensions and can be designated by an abbreviation:

GKLV;
KGLO.

The final letters “B” and “O” indicate moisture resistance and fire resistance, respectively. Drywall usually has a different color on each side. One is distinguished by a brown tint, and the second by green.

Moisture-resistant sheets are impregnated with antifungal and water-resistant compounds. This ensures the safety of the material in conditions of high humidity. Such additives can increase the service life of the material. Also, moisture-resistant drywall weighs about 3 kg more than a regular sheet.

The inner side of the panels is attached directly to the sheathing or directly to the walls of the bathroom, kitchen and toilet. External side sheets need to be protected special primer or water-repellent paint. Also, polyvinyl chloride or ceramic tiles, laid on top. Moisture-proof films are successfully used.

Terms of Use

Each panel has profiles on the edges. This allows you to seal the joints between sheets using different materials.

The edges can have the following profiles:

rectangular - in this case, sealing of joints is not provided;
step contour- intended for reinforcement tape and gypsum putty;
rounded - the joints are sealed with putty without the use of reinforced tape.

When laying the panels, you should make sure that the chamfered part is on the outside. For standard sheets it is lighter. The same rule applies to moisture-resistant drywall. Such material can be used for the same purposes as regular material, but in reverse order this condition does not work.

The cost of moisture-resistant drywall is slightly higher than regular drywall. It is also purchased only for use in certain conditions. For these reasons, it is not advisable to buy moisture-resistant material to decorate rooms for which ordinary material is quite suitable. It is worth paying attention to the proper ventilation of the room. It is necessary for the full release of moisture that has been accumulated by plasterboard sheets.

Obviously, moisture-resistant drywall can be used for most types of finishing work. It is laid on the ceiling and walls, as well as on prefabricated partitions. The universal material is characterized by increased practicality and excellent appearance.

Application area

Due to the many positive characteristics of the material, it can be used for finishing suspended ceilings and wall repairs. Drywall also serves the purpose of leveling wall surfaces.

In addition, moisture-resistant material can be used as a passive measure to protect against the spread of fire. Such sheets are used for internal and external works. Moisture-resistant panels can also be washed. If you have a choice between ordinary and moisture-resistant sheets for finishing the kitchen, you should pay attention to the second option. The cost of materials will vary, but in terms of service life, moisture-resistant drywall is significantly superior to its simple “brother.”

Laying methods

Installation of plasterboard sheets can be done in several ways. Frame - it is followed when the walls have many irregularities. In this case, the drywall is mounted on a pre-made metal sheathing. The latter is created from galvanized profiles. Fasten the frame to the wall with dowels or self-tapping screws.

Important! Moisture-resistant plasterboard should not be laid on wood sheathing if it must be used in a damp room.

To perform the sheathing, you can use metallic profile these sizes:

W- large profile, which is used to create a common wall frame;
D - it is used for interior work.

Guides are produced U-shaped. They have a smooth surface. Also, to install drywall you will need a support profile, which is distinguished by the presence of ribbed walls.

In order to level the walls, you can use the second method of attaching sheets of moisture-resistant drywall - with glue. This method is more simple and high speed installation When choosing this method, an adhesive mixture is simply applied to sheets of material, and then the plate is pressed tightly against the wall.

If the walls have unevenness less than 4 mm, the plasterboard can be fixed using putty. For large depressions or protrusions, it is necessary to use Perlfix glue.

Stages of work execution

When choosing a frame method, it is necessary to perform several successive steps. On each of them you need to pay attention Special attention correctness of work. Frame method Installation of drywall is carried out in this way:

Markings are applied for each part of the frame.
A sealing tape must be glued to the guide profile adjacent to the ceiling surface.
Secure the guides using self-tapping screws. Fastening is carried out in increments of 10 cm.
Using a plumb line, it is necessary to mark the racks. It is also worth considering that they are placed 60 cm from each other. The racks are fastened with rivets.
Humo-insulating material is placed in the cavity of the frame. Also at this stage, electrical wiring is carried out - it must be placed in a corrugated pipe.
All communications are securely secured.
It is worthwhile to provide holes in the drywall for switches and sockets. After this, each panel is pressed tightly against the frame and secured with self-tapping screws 25 mm long. A distance of 25 cm must be left between them.
The seams are sealed with putty, and then the entire surface is treated with a moisture-resistant primer.

After this, the installation of sockets and switches is carried out. Now you can apply paint or lay tiles to the surface.

When attaching drywall to glue, you should also follow a certain sequence:

Clean the base, remove the old finish. Determine the presence of irregularities.
Large tubercles are knocked down using a puncher.
After this, the wall is marked.
A primer is applied to the surface for better adhesion to the finishing material.
Cut out sheets of drywall in accordance with the locations of sockets and switches. The canvases are cut so that approximately 10 mm remains between the sheathing and the floor. This gap is made to provide air access to the glue. After finishing the work, it is sealed with sealant.
Sheets of plasterboard are laid on wooden slats.
Glue is applied in small slides. Their diameter should be approximately 100 mm and height 25 mm. A distance of 20-30 cm should be left between the slides.
To control the height of the lower gap, wooden wedges must be attached to the wall from below.
A sheet of moisture-resistant plasterboard must be applied to the wall, level the sheet along the plane, and then horizontally and vertically. Finishing starts from the corner.

Advice! Before installation, the panels must be left in the room where finishing will be carried out for at least two days. This is necessary so that the sheets do not become deformed.

After the work is completed, the glue should be allowed to dry completely. The seams must be taped with reinforcing tape and then puttied. Wedges are removed from the bottom gap, and the space is filled with silicone or acrylic sealant.

Materials for apartment renovation

In this review we will talk about moisture-resistant drywall, its main properties and areas of use. We will provide you with a complete list of selection criteria and features of waterproof plasterboard.
So, at the moment, from a wide range of building materials that make it possible to carry out finishing work and easy leveling of surfaces, we can highlight plasterboard sheets, which in their model range, along with the standard one, also have moisture-resistant plasterboard.

Properties of moisture-resistant drywall

Such systems, along with the gypsum board panels themselves, also have all the required parts for the speedy installation of a supporting profile, all possible geometries, making it possible to special labor perform the entire cycle of dry special cladding technology, without carrying out work in rooms with high humidity. A panel of high-quality gypsum, framed on both sides with strong cardboard, made a splash in the repair and construction cladding industry.

The main advantages include maximum environmental friendliness, low weight, and easy processing. GCR concepts enable specialists to actually implement the most incredible architectural and design structures. High-quality building material - moisture-resistant plasterboard, has standard dimensions. This makes it possible, even during the creation of the project, to easily determine the number of panels, their total weight, price, etc.

Having a couple of main standard dimensions, the thickness of the manufactured panels can range from eight to twenty-four millimeters. Typically, the length varies from two and a half to almost five (4.8) meters, combined with a width of 1.2-1.3 m. In addition, the dimensions of the panels can be changed according to the buyer’s order.

Choosing waterproof drywall

Among a wide range of gypsum plasterboard systems, products manufactured by KNAUF are especially popular. The base of incredible variety contains simple, quickly installed frame parts and special characteristics. Thus, gypsum plasterboard is capable of taking on incredible geometry, bending when exposed to moisture, creating, etc.

Drywall is hygroscopic. This property can be attributed both to its pros and cons, since it limits the use of standard plasterboard. Therefore, for rooms with high humidity, moisture-resistant plasterboard panels are produced. Of course, they also need auxiliary hydro- and moisture insulation. However, you can safely use moisture-resistant plasterboard for the bathroom, where in comparison with it, standard plasterboard will not last long.

How to find out the main differences between panel types? The sheets produced most often have standard characteristics and are marked with the abbreviations GKL, GKLV, GKLO (O - fire-resistant and V - moisture-resistant). If they have the dimensions described above, standard gypsum boards usually have one side in a natural paper shade, and the other in a coffee color.

Moisture-resistant plasterboard sheets stand out for their green color color scheme and characteristics, since the structure of the panels is treated with moisture-resistant, anti-fungal and impregnated solutions, which increase the degree of stability when using the material in a humid environment. Similar ingredients introduced into moisture-resistant drywall, practically do not increase its mass. A regular size panel weighs about 2-3 kg more than a standard gypsum board.

Having already decided how you will install moisture-resistant drywall, the properties of which make it possible to use it in the bathroom, you need to remember the need to protect its outer edge. In such a case, specialized water-repellent paints and varnishes And . Lined gypsum boards also work well ceramic tiles, in addition, you can use waterproof films, etc.

Criteria and areas of use of moisture-resistant drywall

In progress construction work The question usually arises as to which side to mount such drywall. All panels have edges, they can have different shapes. This design is made specifically for good sealing of interpanel joints with all kinds of building materials.

The edges can have a rectangular contour (in this case no sealing is done), a stepped shape (the joint is puttied using a reinforcing strip), or a rounded edge profile (puttyed without using a strip).

When installing panels, the chamfered side must be on the outside. For regular panel The outer surface is most often a lighter surface. An identical rule applies to GKLV. In principle, moisture-resistant drywall can be used in the same way as standard drywall, but this rule does not apply on the contrary.

By the way, its price is naturally higher and it is bought for a special application; therefore, it is hardly reasonable to use moisture-resistant drywall in those places where a standard one would be sufficient. For a long service life, manufacturers recommend using moisture-resistant gypsum plasterboard in rooms with sufficient ventilation, which allows the panel to remove accumulated water.

Naturally, moisture-resistant drywall, the properties of which belong to full list Such excellent facing building materials can be used in all kinds of internal repair and cladding work: for wall surfaces, creating various internal partitions, etc.

IN modern construction A wide variety of materials are used, and drywall occupies a special place on the list. It is used in finishing works and creating partitions.

When choosing a material, you should pay attention to moisture-resistant plasterboard. This option is quite often used in repair work, which is due to its high performance qualities.

Features of the material

To understand the question - how does the moisture-resistant version differ from the usual one - you first need to familiarize yourself with the features of the material. This type is widely used in finishing works, and is used for rooms with high level humidity.

Regular drywall is an equally popular option, and in addition, it has a low cost. But the material is used only in those rooms where there is a normal microclimate.

As for moisture-resistant drywall, it is somewhat superior to the conventional version in terms of technical characteristics. Here are some features of this material:

not afraid of temperature changes;
is resistant to external influences;
Special additives are used to prevent the appearance of mold and mildew.

To create moisture-resistant drywall, reinforcing substances are used, and the layers are treated with protective agents. This manufacturing technology allows us to obtain high-quality and durable material.

In terms of size, moisture-resistant drywall is no different from the usual type. In the manufacture of the material, established standards are used, from which manufacturers try not to deviate.

Differences between moisture-resistant drywall

Moisture-resistant drywall is somewhat different from the usual version. The difference lies not only in characteristics, but also in appearance.

So, to the main ones distinctive features relate:

moisture-resistant material has a gray or greenish tint (some manufacturers produce pink sheets);
the surface of the drywall is treated with special water-repellent agents;
high resistance to moisture.

Also, the difference lies in the manufacturing technology. The basis of a regular sheet is gypsum, which is pasted over with cardboard.

The moisture-resistant material has additives, which increases its performance properties. The base contains hydrophobic substances. And they make moisture-resistant drywall like this:

Drywall is a durable and easy-to-use material that can also be used in wet areas. What features does moisture-resistant drywall have?

Technical characteristics of moisture-resistant plasterboard

A standard plasterboard sheet consists of three layers - a layer of gypsum is located in the core, and sheets of durable cardboard cover it on top and bottom. Gypsum is a material prone to crumbling, so cardboard protects it from mechanical destruction.

Looking for green color

It is not difficult to distinguish the moisture-resistant version of plasterboard boards - according to the accepted standard, they are made in green color, so that there is less chance of confusion.

However, both of these materials have low resistance to moisture. Therefore, for a long time, gypsum plasterboard was used only in rooms with normal humidity. With its help they performed internal partitions and ceilings, strengthened floors and walls. It was believed that it was pointless to use drywall in the kitchen, and especially in the bathroom, since constant contact with moist air and steam would quickly deteriorate the material.

All this really applies to regular drywall. But on the construction market there is also a moisture-resistant variety, also called GKLV. In its structure, this material is almost identical to the standard one - however, both the gypsum layer and two cardboard sheets are treated with special moisture-resistant impregnations that improve performance characteristics GKL.

What are the technical characteristics of moisture-resistant plasterboard?

Material resistance high humidity 90% higher than conventional drywall.
Sheet thickness can range from 6.5 millimeters to 24 millimeters.
A standard sheet of moisture-resistant plasterboard in length and width ranges from 600 by 2000 millimeters to 1200 by 4000 millimeters.
Moisture-resistant gypsum plasterboard is quite resistant to fire - such drywall belongs to group G1, ignites slowly, does not form large quantity smoke and emits few toxic substances.
The material is suitable for both dry and wet cleaning.

It is very easy to distinguish a moisture-resistant type of gypsum plasterboard from a regular one. Firstly, there is always appropriate marking on the packaging, explaining in what conditions the gypsum board sheet can be used. And secondly, moisture-resistant material almost always has a green or light green surface color - whereas ordinary drywall is gray.

Where can GKLV be used?

What is the main advantage of moisture-resistant plasterboard sheet? Of course, the scope of its application is expanding significantly. This material can be used for almost any purpose - without regard to the level of humidity in the room.

GKLV is used for ordinary work - making walls and partitions, creating multi-level ceilings. Thanks to it, the design possibilities for the kitchen expand - here you can also make a ceiling with height differences, without fear that the main material will become unusable from damp fumes.

And of course, Moisture-resistant plasterboard remains especially in demand in bathrooms. Ceilings are made from it, walls are sheathed with it, and gypsum board is used in small jobs - for example, when creating a closed niche under a bathtub. GKLV's resistance to water makes it a durable and inexpensive option.

But of course, we must not forget about one thing important point. Even moisture-resistant drywall cannot show the same resistance to water as, say, tile. In direct contact with moisture, it will still deteriorate - albeit very slowly.

In order to keep the material in good condition, it must be additionally protected from moisture. For example, drywall can be painted with moisture-resistant paint, closed vinyl wallpaper or plastic panels. You should also ventilate the kitchen and bathroom more often and monitor the quality operation of the exhaust system.

Drywall Knauf - brand features

There are many brands on the construction market that produce moisture-resistant drywall. The production technology is always approximately the same - but of course, gypsum board sheets from different manufacturers may vary in quality. Practical resistance to moisture depends on many aspects - on the quality of raw materials, on compliance with all rules during manufacturing, on the moisture-resistant impregnations used.

The greatest demand in Russia is GKLV from the German company Knauf. KNAUF plasterboard has some features that set it apart from its competitors.

The material retains all its properties at humidity levels up to 90%.
The gypsum core and cardboard layers are treated with high-quality hydrophobic impregnations.
Drywall is resistant to mechanical stress - there is no fear of damaging it with an accidental blow.
GKLV easily tolerates accidental direct exposure to moisture.
Knauf products are environmentally friendly materials, the manufacture of which does not use toxic chemicals. In particular, natural starch plays the role of a binding composition here.
Moisture-resistant material from a German manufacturer has good fire-resistant properties. Such drywall does not burn at all, but only chars when exposed to high temperatures for a long time.

The Knauf company produces plasterboard sheets of all common dimensions, so for any purpose you can find a suitable material among the product line. If necessary, Knauf can be easily processed and brought to the desired size.

Knauf is a quality proven over the years. It is also worth noting that the German company produces many other building materials that combine perfectly with each other. Thus, if during repair you use, for example, adhesive compositions from Knauf, it would be wise to choose drywall from this brand - there is no doubt that when working, the two materials will fit together and will not complicate the repair.

Cost of moisture-resistant drywall

How much does moisture-resistant drywall cost? Its price is quite low - about 200 - 250 rubles per sheet.

Of course, when carrying out repairs, quite a lot of material will be required. To understand exactly how much it will cost to buy drywall, you need to measure the dimensions of the room and calculate how many sheets will be needed for the job. Also keep in mind that some amount of material will inevitably be damaged - even experienced repairmen make mistakes. As a rule, it is customary to buy materials with a reserve of approximately 10 - 15% - this way you get a guarantee that even with a significant amount of defective drywall there will be enough for all the planned work.