Behind last years Finishing material such as plasterboard has gained a leading position in the construction market. He became practically irreplaceable material, without which not a single modern renovation is done today.

At the same time, many people have encountered a situation where, after repairs in ordinary rooms there was quite a lot of material left that could be used in small rooms. For example, in the kitchen or bathroom. But there is a slight hitch here. Ordinary drywall is not suitable for finishing these rooms due to their specific microclimate (high humidity and temperature fluctuations). Therefore, many are interested in the possibility of converting ordinary drywall sheets into a moisture-resistant type. This article will tell you whether this can be done.

Today, manufacturers of building materials do not stand still and are constantly improving their products. Thanks to this, drywall on the market is represented by four main variations:

• ordinary;
• moisture resistant;
• refractory;
• moisture-resistant.

The cheapest and most popular material are standard sheets, which can be installed in rooms with a normal microclimate.
Those. Such sheets can be installed in almost any room of the apartment: bedroom, living room, corridor, children’s room, etc. The second most popular and consumer value is moisture-resistant drywall. But it costs a little more than ordinary material

with standard properties. But such sheets can be installed in rooms with a special microclimate: kitchen, toilet, bathroom, loggia or balcony.

Moisture resistant material Therefore, it is quite reasonable that the question arises in people’s minds as to whether it is possible to make moisture-resistant material on their own and at home. This question is especially relevant in a situation where, after finishing the room, you have enough ordinary gypsum boards left, which can be more than enough for small kitchen
or bathroom. Basically, with the development of modern building materials possible, since standard sheets are the basis for creating the other three types. The only difference is in the properties of the final product. The main thing here is to clearly understand what the differences are between moisture-resistant and ordinary drywall.

Features of the material

For rooms with high humidity and constant temperature changes, a relatively small number of materials are suitable as finishing materials. One such material is moisture-resistant drywall. It is able to effectively withstand the negative influences of the microclimate, without reducing its service life, as well as its quality.
Moisture-resistant drywall is produced by adding special additives to its gypsum core that prevent the development of mold and fungi in the material. Typically these are silicone additives. In addition, the gypsum core contains additional reinforcing substances.

Leaf structure

At the same time, the cardboard layers that protect the gypsum core are also processed by special means. But, even despite such preventive measures, to improve the performance properties of the material, experts recommend additionally covering it with ceramic tiles or something similar. In such a situation, your repair will become almost eternal.
Note! When laying ceramic tiles on the surface of plasterboard, special surface preparation is required (priming and additional waterproofing).
As you can see, you are unlikely to be able to make a moisture-resistant material with your own hands with properties as close as possible to the original. But it is still possible to increase its moisture resistance to a certain level. To do this, you need to know not only the features of the sheet, but also its characteristics in order to choose the right means for “transformation”.

Sheet characteristics

All sheets of plasterboard of various properties have certain characteristics, which actually make them different from each other. The moisture-resistant type of material has the following characteristics:

• color – green or gray with a greenish tint. Although sometimes some manufacturers make it pink, but with a special note about its moisture resistance;
• the types of edges are similar to other variations of this product;

Edge Types

• resistance to moisture – high;
• the main parameters of the sheet (length, width and height) are similar to standard sizes;
• cardboard layers are treated with special antifungal and water-repellent compounds.

Note! The composition that is used by various manufacturers to give the material better water-repellent properties differs. This is a secret of the technological process and is not disclosed by the manufacturers.

Thus, what makes a sheet of drywall moisture-repellent does not, in fact, change the production technology. Therefore, in the presence of special moisture-repellent agents, regular drywall It can also be made more resistant to the negative effects of moisture. After all, without such a modification, an ordinary gypsum board sheet will not be able to withstand moisture for a long time and will swell quite quickly with all the ensuing consequences.
However, it is worth remembering that a homemade sheet will be inferior in quality to moisture-resistant drywall, which was produced by the manufacturer according to all technological rules.

The quality of such products is guaranteed by a certificate, which indicates the GOST used for the production of plasterboard.

Necessary materials and work result

To make a moisture-resistant version from ordinary drywall, you will need the following tools:

• Primer
• primer. It must penetrate deeply into the leaf to create an excellent protective layer;
• antifungal and anti-mold solutions;

water-repellent paint. It is necessary in a situation where the sheet will not be externally protected by ceramic tiles.

• In addition to materials, you should stock up on several types of painting supplies. It can be:
• brushes of different sizes;

rollers of different sizes.
With this set of tools and materials, you will be able to increase the moisture-repellent properties of a simple gypsum board sheet. Remember that no matter how much effort and time you spend, the end result of this procedure will still be inferior finished products . Therefore, if there is a need for finishing large spaces , or the room has enough high humidity
(bathroom), you should correctly assess how rational such savings are. Indeed, in some situations, your repair, due to insufficient properties of the material, may last much less time than you expected.
Moisture-resistant sheets should be made from standard sheets only if there is an urgent need for this and it is impossible to purchase a ready-made product.

• Reasons for such actions may include:
• small finishing volumes moisture-resistant boards. For example, in this way you can create a box that masks communications means (sewer and water pipes, gas pipes, ventilation and pipe connecting the hood to the ventilation hole);

Camouflage box

• small dimensions of the room that needs to be finished;
• the desire to save on purchasing new finishing materials and the availability of a source code for modification.

In all other cases, more practical solution will be the purchase of high-quality products that definitely have all the necessary properties.

Rework process

The process of modifying a regular sheet into a moisture-resistant one occurs as follows:

Applying primer

• choose a good deep penetration primer;
• Place the sheet on a flat surface. The best solution will put it on the table;
• Using a brush or roller, apply a layer of primer evenly over the entire surface of the slab;
• let the solution dry thoroughly. To do this, you can open the windows in the room to improve the aeration of the room;

Note! For a greater protective effect, the primer should be applied in several layers. Three or four times will be enough.

• then, when a sufficient protective layer has been created on one side, we repeat a similar procedure for the other side. As a result, the sheet acquires good waterproofing properties;
• Next, we treat the dried slab in several layers with antifungal and anti-mold solutions.

After drying, the sheet will acquire required properties and will be able to better withstand the effects of high humidity. This procedure is called “impregnated impregnation”.
As a result of the described manipulations, drywall acquires dispersion properties, according to which moisture remains inside the material and it does not penetrate there from the outside.
Ultimately, such a sheet can be coated with oil or water-repellent paint, which will give you even more best result. As you can see, everything is extremely simple, the main thing is to proceed from the questions of the expediency and rationality of such a process.

The construction market offers a variety of materials that can be used for finishing various surfaces, as well as their alignment. 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 diversity 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 drywall is manufactured using a special technology that 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. 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 must be protected with a 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 this condition does not work in reverse.

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 device proper ventilation premises. 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

Thanks to many positive characteristics The material can be used for finishing suspended ceilings and repairing walls. 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. These sheets are used for interior and exterior work. 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 lathing, you can use a metal profile of the following dimensions:

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

The guides are made in a U-shape. 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 characterized by greater simplicity and high installation speed. 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. At large sizes For depressions or protrusions, Perlfix glue must be used.

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.

Technologies for the production of building materials are constantly being improved. Manufacturers try to take into account all market needs, external and internal lining acquire 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. How does moisture-resistant drywall differ from conventional plasterboard, and what new properties and characteristics has it acquired?

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 forming a flat continuous strip 1200 millimeters wide and different 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.

Related articles:

Material markings and dimensions

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 pink. 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– a finishing material resistant to high humidity, with increased resistance to open flame.

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 may have following sizes- 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.

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 finishing materials of various sizes, so you can always choose the ones you need.

GKL edge type

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 of 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

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;

Important. Even trusting verified large manufacturers It is advisable to additionally treat the cladding with water-repellent paint or a special waterproof 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 with your own hands;
• 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 board, made in different stylistic solutions. We hope that viewing will help you make the right choice.

A large number of different buildings have a very unstable microclimate, for example, constant temperature changes or high humidity, which means that for their finishing it is necessary to select special materials that will withstand adverse conditions. Such a material is moisture-resistant plasterboard - this is a more modern analogue of standard plasterboard, which has a low cost, excellent quality, and is very popular among professional craftsmen. Its distinctive characteristic is that it can be used to decorate absolutely any premises.

Modern moisture-resistant drywall is installed not only in living rooms, in the kitchen, but also in the bathroom, in the bathhouse or on the balcony, which can significantly reduce repair time and its cost.

How are moisture-resistant sheets different from regular sheets?

Waterproof drywall has several distinctive characteristics by which it can be distinguished from standard samples:

1. Color of the product - as for color, everything is simple: gypsum board has a noticeable greenish tint, from which the cardboard layer is made, and a simple plasterboard sheet is different gray shades cardboard layer.
2. Product weight - due to the fact that the moisture-resistant version has additional elements (designed to create a water-repellent surface), which significantly increase the weight of the entire structure, they weigh about 2 kg heavier than conventional sheets, which is their striking distinctive feature.
3. Explanation of the marking - here you need to know that simple drywall is labeled as gypsum board, and its moisture-resistant version is labeled as gypsum board.
4. Dimensions of moisture-resistant drywall - at this point it is necessary to note its length, thickness and width. As for the length of the slab, it ranges from 2500 to 4800 mm, and the width can reach from 1200 to 1300 mm. If products with other sizes are needed for repairs, they can be made to order. All standard samples are created with dimensions of 9x12.5 mm - this thickness is the norm.
5. The degree of processing of drywall - the difference between a moisture-resistant product and a regular one is that it is coated with special compounds that protect the surface of the sheet from excess moisture, fungi and mold.
6. Price of the product - as for the price, GKLV is more expensive due to additional elements in the composition. All its other technical features are fully consistent with ordinary drywall.

Moisture resistant sheet certification

GKLV is excellent for finishing walls in rooms with a poor, unstable microclimate, because it has a gypsum layer impregnated special composition, which helps repel moisture, which allows it to be used in work related to wet areas. At the same time, the material bends well, so experienced craftsmen use it to create figured elements.

A certificate is an official document that confirms the quality of the products sold; it distinguishes the manufacturer from the mass of competitors whose quality has not been confirmed.

The certificate must have a mark stating that the material is fire resistant (fire certification is required) and is completely safe for humans and environment, it would also be useful to note the storage features; basement-type premises are perfect for this.

Moisture-resistant drywall - what are the properties and advantages?

The properties of GKLV include the following:

• high-quality sheets are green, less often pink;
• the marking must be highlighted in blue on the back of the product;
• since the material can be used both as a main material and as a finishing (decorative) material, here you need to decide on its thickness. So, you can choose either thin sheets (from 6.5 mm) or, on the contrary, thick ones (up to 24 mm);
• available individual order products with the required dimensions (if non-standard sheets are needed);
• in order for the material to retain all its beneficial properties for as long as possible, it must be treated (during the creation process) with special substances that rid the surface of mold, various fungi and excess moisture;
• GKL sheets can belong to different classes, for example, class “A” indicates that the products are moisture-resistant, and class “B” is more suitable for lower priority work.

Also, moisture-resistant drywall has several advantages, which attracts experienced craftsmen and specialists:

• high levels of water repellency and fire resistance;
• good flexibility and ductility, which allows you to create structures of different shapes;
• reasonable prices;
• non-toxic and safe;
• multifunctionality and versatility;
• creates, provides and maintains the desired microclimate of the room;
• the material is very convenient and easy to install and assemble, which allows you to work alone without involving strangers in the work;
• moisture resistant plasterboard has excellent sound insulation properties;
• Any component or paint for finishing or decoration is good for this material.

Application of moisture-resistant boards

Moisture-resistant plasterboard is intended for residential as well as non-residential premises, no matter whether they are heated or not. Moreover, they may have high humidity. Such buildings include the following objects: bathrooms and toilet rooms, bathrooms, baths and saunas, changing rooms, which are combined with showers, balconies and kitchens, attics and attics, this also includes swimming pools (with tiled finishing), barns and garages , as well as apartment rooms that are located on the north side, where the sun's rays rarely reach.

In addition to residential heated premises, it is appropriate to use the slabs in unheated garages, barns or unglazed balconies. For achievement maximum effect you can glue the tiles, the whole procedure is quite simple, so anyone can easily handle it.

In order for the sheets to serve for a long time, when installing them you need to pay attention to the following tips:

1. Before finishing the room with gypsum boards, it is imperative to inspect the room for the presence of ventilation (in its absence, slabs cannot be used); it is worth noting that in bathrooms there must be another ventilation in addition to natural. This will create the necessary air circulation, which will prevent all surfaces from condensation.
2. For creating additional protection, all moisture-resistant sheets on the front side are subject to special treatment with hydrophobic impregnations and antifungal sprays.
3. If the room is exposed to strong moisture, then experts recommend using an additional layer of slabs; they will protect the surfaces and extend the service life.
4. To create original decor you can use mosaics, tiles, various colors and wallpaper, with their help you can bring to life any design solution.
5. To fill voids in frame system It is recommended to use a hydrophobic insulator; it will provide protection from water, excess noise and sounds, as well as large and rapid heat loss.

How to choose waterproof drywall?

To make the right choice quality materials that will last for a long time, you should follow a few tips:

source: //izgipsokartona.com/o-materiale/vlagostojkij-gipsokarton.html

Gypsum plasterboard (GKL) is a multi-purpose material designed to solve construction and finishing problems. It is used when installing functional and decorative partitions, leveling and cladding walls, making suspended ceilings, and decorating interior elements. However, ordinary drywall has one significant drawback - the structure collapses over time in conditions of high humidity. To solve this problem, waterproof plasterboard is used, which differs from the usual one in composition and technological characteristics.

Internal structure

The core, made from gypsum dough, is lined with cardboard on both sides using glue, leaving only the end parts of the product open. The strength of gypsum boards is ensured by binding components, added to the plaster, and the function of the reinforcing frame is taken over by cardboard, which serves as the basis for finishing materials - plaster, paint, wallpaper, facing tiles.

Bathroom cladding using gypsum boards

Unlike usual moisture resistant plasterboard during production passes special treatment, which increases the product’s resistance to moisture. In its manufacture, impregnated cardboard is used, and antifungal and hydrophobic additives are introduced into the gypsum core. As a result of this treatment, moisture-resistant plasterboard absorbs no more than 10% moisture over a conventional period of time compared to standard drywall. It does not swell, does not increase in volume, and drops are allowed to fall on the surface. It is washed if necessary. It is convenient to work with it when creating concave or convex structures.

A more expensive alternative to drywall is gypsum fiber sheet (GVL). This is a homogeneous finishing material without a cardboard shell and with increased density, which, compared to conventional gypsum board, does not crumble when cut. Craftsmen use it when leveling walls, making “dry” screeds, as well as when creating structures subject to shock or other mechanical loads.

Marking - how to decipher the designations

When purchasing drywall products, carefully study the labeling. It is applied from the back and begins with abbreviations indicating the type of plasterboard and its edges. Next comes the size, release date (not on all products), information about compliance with the standard.

Three types of plasterboard sheets:

• GKL is a standard plasterboard material used for cladding rooms with normal or low humidity.
• GKLV- moisture-resistant plasterboard, intended for rooms with normal or high humidity.
• GKLO is a fire-resistant plasterboard, which is recommended for use in rooms with increased fire safety requirements.

The photo below shows the marking of a moisture-resistant plasterboard board, where:

• GKLV means moisture-resistant plasterboard sheet;
• UK - thinned edge (another name is “boat”);
• 12.5×1200×2500 - sheet dimensions;
• GOST 6266-97 - interstate product standard.

An example of marking a plasterboard sheet

Also, these products, in accordance with the accepted standard, are divided into two categories - A and B, depending on the number of permissible defects per certain size. A class A product is considered to be of higher quality, as it has fewer defects on its surface, which ensures a better quality putty.

The three main types of gypsum boards are distinguished by the color of the cardboard. Although manufacturers do not have strictly accepted standards, ordinary plasterboard slabs are gray or pale beige in color, moisture-resistant ones are produced in green (or pale blue), and fire-resistant ones are produced in pink.

Color designations of the main types of gypsum boards

Dimensions, thickness, weight

The sizes of moisture-resistant gypsum board sheets on the market range from 600 to 1200 mm in width and from 2000 to 4000 mm in length. The dimensions of the common standard are 1200×2500 mm. At the same time, manufacturers meet customers halfway and are ready to accept orders for the production of plasterboard slabs of non-standard sizes.

When calculating the area to be treated, they are guided by the fact that during installation building structures It is better to cut off the excess length than to add missing pieces of material to a shorter sheet. This reduces the number of butt seams and additional profiles. When purchasing plasterboard panels, craftsmen recommend purchasing several pieces (depending on the volume of planned work) in reserve.

The thickness of the product is determined by its intended purpose. The thinnest drywall is arched. Its thickness is 6.5 mm, ceiling - 9.5 mm, wall - 12.5 mm. Standard thickness moisture resistant material ranges from 9.5 to 12.5 mm. In reinforced slabs of moisture-resistant fire-resistant plasterboard of increased strength, this parameter is in the range from 15 to 24 millimeters.

The weight of a plasterboard board directly depends on the size and thickness of the product. Weight at standard size 1200×2500 mm with an area of ​​3 sq.m and a thickness of 9.5 mm is 24-25 kg, and a product measuring 1200×2500 mm with a thickness of 12.5 mm weighs approximately 30 kg. Moisture-resistant plasterboard due to the additives it contains is heavier than the standard one with the same sheet sizes.

Bathroom design made using gypsum boards

Edge Types

Another characteristic is the type of end edge, on which strength depends, as well as the method of processing sheet joints.

Five types of edges:

• PC marking means a straight edge with an angle of 90°. Sheets with such an edge are used for installation that does not require sealing joints. So, when sheathing in several layers, internal slabs are used with this type of edge.
• For a rounded edge (ZK), or semicircular on the front side (PLC), only putty is enough.
• When working with a thinned edge (UK), semicircular and thinned on the front side (PLUC), additional gluing of the joints with reinforcing tape is required, followed by puttying.

Craftsmen prefer slabs with beveled edges UK and PLUK, which provide the best seam strength and the absence of unwanted protrusions on the surface.

Types of plasterboard edges

Advantages and disadvantages

The undeniable advantages of moisture-resistant plasterboard include its safety for health. It does not contain toxic substances, and the acidity level is similar to the acidity of human skin, and is absolutely harmless from an environmental point of view. This material easily absorbs and releases moisture, maintaining a stable level in the room.

The following video demonstrates the process of installing plasterboard boards in a bathroom according to the author’s design:

At the same time, moisture-resistant drywall is not susceptible to the formation of fungi on its surface, which ensures long term services while maintaining the original appearance.

Like other types of gypsum board, it is lightweight, easy to use, affordable and does not require any special care. And in addition to sound and heat insulation properties, it boasts ease of working with various finishing materials.

But it is worth considering some disadvantages. This material is not very durable; it is not suitable for attaching heavy cabinets and shelves to it. Mechanical damage causes dents or holes to form. If the waterproofing layer is damaged, it loses its performance characteristics. In addition, any drywall takes up part of the usable area.

Of all types of drywall, it is moisture-resistant that copes well with the widest range of construction tasks and is popular with consumers.

source: //gipsohouse.ru/typesof/moistureresistant/5065-gkl-vlagostojkij.html

Plaster for external and internal work

Plastering work involves applying a special protective and finishing mixture to the ceiling and walls.

Currently in construction stores Various types of plaster are sold for internal as well as external finishing work.

We will tell you in more detail about the varieties of this material and how to use it.

Types of plaster

Assortment of plaster choices

In stores you can find dozens various types such finishing. How to choose the right material, and how to save money on its purchase?

If you have any difficulties in choosing, you can always consult the sales staff in the store, they will help you with your choice.

Depending on its purpose, it is customary to distinguish between ordinary, special and decorative plaster. Based on the purpose of the material, you should choose a specific type of finish.

Regular plaster is designed to protect the surface from moisture, as well as to level the walls. Subsequently, after applying the leveling composition, further finishing is expected, which can be done decorative bricks, stone slabs and other durable materials.

This will ensure maximum durability of the surface of the walls and façade of the building.

Special plaster, depending on its purpose, can be heat-saving, moisture-proof, X-ray-proof, sound-proof, and so on.

It must be said that these varieties are difficult to operate and require compliance with all technological processes, standards for layer thickness and chemical composition of the material.

Decorative plaster appeared on the market relatively recently and today is actively used when carrying out repair work.

The use of this material, the use of various application techniques followed by processing allows you to create attractive and original repairs premises.

Depending on the scope of use, plaster can be divided into material for external and internal use.

For example, popular today gypsum mixtures Designed for indoor use with natural humidity levels. Whereas cement-sand based mortars are versatile and can be used with equal success for external and internal work.

Finishing material for interior work

Lime mortars

Lime and gypsum mixtures, as well as magnesium plasters, are widely used when performing interior finishing work.

Each of these varieties has certain advantages and disadvantages. Lime mortars are environmentally friendly, have a high speed of application, and have an affordable price.

The disadvantages of such plaster include its immediate strength indicators. This finish is prepared immediately before use and can be painted in different colors. Thanks to the use of textured rollers, you can give the walls the relief you need.

Gypsum plaster

Gypsum plaster is versatile and easy to use.

Possibility of coloring, as well as obtaining textured surface makes this option popular when performing designer renovations.

Their disadvantages include its not very high strength and low moisture resistance. The latter does not allow the use of this material for wall decoration in the kitchen and bathrooms.

Magnesia plasters are made from environmentally friendly pure materials, are distinguished by their strength and excellent durability. This material is not afraid of moisture, and also high temperatures. The disadvantage of finishing is its high cost, which significantly increases the homeowner's expenses.

Plaster for external use

Cement-sand plaster

Cement-sand mixtures are distinguished by excellent resistance to moisture, which allows them to be used for exterior finishing work.

This plaster is durable and resistant to ultraviolet radiation. The excellent strength of this material allows it to be used for finishing the base.

The plinth is plastered with the addition of hydrophobic additives, which allow the material to withstand prolonged exposure to high humidity. It must be said that with all its advantages, such cement-sand plaster has one significant drawback.

Working with this material is difficult, which forces you to turn to professional specialists when performing finishing work.

Using plaster for interior decoration

In construction stores you can find both ready-made plaster diluted in water and dry mixtures that require preparation before use.

Preparing the solution is not difficult, while the existing difference in cost, especially for large volumes of work, will allow you to save significantly. Leveling plaster is applied to the prepared surface.

The walls need to be cleared of old decoration, cover with concrete contact or primer. Only after this can you begin to apply the material and then level it.

When applying decorative plaster it is necessary to carry out finishing using rollers and other tools.

Plastering the facade and basement of the building

Plastering the facade of the house

Plastering the facade of a building allows you to give the building a neat, attractive appearance.

With the right choice of finishing material and compliance with all the technology, such finishing will be durable and durable.

The material is applied to a previously leveled, primed wall.

Leveling the surface can be done with a long rule and corners. We can recommend that when plastering the facade of a building, you use sprayers, which can significantly speed up the finishing work.

You can easily rent such equipment and finish the façade of your private home in the shortest possible time.

Basement plaster is made using hydrophobic additives and is characterized by increased strength. It is recommended to do the finishing manually, and the minimum thickness of the applied layer is 15 millimeters.

In the future, it is recommended to carry out additional finishing of the basement of the building with durable stone materials or brick. This will ensure maximum protection buildings from moisture, and the base itself will be reliably protected from mechanical damage.

Conclusion

Plaster is one of the most popular finishing materials today. If you choose the right type of material, you can easily use it for interior as well as exterior work.

Plastered walls have an attractive appearance, are strong and durable. The ease of finishing work allows you to carry out the work yourself, without resorting to the services of professional builders. All this will allow you to save money by reducing the cost of home renovations.

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Moisture-resistant drywall: 15 frequently asked questions

In this article I want to talk about the most popular building material, without which rough finishing or redevelopment of an apartment is rarely done - about moisture resistant plasterboard sheet. Dear reader, you will find out how it differs from regular gypsum plasterboard, how it is installed and how it is processed for final finishing.

So let's get started.

Our hero is moisture-resistant gypsum board.

First meeting

Definitions

1. So, GKLV - what is it??

Decoding GKLV literally means “ G ipso TO arton L ist IN Lagos-resistant." As you can easily guess from the name, the material is intended for finishing rooms with high level humidity - kitchens, bathrooms, toilets and showers.

1. How plasterboard GKLV different from usual?

There are several differences:

• Additives are added to the gypsum dough to reduce hygroscopicity (the ability of the material to absorb moisture);
• Among the functional additives there are also antiseptics that prevent the development of fungus and mold;
• Moisture-resistant kraft paper is used as a covering;
• The price of the sheet is 25 - 30% higher (as of September 2016, the approximate price ratio is 300 rubles per sheet of regular plasterboard versus 400 for moisture-resistant material);
• Finally, moisture-resistant sheets differ from ordinary ones in color: they are produced blue-green, sea green.

Curious: fire-resistant plasterboard, which differs from ordinary plasterboard in its ability long time Resist open fire, marked with red kraft paper.

1. How well does waterproof drywall withstand moisture??

It is resistant precisely to the high content of water vapor in the atmosphere. Prolonged direct contact with water will lead to damage to the sheet (although this will take noticeably longer than in the case of conventional plasterboard). It is also impossible to store the material in the open air.

1. What should be the storage conditions for moisture-resistant drywall??

Sheets are stored in a stack on a flat horizontal surface in a room with constant humidity. It is strictly forbidden to store any type of plasterboard in a vertical position: over time, it deforms under its own weight and retains deformation for a long time.

1. How does a moisture-resistant gypsum fiber sheet differ from plasterboard??

It’s easier to say how they are similar: the presence of hygroscopicity-reducing and antifungal additives in the gypsum dough. Otherwise, these are completely different materials:

• Moisture-resistant gypsum fiber board is a homogeneous material without an outer shell, reinforced with fluff cellulose;

• A moisture-resistant gypsum board is a gypsum core with fillers and modifying additives, covered on both sides with kraft paper (construction cardboard).

1. What other types of drywall are available on sale??

There are only four of them:

• Regular (gypsum plasterboard);
• Moisture resistant (GKLV);
• Already mentioned fire-resistant (GKLO);
• Fire and moisture resistant drywall (GKLVO).

Normative documents

1. By what standard is moisture-resistant plasterboard produced??

The main document regulating its production in Russian Federation— GOST 6266-97. For the convenience of the reader, I will present here the key requirements of the standard.

Factory sheet edges can be:

• Straight;

The photo shows material with straight (rectangular) edges.

• Rounded;
• Semicircular (rounding is only on the front side);
• Thinner (the thickness of the sheet towards the edge decreases by 0.8 - 2 millimeters, which makes it possible to hide the tape reinforcing the seam with putty);
• Refined with a curve on the front side.

Reference: most of the gypsum boards sold have PLUK type edges. They allow you to fill the seam between the factory edges with putty and, as I mentioned above, to mask the reinforcement.

The size of drywall can take the following values:

Reference: the most common size is 2500x1200x 12 5 mm. The thickness of moisture-resistant plasterboard of 12.5 millimeters provides strength sufficient for installation on a partition in one layer, with a quite acceptable sheet weight of 30 kg.

The sheet should have a rectangular shape. The maximum deviation is 3 mm for material of group A and 8 mm for sheets of group B.

In addition to smaller tolerances, group A is distinguished by more stringent requirements for the appearance of the sheet. It should not have visible damage to corners and edges. For comparison, a sheet of group B may have the following defects:

Note: defects of this size can be easily removed by puttying and do not have any effect on the quality of the finish.

The adhesion of the cardboard to the gypsum core must be stronger than the adhesion between the layers of cardboard. In other words, any coating (wallpaper, tiles, etc.) glued to the surface of the plasterboard must be removed from top layer kraft paper.

Very important technical characteristics of gypsum boards are the bending strength values ​​of sheets of different thicknesses. The breaking load applied across the sheet over a span of 350 millimeters must not be less than the following values:

Application

1. Is it possible to use drywall as a base for tiles??

Yes. Any cement-based tile adhesives adhere perfectly to it.

1. From what finishing You can use GKLV in the bathroom or toilet?

The coating must prevent prolonged direct contact of the material with water. Here are some examples of such finishing:

• Tile. In this case, it is worth paying serious attention to the grouting of the joints: it must be impervious to water;
• Thick vinyl wallpaper. In the bathroom they are glued not with ordinary wallpaper glue, but with PVA, which is more resistant to dampness. To reduce glue consumption, it can be diluted with water;
• Waterproofing "rubber". It is a fully washable coating that is resistant to moderately strong mechanical stress, dry and wet wear.

When decorating the bathroom in my attic, I settled on a combination of a tiled splashback over the bathtub and painting the walls and ceiling with rubber paint. Three years of operation of the bathroom have shown the viability of this solution: the appearance of the walls has not changed at all; There are no signs of wear or other defects.

Curious: I glued the apron tiles not with cement tile adhesive, but with a spot-applied one silicone sealant. It was also used as grout for joints. No leaks were found, the tiles are holding up great.

Tiled splashback over the bathtub and rubber-painted ceiling.

1. Is it permissible to use regular drywall for a bathroom??

Permissible if two conditions are met:

• Premises are provided efficient ventilation, keeping air humidity within 80-90% even when taking a shower;
• The finished finish is absolutely impermeable to water. I discussed options for such finishing a couple of paragraphs above.

1. What thickness of sheet to use for a suspended ceiling - 12.5 or 10 mm?

If the ceiling does not experience mechanical stress from the word “at all”, you can safely buy ceiling gypsum plasterboard with a thickness of 9.5 mm and even arched gypsum plasterboard (6.5 mm). The lighter the skin, the less load the frame will experience during operation. In my case, however, I preferred a sheet with a thickness of 12.5 mm: the sloping ceiling of a bathroom in the attic is easy to hit, and it is better that there are no holes left in it that were not provided for by the design.

1. How to cut gypsum boards?

Just like regular drywall. Curvilinear parts are best cut with a jigsaw with a wood saw or a regular hacksaw; this work involves big amount dust covering all surfaces in the room.

Attention, comrades: gypsum dust is destructive for active cooling systems of computer equipment (CPU, video cards and power supplies). When I was a computer service worker, I was often faced with their refusal after repairs in the apartment. Plaster clogs the bearing bushings and stops it; Moreover, it acts as an abrasive, leading to accelerated wear of open bearings.

KGLV cannot be sawed along straight lines, but breaks after cutting with a knife to a quarter of the thickness. To break off a sheet evenly, you need to place it on the edge of a table or any other elevation and press on the hanging edge. After the gypsum board breaks off, you just need to cut the cardboard from the back side with a knife.

1. Is it possible to use a moisture-resistant sheet to level the floor??

Yes, gypsum plasterboard is one of the materials used to construct dry screeds. Expanded clay screenings are poured on top of the ceiling and leveled according to the beacon rule; then two layers of plasterboard are laid on it with a mandatory overlap of the edges between the layers of at least 50 mm. Top sheets sit on PVA glue and are attached to the bottom with 25 mm long drywall screws.

1. What kind of frame is needed when arranging a partition with your own hands??

In wet areas It is better to use not a block, but a galvanized profile for gypsum boards. CW rack profiles are used as racks; UW guide profiles are hemmed along the perimeter to the floor, ceiling and adjacent walls with self-tapping screws and plastic dowels. The minimum thickness of the partition is 50 mm, however, with a ceiling height of 2.5 meters and above, I strongly advise you to buy a more rigid profile with a thickness of 75 - 100 mm.

The step between adjacent posts is 40 - 60 cm. The distance is measured not from edge to edge of the profile, but between their longitudinal axes. The edges of adjacent sheets must be attached to a common profile.

Partition frame for gypsum board cladding. The distance between the posts is 40 centimeters.

It is better to select the length of the sheet such that it covers the height of the partition with a minimum margin. If you have to cut additional gypsum board sheets, a transverse profile is mounted at the junction with them, to which both sheets are again attached.

The seams are reinforced with serpyanka (self-adhesive fiberglass mesh) and puttyed directly through it with gypsum putty; The heads of the self-tapping screws are also hidden using putty.

I was pleasantly impressed by Eurogips and ABS Saten putties, but I liked Fugenfüller from Knauf, which is very popular in Russia, much less: it is inferior to its competitors in its tendency to form lumps and has a shorter lifespan of the mixed mixture.

1. Is it possible to install gypsum boards on walls without a frame??

Yes, just like any other drywall. For this purpose it is used gypsum glue(for example, Perlfix from Knauf); successfully replaces it gypsum putty or plaster. The wall must first be cleaned of dust and treated with penetrating primer.

The glue is applied to the wall or drywall in separate patches; a continuous bead of glue is needed only at the level of the baseboard: this greatly simplifies attaching the latter to the wall.

By the way: this same technique is convenient to use when finishing door and window slopes. GKLV strips are pressed on top of the putty spread on the wall and leveled with light blows of the palm while controlling the position along construction level or a plumb line.