Tongue-and-groove slabs are used for constructing walls and partitions for both new construction and redevelopment. Gypsum and silicate tongue-and-groove boards are versatile, reliable and affordable.

The standard dimensions of tongue-and-groove slabs (GGP) are 667*500 (width*height) with thicknesses of 80 mm or 100 mm. In one square meter partitions – exactly three GGP. The connection of the slabs, as their name implies, is a tongue-and-groove locking system. It is technologically possible to install 4 m2 of partition in one hour by one worker.

The surface of the PGP does not require additional leveling with plaster; wallpaper can be glued onto them immediately. There are restrictions on dimensions - partitions should not exceed 3.6 m in height and 6 m in length.

For rooms with normal humidity conditions, conventional GWPs are used. For bathrooms, showers, toilets, baths and laundries there are moisture-resistant PGP. The introduction of hydrophobic additives into the composition of moisture-resistant boards makes it possible to use them both at normal and at high levels of humidity. Moisture-resistant PGP have a greenish tint.

Material for tongue-and-groove slabs

PGP material is gypsum or silicate mixtures. Silicate GGPs are denser, stronger and more resistant to moisture. Just like gypsum boards, silicate boards have fire-resistant qualities and good vapor permeability. The sound insulation, strength and heat-shielding properties of silicate GGP are an order of magnitude higher than those of gypsum. The disadvantage is significant weight, one block weighs about 16 kg.

Construction of tongue-and-groove slabs

By design, tongue-and-groove slabs can be solid or hollow. The diameter of the through voids is 40 mm, the voids are located horizontally. Hollow GGP slabs have better thermal protection and lighter weight than solid ones, but their sound insulation is lower than that of dense ones. The voids are located in a special way, with no less than 80% overlap. Technical channels are used for laying power and lighting electrical wiring in cases, and for piping engineering systems. Hollow PGPs are also convenient for zoning rooms, but for the construction of partitions with good sound insulation and the possibility of using partitions for hanging light shelves and other lightweight pieces of furniture and decor, solid slabs should be used.

Masonry of tongue-and-groove slabs

The PGP masonry technology allows you to make a single or double partition. Double partitions are installed to increase sound insulation or to install utility lines in the internal cavity. As a rule, interior and interroom partitions are made single, unless otherwise specified in the project, and interroom partitions are double. The gap between the slabs of the double partition is 40 mm. Sound protection is increased by placing soundproofing material in air gap, securing it adhesive composition.

Conditions for installation of tongue-and-groove slabs

The main and only condition is for the supporting surface of the partitions made of PGP. The base must be flat and horizontal. The tolerance is only 4 mm on a two-meter rail. If the floors in the rooms have height differences greater than permissible, leveling screeds are used. The surface for PGP slabs is prepared by cleaning, dust removal and impregnation with a primer or primers with increased penetrating ability. After the surface has completely dried after coating with a primer, damper pads for the slabs can be glued.

GGP boards are universal building materials. They can be installed under any construction conditions, all year round. Due to their light weight, PGPs do not exert any significant pressure on the base, and are suitable for installation directly on a floor screed or on a floor made of wooden materials. The “foundation” of the GGP is not needed. It is advisable to install partitions made of PGP before plastering the load-bearing walls. In this case, it is easier to make connections to the walls and finish the PGP and the surface will be solid.

The thermal expansion coefficients of GGP slabs made on the basis of gypsum and the structures to which the partitions are adjacent can differ significantly. Therefore, a damper gasket is required along all contours of the partitions made of PGP. Laying tapes made of elastic materials along the perimeter of the junction of the PGP with the floors and walls ensures that the partitions do not deform during temperature fluctuations linear dimensions and during settlement of house structures. The material of damper tapes must be highly porous - silicone, rubber, cork or polystyrene. Felt impregnated with a bitumen composition is also used. The width of the tape must be at least 75 mm, tapes are possible as with the existing adhesive layer, and pasted with compounds used for PGP. Installation of the slabs begins after the glue has completely dried.

The bottom row is very important for the correct construction of the PGP partition. Install the first row of slabs with horizontal and vertical alignment, using building level and a plumb line or laser level. The bottom row determines the correct orientation of the partition. When connecting the slab locks, you should not allow the slightest displacement, this will lead to the partition being wavy. Each slab is mounted, checking the plane with a rule strip or laser level.

Before installing the slabs, markings for partitions with marks are made on the walls, floor and ceiling doorways. You can use a cord for marking, but a laser level is much more helpful in the work and contributes to accuracy.

Start installing the slabs from the corners. The contact surface of the slab with the walls and floor must be coated with an adhesive composition for PGP. The slabs are placed with the groove down, the ridge up and their position is checked. You need to “straighten” the slabs with soft rubber mallets. All contour slabs are fixed to the walls and floor. Fastening the plates to load-bearing walls performed with anchors from reinforcing bars with a diameter of 8 mm, on mounting angles or direct hangers. The fittings must be protected from corrosion with oil or special anti-corrosion compounds.

You can use special fasteners for PGP, L-shaped plates. But more often they use direct suspensions used for the device plasterboard partitions. To fasten the plate using direct suspension it is modified to the required size - the toothed comb is cut off. Fastening elements are attached to the walls and floor with 80 mm dowels, and attached to the PGP slab using self-tapping screws no shorter than 60 mm.

The pitch of dowel-nails or screws vertically should be no more than 1000 mm, horizontally - 1320 mm.

The second and all subsequent slabs are fixed in a checkerboard pattern, the first to the floor, the next to the first slab, coating the joint with adhesive. Fix the slabs with glue, pressing firmly.

The displacement of the seams in the second and subsequent rows of PGP slabs must be at least 150 mm. Installation of the slab in the plane of the partition is guaranteed due to the precision of the tongue-and-groove locking connection, provided that it is tightly fixed without displacements or gaps. A displacement of even a few millimeters can cause a wave, since the error accumulates with the installation of each subsequent slab. Tight joining of the slabs will give the correct vertical position in the plane, and the horizontal installation and the absence of lateral “roll” of the slabs are checked when installing each slab.

To move the joints of the slabs and bring the partition under right size, the slabs have to be cut. For pruning, use wood hacksaws with set teeth and a thick blade. In the case where the partition is located without abutting one or both walls, the ends of the partition can be leveled with an adhesive composition, which can be applied in vertical joints up to 8 mm thick.

To construct a doorway, or any required opening more than 900 mm wide, in the partitions of the PGP, jumpers will be required. There are no GGPs along the vertical edges of the slab additional fastenings not required. For opening widths up to 900 mm, PGP slabs are installed using an auxiliary temporary structure made of wooden block, ensuring the fixation of the slabs until the glue completely hardens. The block is installed above the opening and removed after the slabs are fixed with glue. To install the door frame, frame dowels are used, installing them at the level of the horizontal joints of the slabs. The gaps above the top of the box are filled to the level of the slabs polyurethane foam.

In the case when the opening width is more than 900 mm, 40 mm thick boards, reinforcing bars with a diameter of 8-10 mm or reinforced aluminum profiles with a width of 70 - 80 mm are used as lintels. The support of the lintel in each direction must be at least 500 mm. This requirement is due to the strength gypsum boards PGP, the load on which should be distributed evenly. When using reinforcing bars as lintels, they must first be protected from corrosion. The number of rods is at least two.

The fastening points of the door frames are reinforced with brackets made from straight hangers. The staples are secured with self-tapping screws into pre-made recesses and sealed with putty according to the GGP.

When installing the last row of PGP, it is necessary to leave a compensation gap of at least 15 mm to the top of the floor slab. This is due to the likelihood of floor slabs bending during operation. The gap is filled with polyurethane foam, the excess is cut off and the joint is smoothed with putty.

The corners of PGP partitions must be protected from damage. They use special perforated profiles to protect the corners and attach them to the corners with putty. Apply putty to the corner and press it into it corner profile and level the putty layer. Internal corners They are attached to the walls by gluing with sickle tape.

Pros and cons of partitions made of tongue-and-groove slabs

• The partitions are environmentally friendly, since neither the composition of the slabs nor the technology harmful substances.
• They have good vapor permeability, which helps create a normal microclimate in the house.
• Simplicity of installation and processing, simple technology, light weight of the slabs.
• The slabs are classified as fireproof; their scope of application is not limited.
• Compared to brick partitions, PGPs do not place any significant load on the base and take up less useful volume.
• PGPs have a smooth, high-quality front surface, eliminating the need for leveling with plaster.
• GWPs are available, including at a cost.

Sound protection is sufficient only with double masonry of solid slabs with an additional layer of soundproofing material.

Without fastening to the ceiling, a partition made of PGP may lose stability and “sway”. Fastening must be carried out with a gap to the floor slab of at least 15 mm, in order to avoid deformation of the partition in case of possible deflection of the slab.

It is not possible to install hanging furniture and household appliances. The weight of decorative elements, shelves, etc. that can be mounted on a partition is very limited.

The use of tongue-and-groove slabs for the construction of partitions in a house is the best solution for beginners. Light weight convenient sizes, strong locking connection makes it possible to special effort refurbish the room to your liking. Using tongue-and-groove slabs, you can do the installation yourself in a matter of hours. But first you should study the technology of their installation and the basic properties of the material.

Tongue-and-groove slabs are made of gypsum and silicate. The first ones pour out building gypsum with an admixture of plasticizing additives. To make the latter, quicklime and quartz sand are used, the mixture of which is pressed and kept in an autoclave. Gypsum boards retain heat better and do not allow sound to pass through, but silicate boards can withstand higher mechanical loads and absorb less moisture. Both types of slabs are environmentally friendly, so they are excellent for residential premises. In addition, these materials do not burn, do not emit harmful substances, do not rot or deform.

The slabs are divided into solid and hollow, which reduce the weight of the masonry by almost 25%. The dimensions of the gypsum board are 500x667x80 mm, the silicate board is slightly smaller - 250x500x70 mm. Installation of partitions from such slabs is carried out after completion of all construction load-bearing structures, but before the start of finishing work and laying the finished floor.

Technology and installation features

Masonry made from tongue-and-groove slabs retains heat well, so it can be mounted not only in the middle of the room, but also close to a wall facing a cold room or outside the building. Double partitions help hide wiring and other communications. To divide the interior into zones, partitions with a height of 80 cm or more are installed.

Tools and materials required for installation:

• tongue-and-groove slabs;
• building level;
• cement-sand mortar;
• adhesive composition;
• brackets for fastening;
• anchor dowels or screws;
• felt seal;
• gypsum mortar;
• primer;
• putty knife;
• hacksaw;
• screwdriver;
• rubber mallet.

Step 1. Preparing the site

If the partition is installed in a new house before finishing work begins, it is necessary to check the evenness of the floor and walls where the tongue-and-groove slabs meet. Any defects should be removed: sagging is removed by grinding, and depressions and cracks are sealed with cement-sand mortar. After drying, the walls and floor are covered with primer.

If there is a need to install a partition during an ongoing repair, the lines where the partition fits are marked on the walls and floor. Then carefully cut finishing coat according to the markings and remove to the base. You cannot attach slabs to wallpaper, paint, or decorative plaster, just like linoleum, parquet, or laminate. If the wall or floor is tiled ceramic tiles, and the coating holds very firmly, you don’t have to remove it.

To ensure that the partition is even over the entire area, a cord is pulled between the walls along the markings at a height of 30 cm from the floor. This makes it much more convenient to control the vertical position of the slabs. Now, along the line of contact of the partition to the base, glue special seal. Its width should correspond to the thickness of the slab - 8 cm. Use as a sealant cork backing or bitumen-impregnated felt.

Step 2: Installing the first row

The lower ridges of the slabs of the first row are cut off with a hacksaw. Glue is applied to the top of the seal in small portions, both on the vertical and horizontal parts. Take the first slab and, on the side that will be adjacent to the wall, insert a perforated bracket into the groove. Part of the bracket should protrude a few centimeters above the slab. The bracket is attached to the wall either with self-tapping screws or anchor dowels if the base is concrete. The slab is placed with the groove up, leveled, pressed tightly to the base of the wall and floor, and tapped with a mallet. At the bottom, on the side where the second slab adjoins, a piece of bracket is again inserted into the groove and screwed to the floor with dowels.

If this plate is installed unevenly, the rest will completely repeat the angle of inclination. Then it will not be possible to level the masonry due to the interlocking joints, so the first slab is given the most attention. After the glue has set, install the next block of the bottom row. Glue is applied to the side ridges and grooves in such a way that the seams between the plates do not exceed 2 mm in thickness. Excess glue is immediately removed with a spatula, and the masonry is checked with a level. Again, attach the bracket at the bottom and secure it to the floor with anchor dowels. Each subsequent block is placed after the glue on the previous one has set.

Step 3. Install the next rows

Since the slabs of the second row must be positioned with offset seams relative to the first, one slab must be sawn in half. At the beginning and end of the row, staples are attached to the sections adjacent to the wall. The glue is made more liquid; it is applied only to the side and bottom grooves of each block. Be sure to check the horizontal and vertical of the masonry. The third row is installed after the glue in the second row has set.

Step 4. Installation of the last row

The top row of masonry should not be closely adjacent to the ceiling. According to the technology, it is necessary to leave 1.5-2 cm between the ceiling and the slabs. To do this, glue staples are inserted into the upper grooves of the last row and screwed to the ceiling with anchor dowels. After installation is completed, the resulting gap should be blown out with foam, and all excess should be cut off.

Installation of a partition with an opening

If you plan to make a door or window opening in the partition, you need to think about ways to attach the slabs above it. For openings with a width of no more than 80 cm, it is allowed to install slabs on door frame or any temporary support, but only on the condition that there is 1 row of blocks above the opening. If the opening width is more than 80 cm or there are several rows on top, be sure to make a strong lintel.

Step 1. Marking and installation of the first row

On the base, mark the location of the partition vertically and horizontally. Connect the markings on opposite walls with two parallel lines along the floor. Determine the location for the opening and mark it on the lines. Further, the installation process is identical to the previous version, only the row is divided into 2 parts. The box can be installed at the first stage of masonry, or it can be inserted after installation is completed. Openings are also made without a frame if you do not plan to hang the door.

Step 2: Install the jumper

Having reached the top of the opening, cutouts are made in the slabs adjacent to both sides for the lintel. A steel channel 35x80 mm or wooden beam the corresponding section. The depth of the cutout is approximately 50 cm, the width is equal to the thickness of the beam. The cutouts are coated with glue and the beam or channel is tightly inserted. When the glue has set, you can begin installing the slabs over the opening.

Step 3: Decorating the corners

To ensure that the outer corners of the partitions are not damaged and remain level, they must be strengthened. To do this, use a perforated corner profile 30x30 mm. Using a spatula, apply putty to the corner, apply the profile, press it well along its entire length, and cover it with another layer of putty on top. The profile is mounted with an overlap of 3-5 cm, the putty is very carefully and evenly distributed over the surface. To achieve maximum evenness, it is recommended to use an angled spatula.

For inside corners, the biggest problem is cracks at the joints. Serpyanka will help to avoid their appearance: putty is applied to the corner, the reinforcing tape is cut off required length, bend it in half lengthwise and apply it to the putty. Add another layer of putty and use a spatula for the inner corners to spread it evenly. When choosing self-adhesive tape, you do not need to use putty.

Step 4: Finishing

If you plan to attach wiring and install sockets and switches on the partitions, use an electric drill to drill grooves and recesses in the slabs to the size of the boxes. After installation, all recesses are sealed with putty and sanded. In most cases, leveling the surface with putty for tongue-and-groove slabs is not necessary. After priming, the slabs can be painted or coated decorative plaster, paste over with wallpaper and ceramic tiles. To paint tongue-and-groove slabs, you cannot use paints based on liquid glass or lime.

Light objects - paintings, mirrors, lamps - can be attached to ready-made partitions using plastic dowels. Heavy bookshelves or kitchen cabinets are secured with lightweight anchor bolts.

Video - Do-it-yourself installation of tongue-and-groove slabs

Partitions made from PGP are used for redevelopment of premises or delimitation of apartments in new buildings. They are distinguished by their smooth surface, ease of installation and budget cost. The blocks are connected using a tongue-and-groove system, the seams on the finished structure are minimal. This makes it possible not to putty, but to immediately coat the wall with a primer and decorate it.

Tongue-and-groove slabs for partitions are rectangular elements with longitudinal grooves and protrusions (ridges) at the joints, necessary for a strong and seamless bond. Their standard sizes- 667x500x80 mm, thickness can be 100 mm.

There are tongue-and-groove slabs for partitions large sizes, height from floor to ceiling.

Their installation is very quick, but you can’t handle it yourself due to the heavy weight building elements There is a whole team involved in the installation.

Types of tongue-and-groove blocks for interior partitions depending on the material of manufacture:

View	Preparation method	Positive traits
Gypsum boards	Made from gypsum with plasticizing additives. Gypsum blocks for partitions are divided into moisture-resistant (green) and those whose moisture permeability is high.	Allowed for installation in children's rooms. Another advantage of gypsum blocks is their ease of processing. Gypsum blocks can be sawn at any angle - gypsum elements can be used to create structures of various shapes and configurations.
Silicate blocks	From quicklime and water with the addition of quartz sand using an autoclave.	They have significant sound insulation qualities. Compared to gypsum, they are resistant to moisture and have greater strength and durability.

PGP partitions can be solid or hollow. The latter weigh less (22 kg compared to 28 for monolithic ones), but cannot withstand hanging massive household items.

Advantages of GGP partitions

The general advantages of partitions made of gypsum or silicone tongue-and-groove plates are:

The use of hollow slabs reduces the load on the supporting base.

The main advantage of such building elements: installation of tongue-and-groove partitions is not difficult. Finished design does not require special finishing work. There is no need to plaster the wall, just cover it with a primer and decorate it.

Installation of partitions from PGP

The installation of partition elements made of gypsum or silicate in the apartment begins after the construction of load-bearing parts, but before laying the subfloor and starting painting and plastering work.

Installation of a partition made of standard-sized tongue-and-groove slabs takes only two to three days. This is due to the convenient tongue-and-groove system and the absence of the need for additional reinforcement.

When joining, any deviations along the planes are eliminated, which allows you to quickly assemble an even wall without even a millimeter error.

If you need to hide communications, special grooves are made in solid blocks. In hollow ones, wires and pipes can be laid in the internal cavity. If the construction of partitions from PGP does not involve gating, the double wall method is used. But they “eat up” twice as much space.

Materials and tools

To build a partition from tongue-and-groove slabs you will need the following set of tools:

• roulette;
• electric drill;
• mallet;
• construction level;
• putty knife;
• hand saw;
• ruler, pencil;
• screwdriver;
• mixer for mixing glue.

The materials you will need are the blocks themselves, a seal made of cork or felt, edge tape, rope, glue, primer. Fastening elements are also needed: screws, dowel-nails, fixing brackets - straight hangers or corners.

Preparatory work

The construction of a partition created from tongue-and-groove blocks requires certain preparation. First of all, you need to check the compliance of the floor and ceiling horizontal levels, and make sure that the tongue-and-groove slabs are closely adjacent to them: smooth out prominent irregularities, fill cracked areas and depressions with a solution of cement and sand.

The blocks are brought into the room no later than 24 hours before installation so that the material “adapts”, that is, has the necessary humidity and temperature.

Used to build a wall acrylic glue based on gypsum.

But it is very expensive, so many people replace it with regular tile adhesive or a solution of cement and sand in a ratio of 1:3 with the addition of polyvinyl acetate glue. If everything is thoroughly mixed, the result is a fairly plastic and finely dispersed mixture that can be easily applied with a spatula. It is easier to make masonry with mortar, since its setting time is longer than that of gypsum glue.

Before constructing interior partitions, all surface areas in contact with them are primed and marked according to the previously created drawing.

Laying tongue-and-groove blocks

It is not difficult to assemble a partition from tongue-and-groove slabs with your own hands. The main thing is not to violate the technology when constructing a bulkhead from PGP.

Installation instructions for partitions made of tongue-and-groove slabs - step-by-step instruction:

If the structure of a false wall requires an opening for a door, it is necessary to fix the blocks located on top. When installing one row of blocks over an opening up to 0.8 m wide, it is permissible to install them on a door frame or a non-permanent wooden lintel.

If the width is more than 0.8 m or it is necessary to lay several rows, you will need to install a lintel for tongue-and-groove slabs made of wooden blocks or a metal channel.

It is mounted with glue in specially made cuts approximately 5 cm deep in corner blocks. After the solution has dried, the upper rows of slabs are installed.

After completion of work tongue-and-groove partitions needs to be primed. Especially if tongue-and-groove gypsum boards were used. The primer ensures adhesion of the decorative layer and will avoid the appearance of surface defects.

Any type of wallpaper and painting are suitable for finishing. It is better to finish the kitchen and bathroom tiles or plastic panels. For the living room, children's room, and bedroom, wallpaper or decorative plaster is often chosen.

Hello to all readers and blog visitors.
Just the other day I was considering the topic of partitions from. This became a reason for discussing other modern options, for example, construction partitions made of tongue-and-groove slabs. Moreover, I myself really like this option, and perhaps I will use it in a house that...

Tongue-and-groove slabs are a convenient, practical, economical building material for rapid construction partitions

I want to ask you one question. Tell me, can two people install a partition of 20-30 m2 in one day? They can. If gypsum tongue-and-groove slabs were used for the installation of partitions. Yes, perhaps I even thought about 2 people, and one can handle it. Why so sure? With just my own hands I built the walls of a house from expanded clay blocks, and a tongue-and-groove slab weighs a little more, at least hollow - I already held it in my hands while studying it in a construction hypermarket. But this is not the only issue. With my usual pedantry, I studied the issue regarding these slabs, now I will share it, and you will see for yourself. Looking ahead a little, I will say that despite the apparent simplicity of the masonry (due to the magic grooves), nevertheless, the result will be successful only if they are used correctly.

Construction of interior partitions

The most popular material for the device interior partitions in apartments or residential buildings are: brick, slag concrete, expanded clay concrete, gas silicate blocks, drywall, and today the hero of the article is becoming no less popular - plaster tongue-and-groove slabs (GWP). The choice of the most optimal option depends on the specifics of the work. For example, they are more often erected where the structural fencing requires special strength and increased sound insulation. Yes, that's just the construction brick partition, as well as its subsequent finishing and gating - very painstaking work. But you really want to make your task easier and choose the best option, especially when you do everything in your own hands. In general, my motto in this regard is “ minimum body movements, with greater efficiency". And for this you need to choose the right material and technology. And tongue-and-groove slabs fit my motto the best way.

Construction of a partition from PGP

Structures made of expanded clay concrete, slag concrete and are inexpensive. And by the way, due to their size, gas silicate blocks are also laid quite quickly, plus they are even lighter than tongue-and-groove slabs (but at the same time less durable). But they however require plastering. And expanded clay and slag concrete are also not ideal in terms of environmental friendliness. Moreover, everyone listed options There are no magical grooves due to which the masonry turns out perfectly smooth. In general, when speed and ease of construction are paramount for us and there is neither the desire nor the means for it, and with the condition that in the future there are no plans to hang very heavy interior elements on the walls (for example, a 100-liter boiler), then it is very good option there will be a tongue-and-groove slab.

Characteristics of tongue-and-groove slabs

So what is tongue-and-groove gypsum board and what is the technology for its production? The PGP is a monolithic block with dimensions of 667 x 500 mm and a thickness of 80/100 mm with ridges and grooves along the joining and supporting surfaces. Its weight may vary from 20 to 37 kg, it depends on the type of product and thickness. The technology for producing GGP is quite simple. A solution of gypsum and water of a certain thickness is poured into a special “gypsum cooker”, where the water gradually evaporates and the solution thickens. Next, the resulting mass is poured into molds and sent to the drying chamber, where the material hardens through the hydration reaction of the gypsum binder.

The tongue-and-groove slabs are dried. They are all so white and slender, I just want to take them to my place, to my house)

After which the finished slabs are left to stand for at least another day. The result is an environmentally friendly product that is not hazardous to health. Which is odorless, does not contain any toxic compounds, is characterized by increased vapor permeability and is, as it were, a regulator of the humidity regime in the room, like all products made from pure gypsum.

Gypsum tongue-and-groove boards are fire-resistant. Their soundproofing characteristics meet all GOST standards for interior partitions (41 dBA). Among other things, on smooth and flat surface walls made of tongue-and-groove slabs, after the joints have been erected and puttyed, you can immediately glue wallpaper, and after complete puttying, paint them.

Bathroom partitions made of GGP gypsum boards

Manufacturers, price

GGPs are produced by many companies, the leaders of which are considered to be the well-known, good old one, as well as "BelGIPS", "Volma" And Peshelansky gypsum plant. One of the important factors of these slabs, compared to other wall building materials, is their relatively low price - 150-260 rub. a piece. Full-bodied ones are more expensive. In order not to be unfounded, right now I will visit online my favorite Leroy Merlin (by the way, there is also a favorite Baucenter, but since it is not in all cities, so I am bringing Leroy), you can see the prices in the screenshot (2019).

The price of tongue-and-groove slabs on the Leroy online storefront

And by the way, they are all quite positive reviews, however, some people complain a little about the geometry (slabs from the Angarsk plant). But here, as elsewhere, it depends on the manufacturer, so pay attention to this when purchasing. But everyone unanimously declares - speed and ease of construction of partitions! What else do you need, strength? They are quite durable, at least stronger than the gas silicate slabs that are also fashionable today. But they are inferior to brick, yes. But we know that construction options that are ideal in all respects do not exist in nature, there are only optimal options in relation to a given situation. But now it’s time to discuss the pros and cons of these plates.

Pros and cons of tongue-and-groove slabs

Like anyone else building material, these plates have their pros and cons, let's see what's more.

Pros:

1. Do not contain toxic substances and components.
2. Not flammable, fireproof.
3. They have increased gas and vapor permeability.
4. Partitions made from these slabs are easy and quick to erect.
5. Simple processing (easy to plan, drill, saw).
6. The front side does not need additional. plastering.
7. After finishing the seams, the surface can be immediately tiled, wallpapered and, in some cases, painted.
8. Small price.

Minuses:

1. Not suitable for load-bearing walls/partitions.
2. Manufacturers suggest using it only in buildings where all shrinkage processes have already completed (in principle, this is also true for other materials).

Have you considered the pros and cons? Draw your own conclusions.

Types of tongue-and-groove slabs

There are two main types of PGP on Russian markets: standard and moisture resistant(hydrophobized), which include special additives that reduce moisture absorption (not higher than 5%). The former are used in rooms with a normal and dry climate (no higher than 60% humidity), the latter are preferably in toilets, bathrooms and other “wet” rooms where the humidity exceeds 60%.

Note: in rooms with high humidity, manufacturers recommend using moisture-resistant tongue-and-groove boards. Finished partitions made of PGP are covered with ceramic tiles, and waterproofing is applied to the area of ​​foreseeable exposure to moisture.

It is worth noting here that some manufacturers paint moisture-resistant boards green during the manufacturing process, while others apply markings confirming this. But one way or another, there is an easy way to find out which slab in front of you is moisture resistant or not. Of course, just spray water on it. If drops roll off the surface (manifestation water-repellent properties) and are not absorbed - this is a hydrophobized board.

Among other things, both standard and moisture-resistant GGP can be full and hollow. The latter are practically in no way inferior to the full-bodied ones in terms of strength, but they are 25% lighter, and in addition, they are lower in price. For example, the mass of a solid block from Volma, 667 x 500 x 80 mm, weighs 26-28 kg, while the mass of an identical but hollow block is 20-22 kg. Or mass Peshelanskaya a solid slab of the same dimensions weighs 28-30 kg, and a hollow slab weighs 24-26.

Installation of partitions from hollow tongue-and-groove slabs

Knowing this feature and using lightweight slabs, you can increase productivity by reducing the labor intensity of work, and at the same time reduce the load on the floor, or save, for example, on transportation by increasing the number of GWP blocks in one machine.

Installation of partitions from KNAUF tongue-and-groove slabs

The entire technology of laying/installing the PGP is presented step by step as follows (taking into account the recommendations of the manufacturers themselves):

Installation of KNAUF gypsum boards

Gypsum tongue-and-groove slabs are used not only for the construction of interior partitions, but also for interior decoration of external walls. In both cases, work with them begins only after the construction of all enclosing and load-bearing structures of the building, but before laying the finished floor.

IN winter time Installation of slabs can be carried out even in unheated rooms, provided that the temperature is not lower than 5 o C. Please note that the slabs require acclimatization, so they must lie in the room being repaired for at least 4 hours.

The construction of partitions from PGP is somewhat reminiscent of the assembly children's construction set Lego. An important installation condition is to correctly combine each element and strictly observe the vertical and horizontal position of the rows of blocks. Confidence in the strength of the structure is guaranteed by assembly adhesive prepared from mixtures recommended by the manufacturer of the boards.

Note: to attach various kinds of objects to tongue-and-groove partitions, a number of requirements must be met. When hanging hanging shelves, sanitary and other appliances (weight load from 30 to 100 kg), special corrosion-resistant anchors are used that pass through the entire thickness of the walls. When hanging pictures, mirrors, small shelves with a weight load of up to 30 kg, you can use conventional, anchor plastic dowels. If necessary, place different engineering communications on partitions made of PGP, or in order to increase sound insulation, it is preferable to erect a double partition. In this case, the first to be erected is the partition to which it will be attached. engineering equipment or soundproofing material.

To improve your understanding of the installation of tongue-and-groove slabs, you can watch this video from the manufacturer himself, everything is very detailed and clear:

Installation errors

If a partition made of these slabs “rattles” or allows sounds to pass through when struck lightly, this indicates that some mistakes were made during their installation. For example, maximum permissible dimensions exceeded partitions. They should be: 4.5 x 6 m for slabs with a thickness of 100 mm and 3.6 x 6 m for slabs with a thickness of 80 mm.

Another one of possible errors – rigid connection of the partition with the adjacent structure(should only be done using mounting adhesive), which is only possible in those rooms where there are no regulatory conditions for sound insulation.

And finally, there may be such an option - the partition is poorly attached when the slabs are elastically connected (through the gasket). The technology for installing tongue-and-groove blocks suggests using, in addition to glue, special staples– 100 x 120 x 20 mm. It is worth noting here that the density of the elastic cork gasket must be at least 250 kg/m3, thickness - 5 mm. Instead of cork, you can use a pad made of bumized felt with a density of at least 300 kg/m 3, also 5 mm thick. And if you did everything strictly according to the instructions, then installation errors are excluded.

Video of installation of partitions from PGP

For many it is easier to see once than to read 10 times. One video is good, but two or three are better in order to better understand the material.

This video shows the process of laying slabs on glue:

And in this video there are details on sawing:

And finally, applying putty on the surface of the slabs:

“I worked in many places, mastered a lot of skills. From construction to programming. And by profession I am an ecologist. A few years ago I took a plot of land and began to actively study the construction business in theory and practice. Now the house is standing, and I write articles :)”

Remodeling an apartment is a common thing; all that remains is to decide on the material and technology for constructing new walls and partitions. We suggest paying attention to tongue-and-groove gypsum boards - a practical, affordable and universally applicable material.

Tongue-and-groove slabs and their scope of application

Tongue-and-groove slabs (GGP) are rectangular blocks of gypsum fiber 80 or 100 mm thick. The size of the slabs is standard - height 500 mm, width 667 mm. To strengthen the connection between the plates, their edges are made in the form of grooves and ridges. The technology allows the construction of up to 4 m 2 of partitions per hour.

Standard slabs are used in rooms with normal humidity conditions; moisture-resistant GGPs are used for bathrooms and baths. The plate can be either solid or hollow with horizontal through holes with a diameter of 40 mm. A hollow slab is not only characterized by reduced lightness and thermal conductivity; when laying slabs in one row, the cross-sectional alignment of the holes is guaranteed to be at least 90%, which allows the cavities to be used as technical channels for laying electrical wiring or pipes.

Preparing the installation site

PGP is universal in use and can be installed in almost any construction conditions. Due to their low weight, they do not require a foundation and can be installed directly on a screed or even on a solid wooden floor.

The only requirement for the location of the partition is that the base should not have a horizontal height difference of more than 2 mm per 1 meter. If the floor in the room does not meet these requirements, then a leveling screed 20-25 cm wide is made.

The surface of both the screed and the floor must be coated several times with a deeply penetrating primer, then dried and cleaned. It is optimal to install the PGP before plastering the load-bearing walls, so the finishing coating will be more seamless.

Damper pad device

To compensate for thermal expansion and settlement of the building, a tape of elastic material is laid at the junction of the partitions with the floor and walls. This could be rubber, balsa wood or silicone tape.

Base cover thin layer glue for GGP and lay the tape. It takes 6-8 hours to harden, after which you can begin constructing the partition.

Installation of the first row

Installation of PGP is carried out strictly in rows, starting from the bottom. The first row is basic and must be correctly oriented in space, vertically and horizontally. The most common error during installation is “waviness” of the partition, which occurs due to a slight displacement in the grooves. To eliminate this phenomenon, when laying each slab, you need to use a rule strip and check the general plane of the partition against it.

The first row should be laid from the corner. The area where the slab touches the floor and wall is covered with GGP glue, then the block is installed with the ridge up and its position is leveled. It is convenient to use a rubber mallet to move the slabs. Be sure to fasten the first block to the wall and floor using L-shaped plates, the role of which is successfully performed by direct hangers. To use them, you need to cut off the toothed comb from the edges and bring the thickness of the plate to the width of the comb. The plates are first attached to the base using quick-installation dowels with a length of 80 mm or more, then to the slab with black self-tapping screws no less than 60 mm long.

Subsequently, the slabs are attached through one side: on one side to the floor, on the other - to the previous slab, with a preliminary coating of the joint with a thin layer of glue and strong pressing. To control the placement of slabs according to the project, it is convenient to use lacing or a laser level. It would also be a good idea to mark the partition on the floor and walls indicating the locations for the doorways.

Construction of a partition and adjoining to load-bearing walls

The second and subsequent rows are laid with a seam offset of at least 150 mm. The slab is located strictly in the plane of the partition thanks to the tongue-and-groove connection. Enough to control horizontal level installation and lateral roll. The outer slabs are attached to the load-bearing walls with L-shaped plates or reinforcement rods 8 mm thick.

To move the joints and bring out the edge of the partition, trimming of additional elements will be required exact size. It is best to use a regular wood hacksaw with a thick blade and set teeth. If the partition is not adjacent to another wall, its end can be made perfectly flat by increasing the thickness of the glue in the vertical seam from 2 to 6-8 mm.

Arrangement of doorways

The vertical edges of the openings do not require additional reinforcement. To lay slabs over an opening with a width of less than 90 cm, it is necessary to build a supporting U-shaped strip, which can be removed after the glue has dried.

Openings 90 cm wide or more require laying on top of a series of support beam slabs - 40 mm boards or 70 mm reinforced CD profile. To reach one level, it is recommended to trim the slabs laid on top of the crossbar. The jumper is placed into the partition at least 50 cm on each side.

Corners and intersections of partitions

At the corners and junctions of partitions, it is necessary to strengthen the masonry. To do this, the slabs are laid across a row, alternately covering the joints. In places where the relaying occurs, it is necessary to remove the ridges; they are cut with a hacksaw into sections of 4-5 cm and chipped with a chisel.

The connection can be further strengthened with sections of straight hangers or welded T-shaped elements made of smooth reinforcement. In any case, additional trimming of the ridge to the required distance will be required.

Top row bookmark

When laying the top row, a greatest number waste due to trimming the desired height. They can be glued and placed in voids, since this row of partitions does not experience a strong functional load.

Electrical wiring is usually laid in the voids of the top row, so it is important to prevent glue from getting into the holes. To facilitate cable pulling, you can additionally drill holes or make transverse holes with a diameter of 45 mm.

When laying the top row, it is necessary to maintain a gap from the ceiling of at least 15 mm to compensate for the deflection of the ceiling during settlement. The top row also needs to be attached to the floor of every second slab. Upon completion of installation, the remaining space is filled with polyurethane foam.

Interior finishing options

At correct installation The GWP curvature of the surface is no more than 4-5 mm per meter of plane. This is an acceptable indicator for wallpapering walls. External corners partitions must be protected with a perforated corner profile mounted on starting putty. The internal corners are also puttied, strengthening them with sickle. The joints between the slabs are cleaned abrasive mesh 80 grit, then the entire surface is coated twice with a high adhesion primer.

Leveling walls made of PGP can be done with any finishing putty, but the coating will need to be reinforced with fiberglass mesh. Often, puttying partitions is used only to hide seams; as a rule, the layer does not exceed 2-4 mm. The tiles can be laid directly on the surface of the PGP with preliminary priming.