Rotband gypsum plaster universal instructions. Application of rotband plaster

A highly adhesive, non-shrinking, universal dry plaster mixture based on gypsum, lightweight aggregate and polymer additives Rotband was developed by the West German company KNAUF, a world leader in the production of dry building mixtures and construction equipment.

Gypsum plaster Rotband KNAUF is used for plastering interior spaces and is used for various bases made of brick, concrete, blocks, etc.

Maximum thickness of one layer 50 mm
Minimum thickness of one layer 5 mm
Grit size up to 1.2 mm
The solution output from 100 kg of mixture is 120 l
Consumption 8.5 kg/m2
Drying 7 days
Ultimate compressive strength more than 2.5 MPa
Density 950 kg/m3
Adhesion more than 0.5 MPa
The lifespan of the solution is 20-25 minutes
Bag weight 30 kg
Shelf life 6 months

1. The consumption of Rotband gypsum plaster is 2-3 times less than traditional cement-sand plaster plaster mixtures.

2. The gypsum-based mixture Rotband KNAUF has a high water-holding capacity - the mortar mixture does not separate and does not dehydrate even on porous, well-absorbent substrates and at elevated temperatures.

3. Applying the mixture in one stroke of a plaster layer up to 50 mm thick without preliminary spraying.

4. If necessary, thicker layers can be applied
plaster mixture based on Rotband gypsum in two times.

5. Gypsum plaster regulates the humidity conditions in the room - it “breathes” and creates a favorable microclimate in the room.

6. The versatility of the Rotband KNAUF material - simultaneous plastering and puttying of the surface, production of decorative elements, repair and restoration work.

7. Rotband plaster material is made from environmentally friendly natural mineral and does not contain substances harmful to human health.

8. Rotband plaster gypsum mixture protects the surfaces of combustible materials (CBF, expanded polystyrene, etc.) from fire.

9. The versatility of the gypsum-based plaster mixture Rotband KNAUF - simultaneous plastering and puttying, production of decorative elements, repair and restoration work.

Work order:

Pour 18 liters into a plastic tank clean water, based on one bag of 30 kg of dry mixture, fill 5-7 trowels with Rotband dry plaster mixture and mix.
Then pour the entire mixture out of the bag and mix with a mixer or stirrer (you can pick up an assortment of mixers from the PROTOOL brand in our online store master-stroy.net) until you obtain a homogeneous, lump-free mass.

Leave for five minutes and stir again. During the process of applying the solution to the surface to be plastered, you cannot add water or dry mixture! It is not allowed to add other components to the solution!

Applying plaster mortar:

Apply the prepared Rotband plaster mortar to a surface 5-30 mm thick within 20-25 minutes after dissolution. The Rotbant solution should be spread onto the ceiling with a plaster falcon “on itself”, applied to the wall with a trowel or spread with a plaster falcon from the bottom up, and then leveled using a zigzag movement.

If you want to get a thicker layer, you need to “comb” the first, still soft layer of Rotband gypsum plaster mixture with a plaster comb and only after hardening, but not earlier than a day later, apply the second plaster layer.

Bases made of CBPB and expanded polystyrene should be plastered with reinforcement over the entire surface with fiberglass mesh with a cell of 5x5 mm. Mesh consumption approximately 1.2 m? by 1 m? Surfaces.

Surface leveling:

As soon as the plaster mortar is based gypsum mixture KNAUF Rotband will begin to set (approximately 45-60 minutes after mixing), level the surface with a metal trapezoidal lath or a wide metal spatula, cutting off excess and filling the recesses. Cut off uneven areas in corners and slopes with a plaster plane.

After drying, ceramic tiles can be glued onto such a surface using Knauf Fliesenkleber tile adhesive, after priming the surface with Knauf Tiefengrund deep penetration primer (in places where water directly hits the tiles, prime with Flechendicht waterproofing). The minimum thickness of the Rotband plaster layer for tiles is 10 mm.

Surface grouting:

If a surface plastered with Rotband KNAUF plaster mixture is being prepared for painting or wallpapering, then after a short exposure (about 15 minutes), moisten the surface plastered with Rotband generously with water and rub it in a circular motion with a hard sponge grater to level out possible unevenness and marks from a trapezoidal lath or wide spatula.

Smoothing the surface (glossing):

After letting the plaster base stand for a short time until a matte surface appears, smooth the plaster with a wide spatula or a stainless trowel (trowel) using wide movements. You can glue wallpaper onto such a surface. To achieve a glossy surface, it is necessary to moisten the plaster generously again within 24 hours, but not earlier than 2.2-3 hours after mixing the dry Rotband mixture with water, and re-smooth it with a metal float.

After this treatment, there is no need to putty the surface of the plaster; it is suitable for high-quality painting. After smoothing the surface of the ceilings, cut through the plaster layer with a Stucksage saw to the full depth along the entire perimeter of the room to prevent the formation of cracks.

Surface structuring:

The surface plastered with Rotband gypsum mixture can be structured, i.e. give it a different pattern or texture. To do this, after applying and leveling the mixture, as a rule, it is necessary to roll the not yet hardened surface with a grooved roller or give it some kind of structure with a molding tool, for example, a trowel, grout, or a hard brush.

To quickly dry a room plastered with Rotband, you need to ensure good ventilation of the room, but it is worth remembering that a non-dried plaster base is afraid of drafts. The temperature of the base for Rodband plaster should not be less than +5? C and no more than +35? C. The drying time of the surface depends on the temperature of the base and the humidity in the room.

Plastering ceilings.

The technology for plastering ceilings is practically no different from the technology for plastering walls. The differences are that the ceilings are plastered without beacons, and after smoothing the surface, the plaster layer is cut with a special saw to the entire depth of the layer along the perimeter of the room. This separation along the line of contact between the ceiling surface and the wall is done in order to prevent the formation of cracks near the walls.

In domestic practice, plaster without beacons (as a rule) is performed with a plaster layer thickness of up to 15 mm. With a larger leveling layer and, especially, during repair and construction finishing works ah with different deviations of marks along the horizon of floor slabs, the decision to place beacons is more rational, since with their help additional conveniences are created for the high-quality performance of subsequent production operations on plastering surfaces.

Technologically, the installation of beacons on the ceiling surface is carried out according to the following method. First, it is necessary to identify deviations of the ceiling plane from the horizon. To do this, marks are drawn with a pencil on each wall using a water level, defining its horizon. Then, using a metal tape measure, they are taken out to the ceiling and beacon lines are struck along these marks along the perimeter of the walls.

As noted above, the lines are marked using a cord breaker with a dye thread. It is very simple and quick to mark the horizon under the ceiling with a laser level. For this purpose, it is enough to lean such a level against the ceiling, and then instantly and without error the marks defining the horizontal level will appear as red dots on the walls.

In repair and construction work, technological operations with variable layer thickness up to 5 cm using the Rotband mixture are carried out using the following technology. Surface preparation, priming and placement of beacons is carried out using the methods described above. The pitch of the beacons on the ceiling is equal to the working length of the rule (usually 1.2 m with a rule length of 1.5 m).

Many finishing craftsmen prefer to install beacons along the short side of the room, others along the long side. The space between the beacons is formed by strips of work areas. If the thickness of the plaster layer is 3 cm, first a thin plaster layer from Rotband is applied to the entire area of ​​one area using a plastic trowel or a wide spatula.

For ceilings, you can use a mixture of “Rotband” and “Vetonit KR”: 2/3 parts “Rotband” and 1/3 part Vetonit KR.” With a thickness of 3-5 cm, when it is necessary to lay a large layer of “Rotband” for leveling, first make a cast of a solution of medium density, consisting of 1/3 part of the cement plaster mixture and 2/3 part of “Rotband”.

Solutions must be produced quickly. Watch it carefully to make sure there are no air holes or shells.

The second layer and grouting is carried out only with a mixed solution of “Rotband”. On the first fresh covering layer, a reinforcing plaster mesh is embedded (in no case glued) to a depth of approximately 5 mm (reinforced meshes will be discussed in detail below). The mesh is easily cut to the required length with scissors; the overlap of the canvases should be 10 cm. Then a second gypsum plaster is applied to the reinforced surface, which is leveled with an aluminum rule. (the mixture is prepared for one strip of about 10 kg, depending on the length of the section and the thickness of the layer.

In the resulting plaster layer, the reinforcing plaster mesh should be located in the middle, and since high-quality meshes allow moisture to pass through well, after drying they form a durable monolithic mesh. A monolithic system is created: plaster - mesh - plaster. Then, in a similar way, preparation is carried out from the plaster layer on subsequent sections of the ceiling.

After this operation, the opinions of experts differ. For many, extending the gypsum plaster layer with “Rotband” for painting on the ceiling is more difficult than applying a leveling and finishing layer with putty.

Regardless of the final decision, to continue preparation for finishing, it is necessary to allow the ceiling to dry, after which the surface of the completed plaster acquires an even light gray color. The surface is then sanded using a hand sander fitted with a plaster mesh and primed with any penetrating primer.

Only after this are the subsequent technological operations carried out. Preparation for different kinds finishing with “Rotband” using Knauf technology was described above. An option for further preparation for finishing with putty is possible.

If you use the well-known dry putty “Vetonit”, then work with “Vetonit KR” (easier to sand) or “Vetonit LR” (it contains more glue). Since Vetonit putties are easily chipped when sanded, the finishing layer is secured with PUFAS putty.

Before each layer of putty, a primer is required; if this rule is not followed, peeling may occur or air pockets may appear.

When working with “Rotband” and “Goldband” mixtures, finishing specialists give preference to “Rotband”; it can, if necessary, be mixed with other mixtures, but not with “PUFAS”, which quickly sets and hardens.

A prerequisite for the use of dry mixtures is the shelf life. You cannot work with expired material - this is a deliberate defect - peeling from any type of primer, air pockets, cracks.

Primer

Whatever the base surface (substrate) is - concrete or metal, plaster or wood - all coatings must adhere firmly to it. For this reason, primers are used, which penetrate deeply into the base and improve its adhesion (adhesion) to the subsequent layer.

With their binding and strengthening properties, primers often prevent damage to the underlying surface (for example, when removing wallpaper). In addition, the primer layer promotes a more uniform application and absorption (absorption) of materials such as paints, plasters, wallpaper glue, putties, etc. The result is obvious: the quality of the finishing of the premises increases.

Of course, you don’t have to prime, say, concrete walls. But in this case, the likelihood of poor-quality repairs increases significantly: subsequently the plaster may fall off, the wallpaper may sag; In addition, under the influence of moisture, it is possible that all kinds of defects (stains, stains, cracks) may appear on the finishing layer.

Thus, applying a primer before applying dry mix or plaster is an additional guarantee of the quality of the future surface. Primer treatment costs an average of $0.5 per 1 m2, and the cost of all plastering works with subsequent painting and wallpapering can reach $20 or more per 1 m2. And to this we must add the cost of materials.

And excluding the not-so-expensive stage of finishing work can subsequently negate all efforts, not to mention the financial costs of finishing walls and ceilings.

The times when virtually the same primer was used for all types of work are long gone. And construction and repair technologies in our country are beyond last years have changed dramatically, approaching those used throughout the civilized world.

Today on Russian market There is a great variety of both dry and ready-to-use modern primers available, from which you can choose exactly what you need. When producing the composition, the type of surface being treated is taken into account ( Brick wall, concrete or expanded clay concrete blocks, metal, plaster, plasterboard, wood, plastered cement mortar surfaces, etc.), features of the room in which the primer is applied (wet or dry), as well as the method of further finishing (painting, tiling, plastering). As a rule, there are compositions used for the initial preparation of substrates (the so-called primers) and to improve adhesion between finishing layers.

Primers include film-forming substances (resins, bitumen, oils, various types of glue, etc.), pigments, drying accelerators and various additives to impart certain properties to the surface. They are produced on mineral, acrylic, alkyd and other bases.

In mineral-based soils, cement is used as a binder. Such compositions are used for initial accelerated processing and preliminary leveling. interior walls from mineral materials: plaster, concrete, lightweight concrete, brick, gas silicate and expanded clay concrete blocks.

Nowadays, universal water-borne primers with good hiding power based on acrylic copolymers are quite widespread. These compounds provide good adhesive contact with the final coating, including latex, acrylic and alkyd paints. Equally suitable for preparing surfaces made of concrete and concrete blocks, cement and cement plaster, gypsum and plasterboard, wood and its derivatives, as well as previously painted surfaces and fiberglass wallpaper.

Alkyd-based quick-drying primers are designed for primary and secondary treatment of new and previously painted wood, fiberboard and particleboard. They have good adhesion to such difficult-to-work surfaces as fiberglass, PVC plastic, galvanized steel, glass, tiles.

Among the materials with a narrow specialization, it is necessary to note moisture-proofing primers (with anti-mold and fungicidal additives), special insulating primers (prevent the detection of coating defects caused by nicotine, smoke, soot, dried water), paint-primers for ceilings and, finally, primer compositions for preparing floors.

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Internal putties

Even a relatively thick layer of primer follows the surface profile. Therefore, the geometric correctness of the walls can be achieved mainly in two ways - by applying a layer of plaster or by gluing sheet materials, such as plasterboard or gypsum fiber sheets. The final alignment of geometrically correct walls is carried out using putty, which has the property of being sanded, thanks to which the surface can be brought to a very smooth state.

All modern putties are dry mixtures mixed with water or ready-to-use paste-like substances and are divided into leveling (rough-relief) and finishing.

Rough-relief “roughing” compounds (they are also called putties of the first layer) are intended for preliminary leveling of surfaces. Such putties are applied in a layer with a thickness of 0.5 to 2.5 mm in one pass. The first layer must be sufficiently plastic so that it does not shrink when drying and not crack.

Finishing putties are used to seal minor defects, cracks, scratches and, when final leveling the surface, are applied in a thin layer - usually no more than 1 mm. Particularly thin materials are called superfinish. It is necessary to apply the finishing putty in several layers of 0.1-0.2 mm with intermediate drying. It is important to ensure that the total thickness of the layers does not exceed the maximum permissible value for a given putty (for different brands it is different and must be indicated on the packaging). Otherwise, the surface may crack.

The best modern dry putties are made on the basis of gypsum or cement and are necessarily modified with polymers, which ensures better adhesion of the material to the base, elasticity, water resistance, ease of processing and, ultimately, increasing the durability of the applied layer. Gypsum putties are used only in dry rooms and are characterized by high plasticity, whiteness, ease of application and ease of sanding. Gypsum-based compositions are especially common today. They set quickly and are quite convenient to use.

Cement-based putties are practically not inferior to gypsum putties in ease of application, but are characterized by increased moisture resistance - they can be used not only in dry, but also in wet rooms. Cement putties should be sanded 1-2 days after application, since they gain strength over a long period of time and after a month are difficult to process.

Putty mixtures are prepared immediately before work and are suitable for use for a certain time (this indicator is determined by the composition of the putty). Each manufacturer indicates in the instructions for use the shelf life of the composition from the moment of preparation until the start of setting, when its plastic properties (the ability to be evenly distributed in a thin layer) are lost.

With modern putties, the “lifetime” ranges from 5 to 24 hours. Thanks to this, you can avoid premature drying of the composition (and therefore increased consumption of materials) and are less likely to be distracted by preparing fresh portions.

Kochnev Anatoly+

Rotband plaster from the Knauf company is one of the most popular. During any repair work indoors, you always have to plaster the surfaces afterwards so that they are even and smooth. To do this, you will need a special composition that contains cement, sand and lime. But Rotband, a universal gypsum plaster, will do instead; Knauf is the manufacturer of this product. If you use such material, the labor intensity of all plastering work will be noticeably reduced.

Rotband plaster mixture is dry gypsum plaster. It is based on high quality gypsum. It is diluted with special minerals. These fillers perform a binding function. Before mixing all the substances, they are crushed. Due to this, the contact area is increased, so that the adhesion to each other between the particles and the treated wall is higher.

Knauf plaster, like other products of this company, including the Rotband brand, is fully certified and meets all established quality standards. Are there other permitting documents? Other certificates are also available. For example, from the sanitary and epidemiological services, a document on fire safety material. This indicates that Knauf gypsum plaster is completely safe for humans, so there is no risk to his health.

Rotband is a universal gypsum plaster. Before you start choosing a material, you need to decide on the shades, as there are several tones. For example, you can purchase a white compound called Knauf Gips Kuban. It is produced in the Astrakhan region and Krasnodar region. If you need Rotband 30 kg in a pink shade, then you can purchase a composition called Knauf Gips Kolpino or Knauf Gips Chelyabinsk. As a rule, the shade is not usually written on the packaging, but you can easily find out the color from the manufacturer itself.

It must be taken into account that Rotband gypsum plaster can behave differently depending on the tone. For example, if you apply a layer of gray or white, the product gradually begins to drain, which affects the appearance of horizontal waves. Plastering walls with Rotband Pink colour does not cause such problems. This has to do with the grain. The composition with a pink tint has quite large grains - 1.2 mm each, while the rest have smaller grains - only 0.5 mm each. If in the future you need to glue wallpaper without preliminary putty, then it is best to use a mixture of gray or white shades.

Versatility is one of the advantages of Rotband brand products. As a rule, such building material is used when it is necessary to level surfaces made of cement, brick, and concrete. For example, Knauf facade plaster is very popular. In addition, this product can also be used for plasterboard partitions. This type of material is used only for interior work.

Plaster Knauf Rotband performs the following functions:

• technical – prevents the appearance excess moisture indoors and controls the temperature, and thanks to the application of such material the surface becomes completely smooth, which is suitable for the following finishing work;
• protective - that is, you need to insulate the walls from the outside, protect them from environmental factors;
• decorative – the material creates a beautiful appearance of the surface.

The description of the material includes other characteristics that must be read in advance before purchasing the product.

Specifications

If Rotband plaster is selected, specifications of this material are as follows:

1. Consumption per 1 m2 is approximately 8.5 kg if the layer is 1 cm thick.
2. You will need approximately 19-20 liters of water per 30 kg of dry composition to mix it.
3. The product should be used within 25 minutes of its preparation.
4. For walls and ceilings, it is recommended to make a layer with a thickness of 0.5 to 5 cm, and for the ceiling this figure is approximately 0.5-1.5 cm.
5. The plaster hardens in about a week, but the length of the period depends on the conditions in the room.
6. The maximum particle size is up to 1.2 mm.
7. The strength indicator is more than 2.5 MPa.
8. When the substance is in a solid state, the density is 950 kg per cubic meter. m.

You can purchase products in packages of 5, 10, 25 and 30 kg. If the packaging is not damaged, storage is allowed for up to 6 months.

In addition, Knauf gypsum plaster has the following properties:

1. High resistance to frost, steam and moisture. The indicator is at least 75 cycles. Thanks to this, the composition can be used in corridors, bathrooms and other places. But it must be borne in mind that if the humidity is too high, then water can be absorbed into the composition on the walls and ceiling. And if the composition dries out excessively, it can affect the microclimate in the room.
2. Water retention. Due to the fact that the surface is porous, the plastered ceiling will absorb water from the walls. As the solution hardens and loses moisture, the quality of the final work may decrease.
3. Adhesion. This assumes that the material adheres well to various surfaces: concrete, brick, wood. It is also recommended to use this material for drywall. In the future, cracks do not form and shrinkage does not appear.
4. Elasticity. Knauf rotband fits perfectly on various surfaces, and the layer comes out very even. The substance does not stick to instruments. At the base, all voids are gradually evenly filled. Plasticity is achieved through special additives that belong to the group of modifiers.

In addition, the material has other useful properties.

Advantages and disadvantages

1. Environmental friendliness. Gypsum is considered a natural mineral. It is of natural origin and does not contain any substances harmful to humans and the environment.
2. Easy to use. The use of products of this brand is possible not only for specialists, but even for beginners who do not yet have experience in such work. The packaging always contains instructions for use, where you can see how to dilute the product, how to cover surfaces with it, as well as the consumption of gypsum plaster.
3. Versatility. Thanks to products from Knauf, you can get a smooth surface that does not need to be puttyed or subjected to other additional processing.
4. Drying speed. If cement plaster hardens in about a month, then gypsum plaster will take only a week. And this significantly reduces the period allocated for all construction work.
5. Hygroscopicity. Dry plaster allows air to pass through its layer, which prevents dampness and fungus from developing and has a beneficial effect on the microclimate in the room.
6. Ability to retain moisture. Thanks to this, the layer will not delaminate or crack.
7. Many surface design options. Using this material you can create various decorative elements, make the ceiling and walls textured.

Rotband plaster, the consumption of which is approximately 8.5 kilograms per square meter(depending on the thickness of the layer), it has proven itself to be excellent. But in addition to the positive features, there are also some disadvantages that also need to be taken into account. These include the fairly high cost of production. In general, this product belongs to the middle price segment, but other manufacturers indicate that there are many cheaper analogues. But this is a personal matter - how much money to allocate for plastering.

Another disadvantage is that the plaster shrinks. In general, this point is controversial. The manufacturer indicates that the layer will not crack or shrink, but if you do not follow the technology when mixing the composition and applying it to the surface, deformation is quite possible.

How to apply on surfaces

Many people do not know how to plaster walls with Rotband correctly and in compliance with the technological process. There's really nothing complicated about it. If Rotband plaster is selected, the instructions contain all the necessary nuances. First you need to figure out how much composition is needed to treat all selected surfaces. In general, Rotband plaster has different consumption per 1 m2. This depends on the thickness of the layer and the surface on which the composition is applied. If the layer is 1.2 cm, then approximately 8 kg will be needed per 1 m2. That is, for 4 m2 you will need the entire package weighing 30 kg. To then calculate how many such bags are needed, you need to calculate the surface area and divide the resulting number by 4.

Be sure to prepare the walls before applying the composition. To do this, you need the following tools: metal slats, brushes or rollers for priming, a building level, metal beacons, a mixer or drill, a hard sponge and a wide spatula. First you need to clean the previous coating from the walls. Remove greasy stains from concrete walls. The surface should be left as smooth as possible. If there are metal elements, they should be processed special compounds with anti-corrosion properties. After this, prime the surface and wait until the layer dries. For aerated concrete and brick, use Rotband Ground or Grundirmittel. If the base is made of polystyrene foam, cement or concrete, then Betonkontakt is suitable. Be sure to install 6 and 10 mm beacons. It is by following them that a layer of plaster is applied.

For 30 kg of Rotband composition you will need approximately 18 liters of water. The liquid should not be hot. Otherwise, the mixture will quickly set and lumps will form inside. It will have to be quickly applied to the base, otherwise it will dry right on the spatula. Add water gradually. Mix the composition with a construction mixer or drill. The thickness of the composition should resemble sour cream. Then leave it for 10 minutes before stirring again to improve elasticity.

Apply the composition at temperatures within +5...+30°C and humidity not more than 60%. If you have no experience in such work, then it is best to use a wide and long spatula. Apply the substance at a time at a distance along the beacons and a height of up to 1 m. Then level it according to the marks. Make zigzag movements. Excess should be put away in a bucket or somewhere else on the wall. 50 minutes after finishing the work, the layer is already quite dense, but has not yet dried out, so it can be leveled. If you continue to use tiles, then no additional work you won’t need it, but to hang wallpaper you will also have to scrub the layer with a stiff brush, after wetting it with water.

Conclusion

Rotband plaster (30, 50 and 10 kg) from Knauf is a very popular product due to its technical characteristics and versatility. You can choose material in pink, gray and white shades. All work can be carried out independently, since the products do not create additional problems. When choosing a material of this brand, you must take into account all the features, advantages and disadvantages.

The main requirements for building mixtures for leveling ceilings and walls are plasticity, absence of cracks during shrinkage and high drying speed. Quite a few such mixtures have now appeared, but Knauf Rotband gypsum plaster has gained particular popularity - the technical characteristics of this material meet the highest requirements.

The main production of Rotband plaster is located in Germany, but there are subsidiaries in our country. They release this and many others building mixtures under the Knauf brand for more than 20 years.

Compared to other similar domestically produced materials, it is somewhat more expensive: the price for a bag weighing 30 kg is about 400 rubles. But the additional expenses are completely justified, since Rotband is recognized as one of the most durable, high-quality and easy-to-use plasters suitable for leveling walls and ceilings.

Technical characteristics of Rotband plaster

Before purchasing and using any material, you must obtain complete information about its properties and characteristics. This will help you make the right choice, indicate the consumption of Rotband plaster per 1 m2, and calculate the time it will take to do the work yourself.

Advice. Be sure to ask the seller for a certificate for Knauf Rotband plaster. Only if it is available can you count on the material meeting the declared characteristics.

Advantages

To an ignorant person, the technical characteristics will tell almost nothing. He needs a detailed description of the material with all its advantages and disadvantages, as well as instructions for use.

So let’s see what both finishing specialists and customers like so much about this plaster:

• Possibility of leveling differences up to 5 cm deep in one pass;
• Even such a thick layer does not cause shrinkage cracks when drying;
• The surface is quite smooth and does not require finishing putty. You can glue wallpaper on it;
• Uniform drying without sudden loss of moisture even at high temperatures and on porous substrates;
• Increased setting time of the working solution compared to other gypsum mixtures;
• Excellent adhesion to any substrate due to the introduction of polymer additives into the mixture, which allows the composition to be used for leveling ceilings;
• Low consumption of Rotband per 1 m2 - cement or cement-sand plaster is consumed half as economically;

• Vapor permeability – walls plastered with gypsum mixture can “breathe”, maintaining a comfortable microclimate in the room;
• Environmental friendliness - Knauf Rotband gypsum plaster does not contain substances harmful to human health.

Let's summarize. The described material is excellent for leveling indoor surfaces. Compared to cement plasters, it is lighter in weight, therefore it places less load on walls and ceilings and requires less transportation costs.

For leveling, applying just one layer is often sufficient. The solution is applied and distributed easily, creating a smooth surface that does not require puttying. The cost-effectiveness of plaster deserves special attention: one 30-kilogram bag is enough to finish 3.5 sq.m. surface with a layer of 10 mm.

It is possible to apply a thicker layer without the risk of cracks appearing after the solution dries, which makes it possible to eliminate serious defects and deviations from the level. If they are greater than the maximum permissible layer thickness, then leveling is performed in several layers.

For reference. Due to the high plasticity and elasticity of the mixture, it is easy to work with. For one work shift one person can plaster up to 20 sq.m. taking into account the time spent on preparatory work.

Rules of application

It is hardly worth once again describing in detail the entire plastering technology; you can study it by reading other materials on the site. But there are some points worth focusing on.

Preparing for work

In addition to such standard measures as cleaning the surface from crumbling areas, dirt, dust and greasy stains, before using Rotband it is recommended to prime it using primer of the same brand.

So:

• Highly absorbent substrates are treated with Knauf Stuc primer (see Primer of walls and everything on this issue);
• Dense, smooth and low-absorbent substrates (for example, concrete) are coated with Knauf Betokontakt primer with the addition of crushed quartz sand, which gives the surface roughness.

This is important: in no case should this stage be neglected when plastering ceilings if you want the coating to adhere to them reliably.

If the base for Rotband is cement plaster, then it must be dry: leveling can begin no earlier than four weeks after its application. The fact is that when cement dries, its volume decreases much more than gypsum, and if it is not allowed to settle completely, cracks will appear on the gypsum coating.

The main work begins only after the primer has dried.

Mixing the solution

Since the viability of the finished solution is no more than half an hour, it is prepared in such a quantity that it will be completely consumed during this time. Consider your productivity and number of employees.

If you are plastering alone, mix no more than 10 kg of mixture at one time. That is, if you have Knauf Rotband plaster 30 kg, then this will be a third of the bag. The proportions of water and powder are indicated on the packaging.

Advice. Use only cold water. The warmer it is, the faster the mixture will harden.

To mix, you will need a drill with a special mixing attachment. After the first stirring, the solution is allowed to stand for a couple of minutes, after which it is stirred again and immediately begins application.

Application

Plastering walls with Rotband is done in the usual way. The solution is thrown onto the wall and leveled with a wide spatula. Or, if lighthouse plaster is used, a long rule.

Protection comes first external corners, installing special perforated galvanized iron profiles on them. They are attached with the same mortar that will be used to plaster the walls. The vertical position of the profiles during installation is constantly monitored by a long building level.

The thickness of the plaster layer is limited to 40-50 mm. If a thicker layer is needed, the solution is applied in two or three steps, without waiting for the previous layer to completely dry.

• If you want to get a textured surface for painting, you have this opportunity. Decorative plaster from Rotband is made over a freshly applied layer; the texture is created using stamps, a stiff brush, decorative rollers and other devices.

Note. In this case, when preparing the solution, it is necessary to add 100 g of PVA glue to it for each liter of water. The glue is introduced into the once mixed mixture before mixing again.

• If needed Smooth surface under wallpaper, after drying, the surface is first corrected with a spatula, which cuts off bumps and drips, then sanded with a grater.

• Before subsequent painting, the plastered base must be covered with finishing putty.
• For facing with ceramic tiles or artificial stone The surface does not need to be sanded or puttied.

You can start puttingtying, wallpapering, painting and other types of finishing only after the plaster has dried. Depending on the thickness of the layer, this may take from 3 to 15 days.

Conclusion

Very often, the desire to save money leads to even greater expenses when low-quality coating begins to peel off the walls along with the decorative coating. This will not happen with Rotband gypsum plaster if all technological requirements are met when working with it.

Watch the video in this article and see for yourself how easy it is to work with this material and how high-quality the result is.

Perform plastering and finishing walls can be applied in several ways, one of which involves the use of a German universal mixture based on the Knauf Rotband gypsum binder. Rotband plaster material has been sold and used on our market for decades, and during this time it has earned a huge number of positive reviews and interesting questions.

What is gypsum plaster from Knauf?

Specialists of the German company Knauf, traditionally producing high-quality dry plaster, still keep secret the main components and the method of producing gypsum mass. By law, they are only required to confirm the sanitary safety and environmental friendliness of gypsum plaster, but have the right not to disclose production technology, which they regularly do. As long as gypsum rotband is used, questions arise about its composition.

It is only known that the dry plaster composition of rotband includes:

1. Gypsum mass with additives that improve water adhesion and prevent shrinkage:
2. Plasticizers that increase the fluidity and hardness of the gypsum surface after setting;
3. Dust-like inert filler based on silicon oxide with a fine-crystalline structure.

For your information! As of today, the manufacturer has not announced how many and what components are included in the Knauf rotbands, although many imitations of dry plaster made of gypsum, ground sand and acrylic resin are sold on the market.

To prepare the finished Knauf Rotband gypsum mixture with your own hands, you just need to add clean water, exactly as much as the instructions require, and mix the mixture with a mixing attachment. For a kilogram of dry gypsum rotband powder, 0.6 liters of water are consumed. After activation and mixing with a mixer, the rotband gypsum mass remains in working condition for another 40 minutes, the plaster dries quite quickly. During this time, it is necessary to complete most of the finishing operations. How long exactly the Knauf rotband material will set depends on the temperature, air humidity and the presence of a draft.

The advantages of the universal plaster mass “Knauf” rotband over cement plasters can be formulated in four points:

• High quality surface, absence of deformation and cracking of the gypsum mass, subject to the rules for preparing the solution specified in the instructions;
• Almost halved consumption of gypsum plaster compared to sand-cement compositions;
• The versatility of Knauf rotbands allows you to use the same mass both as plaster and putty.
• Environmental friendliness and safety. The use of gypsum binders, according to the developers, makes the room more comfortable for human occupancy. In addition, gypsum material has better thermal insulation, dries faster and is resistant to open flame.

They produce dry gypsum mixture Rotband "Knauf" in soft packaging weighing 30 kg. The name gypsum universal plaster is often confusing when, upon opening the bag, a person sees in front of him a gray mass resembling cement. In fact, the dry mixture of Knauf rotbands has long been produced not only in Germany, but also in a number of CIS countries, including the Russian Federation. Therefore, the dry mass can be gray, white or pink. As the plaster dries on the surface of the walls, it gradually becomes lighter and becomes almost white.

There are a lot of fake Knauf rotband plasters sold on the market, so you can easily get into trouble, not knowing how to distinguish a fake from the original.

Advice! When packaging ready-made mixtures on the line, the date and date are applied to the packaging by a mechanical automatic machine. exact time sealing the bag. If on a pallet with calibrated plaster there are packs of same time packaging, then, most likely, this is a fake “Knauf” Rotband.

Ready-made mixtures can be stored in packaged form for up to six months; dry plaster cannot be stored in an open container for more than a week. Instructions and storage rules are always given on the packaging of gypsum plaster.

Practical use of rotband gypsum mixture

Using ready-made plaster, you can finish almost any building material, used for arranging the walls of residential and auxiliary premises. You can plaster brick, concrete, foam block and even polystyrene foam without reducing the strength or quality of the surface. But in each specific case, it will be necessary to take additional measures to improve adhesion to the base of the wall.

The use of gypsum plaster for wall finishing involves the use of other Knauf products in combination with rotband. Before applying plaster to brick, foam concrete, or any porous structure, use Knauf Grundiermittel primer; for concrete walls and polystyrene, use Knauf Betokontakt deep penetration composition.

Preparing the walls and applying the base layer of gypsum plaster

Initially, the wall is cleaned of dust and remnants of masonry mortar. To do this, you can use a construction hammer and a dry brush. After cleaning, the stone or concrete surface is primed in accordance with the instructions. After treatment, the surface of the walls dries for at least a day.

At the next stage, the installation of galvanized steel beacons is carried out, along which the surface of the plaster will be leveled. The technique for installing beacons and leveling plaster is well described in the video:

The distance between the beacon strips should not exceed ¾ of the length of the rule. Beacons are attached to a primed wall using a small amount of plaster mixture and leveled using a building level and a stretched line or laser level gauge. In addition, a fishing line or laser will allow you to calculate how much ready-made rotband gypsum mass will be needed for arranging the plaster.

After the wall is prepared, you will need to prepare a gypsum plaster mixture. The most rational way to prepare universal rotband plaster and gypsum finishing material “Knauf” finish is shown in the video:

To prepare the gypsum mass, you will need a Knauf rotband plastic container for 30-35 liters, 18 liters of water and one package of dry universal plaster. Typically, the composition for plastering a wall is prepared as follows:

• 30% water and a small amount of dry mixture, 4-5 kg, are added to the container, mixed with a trowel;
• Next, the rest of the water is added to the tub and all the gypsum mass remaining in the bag is poured out;
• Beat the mixture for five minutes using a mixer attachment until creamy;
• The finished plaster mixture sits for another five minutes, and you can begin finishing the walls.

The finished gypsum mass has the consistency of semi-liquid sour cream; it is scooped onto a spatula in portions of 400-500 grams and forcefully thrown onto the wall in rows from bottom to top.

Advice! Considering the fact that the plaster dries quite quickly, the gypsum mass is prepared exactly as much as will fit on a strip 1 m wide and 2.5 m high.

In order to calculate how much mixture is required for plastering a wall, use the following ratio: for plaster 10 mm thick, prepared from a 30-kilogram bag, the plaster mass is enough for 3.1-3.3 m2. The manufacturer recommends applying gypsum plaster with a thickness of 5 to 25 mm. In practice, the rotband held up perfectly on the walls even with a layer thickness of 1 to 40 mm.

Immediately after finishing throwing the plaster mixture onto the wall, using an H-shaped rule, the mixture is pulled up and at the same time leveled along the installed beacons. The planks should not extend to the surface of the plaster, otherwise the wall will become ribbed after drying.

If it is difficult to work with beacons, you can refuse to use them altogether, as in the video:

The quality will be slightly lower, but you can finish almost any surface with rotband. In this case, corner mesh profiles made of plastic or aluminum installed at the corners of the walls are used as beacons. Laying technology without the use of beacons is a little more complicated and requires good visual memory.

Initially, a rough layer of Knauf plaster is laid on the wall, after which the rule is to measure and look for depressions on the treated surface. With the second layer, the defects are rubbed with a rotband, and the excess is removed using the rule. On the third layer, the plaster is smoothed with your own hands in the usual manner.

Leveling and filling the applied plaster

Approximately 15 minutes after the first treatment with the rule, the rotband plaster dries, stops floating down, and it can be leveled with a fine trapezoidal rule or a wide trowel.

After the surface has become smooth, but slightly rough, they proceed to smoothing the Knauf Rotband plaster with a dense sponge material glued to the sole of the trowel. After this treatment, the surface becomes soft and is additionally polished with a wide spatula. The polished layer dries for 20-24 hours at room temperature. For extreme cases, at a minimum temperature of 5 o C, the rotband material dries for several days. On such a wall you can glue wallpaper yourself or apply decorative plaster.

After drying, the wall is additionally treated with Knauf Grundiermittel primer, which dries for at least another 10 hours.

The finishing composition for finishing is prepared using the same method as the universal gypsum “Knauf”. Initially, add a small amount of the finishing mixture to a container of water with your own hands, as determined by the instructions. There should be a small amount of water left on the mirror. The poured dry mixture with water is left for 5-10 minutes so that the gypsum is saturated and watered with water. Next, mix the mixture with your own hands for 5 minutes until it becomes creamy, then leave for another 5-10 minutes to stabilize the mixture. Included ready mixture They use substances that prevent the mixture from separating and separating its individual components. Such substances dissolve in water much worse than ordinary gypsum or surfactants, so it is advisable to pause before mixing so that all components of the rotband dissolve evenly.

The procedure for applying the Knauf finishing compound to the wall is similar to the scheme for working with the first sublayer. After completion, the plaster material is allowed to dry and is also sanded with a wide stainless steel spatula.

Conclusion

The result is an almost smooth mirror surface. The finished, polished plaster dries for at least 5-7 days at normal humidity and air temperature. Upon completion, such plaster can be finished with decorative compounds, but it is easier to paint the wall yourself. Gypsum composition"Knauf" rotbrand can be plastered on surfaces made of plastic or foam polystyrene. In this case, it is necessary to carry out additional treatment with a concrete contact primer and use a reinforcing plastic mesh.

Almost every home craftsman or novice plasterer, not to mention renovation professionals, is well acquainted with the universal gypsum plaster Knauf Rotband, which has remained one of the leaders for a long time construction market. The popular leveling agent can be characterized as a strong, highly reliable coating that does not fail, which is confirmed by many years of practice and customers of repairs of various categories.

The use of Rotband plaster allows you to perform high-quality and durable interior decoration objects for various purposes– multifunctional residential complexes, apartments, private houses and offices.

Peculiarities

The production policy of the German brand Knauf is based on the principles of a systematic, integrated approach, resulting in products that can solve any problems arising in the process of repair and finishing work. This is what all Knauf products, without exception, are famous for, the quality of which is recognized and appreciated by the global community of users.

In the production of Rotband plaster mixtures, the latest innovative developments are used, modern equipment and high quality raw materials.

Traditionally, Knauf leveling compounds are made with a gypsum binder base, the addition of modified polymer additives that increase the adhesive properties of the mixture, and also reduce the intensity of setting of the working solution and fillers in the form of chalk, limestone or quartz and expanded clay sand.

New family Knauf is the company's main approach, which has a number of advantages. The main advantage is the ideal compatibility of building materials with each other. In addition, they can not only complement each other, but also, if necessary, replace each other. Today the new Rotband Knauf family is represented by four products:

• primer composition Knauf Rotband - primer for gypsum plaster mixture;
• universal gypsum plaster Knauf Rotband;
• thin-layer leveling mixtures are Knauf Rotband Finish and Knauf Rotband Pasta Profi putties, which are used to prepare surfaces for decorative finishing.

Experienced builders recommend using products from the same manufacturer during renovation, which completely eliminates the risk of conflict between finishing materials, which means you don’t have to look for alternative solutions, wasting time and money.

Knauf specialists took care of solving this problem by creating a whole line of materials with which you can perform the entire cycle of pre-finishing work.

Advantages and disadvantages

Due to the use of gypsum, which is considered an ideal material for the production of plaster mixtures, gypsum leveling coatings are purchased whole set attractive characteristics, namely:

• environmental safety, since gypsum stone is pure material of natural origin, excluding the content of impurities harmful to human health;
• plasticity, thanks to which the compositions are easily applied and quickly distributed over the working surface. Therefore, not only professional builders, but also those who have just begun to comprehend the intricacies of finishing can work with them;
• provide the creation of a very smooth, pleasant-to-touch surface that does not need additional putty, but can be immediately painted, wallpapered or covered with decorative plaster;
• ability to quickly absorb moisture and release moisture. Rotband actively participates in regulating the humidity conditions in the room and contributes to the formation of a favorable and comfortable microclimate;

• hygiene. The product itself has a porous structure and, accordingly, the ability to drain excess moisture. This coating protects walls and ceilings from mold;
• excellent heat and sound insulation properties;
• high adhesion to substrates made of various materials;
• excellent decorative qualities, which makes textured finishing of wall and ceiling surfaces available;
• eliminate the formation of cracks even when applying a thick layer;

• consumption rates compared to traditional plaster mixtures based on cement and sand are half as low;
• the ability to apply a maximum layer of 5 cm with one plaster coating, excluding preliminary spraying. If necessary, thicker layers can be applied in a couple of approaches;
• versatility in use - the mixtures are suitable for simultaneous plastering with putty, making decor, repair work and restoration activities;
• have a high water-holding capacity, due to which the working solution eliminates delamination, cracking and dehydration when applied to porous substrates that actively absorb liquid, as well as when working in conditions high temperatures;

• fire resistance similar to concrete;
• high drying speed. Compared with cement plaster, drying within a month, the composition with a gypsum base will dry in a week;
• Unlike cement plaster mixtures, Rotband weighs much less, therefore, the load on the treated surfaces will be lower. Due to its light weight, it is easier and cheaper to transport.

Despite the impressive list of advantages and long-term popularity of Rotband plaster mixtures, they also have disadvantages, although quite controversial, since they were identified by users, whose opinions are always subjective.

So, buyers consider several features to be disadvantages.

• High price. Although this plaster is classified as a building material in the mid-price category, according to opponents of this brand, there are many analogues of other brands that have similar performance characteristics, but their purchase is much cheaper.
• Probability of coating shrinkage. Knauf guarantees that its product is resistant to cracking regardless of the thickness of the applied layer. As practice shows, the material shrinks or becomes cracked for three reasons: when the technology for preparing the mortar mixture is violated, the working solution is applied incorrectly, or a fake is encountered.

Today, markets and even large construction stores are replete with low-quality imitations of popular plaster, which contains gypsum, ground sand and added acrylic resin.

The secret of the composition

The Knauf company, which produces high-quality plaster mixtures, still keeps secret information about the main components of their composition, and does not intend to make the subtleties of the manufacturing technology of its leveling finishing coatings public.

The law only requires manufacturers of building materials to confirm sanitary safety products and providing evidence of the environmental friendliness of the components used, while manufacturing companies have the right to protect the subtleties of production as trade secrets, and to protect monopoly rights to general characteristics, go through the patenting procedure. Therefore, the secret of Rotband's composition is known only to Knauf.

Anyone interested in this issue must be content with generally known information about the components of plaster, presented:

• gypsum binder as a base;
• functional additives that help improve the setting of the mortar mixture and prevent shrinkage;
• plasticizers to increase the viscosity of the solution and accelerate the transition of the mortar mixture to a solid state;
• dusty inert filler, the main component of which is silica, which has a fine-crystalline structure.

Knauf does not yet intend to disclose in what proportions and exactly what ingredients are contained in Rotband.

How to distinguish a fake?

Due to the popularity of the Rotband plaster mixture, the market was expectedly overwhelmed by an avalanche of counterfeits. Negative consequences A similar phenomenon is the likelihood of discrediting a building material with a subsequent decrease in demand for it. In order to distance itself from low-grade counterfeits, Knauf quickly took measures to protect the reputation of its product.

As a first level of protection, they began to package the plaster in original bags, which are made using corrugated paper, and they are made according to the company’s special order. The second level of protection was the use of second-by-second marking, that is, each bag contains information about the exact time of its production, down to seconds, which eliminates the possibility of the existence of two packages with identical markings. And finally, the presence of a hologram that changes color when rubbed serves as the third level of protection for the originality of Rotband.

Specifications

All products for repair and finishing produced under the Knauf brand are certified, their quality is confirmed by a certificate of compliance with GOST requirements. Product safety is confirmed by a fire certificate and a sanitary-epidemiological certificate. Therefore, you can absolutely safely decorate any residential premises with Rotband plaster mixtures, without fear for the health of the residents.

The main operational properties of the leveling coating are the following:

• description appearance– powdery mixture of white, pinkish, gray depending on what natural impurities the gypsum stone contains. This parameter does not affect the performance characteristics of the product;
• operating temperature range is from +5 to +30ºС;
• permissible values ​​for the thickness of the leveling layer for walls vary from 5 to 50 mm, for ceilings - from 5 to 15 mm. The recommended thickness is 10 mm;
• the consumption rate for an applied layer thickness of 1 cm is 8.5 kg/m²;
• the volume of the mortar mixture obtained from 30 kg of dry product is 38–40 l;
• maximum sizes of filler fractions – 1.2 mm;
• the maturation period of the mortar mixture is from 5 to 10 minutes;

• the viability period of the working solution in an open tank is from 20 to 25 minutes;
• The drying period of the coating applied in a layer 1 cm thick is from 45 minutes to 1 hour;
• complete drying time - the mixture gains brand strength in 7 days;
• the density of the hardened coating is about 950 kg/m³;
• compressive strength – minimum 25.49 kgf/cm²;
• bending strength – minimum 10.19 kgf/cm²;
• packaging - the mixture is packaged according to paper bags different volumes 5, 10, 25, 30 kg or plastic bags weighing 5 kg;
• shelf life - the mixture is stored in an airtight bag for six months.

The most important technical characteristics of the plaster mixture for the finisher are the pot life of the mortar mixture and the time during which the finishing layer dries. Since in the case of Rotband the “survival” time of the working solution is limited to 25 minutes, it is important to pre-calculate the volume of the mixture that can be produced within the specified time, and it is worth taking into account the pace of work.

When you need to plaster the walls, you don’t have to worry about this issue. When finishing small area walls or ceilings, problems may arise with the accuracy of determining the required volume of solution, since this is quite difficult to do.

In such situations, professional builders recommend finding places in advance to lay unused mortar mixture.

Application area

The purpose of Rotband gypsum plaster is high-quality internal manual finishing of vertical surfaces and ceilings with hard types of bases: concrete, brick, plastered cement leveling coatings. Along with the listed materials, this product is allowed to plaster building structures made of polystyrene foam blocks and cement bonded particle boards.

The manufacturer recommends treating smooth concrete wall or ceiling surfaces with Rotband. They can be used to decorate both dry and wet rooms (kitchens, bathrooms), provided that the plastered surfaces do not come into direct contact with water.

To achieve ideal surface quality for decorative coatings, after Rotband it is advisable to use the dry composition Rotband Finish and or ready-made Rotband Pasta Profi.

Consumption

The consumption of gypsum plaster mixture may vary, depending on several factors, such as:

• type and original condition of the working surface;
• quality of base preparation;
• thickness of the leveling layer.

As a starting point, it is most convenient to take the consumption value of the leveling coating based on the fact that 8 kg of mortar mixture is required for 1 square, provided that a finishing layer 1.2 cm thick is applied. That is, by simple calculations it can be established that a standard 30 kg Rotband bag Enough to cover 4 squares of walls or ceiling. To calculate the required number of packages of plaster mixture, S of the base to be plastered is divided by 4.

How to prepare the mixture?

Before preparing the working solution, be sure to read the instructions on the back of the Rotband bag. One 30-kilogram package of leveling compound requires about 18 liters of liquid. To mix the mortar mixture, pour the required volume of water into a capacious container and pour the powder in parts, mixing the contents using a construction mixer to obtain a homogeneous mass without lumpy inclusions.

To determine the desired consistency of the plaster, it is recommended to scoop up a small amount of mortar mixture with a spatula or trowel, and then turn the tool over. When the solution “sticks” to the metal, it is suitable for use.

If necessary, the dry mixture can be added to the tank, or water can also be added. Having added the components to the solution, wait for 5–6 minutes, allowing it to mature, and then finally mix the plaster mass. It is worth keeping in mind that directly in the process of working with plaster, adding portions of powder or water to the mortar mixture is strictly unacceptable.

Terms of use

The quality of finishing in private or industrial construction largely depends on compliance with basic rules familiar to everyone who has ever made repairs using leveling coatings.

Preparatory work

The use of Rotband plaster mixture implies mandatory high-quality preparation of working surfaces. Requirements for the base: dry, free of old finishing coating and dirt, and dust-free. According to the instructions, it is necessary to get rid of all obvious protrusions on the walls or ceiling, and use anti-corrosion compounds to protect metal parts.

When plastering a porous base characterized by active absorption of moisture such as aerated concrete, gypsum fiber sheets, ceramic or silicate bricks is to be done, the working surface is treated with the proprietary Knauf Tiefengrund primer manually with a roller or spray gun. Substrates with low water absorption ( polystyrene foam blocks) pre-treatment with Knauf Betokontakt is mandatory, and only then can you begin plastering Rotband.

How to install beacons and corner profiles?

The Rotband technology for plastering wall surfaces using beacon profiles has a number of features.

• Installation of beacons. On the wall, in increments of 0.3 m, vertical intermittent strips are formed from individual sculpts of a thick mortar mixture, which are then pressed into the beacon profiles. Then they are aligned in one plane.
• When installing beacon profiles, it is recommended to place them at such a distance from each other that the length of the rule exceeds it by 15–20 cm.
• Corner profiles are covered with moldings of a mortar mixture with inside in increments of 0.3 m.

When installing profiles in the corners, they are first fixed in the center, and then gradually pressed, moving towards the edges, and combined into one plane with the beacon profiles on the walls.

How to apply and level?

As already mentioned, it is important to have time to prepare the mortar mixture within a certain period of time - a maximum of 25 minutes from the moment of its preparation. Ceiling surface covered with plaster using falcon – construction tools in the form of a square platform made of wood, metal or polyurethane, equipped with a handle. You can also plaster Rotband walls with a construction falcon or by applying the mortar using a trowel, and then level the moldings using a rule to get a flat surface.

Creating a thick layer of plaster mixture is done in two approaches. The first step is the formation of the first layer, which, after being applied to the working surface, is profiled with a plaster comb until the composition begins to set. The second stage - applying the next layer - can be started only after a day.

Finishing building structures made of CBPB (cement-bonded particle boards) or polystyrene foam blocks requires the use of a reinforcing mesh with a mesh size of 5x5 cm. It is fixed to a polyvinyl acetate emulsion or the wall is covered with a thin layer of plaster mixture, and then the mesh is pressed in, smoothing it with a spatula so that it does not start to bubble.

When the mesh is dry, it is sanded, dusted, primed and plastered. The setting time of the applied mortar mixture is about an hour, after which it is leveled with a metal spatula or lath, bulges and sagging are cut off, and depressions and grooves are filled with the plaster mixture. Slopes or corners are removed from uneven areas using a special plastering plane. A wall with such a layer can already be tiled.

How to rub and smooth the surface?

For coloring, application decorative plaster or taping with trellises, preparing the plastered surface requires a different approach. The applied mortar mixture should be allowed to sit for about 15 minutes, then moisten it with a wet rag, and then begin to rub, using your choice of a felt float or a very hard sponge to smooth out the marks left by the lath.

After waiting another 15 minutes, the plaster layer will need to be smoothed using a wide spatula. When the walls are completely dry, you can move on to finishing decorative coatings- wallpaper or paint.

• When you plan to glue trellises in white or light pastel colors, it is better to treat the plastered walls before gluing them with a white finishing putty.
• To give the walls or ceiling a spectacular gloss, the applied working solution is thoroughly moistened after 3–3.5 hours, and then smoothed with a wide spatula or grater. The advantage of this procedure is that there is no need to putty Rotband, since the surface prepared in this way can be painted.
• This leveling finishing coating can be used as a starting putty due to its high strength properties and excellent adhesive ability. However, Rotband as a putty is compatible only with finishing compounds with a gypsum binder base.
• The Rotband plaster composition, known for its high adhesive properties, adheres perfectly to everything it comes into contact with. Therefore, after completing the work, you cannot put off washing the tools “for later.” If you don’t do this right away, then you won’t be able to get rid of the dirt with water, but will have to remove it mechanically, spending a lot of time and effort scraping off the stuck solution.
• Experienced plasterers always keep a bucket of water ready to wash the mixer. Each time, after mixing the solution, the spiral attachment is left in the drill, dipped in a bucket of water and washed with the drill turned on, which is very convenient.
• In construction, at the stage of rough work, craftsmen often use process water, and if there is no water supply at the site, they use well water or collect it from the nearest reservoir.

It is extremely important to dilute dry plaster mixtures clean running water, since as a result of its stagnation, it forms favorable environment for the proliferation of microorganisms that can provoke the development of mold on plastered surfaces.

Comparison with other brands

The Knauf line of dry gypsum plaster mixtures, in addition to the Rotband under consideration, is represented by several more types of leveling coatings with polymer additives. This:

• Knauf Eisberg is a white composition recommended for use as a light base for topcoats.
• Knauf Goldband, which well levels rough walls with obvious differences in height and other serious construction defects.
• Knauf HP Start– this mixture is used to create a leveling starting layer, the thickness of which varies from 10 to 30 mm. This coating helps to remove construction flaws with height differences of a maximum of 1.5 cm.

Any of the leveling coatings, like Rotband, can be used to perform interior repair and finishing work in rooms where the humidity level is normal. In addition, they are suitable for finishing wet areas– bathrooms and kitchen spaces, if direct interaction of plastered surfaces with water is excluded.

However, in the case of selecting gypsum plasters, the main criterion for choosing a suitable mixture is the scale of repair and finishing work. If the renovation is planned to be done in one room or small apartment, then it is wise to purchase a mixture for plastering by hand. This can be a Rotband or Goldband if the walls are too uneven, which it does very well. When you plan to wallpaper a room with light wallpaper, you should definitely opt for Knauf Eisberg white light, so as not to worry about the possibility of unsightly gaps forming through light-colored canvases.

So, in the range of Knauf plasters you can find a product tailored to your own needs to solve problems of any complexity, regardless of the level and scope of the repair.