Knauf gypsum plaster: advantages, main differences from analogues, use

Origin of Knauf gypsum plaster

An integral part of repairs and any construction is plastering. The importance of plastering work in any house is difficult to dispute, because the durability and practicality of the entire building as a whole significantly depends on this type of work. This process is very important, since it largely determines how the room will finally look. a huge number of offers on the building materials market . The price segment of these offers is also significant; you can find an option for any budget. However, you need to remember that the stingy pays twice, and cheap raw materials can greatly ruin your nerves both during the work and in the final result.

Wall plaster is designed to protect the walls of a building from the negative effects of the environment. It also ensures compliance with sanitary and hygienic standards in both residential and non-residential premises. It is also worth noting that this material perfectly prepares walls for further wallpapering or laying tiles. You can simply use decorative plastering, which has come back into fashion in recent years.

The choice of material must be approached carefully; the price must correspond to the quality. Quality is tested by time. In our country there is a product that corresponds to the price-quality ratio, this is Knauf plaster . It is produced by a well-known German company. Production facilities are located in Russia, which significantly reduces the cost of this material.

The fact that production is located in our country does not mean that the quality of the material is lower than European. No, the production is state-of-the-art and controlled by German specialists. Products manufactured by Knauf are certified and meet all environmental safety standards. And the quality of the product itself is evidenced by a lot of positive reviews left by experts. In addition, the quality is so high that even an ordinary person without special training can use it in construction at home.

Basic properties of the building mixture

When you go to any hardware store, you can be sure that when asked about choosing a plaster, one of the seller’s first suggestions will be “Knauf”. This building material has won the trust of not only a wide range of consumers, but also entire chains of construction stores.

The main properties of plaster also correspond to this choice:

High adhesion (high adhesion to various surfaces) of plaster;
Various mineral additives increase service life;
The quality of the mixture allows you to avoid defects such as roughness, air bubbles, etc. This property allows beginners to work with this material.

Any building contains premises that require renovation. The range of uses of Knauf is quite wide; it is suitable not only for one type of construction work . Widespread use also explains the high popularity of the product. Where and how you can use it:

The plaster is suitable for application to many surfaces: concrete, brick, plasterboard, cement mixtures. This versatility allows you to significantly save time when implementing finishing work. This property positively distinguishes it from many other manufacturers who have a narrower application based on the type of surface.
The material can be used for both roughing and finishing surfaces. The layer that plaster can be applied reaches 50 millimeters, which is a very serious indicator. This property also helps to save time and money during construction, since one material replaces several (there is no need to purchase separately plaster for the rough coating) . This property gave another name to the plaster - start + finish.
Plaster is excellent for the preparatory layer when wallpapering, laying tiles, and can even replace conventional wall coverings. As noted earlier, paintable plaster today is considered the latest fashion trend in the design world.

Material consumption

When carrying out finishing work, it is necessary to calculate how much plaster will be required. To do this, you need to accurately determine the area of the surface being processed and the quality of this surface (presence of cracks, depressions and other defects). It is worth noting that all walls in the house must be treated. Considering that Knauf does not belong to cheap building materials, it is necessary to approach this issue competently. The manufacturer indicates that a layer 10 mm thick and an area of one square meter will require ten kilograms of Knauf gypsum plaster. Thus, it is enough to simply calculate the required volume of material.

In some cases, it is still worth taking a few extra bags in reserve in case the wall needs to be treated in several layers. This applies to houses of old construction and those houses that have just been erected. If cosmetic repairs in the room are carried out regularly, then it is better not to count on the reserve, given the ideal condition of the walls, which will only need to be slightly edited with a fresh layer of building material for cleanliness and hygiene.

KNAUF Rotband

The most popular of them is KNAUF Rotband. This plaster is versatile and can be used on almost all types of walls - brick, stone, concrete and polystyrene foam. It is suitable for application to walls and ceilings and can be used in areas with high humidity, such as bathrooms and kitchens. Rotband can only be used for interior decoration.

The basis of plaster is gypsum stone (or alabaster), which has been used in construction for several thousand years. Suffice it to say that the stone blocks of the Egyptian pyramids were held together precisely with a gypsum solution.

The advantages of Rotband include:

absence of cracks on the plastered surface even with a significant layer;
vapor permeability. Rotband does not retain moisture and does not create pockets of dampness;
environmental cleanliness. No toxic materials are used in production. Gypsum has the same acidity as human skin, so the plaster does not cause an allergic reaction;
Possibility of use with various sound and thermal insulation materials;
fire safety.

In fact, Rotband is both a plaster and a putty. When used correctly, an absolutely even and smooth layer remains on the working surface, which does not require further puttying or other processing.

The manufacturer allows various variations in the color of the dry mixture and the applied layer. Rotband can be white, gray or even pink. The color is determined by the mineral composition of the plaster and does not in any way affect its properties and quality.

Basic properties:

application layer thickness - 5-30 mm;
mixture consumption - 8.5 kilograms per m2;
Complete drying time is 6-7 days.

Important!
When performing finishing work, it is necessary to take into account the shrinkage of the plaster after application and drying. This is an unpleasant feature of all gypsum-based materials. The plaster must be applied with a small margin in layer thickness to compensate for subsequent shrinkage.

For convenience, Rotband is packaged in packages of 5, 10 and 30 kilograms.

Preparatory work before application

Before starting work, you need to make sure that the room temperature corresponds to the manufacturer’s instructions, this is from plus five to plus thirty degrees. Otherwise, the plaster layer may become deformed and the process will need to be repeated.

Before applying plaster, it is necessary to prepare the surface. If necessary, remove old layers, remove dust and dirt. The presence of nails, screws and other metal objects is unacceptable: firstly, the plaster does not adhere to the metal, and secondly, traces of rust are difficult to remove and additional processing . The worst thing is if in the future similar stains from unremoved metal parts begin to appear on fresh repairs. Then the repair will have to be done again.

If the plaster is applied to foam concrete or brick (surfaces with high moisture absorption), it is necessary to additionally treat such surfaces with a primer. Then the building material will not lose its qualities and will last as long as possible, protecting and preserving the walls.

Consumption of Diamant Knauf plaster

Those who are planning to start covering the external walls of a house with plaster probably have a question - how much material will need to be used per 1 m²? Considering the incredible losses, you will need at least 3.8 kg of plaster per square meter. Knauf Diamant “bark beetle” is characterized by having minimal consumption. And taking into account the affordable price of the material, it rightfully occupies a leading position in sales. The products are packaged in durable three-layer paper bags, which should preferably be stored in a dry place. After the expiration date, the plaster is not used, as its properties are lost. The average shelf life is about six months.

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Preparation of the solution

The most important stage of work is the correct preparation of the solution. This must be done in accordance with the instructions on the package. Experts recommend that you familiarize yourself with it before starting construction work and stock up on all the necessary items.

To prepare the solution you will need:

Spacious and convenient container;
Water for mixing;
Construction mixer.

You will need about half a liter of water per kilogram of dry mixture. Next, using a mixer, stir the solution until smooth and leave for five minutes , after which we stir again. That's it, the solution is ready for application.

It is important to remember that the solution is usable within half an hour, so its amount must be calculated based on the speed of application to the surface. Haste can lead to losses of expensive building material.

Knauf HP Start

The Knauf company also produces HP Start starting plaster. It is designed for initial leveling of the surface manually before further processing and allows you to eliminate defects in walls and ceilings with an amplitude of up to 15 mm. A version of this mixture is available for machine application. It's called MP 75.

Main properties of HP Start starting plaster:

application layer thickness - 10-30 mm;
mixture consumption - 10 kg per m2;
Drying time is about 7 days.

The company also produces primers for gypsum-based plasters. They are compatible with all machine- and hand-applied plaster mixtures.

Advice! Do not apply the mixture in several layers, one on top of the other. The adhesion between the layers is quite weak, which can lead to partial crumbling of the plaster after drying.

Application of construction mixture

The solution is applied to the surface in one layer up to 50 millimeters thick, using movements from bottom to top, if we are talking about a vertical surface. If the plaster is applied to the ceiling, then the movements are performed towards you. If a thick layer of plaster is applied, reinforcement may be necessary, since the solution is quite heavy. Galvanized metal mesh is used for reinforcement.

After about forty minutes the solution will set. Now it is possible to remove, if necessary, excess, this is done with a wide spatula. After the surface has completely dried, you can begin finishing. The plaster is moistened with water, and after the surface has become matte, grouting is done with a sponge trowel.

To give the surface perfect evenness, after complete drying, you can re-apply water and level it with a spatula. This procedure is recommended to be done one day after application.

Application method

Machine application

Machine application - material consumption is minimized, the speed of work is much greater. The layer thickness is in the range of 1-2 cm. The composition for machine application is not recommended for use for manual work. The plaster on the wall surface begins to spread.

Knauf MP 75 plaster is applied by machine. It is characterized by a smooth surface and resistance to high humidity. This type is applied to old coatings, wood surfaces, and drywall.

The permissible layer of material on the wall is 5-50 mm, on the ceiling 5-15 mm. The rate of plaster consumption on a 10 mm layer should not exceed 10 kg/m2. On sale is a 30 kg bag.

Manual application

Hand Application – Most types are applied by hand.

Complete drying process

Knauf does not require any special drying technologies. It is important to ensure that there are no drafts or sudden temperature changes in the room where the work was carried out. It is unacceptable for direct sunlight to hit the plaster . It is not recommended to speed up the process, as this may harm the material. After 24 hours of drying, it is necessary to ventilate the room to remove moisture.

It is important to remember that it may take a week to two for the plaster to dry completely. This period depends on a number of reasons, in particular, the humidity of the room and the material of the walls. Only after the plaster has completely dried can you proceed to the next stage of finishing. “Knauf” can be coated with almost any paint, and tiles can also be laid on top of it.

It is strictly forbidden to use lime mortars , as they damage the plaster due to poor interaction with its ingredients. If the entire process of plastering walls is carried out according to the rules and following the manufacturer’s recommendations, then the durability of Knauf will delight you.