To decorate the internal and external surfaces of the house today, a lot of different materials are used, each of which requires the presence of work skills, as well as some knowledge in the field of construction. Regardless of whether you were engaged in repair work or not, you should know the Knauf trademark; the stucco of this manufacturer is popular today all over the world.
In the assortment you can find materials for conducting internal and external works. Among the first, Knauf Rotband should be singled out, while the representative of the second variety is Knauf Unterputz UP 210, which will be discussed below. In order not to overpay, experts do not recommend purchasing a composition for external work, if you plan to do interior decoration. This is due to the fact that such compositions are more expensive for the reason that among their characteristics there is increased resistance to aggressive effects of moisture and temperatures, which can vary significantly throughout the year.
Characteristics of the Knauf Rotband Plaster Mix
Knauf gypsum plaster is intended for internal work, it is manufactured in Russia, so its cost is not too high for the domestic consumer. For 30 kg packaging will have to pay 360 rubles. A 10 mm layer will dry in three days, and the consumption per square meter will be 8.5 kg, which is true if the layer will have the same thickness. This composition has a gray color, and can be operated at temperatures from +5 to + 45 °. After preparing the solution, it should be consumed within 30 minutes, so you should not shut off too much of the mixture. The layer thickness can vary from 5 to 50 mm. This product is not intended for outdoor use. Among its qualities, elasticity should be highlighted.
The main features of the Knauf Rothband
Plaster "Rotband" Knauf is a versatile plaster mix for the manual decoration of walls and ceilings. The composition is suitable for almost any basis, whether it is brick, concrete, polystyrene foam, plaster or cement surface. If you plan to use this mixture for the decoration of ceilings and walls, you should consider that it should be used in rooms with a normal level of humidity. The product is suitable for use in kitchens or bathrooms. If it is planned to form a centimeter layer, then 8.5 kg should go per square meter. Builders especially liked Knauf Rotband plaster for smooth concrete walls and ceilings.
Preparation before using Knauf Rothband
The base must be dry and have a temperature of at least 5 ° before applying the mixture. The surface is cleaned of deposits, dirt and dust, as well as formwork grease. The protrusions should be discarded, and the metal elements are coated with anti-corrosion compounds. If we are talking about highly moisture-absorbing surfaces, then they are covered with a primer using an airbrush, brush or roller.
Knauf “Rotband” plaster can be applied on a slightly absorbent surface, which is pretreated with “Betoncontact” primer in order to increase the adhesion of materials. Expanded polystyrene, drywall and cement plaster after treatment with "Concrete contact" must be dried. Gypsum fiber sheets, silicate products and ceramic bricks, as well as aerated concrete, should be treated with Grundirmitel primer, which is dried after application.
Installation of beacons and preparation of plaster mortar
Plaster gypsum plaster Knauf "Rotband" should be applied on pre-installed beacons and protective profiles. On the surface with a step of 30 cm, apply mounds from the Rotband solution, into which the beacons are pressed. Their alignment is carried out in a separate plane. The distance between the profiles should be less than the rule length by 20 cm. The mounds from the "Rotband" should be applied to the inner surface of the corner profiles, removing them 30 cm from each other. Starting from the central part and moving towards the edges, the profiles are installed at the corners, this must be done in the same plane with the beacons.
To prepare the plaster mortar for 1 bag of dry mix, you need to add 18 l of water. About seven masters of the composition should be poured into the container and mix well. After that, the mixture remaining in the bag is poured into the container and mixed until it is possible to obtain a homogeneous consistency. If necessary, you can add liquid or a dry composition to the tank by mixing it. The result should be kept for about 5 minutes. During the application of the solution on the wall or ceiling, it is unacceptable to add a dry mixture or water, as well as other components.
Plastering
Recently, consumers are increasingly choosing Knauf products, the Rotband plaster of this manufacturer can also be bought by you. It is necessary to familiarize yourself with the technology of its application before the solution is prepared. Using the stucco falcon, the solution is applied to the ceiling surface. If you are working with a wall, then the movements should be directed from the bottom up. As an alternative solution, the composition is poured with a trowel. In the first case, the surface is leveled by the rule.
If it is necessary to form a sufficiently thick layer of plaster, the mixture is first applied before drying with a pile using a plaster comb. The next layer is applied one day after the complete hardening of the first. On the polystyrene foam or DSP, the plaster is applied together with a reinforcing mesh, the dimensions of which should be equal to 5x5 mm. The grid is embedded in a third of the layer depth.
Alignment Guidelines
Having visited the store, you can see that Knauf brand products are presented in a large assortment, the plaster of this manufacturer can be designed for external and internal works. If you used the latter variety, the setting of the mixture will occur 45-60 minutes after application. At this stage, the master levels the surface with a metal spatula or rail, filling in the recesses and cutting off the excess. On slopes and corners, irregularities should be cut with a plaster plane.
Surface smoothing and smoothing
If it is supposed to stick wallpaper on the wall or paint the base, then after 15 minutes the surface is wetted and wiped with a sponge or felt grater. This allows you to align the grooves and marks from the spatula or slats. As soon as a matte shade appears on the surface, the plaster is smoothed with a wide spatula or metal grater. Such a wall after drying will be ready for wallpapering. If you want to achieve a glossy surface, then 3 hours after applying the mixture, the plaster is wetted with water and smoothed with a grater. This must be done during the day, after the plaster does not have to be putty, as it will be ready for painting.
Characteristics of Knauf Unterputz UP-210
For external work, you can use Knauf cement plaster, which comes in 25 kg bags and costs the consumer 243 rubles. This leveling mixture is made on a lime-cement basis. The composition is intended for manual and machine application. Knauf Unterputz can be used for plastering not only facades, but also ceilings, as well as walls in rooms with high humidity. This should include garages, basements, etc. With success, this composition is used to level the bases for facing with natural stone, decorative plaster or tile. Intended mixture for internal and external work. The dry composition consumption per square meter is 16.5 kg with a layer thickness of 10 mm. During operation, do not allow freezing and rapid drying of the plaster until it hardens. A decorative coating can only be applied after the plaster layer has dried.
The product is made on the basis of special additives, cement and fractionated sand. The mixture is able to increase the water holding capacity of the surface, the material is plastic and makes it possible to form the thinnest layer of the solution. In the process of drying, the mixture does not shrink, no cracks form on it. Application can be carried out using a continuously running pump or manually. Knauf facade plaster has a grain size of less than 1.5 mm, adhesion is 0.4 MPa. The compressive strength is more than 2.5 MPa, and the viability of the solution can vary from 1.5 to 2 hours. The water-holding capacity of the mixture is more than 98%. The indicators of frost resistance are also very impressive and amount to 150 cycles of freezing and thawing.
Application Features
Knauf products have a fairly reasonable price; stucco for the facade is no exception. But in order to achieve a positive result, you must follow the application rules. For example, Knauf Unterputz can only be used at positive temperatures, as well as on completely dry surfaces. The base must be freed from exfoliating particles, otherwise in the process of application it will be impossible to avoid errors. Subsequently, some elements of the plaster can simply move away from the surface of the wall.