Cemented cement plaster for leveling surfaces
For the preparation of uneven grounds in the form of externalwalls often used plaster cement. The facade part of the building after its application can be decorated with other decorative compositions. To carry out works from the outside, gypsum mixtures are not suitable, as they have insufficient moisture resistance and relatively low strength indices.
Advantages and disadvantages of solutions based on cement
Typically, cement-based plaster is deliveredin the form of dry composition, which after adding a certain amount of water can be applied to the surface of walls or ceilings. The binder used has a number of suitable characteristics for outdoor applications.
First of all it is worth noting the resistance toatmospheric influences. After the final hardening, the mixture can be kept in a humid environment for a long time without any damage. Equalizing coatings are not afraid of ultraviolet rays and sudden temperature changes.
Many consumers are also attracted by the lowcost of production. For example, inexpensive is the cement facade plaster "Knauf Untermputts". The price of one bag weighing 25 kg is about 220 rubles. At the same time, the material consumption is relatively small.
Of the minuses, it should be noted the low plasticity of the finished solution, which somewhat complicates the application process. However, with the correct approach of the master, this shortcoming is not so tangible.
Most Popular Trademarks
The modern market offers a wide range ofproducts, as there are a lot of manufacturers. Compositions can differ in qualitative characteristics. Sometimes they introduce additional substances that contribute to the improvement of specific parameters.
The table shows the brands that usehigh popularity among different categories of consumers. In it, there is information about how much is the facade cement plaster. The price is indicated for 25 kg of dry composition.
Name | The cost in rubles |
KNAUF UNTERPUTZ | 220 |
CERESIT CT 24 | 450 |
UNIS | 300 |
"VOLMA" | 230 |
"FOUND THE PROS" | 240 |
These brands are well known in the Russianmarket. They proved their worth in a competitive environment. They can be purchased without fear that the product will be of poor quality. In the case of unknown brands, there is a risk of encountering low-grade products.
Specifications of one of the brands
As the considered sample will be takenplaster cement facade "Knauf Untermputts". It is suggested to carefully study its technical characteristics in order to be convinced of the expediency of application. The basic parameters are clearly stated in the table.
Characteristic | Value |
Compressive strength | > 2.5 MPa |
Level of frost resistance | 25 cycles |
Consumption at a standard thickness of 1 cm | 16.5 kg / sq. m |
Mixing time | 90 minutes |
Grain | <1.25 mm |
Storage period | 1 year |
Max. Application thickness | 3.5 cm |
Stucco composition of the presented brand canbe laid on the surface of walls or ceilings not only by hand, but also by machine. The coating after the final hardening is able to withstand a temperature range from -50 to 70 degrees. Since the mixture has a neutral color, it does not appear through the finish.
Surface coating technology
Used plaster cement facade forobtaining high-quality bases for other types of cladding. On the hardened surface can be applied paint or decorative mixture. The entire process is conditionally divided into several stages.
- Substrate preparation. At this stage, all kinds of dirt are removed from the surfaces. For better adhesion of the composition to the wall, a primer is applied.
- Setting the beacons by level. To simplify the application process, you can use special metal elements that have perforations. The distance between them is determined by the length of the rule. They are attached to the wall by means of dowels.
- Preparation of the mixture. To obtain the working solution, the dry composition is introduced into a suitable container with water. After stirring, no lumps should remain. On 25 kg usually leaves 4,5-5 l of a liquid.
- Application of the finished mortar to the wall. The building mix is applied to the base with a spatula between fixed beacons, then it is smoothed out by the rule. After solidification, the metal elements are removed, and the remaining traces are sealed with a solution.
If a layer thicker than15 mm, it is recommended to use reinforcing mesh. Its laying helps to avoid detaching coverage in the future. Most often not metal, but polymer meshes are used, since they are quite accessible.
Precautions for work
When the cement-based plaster is applied to the wall, it is by no means possible:
- avoid contact with the eyes and respiratory system;
- leave unattended heaters and other appliances for drying, if used;
- to apply unstable forests at altitude;
- to carry out finishing operations at a temperature below +5 degrees.
As a conclusion
Although the choice of a trademark plays an important role,the correctness of applying the mortar directly to the surfaced surface is of no small importance. In some cases, it's not so important whether it's Unis products or Knauf products. Plaster cement facade must be first applied correctly. Even the best quality mixture will not last long, if the basic rules were not observed in facing works.
