In order for the plaster to firmly adhere to the wall, it is necessary to prepare the surfaces for plastering before applying it, since without this work there will be no reliable connection between the materials. If you put a layer of mortar on an unprepared wall, it will first crack, and then can even crumble. Therefore, before starting to plaster, it is necessary to determine what material the walls consist of, since for each of them a different preparation of the walls is carried out. But at the same time, the main work for everyone is cleaning from dirt and dust, as well as leveling the surfaces.
How to apply plaster on a brick wall?
This type of wall is the most common, so the preparation of brick surfaces for plastering is of great importance and is performed as follows:
- If a brick wall is lined with voids between the bricks, then you should simply clean such a wall from dust or treat it with a special cleaning solution.
- After this, it is necessary to apply notches that will give the wall additional roughness. This is necessary for a good adhesion of the plaster to the wall.
- When the wall is laid out in such a way that all the distances between the materials are filled with cement, these lines need to be deepened by 10 mm. After that, all the distances between the bricks are thoroughly cleaned of the remnants of the knocked out solution. To do this, you need a brush for metal.
- The next step in preparing brick surfaces for plastering is cleaning the entire wall from dust. In the event that the brick wall does not have roughness, notches are made on it. This method will improve the connection of the wall with the plaster.
After completing these works and before the process of plastering, the walls must be primed, then wait for the primer to completely dry (after about 8-12 hours), and then you can start working with the mortar.
Concrete Wall Preparation Method
In order for the preparation of concrete surfaces for plastering not to be useless, you need to know the following rules. Since this surface does not have roughnesses, the stucco does not attach well to it, therefore, notches must be applied. They are made with a hammer, chisel, grinder, and for large surfaces use a puncher or jackhammer. They are applied in the order of chess and should be 4 mm. After the notches are ready, it is necessary to attach a metal mesh with dowels over the entire surface. At the same time, it must be pulled very securely along the wall. This is necessary in order to keep the solution well. After this, the entire surface should be plastered with a solution. This surface does not need to be cleaned, it must remain rough to firmly fix the plaster on it.
Preparation of wooden coatings
Consider how the preparation of surfaces for plastering is carried out. Shingles are generally applied to such a coating, but this method is now outdated, and plasterboard sheets are used for this purpose. When applying shingles, one even layer is first attached. You can use any board, even curved and rough. The second layer is even planks. All these layers are fastened with nails. After installing the necessary layers on the outside, a metal mesh is attached. During operation, each layer that is installed is treated with a special antiseptic. It will save the tree from fungus and moisture.
After installing the shingles, a metal mesh layer is applied to it. This is done if this ceiling or wall is subsequently exposed to facing work. If a layer of plaster will be applied to the surface, then a mesh is not needed.
What is mechanical plaster?
This is a type of plastering surfaces using a special machine. It has a container in which gypsum or cement plaster is poured, which is automatically mixed with water.
Then, using a special hose and dispenser, the finished mixture is fed to the walls. It remains only to level out. Such work is carried out by at least two people. This type of mechanized plastering is used for large areas that require plastering.
Thanks to the use of this technique, the speed of work is increased, the cost of the dry mix is reduced, since for this machine they are cheaper than for work with plaster without equipment.
In addition, this process is much faster, since mechanical plaster is immediately applied to the wall, and evened out by another builder. Another of the advantages of this work is the absence of uneven areas, mounds and depressions that are obtained with manual work.
Accordingly, if you need to put a solution in a new house, you can apply mechanical plaster. This method is also suitable for the construction of multi-storey cottages, offices, industrial buildings.
Why prepare the walls before applying the plaster?
Many people who are not related to construction do not know that for a good plastering of the walls they need to be properly prepared. Therefore, the importance of preparing surfaces for plastering is great, because if there is no this work, the mortar can first attach to the concrete wall, and after a while slide into layers, if not completely, then partially crack, it will begin to sprinkle. The reason for this process is a poor connection of the applied layer of gypsum or cement mixture to the surface.
The surfaces of walls and ceilings can be made of wood, brick, concrete, plasterboard, plastered. When preparing surfaces for plastering, these working areas must be thoroughly cleaned of contaminants, eliminate all flaws that are on their surface, and use the above tips on how to properly plaster each type of wall. It is better to spend time preparing than to redo all the work, and in the worst case, all the repairs. Plaster is very important, because it is the decoration of the walls, and already paint, wallpaper or other coatings are applied to it. To apply these coatings and maintain the integrity of the entire room, due attention should be paid to these works.
Conclusion
So, we examined how to prepare surfaces for plastering. After the repair is carried out correctly, you can admire your work for a long time, and failure will bring not only disappointment, but also the additional cost of eliminating all production errors.