Since in the near past, instead of wallpaper, paint was often used, today the question of removing it from the concrete wall. This event is mandatory, otherwise, wallpaper, tile or other materials will hardly be attached to the crude wall surface. Consider quick and efficient ways to remove old paint.
Before proceeding with the cleaning of the concrete surface, several moments should be analyzed. This will help you choose the necessary method of cleansing and will allow you to quickly reach the goal:
- Estimation of the status of walls. If the decor of the walls of plasterboard is assumed, then the presence of paint on the surface will not be an obstacle. In the sticker of wallpaper or tile, it is necessary to carefully remove the previous coating, while not all methods are suitable for the preparation of the walls to further work.
- Selection of tools. Here you should consider efficiency and convenience in operation, as well as the opportunity to get the desired type of tool without difficulty and excess spending.
- The species of the coating and the thickness of the applied layer. This directly affects the complexity and duration of the process. A thick layer of coloring agent to remove from concrete is much easier than the paint applied in one layer on a thinly primed wall. To determine the type of coloring composition you need to try to remove it on a small area. The water-level and acrylic paint is deleted quite easily, but this option is also possible that the former tenants used the most resistant option – oil paint.
After reading the main parameters of the preparatory stage, you should move to the choice of the appropriate method.
Methods of mechanical impact on the old coating make it possible to clean the surface of the walls without the use of toxic substances, but with the presence of dirt and dust. Therefore, it is necessary to pre-prepare the means of protecting the respiratory tract and eye – respirator, safety glasses and gas masks.
The most affordable way to remove the old coating is the use of the chisels and hammer. Complete for these purposes and a small hatcher. This method requires huge temporary and physical costs, but the result will be a flat surface. This technique is inappropriate for large amounts of work.
A pre-ended ax or a pointed side of the hammer should be rich in the top surface every 2-3 cm. After that, the surface in cracks is needed with a brush or roller well to moisten with water, to enhance the effect you need to mix in the liquid of the wallpaper glue or salt into the liquid. After 6 hours, you can proceed to the discovery of a swift layer of paint with a spatula. Paint can be left small particles or close-ups. Upon completion of work on the walls, you should walk with a large sandpaper or a rigid brush, let me dry and only then move to the next stage of work.
Walls can be cleaned with the help of electrical appliances. Their use allows you to remove the old layer quickly and without much effort. However, they all work quite noisy, so it is necessary to clean the walls in an apartment building in this way in a specially designated watch or by prior arrangement with neighbors.
For such works, you can use a perforator. The nozzle for these purposes should be chosen in the form of a shovel by fixing it in loafing mode. To work carefully, you need to keep the tool at right angles. The perforator movement is directed down or up due to the vibrations published. Make the process will quickly help the widespread nozzle.
Another popular electric appliance – Bulgarian. With the help of it, you can remove even hard paint, applied on a wall or a thin soil coating. It is capable of cleaning the walls to the base, leaving a smooth, ready for further work surfaces. This car does not need to use when working in small non-refined rooms, because from the rissed dust will not even protect the mask. In large rooms, it is also necessary to interrupt more often and moisturize the air so that the dust will rest in the floor.
Removal of paint from the walls is possible with a drill using three nozzles. The cave-seater nozzle consists of three chains, each of which is located 13 units. It allows you to shoot paint with pieces, and the layer of plaster remains unscathed. However, the colors is not durable: there may be several pieces of nozzles for wall processing in the same room.
Effectively running drill with a picker, However, it creates a lot of dust.
The crowning nozzle works well on brick, but if you wish, you can use it and on concrete. Choosing this method, though it will save from a large amount of dust, but takes a lot of time.
The general disadvantage of all listed devices is that it is impossible to remove the paint in hard-to-reach places: beyond batteries, pipes and corners. In these areas, paint will need to finish manually. Wall after purification by a perforator or “grinder” become rough, which improves grip with a solution when laying ceramic tiles.
Removing old paint with modern special washes – fast, silent and effective way. When using these funds, it is also necessary to protect your hands, eyes and respiratory organs. The algorithm of work with chemistry is described below.
With the help of a brush or roller, you should apply a chemical reagent on the wall with a good layer. It is necessary to carefully ensure that the tool is not applied to the same site. Flooring and plinth should be caught in order to avoid chemical.
Almost immediately after applying, you can begin to brush the wall with a rigid iron brush. If the paint has not been deleted immediately, then the procedure should be repeated.
After chemical exposure, the wall should be washed with warm water with powder and sponge.
Do not forget that all these tools are very toxic, so their use is possible only in well-ventilated rooms.
The agent to remove the old coating can be prepared at home. To do this, you need to take 1.2 kg of oversized lime, 500 grams of calcined water and ordinary water in such a quantity so that it turns out thick and homogeneous paste. The solution must be applied to the wall and leave for 12 hours. After that, you can clean the surface from paint.
If acrylic paint was used, then you can use a foamy soap solution to which salicylic acid or ethyl alcohol has been added. For latex paint should be used chloroform or dichloroethane.
Another chemical paint removal method – glass in liquid form. It should be finely applied to the working surface and leave until complete drying. After that, on the processed section, you should walk with a spatula or brush with a rigid bristle.
Water-emulsion coating Not older than 3 years can be removed using wallpaper glue. It is bred according to the instructions, applied on the wall and instead of wallpaper stick old newspapers. After drying, the newspaper should be kept together with the paint layer.
Covering old paint from the wall can be removed using high temperatures. However, some varieties of paints under the influence of hot air, on the contrary, are connected to the wall. Therefore, before starting work, you need to test in a small area. Also, the thermal method is not recommended to use near the mains.
Industrial Hair Dryer is one of the heat to clean the walls. With it, it is easy to remove acrylic, water-emulsion, as well as difficult to derived alkyd and oil paints. When exposed to a hair dryer, bubbles appear on the painted wall. This means that the paint is lagging behind the wall and can be removed by a spatula. It is convenient to work together – one warms, and another cleans.
Soldering lamp copes with the task not worse than a hair dryer. But it is worth remembering that such a tool is a source of open fire, so it cannot be used near textile, paper and other flammable items. Also included the device can not be put on the floor.
From undergraduated heat devices sometimes use iron. To do this, you need to stick a piece of foil on the wall and try it with an iron. Then you should quickly remove the foil and proceed to removing the softened paint layer.
It is worth remembering that when heated, the paint exudes harmful pairs, so you do not need to neglect the means of protection and follow more often to breathe on fresh air.
Other ways to remove paint
In addition to the described methods, there are still some paint removal techniques:
- Using shot blasting equipment. This method is not popular due to the high cost of the device, but it can be rented.
The principle of operation of this device is very similar to a sandblasting machine, only metal balls are used as abrasive material. Metal balls are used as abrasive material. They are under high pressure jets fly out of the nozzle and instantly remove the old layer, after which they are absorbed along with the paints through the vacuum cleaner. Therefore, dirt with this method is quite a bit. The lack of skills of working with the device can lead to the fact that together with the paint, the layer of concrete.
- Water jet. High pressure water has the same effect on the paint as the device described above. However, in the apartment, the use of this method is fraught with the fact that you can flood neighbors. In addition, water is not able to remove a resistant epoxy paint.
- Grinding machines with diamond discs. This device is very effective, but requires a certain skill and accuracy of movements, as well as a high pace of work.
How to remove the old paint from the walls, look in the following video.