The walls are peeling and the white powder is peeling, what homework should be done before renovatin

As the area with the most extensive decoration area in the house, the decoration of the walls is the easiest place to distinguish between good and bad. Now although everyone can make a good comparison between the quality when decorating,It is even possible to choose a better decoration team according to the public's reputation, but one thing remains the same, that is, decoration is not just a simple matter of money.

When it comes to wall painting, it doesn't mean that a good choice of materials can be done. Even many times, when expensive stucco materials are chosen, peeling and other phenomena occur after decoration, many people will think that the paint is not worthy of its nameIn fact, it is more because the decorator's technique is not in place.

The difference between a skilled and a novice is obvious, especially when it comes to the basics of painting walls. Therefore, for residents who need to renovate, instead of choosing expensive and sudden materials, they areIt's better to spend this time to pick a reliable renovation team. A reliable decoration team can make the original five-point material show the effect of eight points.

On the painting of the walls, peeling may also be due to the omission of the program. For example, some people think that the quality of the latex paint they buy is very good, so they decide not to paint the primer and directly paint the latex paint. This is also a problem that many unskilled decorators do not understand.

However, after the primer on both sides is missing, in the painting process of latex paint, it is easy to lead to the uneven distribution of chemicals in latex paint, and the most obvious manifestation is the uneven distribution of alkaline substancesAs a result, the properties of the walls vary markedly. Therefore, the problem with the wall is also an obvious problem.

Do not carry out construction in summer, the humid and hot weather in summer is not conducive to the drying of the wall, it is easy to cause white powder and peeling on the wall, and the base layer is not too thick, the adhesion between the base layer and the latex paint must be enough, and then find a reliable construction team for construction.

Before construction, you can clean the wall to clean up the unclean things on the wall, which can reduce the appearance of white powder and peeling.

Choose latex paint with good performance, and the construction process of workers must also be good, and the problems to be paid attention to in construction must be understood in detail and avoided.

There are many different situations that can cause the wall skin to fall off. During the construction of wall decoration, the base layer is not cleaned or improperly handled. The quality of the prepared mortar and raw materials is not good, or it is not used properly by construction workers.

If the base layer is not properly brushed, if the one-time plastering is too thick, the dry shrinkage rate of the wall is larger.

When painting, it is necessary to choose a good latex paint, and workers should also pay attention to the painting strength when operating.

Choose latex paint with good performance, water-based paint, and the construction process of workers must also be good.

Stucco is to choose a better latex paint, followed by the choice of workers, be sure to choose a skilled master.

Wall paint paint Coatings are mainly divided into latex paints, water-based paints, and a diatom mud that is said to adsorb formaldehyde. Compared with other finishing materials, coatings have the advantages of light weight, bright color, strong adhesion, simple construction, rich texture, low cost, water resistance, stain resistance, aging resistance and so on.

Choose skilled construction workers, prepare mortar and raw material quality must pass.

The foundation is not cleaned up or mishandled. In addition, the quality of mortar and raw materials is not good, or the construction personnel are not properly operated, which may cause falling off.

Choose latex paint with good performance Wall paint Coatings are mainly divided into latex paint and water-based paint.

The appearance of white powder and peeling on the wall is because the grassroots work is not done well when the wall is decorated, and there are some debris on the wall that have not been cleaned up, and it may be that the weather is humid and the ventilation is not done well during construction.

This is a chemical reaction because the wall is damp and causes peeling, or it may be because the wall has been used for too long, resulting in peeling, white powder, to repair is also a relatively large project, to flatten the wall surface that has been renovated before, and then re-decorate.

If the putty powder has too poor adhesion, and you live in a humid south with humid air, it will cause it to dissolve in water and peel easily. When decorating the wall, make reasonable planning to avoid clutter, or if these appear in the later stage of completion, it will be more troublesome to deal with. If there is a fine white powder on the wall, or if something is not clean, it will appear white powder and peeling.

There is a fine white powder on the wall, which means that the salt in the wall is "precipitated" in the drying process of cement, at this time, it can be brushed off with a nylon brush or an iron brush, and after a few days of observation, it is determined that there is no more white powder precipitation, and the cement wall is dried and smoothed, and it can be painted. If there is a lot of white powder on the surface of the mud wall and it continues to precipitate, we can clean it up first and apply it to the wall primer to prevent salt erosion and the formation of wall cancer in the future, so as to avoid irreversible consequences. In short, the wall peels off a large area, and the white powder is a big problem, we must first find the cause and find a way to solve it, so as to reduce our losses, and also make us easy and efficient in house decoration.

It is the cement wall that is eroded by water vapor, and when the water vapor enters and exits the cement cracks, the carbonate (especially calcium carbonate) crystals (that is, the hairy white matter seen) produced by acid-base neutralization occurs, and when it silts on the wall, the wall paint wallpaper blisters, bulges, cracks, and peels off; Therefore, water vapor is the real culprit. When the walls leak or seep water during the rainy season or the building is poorly ventilated, a large amount of moisture accumulates in the environment; When this water vapor encounters acidic gases such as carbon dioxide or sulfur dioxide in the air, it forms acidic water vapor, which then condenses into acidic dew on the cement wall (i.e., like acid rain, the pH value can reach as low as possible). This acidic water vapor and acidic dew will penetrate into the wall due to poor waterproofing or cracks in the wall and neutralize with the alkaline molecules (such as sodium, calcium, magnesium, potassium) in the cement, sand, and brick walls, and then combine with carbon dioxide in the air to form crystals, which is what you see in the form of white needles or powders.

The solution is to repaint and keep the room dry later.

The appearance of a white snowflake-like powder on the wall is a phenomenon of alkali reflux for the following reasons:

1. In the exterior wall structure, cement mortar, anti-crack mortar, ceramic adhesive and grout all contain a certain proportion of cement components.

2. "White frost" is a white substance that slowly covers the surface of the brick with the diffusion and dehumidification of alkaline materials with high composition in cement, and the main components of the white substance are alkaline metal salts such as alkaline potassium sulfate and sodium bicarbonate, which are easily soluble in water. The main ingredient of "tearing" is calcium carbonate, which occurs when there are gaps in the back of the bricks, cracks in the walls, or gaps in the bricks, and water infiltrates.

Treatment method: 1. Clean the anti-alkali part of the wall with oxalic acid first.

2. Scrape the floor glue again.

3. Use sand putty to level.

4. Anti-alkali is done, and the base putty is scraped.

The appearance of white powder on the wall is mainly caused by the following reasons, the first room has a place close to the wall of the water pipe, especially in the summer, the condensation of the water pipe is shaded to the wall, causing a long time of dampness on the wall, and the powder slag appears on the wall. Second, because the house is close to the shady side, especially the place near the water behind the first layer of wall, the long-term dampness of the room is also easy to cause white powder on the wall. Third, when other residents leak, the wall is soaked in water, and the wall is always wet, and the wall is always wet, and white powder is easy to appear after the wall is dry.

Fourth, the putty used on the wall is not of good quality, and it is easy to appear white powder if it is slightly damp. Finally, it is recommended to shovel out the place where there is powder, and re-scrape putty must be made with waterproof putty of the highest quality, and this problem will not occur.

The wall is anti-alkaline, that is, the cement is frosted.

The main cause of cement frosting is that the cement product calcium hydroxide reacts with carbon dioxide in the atmosphere to form calcium carbonate and deposit it on the surface of concrete products.

The reason for the white powder peeling on the wall is that there is a problem with the wall ash material of the wall, and another is the craftsmanship of the whitewasher, and there is a problem with the technology.

Because of the paint peeling caused by excessive moisture or dampness on the wall, it is also possible that the material used to paint the wall is an inferior product, and it will cause the front to peel off and peel off the powder if it is used for too long.

The fundamental reason for the appearance of white powder and peeling on the wall is that the water used in the construction of the wall is too alkaline, resulting in the hardness of the water.

If the wall peels off, there are usually two reasons, the first reason is that the paint you paint the wall is not too good, the second reason is that the technique is not right when you paint the wall, that is to say, the ability of the technician is not good, and the third reason is that the humidity in your house is too large, resulting in the dampness of the wall skin, so it will peel off.

The reason for the peeling of white powder on the wall is that the wall is damp and the white scrape on the top is that the material begins to fall off when the moisture returns.

This is caused by the thermal expansion and contraction of the wall, and the unqualified materials used in the construction process will also cause the wall to fall off.

White powder appears on the walls. The reason for peeling is that the viscosity of putty powder is not enough, generally when we scrape putty, the first layer will add a little glue or cement.

Before painting the wall, the putty on both sides should be painted before the putty is not dried thoroughly, which is particularly easy to cause powder and peeling. Daily attention should be paid to more ventilation and less humidity, which may delay the occurrence of this situation.

This is the case when the cement absorbs moisture and produces a carbon dioxide reaction.

If the wall is white powder and peeling, it means that the wall is too wet. This is to do a good job of moisture-proof measures in the house, so as not to let moisture or water stains damage the wall environment. Maintain a good wall environment, drain water in time, and keep the room dry and ventilated.

In general, this situation may be that the maintenance of the ground was not done well when the wall was painted at the beginning, resulting in uneven painting, or it may be that the wall surface falls off due to the dampness on the surface in the later stage, and then there is the reason why the stucco paint is not good.

This is a chemical reaction to peeling caused by moisture on the wall, or it may be due to the peeling of the wall for too long, resulting in the appearance of white powder.

The appearance of white powder on the wall, the first indicates that the quality of the paint is not very good, the second indicates that it is caused by moisture, and the third is that when the wall workers are powdered, they do not pay attention to the quality and the effect is caused.

It is mainly due to the long-term moisture of the wall, which leads to the chemical reaction of the white lime on the wall, so the white powder and peeling phenomenon will be produced.

After being damp and painted, it does not dry and lives in people, and it is caused by a long period of rainy days. If there is peeling, it is more troublesome, and it is necessary to remove it all and repaint.

1. The foundation of the house is settled, and the wall will also be stretched in the process of settlement, resulting in the situation that the wall skin falls off.

2. During the construction, the workers began to brush the latex paint without cleaning the base layer, which led to the phenomenon of the wall peeling off the wall.

3. The stirred mortar is not used up in time, and the adhesion with the wall is not enough due to the long parking time, which causes the wall skin to fall off.

What are the precautions for painting old walls?

1. Painting paint on the new batch of cement walls must be compared with the outer layer of lime before it can be carried out, otherwise the wall will appear spotted and affect the beautification.

2. When painting lime slurry, it is necessary to constantly mix the lime slurry, otherwise the lime slurry will be deposited, resulting in different stripes on the wall after painting.

3. When painting, it should be from top to bottom, one stroke at a time, and the principle of vertical brushing, or horizontal brushing from left to right, but you should pay attention to it, and do not miss the pen.

4. On the dark old lime wall (except for the glue white wall), when the color is rewritten on the wall with more mottles, it should be brushed with white ash water first, and then the color should be rewritten after it is boring and white.

5. If the lime wall is painted within half a year, add acidic colorful wall paint, if green, sky blue and other colors, neutralization and overcolor may occur, and you need to pay attention.

6. Painting the old wall by yourself is very simple, but you should also pay attention to safety and do a good job of safety protection during the painting process. For the sake of environmental protection, Chengmei's pure natural paints, such as lime stucco paste, should be used.

What are the ways to paint old walls.

1. The first thing is to clean the wall. If there is a fine white powder on the wall, which is due to the separation of the salt in the wall during the drying process of the cement, it can be removed with a nylon or iron brush. After a few days of investigation, until there is no more white powder and the cement wall is dry and smooth, it is ready to be painted.

2. Use a knife or iron brush to remove the peeling paint film, and then use sandpaper to smooth the appearance.

3. Tidy up the wallpaper pasted on the clean wall.

4. Trim the appearance of the stool. The batch contains sedan car scraping putty to fill the holes and gaps, and after it is completely boring, it is smoothed with sandpaper.

5. To deal with wall lesions, the lesions may have stains, blistering, cracking, flakes or chalking, etc., and it is recommended to consult a coating professional for treatment.

6. After the wall is treated, that is, the primer.

7. Paint the topcoat. Brush from top to bottom. After mixing the paint with a stick, the paint should be painted from the ceiling and then down to prevent the paint from dripping from the ceiling from smearing the finished wall.