What is the cause of peeling on the wall, and what is the cause of peeling on the wall

The main causes of peeling are:

1. The stucco layer is hollow;

2. When the wall is painted, the indoor humidity is large, which produces moisture return, which causes the paint layer of the later construction of the wall to peel.

3. The wall is in a humid environment for a long time, such as water on the other side of the wall for a long time, or there are cavities in the wall, and it is damp after rain, resulting in the peeling of the indoor wall.

1. Dirt at the base level.

There is oil and dust on the wall before painting, which affects the bonding. Prevention method: Clean the base layer before painting.

2. The primer is smooth.

If the surface of the primer is too smooth, the topcoat will not be able to penetrate the primer force and will not be able to bond. How to prevent it: Use matching brands for primers and topcoats.

3. The putty powder is low.

If the adhesion of putty powder is too poor, it will cause it to dissolve in water and peel. Prevention method: Choose water-resistant putty powder with good strength.

4. Strong cohesion of elastic coating film.

The elastic coating film itself has strong cohesion and poor permeability, which will lead to the situation that the entire layer of the coating film will peel off the wall. Choose the best elastomeric coatings.

The reason for the peeling of the wall is generally these two reasons, one is that the wall material is not good, and the other may be caused by serious anti-moisture on the wall. Therefore, when the decoration is carried out to the wall, we must pay attention to the purchase of high-quality materials, and the painting process should be optimistic, so as to avoid not doing enough, a small amount of peeling You can buy some of the materials in the picture, and you can repair it yourself!

wall repair materials.

If it is only the peeling on the surface, the first blistering and then the peeling is water, dampness, resulting in peeling, it is estimated that it is the reason for the leakage or waterproofing.

If it is a very thick wall skin falling off, this is together with the putty powder, it is estimated that the wall was not chiseled at that time, or the putty, the gypsum layer was not done, and the material is not good!

When the wall peels off, it is dry or wet, if it is wet, it is basically a return to moisture, if it is dry, there is no water trace, it may be that the pre-decoration is not done, buy a little of this kind of wall repair on your own!

Wall repairs.

What is the reason for the peeling of the wall, it is very common for the wall to peel off, many people will find that the wall of their home begins to peel off after the decoration and occupancy, many people do not know what the reason for the peeling of the wall, let's understand what is the reason for the peeling of the wall.

1. Peeling off and discoloration when exposed to sunlight

In the hot summer, for the buildings with large lighting area and insufficient air circulation and the wall directly exposed to sunlight, the temperature is too high, and the water-soluble salt crystals on the surface of the wall cause discoloration, fading, color shedding and even cracking, and secondly, the use of air conditioning causes the temperature difference between indoor and outdoor, resulting in the expansion or contraction of the wall surface, and also causes local wall peeling.

2. The wall peels off when it is damp

One is that when the wall foundation is wet, if it is not completely dry, the paint will be painted, and the other is that the wall is damp due to the high moisture in the air during the rainy season, both of which are moisture seeping into the paint surface and causing the paint film to lose its adhesion, resulting in peeling and peeling.

3. The surface of the wall is moldy and spotted

If mild mildew is mildew, wipe the wall with mildew water, 84 disinfectant solution or bleach solution (diluted to 5-10%); If the water seepage cracks the wall and causes serious mildew, remove the floating ash debris along the crack hook, fill the sealing material into the joint and then paint the waterproof paint twice along the wall surface, if it is the temperature difference, see if there is a thermal insulation layer wall (knocking on the wall has a hollow sound), there is no can be added, if there is a thermal insulation material, replace it to cure the root cause.

4. There is sagging when the paint is dry

The simple remedy is to let the coating film dry completely, wet grind and polish with very fine sandpaper, or wet grind with fine sandpaper and respray, and the root cause mainly includes several aspects: correct setting of symptomatic spray gun, correct spraying technology, applicable thinner, increasing the temperature of the spray chamber, keeping the spraying surface clean, etc.

Reasons for this:

1. It may be because the base layer of the wall is relatively loose, the surface of the base layer is accumulated with oil, the moisture content in the base is relatively high, the humidity of the environment is too high during construction, the paint is frozen before it dries, the ratio of cement is not appropriate when plastering, the putty ratio of the wall is inappropriate, the putty is unevenly scraped or the ratio of latex paint and water is not appropriate, etc.

2. The quality of the latex paint used on the wall itself is also a major reason for peeling. Therefore, when decorating, we must be very strict about the quality of the materials and products used, as well as supervise the construction technology of the construction team, and strictly follow the requirements of the construction, which can basically avoid the occurrence of peeling to a large extent.

Solution: 1. If there is a large area of cracks in the wall and the skin is peeling, the base of the wall at the crack can be made into a "U" shape. 2. For some special lightweight partition walls, kraft paper or nylon mesh cloth is generally used. After cleaning the base layer, you can paste a layer of nylon mesh cloth on the peeling wall, or newspaper, kraft paper, so that the paint film of the latex paint can have integrity.

3. Elastic putty can be used to make up for the problem of peeling cracks.

In our home life, I believe that many friends have encountered the phenomenon of peeling, cracks, mildew, fading and other phenomena on the wall of the house, so what should we do if these problems occur? In fact, when these problems arise, we must first find the cause, so that we can.

Get the right medicine. Achieve the effect of doing more with less. Let's take a look at the reasons for wall peeling and how to deal with wall peeling.

Reasons for peeling on the wall:

Reason 1: Caused by the loosening and pulverization of the base layer of the wall.

Reason 2: There are floating ash, oil stains, release agents, etc. on the surface of the base layer.

Reason 3: The moisture content of the base layer is too high.

Reason 4: The construction team is working in a high humidity environment.

Reason 5: Freeze before the paint dries.

Reason 6: There are cracks in the insulation layer of the original house, which causes the wall to crack during decoration.

Reason 7: Improper repair and painting after the wall is slotted, resulting in cracks in the wall shrinkage.

Reason 8: When plastering, the ratio of cement is not appropriate, and if the ratio is too high, it will crack.

Reason 9: The ratio of wall putty is inappropriate, or the scraping is not uniform.

Reason 10: The ratio of latex paint and water is not appropriate, resulting in cracking of the wall.

How to deal with the peeling of the wall:

1. Directly roll the brush topcoat to cover the part.

If it is a simple fading, it is generally recommended to take the way of a roller brush to cover a new round of primer and similar topcoat, but before construction, it is necessary to judge the quality of the putty layer of the wall at this time: choose the worst piece of the wall to fade with water, and then use a shovel to produce a shovel forcefully, if there is no chalking or falling off, you can directly use fine sandpaper to polish and smooth the treatment and brush the new primer and topcoat.

2. Scrape the peeling part and scrape the putty.

If the white wall or bare wall is partially bulging or slightly cracked and peeling, you can remove the problematic place, and smooth the edge of the shoveled part, scrape the putty again, apply primer, and brush again, but there may be a little color difference with the original wall.

3. Demolition of the old wall and comprehensive construction and refreshment.

Comprehensive construction is the same as redecoration, the amount of work is the largest, and it is suitable for walls with many cracks, peeling and powdering. First of all, the wall should be completely removed to the cement layer, if it is some houses that have not been renovated for a long time, it is necessary to remove the surface of the brick wall, and then fully construct and renovate the wall: level the wall.

Curing the base layer. Brush the interface agent.

Batch scrape three times of water-resistant putty.

Wall sanding. Apply primer.

Effect topcoat on twice.

4. Professional reinforcement treatment for the grassroots level.

1. Reasons for wall peeling: there are three main reasons, one is that the room is damp; First, the original base foundation construction is not firm; There is also a kind of construction process is wrong, not in strict accordance with the process and specification operation, resulting in wall paint peeling.

2. Wall peeling treatment method: it is necessary to remove the local shovel to the cement layer, brush the interface agent, then scrape the wall lining or waterproof putty 2-3 times, and then brush the primer, and pay attention to the construction below the moisture content (10%), and avoid construction in the environment of high humidity (85%) and low temperature (+5).

1. Generally, there will be a process of foundation settlement in a new house for one or two years. During the settlement process, the wall stretches, which will cause wall cracks or wall peeling and cracking. In the process of foundation settlement, do not rush to partially repair the wall, it is best to wait for the settlement period of 1-2 years to gradually stabilize before starting to repair the wall.

2. When the developer delivers the house, the wall is smoothed with plain ash, and the workers must shovel off the plain ash of the base layer and re-brush the primer when painting the wall. If the workers do not clean the base layer in the decoration, it will cause the wall to peel and crack for a period of time after brushing the latex paint.

3. Some decoration companies cut corners in order to save money when decorating for the owners, and the ratio of raw materials is unreasonable, for example, too much moisture in the paint.