How to deal with wall paint cracking, how to deal with exterior wall paint cracking

The first is that the quality of the wall base material is poor and the strength is low. The main thing is putty, if you use poor quality putty powder, the general water resistance is relatively poor, the paint is liquid, the main ingredient is also water, the putty that is not resistant to water will appear pulverized after encountering the paint, which may lead to hollowing, and then cause cracking.

Second, the situation is that the putty batch is too thick, dry and shrink. Generally, the material of the wall base is prone to cracking if the batch scraping is too thick and lacks maintenance. For example, cement, many home decoration use cement to pursue quick drying, this.

In fact, it is not very scientific, because the process of cement gradually firming (that is, increasing strength) is a process that requires a relatively long time to retain water, and if it dries too quickly, it is easy to depowder, cracking and other phenomena.

Third, the situation is that the crackable parts are not well treated with anti-cracking. Generally, you will encounter internal insulation walls, sand-plaster walls of old houses, light walls (including new construction), poor quality of base materials such as cement or gypsum, the junction of the two walls, slotting left by hydropower renovation, and crackable parts around construction holes.

First use putty to fill the cracks with obvious cracking effect, then smooth them with a sand cloth, and finally paint the wall!

You can take a look at the Tianfu decorative net, which has all kinds of putty... It should solve your problem, good luck o(o

There are many types of walls, including mono-material walls and composite walls. It is an important task of building structure to comprehensively consider the factors such as enclosure, load-bearing, energy saving, and aesthetics, and design a reasonable wall scheme.

The reason for the cracking of the exterior wall paint may be that there are cracks in the matrix of the wall eggplant, and the putty is scraped without treatment. Treatment: It is very troublesome, it is best to shovel off the coating, expose the base layer of the wall, paste the bandage in the place where there are cracks, and then brush the glue and scrape the putty at least twice, and apply the paint.

The second reason: the putty is not dry (moisture content "10%).

Treatment: Make the thickness of the putty uniform and polished, don't be greedy, and then check the paint after the putty is dry, otherwise the wall will crack in a few months.

This answer applies to wall paint cracking in most cases.

1. If the crack is relatively small, the treatment method is relatively simple. Use a knife to cut the crack directly, then use coarse sandpaper to polish the crack again, and after the polishing is done, you can paste the caulking with white glue, then level it with putty, and then brush the latex paint. 2. If there is local cracking, the cracked part should be removed first, and then the anti-cracking putty should be brushed, and the latex paint can be brushed again after polishing, so as to ensure sufficient flatness.

3. Once the latex paint wall falls off in a large area, the wall plastering must be completely removed, scrape a layer of gypsum board or put it on the wall, and then apply a layer of latex paint. The reasons for this problem: 1. The wall may be unclean, with dirt, water or other pollutants.

2. The surface of the wall primer may be too smooth, and the bottom polishing is not enough to stool or there is no polishing at all. 3. The primer and the topcoat may not match or have poor compatibility, the primer is made of nitro, although the nitro paint is not completely dry, but the primer containing a relatively stronger solvent is used, resulting in no obvious undercut or even cracking of the topcoat. 4. It may cause cracking due to the different linear expansion coefficient of the surface layer when it is affected by the effect of wood machinery.

5. It may be that the bottom layer of cement is not completely dry, and the lime is too alkaline. 6. It may be that the construction environment is too bad, the temperature is too low, the temperature difference is large, the humidity is large, and the paint film expands and contracts under the action of cold and heat, resulting in cracks.

1. You can use a shovel to remove all the putty layer and paint on the cracked wall, and then clean up the dust on the wall. 2. Then repair and smooth the cracked place of the wall with cement mortar, and after the cement mortar is completely dry, it is also necessary to hang a net or paste a nylon mesh cloth with relatively high strength. 3. Finally, scrape putty and paint latex paint on the wall.

1. First of all, you must choose putty with good quality; The second is that when scraping putty, the putty layer should not be too thick, and try to keep it within 5 mm; Another thing to say is that before painting putty, if you find that there are cracks on the wall, it is best to do a good job of anti-cracking treatment.

2. Painting the wall in winter, especially prone to cracking, mainly because the climate in winter is relatively cold, but if the floor heating is installed at home, then the floor heating can be turned on, and the temperature at home reaches minus 5 degrees before construction, so that the probability of cracking on the wall is very small.

3. Before painting the wall, you must first level the wall, and the leveling material can choose to use putty powder, if the wall is not leveled, then the wall will not only crack, but also bulge.

4. The wall paint used is not up to standard, or the thickness of the wall paint is uneven when the workers are constructing, and they are not patiently polished, resulting in cracking of the wall paint.

Recently, many friends have reported that not long after the renovation was completed, the wall has cracked to a certain extent, which greatly affects the aesthetics of the wall. So, what causes cracking in wall paint? How to fix it? Today, I will analyze the causes of cracking for you.

1. What is the cause of wall paint cracking?

1. The cracking of the wall paint caused by the cracking of the wall is mainly the reason for the drop in the foundation sinking;

2. At the splicing of the new wall and the old wall, the joints are cracked due to the different shrinkage ratios, resulting in cracking of the surface wall paint;

3. The base layer of putty powder is not done, and the cracking of the putty powder layer leads to cracking of the wall paint.

Second, how to repair the crack of wall paint.

1. Cracking of the paint surface.

Use fine sandpaper to sand the cracks off, choose latex paint of the same color, and repaint. During the construction process, it should be noted that the best wall paint should be selected, and the construction should be deployed in strict accordance with the manufacturer's instructions to avoid mixing too much water, and the previous paint should be dried and then brushed a second time. Note that the construction temperature is above 10.

2. Cracking of the mortar layer.

To repair this kind of crack, the putty layer must be removed first, the cracks in the mortar layer are exposed, and then the steel wire mesh is hung. If there is a large area of hollowing in the mortar layer, the original mortar layer should be knocked out, the steel wire mesh should be hung and the plastering layer of cement mortar should be re-done, and then painted according to the normal process after leveling.

3. Cracking of the putty layer.

The cracks can be cut with tools, filled with caulking plaster and polished and leveled, hung with mesh cloth, and then leveled with putty, and finally painted according to the normal process. During the construction process, it should be noted that the foundation work should be done before painting, and the net sticker should not be ignored, it is recommended to choose the finished putty and apply it evenly, and then paint the putty after it is dry.

4. Cracking at the junction of the old and new walls.

For relatively large cracks, the original putty and mortar layer should be shoveled, the steel wire mesh should be hung and the mortar should be scraped again, and the putty should be scraped. For smaller cracks, the original putty layer should be removed, the mesh cloth should be hung and the putty should be scraped again.

Article summary: The above is all about what is the cause of wall paint cracking. If you are not strong in hands-on ability and have no experience, it is more secure to hand over the seam to a professional master to operate.

When decorating the wall, in order to make the wall more high-grade and more beautiful, many people will consider painting the wall, but after a long time, the paint surface may crack, so what is the reason for the cracking of the paint? How do you repair a crack after it has been cracked? Today, I will explain to you the specific repair method.

1. How to repair cracks in the painted wall.

First of all, use a shovel to remove all the putty layer and paint on the cracked wall; secondly, clean the dust on the wall; Then the cracked place of the wall is repaired and leveled with cement mortar, and after the cement mortar is completely dry, it is also necessary to hang the net with hand dust or paste the nylon mesh cloth with relatively high strength; Finally, the wall is scraped with putty and latex paint.

Second, the reasons for the cracking of the painted wall are good potatoes and oranges.

1. The foundation of the house has subsided, resulting in cracking in the structural layer of the house.

2. The quality of the cement mortar used by the developer when building the house is relatively poor, and the joints of the wall are cracked.

3. The quality of the putty used in decorating the house is relatively poor, and the construction process is not in place, resulting in the cracking of the putty layer.

4. The wall paint used is not up to standard, or the thickness of the wall paint is uneven during the construction, and there is no patient polishing, resulting in cracking of the wall paint.

3. How to prevent wall cracking.

First of all, you must choose a good quality putty; The second is that the putty layer should not be too thick when scraping putty, and try to keep it within 5 mm; In addition, before painting putty, if you find that there are cracks on the wall, it is best to do a good job of anti-cracking treatment.

Fourth, is it easy to crack when painting wall paint in winter?

Painting the wall in winter, especially if it is prone to cracking, mainly because the climate in winter is relatively cold, but if the floor heating is installed at home, then the floor heating can be turned on, and the construction will be carried out when the temperature at home reaches minus 5 degrees, so that the probability of cracking the wall is very small.

Tips: Before painting the wall, be sure to level the wall, the leveling material can choose to use putty powder, if the wall is not leveled, then the wall will not only crack, but also bulge.

When decorating a house in life, wall decoration is an important part of the home decoration process. So how to deal with wall cracking in interior decoration? How to inspect empty wall cracks? Why do walls crack? What are the dangers of a broken wall? I.

1. How to deal with wall cracking in interior decoration.

1. First of all, the gray sand on the wall must be cleaned, and then the gray patches must be dried at speed, and finally the construction is done with putty. For methods that are difficult to repair, the method of repairing the crack can be adopted, that is, a high-strength adhesive, such as resin AB grout is injected into the position bin, this method is convenient, and it will not cause damage to the base layer.

2. The cracks caused by the temperature basically do not have an insulation layer, how to deal with wall cracking in interior decoration If the temperature of the surface layer is increased and the insulation layer is formed, the cracking of the wall surface can be effectively prevented.

3. How to deal with wall cracking in interior decoration, the cracks in the house can be fixed in the building, and can be repaired by cement slurry injection method. In other words, the developer must make a preliminary judgment at the beginning of construction. The settlement period is a process, so be careful.

If the settlement is uneven, it can be processed on time.

4. Structural cracks are caused by insufficient bearing capacity, you can add steel bars to the wall to increase the bearing capacity of the wall, or protect the wall to protect the wall from cracks.

Second, the cause of cracking of the interior decoration wall.

1. Typically the temperature difference between the cracked load-bearing wall, and later at the intersection of other building materials such as the crack between the next door 2 and the wall of the building sinks and cracks, the house facing the house will be built during the settlement period, the settlement is not uneven, and the crack is generated when the tensile force is greater than the wall;

3. Due to the lack of long-term bearing capacity of the wall structure, it will also cause cracks and cracks in the wall.

4. If there are cracks in the cement plaster layer, when you paint the wall, the ratio of cement to yellow sand will be wrong, resulting in cracks in the latex paint.

5. Cracks in the putty layer, which are usually caused by too thin putty layers.

Editor's summary: There are always several reasons why a wall cracks. Before we repair it, we must understand the cause of the wall. Using the right method can effectively prevent cracking.

Analyze specific problems, explore the causes first, and prescribe the right medicine.

temperature cracks, the design and construction of separate warehouses, leaving room for expansion.

Humidity cracks, pay attention to the use of cement mortar base, have a certain air permeability and support strength structural cracks, base to strengthen the structural structure and stability design and construction cracks, remove surface cracks for reconstruction, pay attention to the protection of finished products.