There are some cracks in the wall plaster, how to deal with it?

In this case, it is necessary to open the window for ventilation to remove moisture from the room, and at the same time remove the cracked area and re-plaster.

If there is cracking in the wall plastering, it is likely that the proportion of gypsum cement is not right, and this situation should be adjusted as soon as possible to avoid greater problems in the future.

You can buy a special coating or repair adhesive online for repair.

Causes of cracks in plastered walls:

1. The flatness of the base layer is poor, and the dry shrinkage rate of the local primary plastering layer is too thick, which is easy to cause cracking.

2. The plastering base is not cleaned. If the base layer is not carefully cleaned before plastering, the adhesion between the plastering layer and the base layer will be greatly reduced, or some places are large, and some places are small, so that the plastering surface will crack due to too small or unbalanced binding force, and even fall off and hollow.

3. If the mortar mix ratio is not strictly grasped in the construction, the mix ratio fluctuates greatly, and the mortar slump difference is too large; Depending on the degree of wetting of the base layer, the degree of mortar shrinkage will be different, and cracks may occur.

Quality Issues:

1. Poor bonding, hollowing and cracks: The bonding between the stucco layer and the substrate is not strong, hollow and cracked. The main reason is that the base is not clean, washed with water, not wet enough, and the surface of the concrete is not coated with interface agent.

Due to the strength growth and hardening process of the mortar, it produces uneven shrinkage stress and forms dry shrinkage cracks. Cracks, frosting, and peeling of cement mortar walls.

2. The plastering layer is too thick: the thickness of the plastering layer greatly exceeds the regulations, especially if it is a success, the plastering layer will be cracked. The thickness of the plastering layer should be controlled by punching bars, and it is advisable to keep it at 20mm.

During the operation, it should be layered and intermittently plastered, and the second time should be wiped after the first time the ash is finally set, and it should not be survived once.

3. The side seams of the door and window frame are not stuffed with ash or the ash is not solid, and the hollow drum and cracks are produced on both sides of the window frame, and the door and window seams should be regarded as a process by a special person, and the side seams of the door and window frame must be filled with cement mortar or fine stone concrete after the foaming agent is played to prevent cracking and water seepage.

The phenomenon of cracks in the plastering layer of wall plastering is a common problem in wall plastering projects. The common quality problems of construction projects are some common engineering quality problems that often occur in construction projects. Due to its large quantity and wide coverage, it is also very harmful to the quality of construction projects, and it is also the main obstacle to further improve the quality of projects.

Therefore, in the construction process, according to the phenomenon (characteristics) of each common quality problem, the causes are analyzed, and the corresponding preventive measures and treatment methods are made to ensure the quality of the project. Grassroots treatment.

1. The obvious parts of the concrete surface should be flattened in advance or flattened with 1 3 polymer cement mortar.

2. Before painting or chemical texturing, the wall dirt should be removed, and the water should be moistened in advance (the inner wet surface is dry).

3. The concrete base should be manually chiseled or chemically textured; The lightweight block base should take measures such as chemical texturing or full laying mesh to enhance the cohesion of the base layer.

4. The scaffolding holes and holes of the external wall should be plugged in layers, and a waterproof reinforcement layer should be added to the outside of the hole.

5. At the junction of different material substrates, anti-crack mesh or glass fiber mesh must be laid, and the lap width between the substrate and each substrate should not be less than 150mm

Exterior plastering. 1 Design.

1) The surface layer should be mixed with polypropylene anti-crack fiber.

2) The plastering surface layer must be provided with lattice joints.

2 Construction. 1) Rough scraping should not be less than twice, and the thickness of each time should be 7-8mm, but should not exceed 10mm; It should be 7-10mm.

2) The mud content of the sand used for exterior wall plastering should be less than 2%, and the fineness modulus should not be less than. It is strictly forbidden to use stone powder and mixed powder.

3) The scraping layer on the concrete or sintered brick matrix should be 1 3 cement waterproof mortar, and the lightweight masonry should be 1 1 6 waterproof mixed mortar.

4) Before each plastering, the quality of the plastering (hollow drum, cracks) of the previous pass must be checked and treated (the hollow drum should be heavily powdered, and only the cracks should be closed with cement slurry) before proceeding; The spacing time between the two layers should not be less than 2-7d, when the winter construction conditions are reached, the exterior wall plastering construction should not be carried out, and the joint position of each plastering layer should be staggered, and should be set in the middle of the concrete beam and column.

5) when the total thickness of the plastering layer is 35mm and 50mm (including the thickness of the base repair), the measure of hanging the large-hole steel wire mesh must be adopted, and the depth of the fixing parts of the fixed mesh into the concrete matrix should not be less than 25mm, and the depth of other substrates is not less than 50mm; When the total thickness of the plastering layer exceeds 50mm, the design unit should propose strengthening measures.

6) The external window sill, waist line, outer overhang plate and other parts must be powdered with a drainage slope of not less than 2%, and the root of the wall should be powdered into a rounded corner; The width of the drip line should be 15-25mm, the thickness should not be less than 12mm, and it should be powdered into an olecranon type.

If there are cracks in the walls, many people will go to the developer to question the quality of the house. There are many kinds of cracks, and cracks are in the painted walls, and it doesn't matter whether they are important or not. Cracks caused by foundation causes are uneven foundations.

This crack is that the foundation of the house is not strong, the weight of the house itself is transported by the foundation, and the weight is transferred to the foundation under the action of gravity and the gravity of the earth. On the basis of uneven forces, the foundations have some different degrees, and the foundations sink. If the foundation of the ground beam is not up to standard.

The weight of the house and the gravity of the earth are sunk by the beams, and the walls will crack.

Temperature changes. Sometimes thermal expansion, cold shafts can also bring cracks to the walls. The raw materials used to paint the walls are cement and sand.

Cement is stone-like alkaline when solidified, but it also has a temperature that adapts to it. The temperature of the weather directly affects the setting time of cement. If you smear the cement ash on the wall, if the water is wet, the cement ash will solidify on the wall for a long time.

The walls are too wet, and the cement ash peels off easily and cannot be smeared. The higher the temperature, the faster the moisture loss of the walls, and the same uneven humidity. There will be a lot of dry cracks.

This kind of crack should be called a crack. Common on walls, with no actual destructive power, no threat to walls at all. When you scrape the white, you can use greasy powder to directly base the cracks, and you can repair the cracks in one go.

Penetrating cracks are cracks that appear on the plaster on our walls that are very regular and uniform. For example, horizontal cracks or vertical cracks. The width of these cracks is generally up to 2, 3 mm, but the depth is almost the entire wall.

That is, from one wall to another. Where two different walls intersect, the force contracts different cracks. For example, shrinkage cracks that appear at the junction of our newly built walls and the old walls we used to build at home.

In addition, this is because we did not set up rubber bands as needed when building the wall or did not do a good job of dealing with the gaps. Penetrating cracks caused by structural settlement. This type of crack is generally irregular, but it is a very serious penetrating crack.

For example, there were penetrating cracks in the brick walls of my house. cracks under the roof. The cracks under the roof are all because when we built the wall, the top of the wall was not tilted.

We need to apply the crack area first. The mortar on the surface is cut and applied to expose the inner wall. Check the specific situation of the gaps in the wall.

Normally, we can clear the gaps, fill the interior with unexpanded cement, or fill with unexpanded concrete. When I reach knot strength when I fill it up, we can hang wire mesh painting on the surface. Finally, these more severe penetrating crack repairs are completed.

I think that this is the time to repair the wall, and I can repair the wall by applying putty to the cracks.

Personally, I think that if there is a crack in the wall after plastering, it is likely that it is a little dry, and at this time it is necessary to spray some water on the wall.

Generally, the mortar cement ratio is too high, resulting in cracking of the wall. If possible, remove and rework, or cover up with decorations to achieve an aesthetically pleasing effect.

We can gently tap the crack where there is, if there is a hollow drum sound, it should be removed and scraped again, if it is still solid, you can scrape the putty for the second time, but the putty must remember not to scrape a thin batch again, so that there will be no cracking. There are many reasons for cracking, and I want to scrape the putty powder again, the treatment method is not much different from the redecoration, the order of the construction process is the same, the putty powder is cracked, there may be a material selection that is not suitable, wall decoration, it is very important to choose the decoration materials suitable for wall decoration.

<> this kind of shape appears, in the case of excluding the cracking of the wall itself, your original putty Zhongri Luo plus a little white powder with a steel spade or horn spade to the crack and flatten, polish and then paint. If there is a crack on the wall, this is a quality problem of putty, because add a little construction glue to adjust and then adjust, and repeat it once. How can the wall affect the putty powder decoration on the surface?

This problem is not difficult to understand, for example, after the putty powder is scraped on the wall, the wall cracks due to some reasons, and the putty powder on the wall will also crack. Shovel to the edge of the empty drum and then 10 cm, and then repair and level, (repair according to the hollow drum situation) one situation is the problem of the strength of the worker's construction skills. In addition, there is a situation where high-rise buildings are more prone to cracks, but they are very fine (in this case, it is recommended that you choose wallpaper or wall cloth on the wall to solve the problem).

Let's take a look at what kind of cracking it is, there are three possibilities, the first is the cracking of the wind, the second is the hollow cracking of the original wall, and the third is the cracking of the original wall material. Don't be in a hurry to scrape the putty for the second time. So the best way is to shovel off all the cracked wall skin, and then use white mesh tape to paste the seamed wall and scrape it with quick-drying powder, and finally putty powder on it.