What should I do if there is a crack after plastering the wall?

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. Cut the surface of the mortar and apply it to expose the inner wall. Check the specific situation of the gaps in the wall.

Normally, we can clear the gaps, fill the inside 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.

It is mainly due to the large dry shrinkage and fast drying of some plastering mortar and putty products, which produces large internal stress and destroys the mortar structure and causes cracks, and the performance of cracks is generally irregular cracks, which is often called cracks.

The strength and anti-cracking effect of cement mortar have an important relationship with water, and the hydration and condensation hardening of cement is a gradual and continuous process, first hydration, and then condensation;

The more fully hydrated, the better the water curing, and the longer the water curing, the higher the strength, the smaller the shrinkage, and the better the anti-cracking effect.

Cracks in the walls of new houses are a common decoration problem. There are many reasons for this, such as the wall being too thin, the cement paint on the wall before it dries, the original structure, or the stuffiness of the penthouse. It's a good idea to work with the renovation company or builder to find out why.

If there are too many cracks to be repaired one by one, there is a better remedy, you can go to the market to buy special linen for painting, paste the linen to the wall with white glue, and then apply cement paint after drying, so that the wall can generally be guaranteed that there are no more cracks, and play a role in strengthening the wall.

Most of the wall cracks are caused by cracks in the cement of the wall, or cracks in the joints of the wall "insulation board", or cracks at the lap of the old and new walls, or cracks at the junction of the trunking and the original wall after the plumber slots, most of which are not quality problems of decoration, but insurmountable defects in the building. In pursuit of the best decorative effect, it is possible to compensate for the architectural defects with decoration:

1. If there are cracks in a large area, chisel the bottom of the wall at the crack into a "U" shape, and the spacing of the "U" grooves is greater than 20cm, and the chiseled base is chiseled, and then the steel wire mesh is hung.

2. After the wall substrate is cleaned, a layer of good cloth, kraft paper or newspaper is pasted on the wall, and the tension of the fiber is used to ensure the integrity of the latex paint film. This method is relatively simple and easy, but the results are modest.

3. Remove the insulation board on the surface of the wall, or remove the cement wall, install a layer of gypsum board or "five-centiboard" outside the insulation layer, and then make latex paint on it. This method can remove all the irregular cracks, and the cracks are generally the joints between the plates, which are easier to deal with. However, this method is expensive and difficult to construct.

4. Adopt decorative materials with elasticity. At present, there is a kind of "elastic putty" that can compensate for the problem of cracks in the walls to a certain extent. A certain wall paint can also play a role in covering small cracks in the wall.

However, these materials themselves are less "elastic" and do not work on walls with strong cracks.

5. Some consumers simply remove the insulation layer of the wall. Although this method can be used once and for all, it will reduce the thermal insulation and insulation performance of the wall, so it is not recommended to use it.

6. The wall of the construction hole on the civil engineering is built later, and if it cannot be naturally connected with the original wall, cracks will occur, so the bricklayer must be staggered and plastered, otherwise the painter can not completely solve the problem of cracks even if it is a fitting cloth.

7. After the decoration of the living room is completed, a basin of water can be placed in each room to maintain the humidity of the indoor air, which can effectively prevent the cracking of the wall.

The reasons for this may include:

1. The wall is too dry, no water is sprinkled in advance, and the moisture in the cement mortar volatilizes too quickly and causes cracking.

2. Failure to do it in accordance with the operation specifications, the one-time plastering is too thick and causes cracking.

3. The cement grade is too high, and the wall moisture is insufficient and lacks maintenance, resulting in cracking.

There are a variety of reasons for this. If the water is not moistened. The plastering is not layered. Wait.

Paint old and new walls or cracks before they are repaired.

Question 1: The flatness of the base layer is poor, and if the local primary plastering layer is too thick, the dry shrinkage rate is also large, 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.

Answer 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.

Question: Does the paint you just painted have fine lines, will it worsen?

If the lines are small, the putty may not be dry at that time to brush the latex paint, after drying to cause cracking, if there are many cracks, shovel off the putty and redo it, if it is less, slightly repair the latex paint.

If the pattern is large, it may be that there are cracks in the original wall, shovel off the putty, paste the cloth on the cracks, and re-scrape the putty to paint it.

The answer to the "internal cause" aspect is mainly due to the large dry shrinkage and fast dry shrinkage of some plastering mortar and putty products, which produces large internal stress and destroys the mortar structure and causes cracks, and the performance of cracks is generally irregular cracks, which is often called cracks, mainly because some manufacturers do not have a full understanding of the properties, functions and technical principles of raw materials, and the raw materials used do not meet the requirements, and the formula is not scientific, resulting in unstable product quality and poor crack resistance. Shedding problems.

The strength of cement mortar, anti-cracking effect has an important relationship with water, cement hydration and condensation hardening is a gradual, continuous process, first hydration, then coagulation, how the result of condensation hardening, depends on the hydration conditions, the more fully hydrated, the better the water curing, the longer the water curing, the higher the strength, the smaller the shrinkage, the better the anti-cracking effect; The hydration and coagulation and hardening speed of cement are also obviously affected by the ambient temperature, that is, the hydration and hardening speed is fast when the ambient temperature is high, and the hydration and condensation hardening speed of cement is correspondingly slower when the ambient temperature is low. All cement mortar that dries early, hardens early, and is strong early, due to poor water retention and poor self-maintenance ability, will shrink too fast, shrink too strong, and easily produce large-scale cracks. In research and practice, the later strength, stability and crack resistance of early-drying, early-hardening and early-strong cement mortar are worse than those of late-drying, late-hardening and late-strength cement mortar, which is also determined by the particularity of cement as an inorganic hydraulic cementitious material.

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 the white mesh tape to paste the seamed wall and scrape it with quick-drying powder, and finally apply putty powder.

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.