What are the causes of cracks in the walls of houses

Not long after the renovation of the home, the walls cracked, which was really depressing. There are many reasons for wall cracking, and understanding the cause can prevent and solve the cracking problem!

What are the specific causes of wall cracking? There are several situations that will cause wall cracking, the first situation is the strong cracking of the wall structure, resulting in strong cracking of the structure, the main reason is the cracking caused by the uneven subsidence of the foundation.

The second situation is the cracking caused by the joint between the new wall and the old wall. So what is the cause of this cracking? The main reason is that the shrinkage ratio of the new wall and the old wall is different, resulting in cracking.

These three situations are the cracking of the putty base, so there are several reasons for the cracking of this situation, the first reason is the cracking caused by the failure to deal with the base layer. The second situation is that the proportion of raw materials when we paint is not right, resulting in cracking. Generally, wall cracks are caused by several reasons.

How to repair the cracks in the wall?

First of all, the structural cracking, the cracking of the structural wall needs to be about a year or so, and then re-repaired, the repair method is to shovel the cracked place, and then use caulking gypsum. Then re-apply the kraft paper and re-apply the cloth, so that there will be no cracking in the later stage.

The second is the cracking of the junction between the new wall and the old wall, which requires us to embed this gap in the construction process to paste kraft paper, and then hang the net so that it will avoid cracking in the later stage.

Like the third case, we need to shovel the cracked place in the process of repairing, and then re-caulk after shoveling, and then hang putty to paint after caulking!

The above is the solution to wall cracking and prevention, I hope to give some help to the owners of the decoration!

1. The leveling process of the wall base layer is not up to standard.

2. Rush the construction period, regardless of the actual site conditions and weather, and apply a layer of putty powder when the previous layer of putty is not dry.

3. The putty is scraped too thickly, and it is easy to dry the surface and not dry in the process of drying and curing, resulting in dry cracking; Or the stirring is uneven, resulting in blistering and cracking of the putty on the back wall.

There are many reasons for cracks in the wall.

Caused by uneven settlement.

There is a quality of concrete structure that is caused.

There is a lack of reinforcing fiberglass mesh between the masonry and the structure.

There is a result of the quality of the decoration.

There is water seepage from the outside.

There are temperature changes.

The following are normal cracks:

1. Cracks caused by cold shrinkage.

Thermal expansion and contraction are fundamental physical properties of many objects, but walls are no exception. The wall will also shrink unevenly due to temperature changes, resulting in some cracks, which are normal cracks if the cracks are not very large.

2. Cracks in the soil.

There are cracks inside the concrete itself, but this crack is not visible to our naked eyes, and its width is generally less than a millimeter. This type of crack is a normal crack and will not be affected if the building does not exceed the load.

3. Slight cracks caused by the lower floors of the house.

The foundation of some houses is relatively loose, and the building is prone to sinking in this situation for a long time. Obviously, some cracks will occur on the surface of the building when the foundation is sinking, and if it is a slight crack, it will not affect the building.

Summary. What happens to cracks in the walls of the house Hello, dear, common causes of cracking in <> 1. This situation caused by house settlement is generally more common in villas and high-rise houses; National house purchase*** Open in "WeChat" to join the group chat to join the group chat 1 Open the Fang Tianxia app, see more**2, "old wounds have not healed" often crack and straight, such as the temporary door opening opened by the developer during civil construction, and the seal is not in place after completion. In this case, if you look at it from a distance, you may see that the cracked part shows the shape of the door opening.

Or the water and electricity slotting parts are not repaired during the decoration. 3. Improper proportion, such as cement mortar when powder wall, batch of putty, latex paint mixed with water is manually blended, and the proportion is improper. 4. Climatic influences: If the wall construction is done under certain low temperature conditions, the temperature is too low and the moisture solidifies too quickly, which may also be caused.

For example, the coating construction is generally required to be more than 5, nearly a wide range of cooling, coating construction is easy to cause cracking, peeling and other adverse consequences, it is recommended that some areas should temporarily stop the coating construction. If you are in a hurry, it is recommended to turn on the indoor heating equipment to increase the room temperature. Hope it helps!

Hello. How the second floor of the new whole house has cracked.

It's long. What happens to cracks in the walls of the house Hello, dear, common causes of cracking in <> 1. This situation caused by house settlement is generally more common in villas and high-rise houses; National house purchase*** Lu Chao opened in "WeChat" to join the group chat to join the group chat 1 Open the Fang Tianxia app, see more**2, "old injuries have not healed" often crack and straight, such as the temporary door hole opened by the developer during civil construction, and the closure is not in place after the completion of the shed. In this case, if you look at it from a distance, you may see that the cracked part shows the shape of the door opening.

Or the water and electricity slotting parts are not repaired during the decoration. 3. Improper proportion, such as cement mortar when powder wall, batch of putty, latex paint mixed with water is manually blended, and the proportion is improper. 4. Climatic influences: If the wall construction is done under certain low temperature conditions, the temperature is too low and the moisture solidifies too quickly, which may also be caused.

For example, the coating construction is generally required to be more than 5, nearly a wide range of cooling, coating construction is easy to cause cracking, peeling and other adverse consequences, it is recommended that some areas should temporarily stop the coating construction. If you are in a hurry, it is recommended to turn on the indoor heating equipment to increase the room temperature. Hope it helps!

Hall**. The cracks are straight.

It's long. Hello, dear, [happy oozing] sedimentation cracks. The house will settle for a period of time after it is built, and it is normal for a small area to settle, but if the settlement is too large, it will lead to wheel cracks in the roof. Hope to help you!

Cracks in the walls of a house can be caused by several reasons:

1. Structural cracking, which is generally easy to appear in old houses. Because many old houses are brick and wood structures or masonry structures, and houses with this structure are supported by walls. Over time, these bricks lose their hardness due to corrosion or brilliance, which can lead to structural cracking.

2. Shrinkage cracking, which is the most common in daily life. It generally appears at the bottom of beams, the bottom of suspended ceilings, and the joints of some load-bearing walls and old and new walls. This is because the coefficient of thermal expansion and contraction is different depending on the material.

To put it simply, when two different materials or two things that were not made at the same time are put together in the dust, because of the difference in temperature and humidity, it will lead to cracking.

3. The problem of construction technology and materials leads to the cracking of the wall, which generally occurs in the renovation of the old house, because the original wall of the old house is ash. However, they were not removed during the renovation process, or they were not cleaned after being cleaned. It will lead to the newly scraped putty layer not sticking firmly, resulting in hollowing and cracking in the later stage.

Wall renovation:

After a long time, the walls will have a lot of aging problems such as molting, cracks or mold. When repainting the wall, the original wall needs to be redone. After solving those aging problems, it is necessary to use putty to level and smooth before brushing latex paint.

In particular, it is necessary to pay attention to the places where the walls are up and down and the top and the ground meet, which can be decorated with gypsum lines and baseboards.

Sticking wallpaper on the wall is also a relatively simple way to pretend to be a brother and sister. Before pasting wallpaper, the aging and problematic wall should also be treated with layers and smoothed with putty. After polishing smooth, apply wallpaper glue, choose the appropriate size wallpaper according to the size of the wall, and paste the patterns and gaps.

And the current wallpapers have a certain amount of waterproof and stain-proof, and it is relatively simple to clean up.

Some people will have cracks in the walls of their homes, so this onecracks in the wallAfter the situation appeared, everyone was very anxious, in a bad mood, and looked everywhere to solve the wall cracks, but to no avail, so what is the cause of the wall cracks? Do friends know? And after the appearance of this wall crack, our first task is to repair the wall crack, and this wall crack repair method is below the article.

First, the cause of wall cracks.

1. There are cracks in the insulation layer of the original house, which leads to cracking of the wall after decoration.

2. It is the improper repair and painting of the wall after slotting, which leads to the shrinkage of the wall and cracks.

3. The ratio of cement is inaccurate when plastering, and it is easy to crack if the ratio is high.

4. The situation is that the ratio of wall putty is improper or uneven scraping.

5. The ratio of latex paint and water is not suitable, and the above non-standard operations will lead to cracking of the wall.

6. The main reasons for the cracks in the concrete wall are the rotten causes of the concrete itself and the reasons in the construction process, and such cracks can be repaired by automatic low-pressure grouting. Automatic low-pressure grouting technology is a comprehensive technology developed by Beijing Metallurgical Engineering Crack Treatment Center for the field of concrete crack grouting including materials, machinery and tools. After grouting repair, the inside of the crack is filled with AB-1 grouting resin, and its tensile strength and adhesive strength are high, and no re-cracking will occur.

7. Cracks in brick masonry walls, cracks in new partition panels and cracks in walls of different materials belong to temperature live joints, which cannot be repaired by grouting due to the expansion and contraction of cracks, so flexible materials should be selected for repair (such as A12 high flexible joint patching material of Beijing Metallurgical Engineering Crack Treatment Center) This open repair method is a new burning concept, compared with the previous rigid repair, it is more suitable for crack treatment with a large amount of activity.

Second, the wall crack repair method.

1. Treatment of cracks in insulation boards. Use a putty knife to cut the crack as deep as possible and fill it with plaster. Pay attention to be sure to fill it up and fill it evenly.

Then use a bandage, bean cloth or white cloth to paste the cracked area, dry it, and then scrape putty or do other processes. If the crack is severe, you can also use kraft paper or newspaper to repair the joint, the effect may be better.

2. The reason for the cracks after the trunking is that the drying speed and shrinkage rate of the cement mortar are different from the putty powder, and the putty on the surface of the wall has been dried, and the cement mortar inside has not dried thoroughly, so cracks appear. Therefore, the effect of gypsum powder for the wire repair duct is better.

3. If the wall putty is scraped too thick at one time, or the thickness of the entire wall is too different, cracks will also occur. In severe cases, it will also fall off. If necessary, you should scrape several times, each time thinner and longer.

However, it should be noted that the putty is scraped more times and is easy to fall off.

If there is such a crack in the wall mold in our home in the future, you can follow the wall crack repair method in the above content of our article to learn, and the actual reference is the reason for our wall cracks, I hope friends will try to avoid it in the future.

After the renovation was completed, the big stone in my heart also fell to the ground. However, if the surface of the decorated wall is cracked, it is a very annoying thing, which not only seriously affects the aesthetics of the house, but also causes some safety uneasiness. So what are the causes of wall cracking?

How it should beCrack repair of wall cracksFirst, the main reasons for wall cracking:

1. Waste engine oil is used as the template coating agent for concrete construction.

2. The concrete surface is not brushed or the quality of the brushing is poor.

3. Build broken bricks on the wall.

4. Blind false joints in masonry.

5. Defects in masonry openings.

6. Construction defects of inclined roof bricks.

7. Poor handling of hanging nets on the junction surface of concrete and masonry.

8. The pipeline is slotted and fixed.

9. The pipeline duct is not blocked and directly painted.

10. Watering time of sintered masonry.

11. Cracking around the larger box.

12. The thickness of the plastering single layer is too thick or the mortar king is used 13, and the plastering surface is not cured in the dry and high temperature season, and the plastering surface is slotted and threaded.

14. After the hollow drum is repaired, the second cracking and hollowing of the drum.

Second, the wall crack repair method.

1. Remove the wall.

Sprinkle water on the wall first, wet the wall and then shovel, so that the shovel is more labor-saving, and the wall skin is removed to expose the cement mortar wall or putty layer.

2. Repair. After the old wall skin is removed, apply an interface agent to the wall, paying attention to the uniform application. For the cracks, special treatment should be carried out, and the cracks should be pasted with kraft paper tape and white latex to prevent further cracking.

In addition, it is necessary to level the uneven wall, generally gypsum is more commonly used, and the uneven difference does not exceed the centimeter, and then paste: generally light walls and insulation walls and other non-load-bearing walls need to be pasted.

3. Scrape putty ready to scrape putty. The quality of putty is related to the effect of construction, it is better to choose putty with higher particle fineness and harder texture, and you can also add a certain amount of white latex to improve the hardness of putty. After the putty is dry, it also needs to be sanded on the wall.

After sanding, the wall must be thoroughly cleaned to avoid too much dust and affect the adhesion of the paint.

4. The surface treatment should be painted on the wall. You can put a little more water when mixing the primer, which makes it easier to brush evenly. When painting, make sure to ensure that every part of the wall is painted, so as to ensure the effect of construction.

After the primer is completely dry, you can brush the topcoat, when brushing the topcoat, do not add excessive water, the hair of the drum should not be too short, but it must be fine. The latex paint will dry 4 hours after painting, but do not scrub or touch the wall for 7-10 days.

The above is the detailed answer about it, I don't know if you are satisfied with our introduction.