What s going on with cracks in small high rise walls

The most common cracks are the following:

1) Cracks caused by uneven settlement of the foundation.

The morphology of cracks in uneven settlement of foundations is varied, and some cracks have changed over time, and the crack width is wide, sometimes as wide as several centimeters. Cracks are mainly divided into shear cracks and flexural cracks. The common cracks of uneven settlement of foundation are:

Positive figure-of-eight cracks and oblique cracks. Settlement cracks mostly appear in the middle and lower parts of the house, and the cracks that occur in the middle and lower parts of the house are larger than the upper part of the house.

Generally, in the lower part of the building, it develops from bottom to top, showing the figure of "eight", the figure of "eight", horizontal and vertical joints. When the settlement in the middle of the elongated building is too large, a positive "eight" joint is formed at both ends of the house from bottom to top, and it first breaks through at the opposite corner of the window; On the contrary, when the settlement of the two ends is too large, the two ends of the formation first break through at the opposite corner of the window, and can also break through at the middle window sill of the ground floor to form a vertical gap from top to bottom; When one end sinks too much, an oblique crack with high settlement end is formed at one end; When the settlement at the intersection of the longitudinal and horizontal walls is too large, a vertical gap with a width at the top and a narrow bottom is formed at the lower corner of the window sill, and sometimes a horizontal gap along the lower corner of the window sill; When the outer longitudinal wall is concave and convex, due to the uneven settlement of one side, it can also lead to the formation of a horizontal thrust here to form a couple, resulting in a vertical joint at this junction.

2) Cracks caused by temperature changes.

The most common temperature cracks occur on the top floors of concrete flat-roof houses, at both ends of the walls and gables. For example, the oblique cracks on the edges of doors and windows, the oblique cracks on the upper part of the gable, the horizontal cracks under the flat roof or the brick (block) ash joints under the roof ring beams, and the horizontal corner cracks (including parapets). Temperature cracks are the main cause of early cracks in walls.

These cracks generally stabilize after a winter and summer, and do not continue to develop, and the width of the crack changes slightly with the change of temperature. There is an obvious regularity in temperature cracks: the two ends are heavy and the middle is light, the top layer is heavy and light, and the yang side is heavy and the shade side is light.

Thermal expansion and contraction are the basic physical properties of most objects, and walls are no exception. Because the temperature change is uneven, the wall produces uneven shrinkage, or the expansion and contraction of the wall is constrained by the unevenness, and the temperature stress exceeds the strength of the wall, and causes the wall cracking. It is common that the length of the wall is too long, and the expansion and contraction of the wall is large at the upper layer and small at the foundation, causing cracking.

Therefore, expansion joints should be set according to the requirements of the specification. In addition, due to the concrete roof, the temperature expansion coefficient of the concrete ring beam and the wall is different, which will cause cracks in the wall when the temperature changes.

3) Cracks caused by special masonry materials.

For example, the main reason for the cracking of masonry such as small concrete hollow blocks and lime sand bricks is that the vertical joint mortar is difficult to fill and the special structural requirements cannot keep up. The latter generally uses autoclaved lime sand bricks in the southern region, due to its own sensitivity to temperature difference, smooth surface and other particularities, although the appearance and size indicators are good, but in the actual use of the strict lime sand wall construction procedures are not familiar, lack of use experience, resulting in the existence of clay bricks in addition to the common cracks, but also common in the long wall section and the vertical cracks under the window sill of the exterior wall.

It may be due to the latex paint painted on the putty before it dries, or it may be a problem with the wall itself, which needs to be signed by the property.

Summary. Kiss, <>

We're glad to answer your questions! Very dangerous: If there are cracks in the house, of course it is very dangerous. First of all, we have to figure out which area of the house this crack is located, if it is a crack on the load-bearing wall, then this situation is very serious, and the vertical crack in the wall is likely to be a crack caused by the drying of cement, if the crack is not particularly large, it will not have any impact on the quality of the house, but if it has reached about 2 mm to 5 mm, then it will definitely affect the quality of the house. There is even the possibility of a house collapsing.

Hope mine can help you! <>

Is there a danger of small cracks in the wall?

Kiss, <>

We're glad to answer your questions! Very dangerous: If there are cracks in the house, of course it is very dangerous. First of all, we have to figure out which area of the house this crack is located, if it is a crack in the load-bearing wall, then this situation is very serious, the vertical crack in the wall is very clear, it may be because of the crack caused by the drying of the cement, if the crack is not particularly large, it will not have any impact on the quality of the house, but if it has reached about 2 mm to 5 mm, then it will definitely affect the quality of the house. There is even the possibility of a house collapsing.

I hope mine can help you! <>

Are you there. It's by the window.

between one millimeter and two millimeters.

At the window, one millimeter to two millimeters.

Kiss: If the gap is not big, it will be too big a problem<>

High-rise buildings due to the sinking of the foundation, resulting in wall cracking can be abnormal, because whether it is a high-rise residence, or a low-rise residence, because of the foundation sinking of the problem, resulting in the cracking of the wall, are more serious housing quality problems, should be carefully organized by the relevant departments to find out the cause, according to the cause of the development of remedial measures, timely dust and proper treatment, must not affect and endanger personal safety.

Presumably, many people will find that there are such and such decoration problems at home after living in a new house for a period of time. Among the many problems, cracks in the wall are also more common to us. Many people don't know why this problem occurs, so I'll talk about itThere are cracks in the walls of high-rise buildingsreasons andThere are cracks in the walls of high-rise buildingsprocessing.

1. If there are cracks in the insulation layer of the original house, the walls of the house will crack after renovation.

2. If the wall is not painted and repaired after slotting, it may cause the wall to shrink and crack.

3. When plastering the wall, the proportion of cement slurry is not accurate or the scratches are uneven. These irregularly constructed operations are also prone to cracking the surface of the wall.

4. Also, if the walls are too thin and the cement is painted on the walls without drying, the walls will crack due to the overheating of the house.

1. If there are cracks, we can first use special tools to cut some cracks, and prepare for the reeds to be filled with gypsum. Then glue the cracked area with a bandage, imitation tape or white cloth, wait for it to dry again, and then scrape off the putty. If the crack is severe, you can also sew it with kraft paper or newspaper, and the results may be better.

There are cracks in the walls of high-rise buildingsMost likely due to the drying of the cement mortar. This is because the drying rate and shrinkage rate of cement mortar are different from the drying rate and shrinkage rate of powder putty. After the putty on the wall is dried, the cement of the cement does not dry, so cracks appear.

3. There are cracks in the wall of the building, and there is also a situation that the surface of the putty is too thick, or scraping too much at the same time, which will cause the wall to crack and drop seriously. If necessary, you should shave several more times. The interval should be longer each time it is thinner.

However, it must be taken into account that the putty scratches too many times and can come off easily.

You can get it for free

Cracks in the wall, I think you must have encountered them, and when you encounter this situation, you must take measures to repair them, otherwise it will affect the appearance. However, before the implementation, we should know what happens to the cracks in the walls of high-rise buildings, what are the causes, and today I will take you to see the causes of wall cracks and how to deal with wall cracks.

1. Defects in the building will cause the wall to crack.

Some problems with the quality of the house itself, such as cracks in the insulation layer, improper wall repair and painting, etc., will lead to cracks in the wall after renovation. If this is the reason, just repair the crack Li Yuanshi's place, use elastic putty to make the base, adhesive tape, and then flatten the whole crack, and then make the primer and topcoat. Turn.

2. The putty batch scrapes the cracks that are too thick.

If the batch is too thick when the putty is used at one time, uneven drying will occur, which will lead to cracking. This type of crack usually occurs in the corners of the wall or when the wall is uneven. To solve the problem of cracking the wall, simply polish it locally and then repair it with putty.

3. Cracking of cement mortar paste layer.

When plastering walls, the cement mortar does not dry and undergoes ashing, which causes the cement mortar to dry and crack, resulting in cracking of the latex paint after the decoration is completed. In this case, the cracking of the wall should be corrected. It's a bit of a hassle.

If there are irregular cracks throughout the wall, they need to be removed and reconstructed.

4. When the wall latex paint cracks and applies the primer, do not wait for the previous application to dry and start brushing again. The shrinkage rate is different, and the lead limb causes the topcoat to break. If it is only a crack in the surface paint film, wipe the crack with fine sandpaper and repaint.

AboutCracks appear in the walls of high-rise buildingsWhat's going on is probably for these reasons, wall cracks are a very troublesome thing, which seriously affects the beauty of the home, and there are some blockages in this residence, so it should be dealt with in time.

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Cracks in the wall are a common problem, and the general treatment methods are as follows:

1.Treatment of small cracks: If the cracks are small, they can be closed with a seam sealer. First of all, the cracks of the talking beam are cleaned, and then filled with a sealer, then scraped with a scraper, and then sanded with sandpaper after drying.

2.Treatment of large cracks: If the cracks are large, you need to hit them with a small hammer first to prevent the bricks from loosening, and then use a cleaning brush to remove the dust from the cracks. Then fill it with caulk, scrape the caulk flat, and then sand it carefully with sandpaper.

3.Strengthen the wall support: If the crack is caused by the deformation of the wall, the wall support needs to be strengthened. Methods include piling, drilling and reinforcement, wall reinforcement, etc., which need to be handled by professionals.