Why do ceiling ceilings crack? What are the prevention and treatment methods?

Suspended ceiling is a common decoration method of the ceiling ceiling in the room, although the ceiling has a good decorative effect, but many community owners are still complaining that the ceiling of the ceiling has been applied for a long time before the cracking, in fact, if you want to repair the crack of the ceiling.

The first to find the cause of indoor ceiling cracking, it is better to take preventive measures to solve it in the interior decoration link, today let's understand the reasons for indoor ceiling cracking and how to prevent ceiling cracking and other related knowledge in detail, looking forward to some assistance to you. What are the causes of cracking in indoor suspended ceilings?

There are generally several factors for the cracking of indoor ceilings, such as the ceiling is very large, the house has a foundation settlement, the raw materials of the ceiling will be deformed when the gas is gased, and the temperature difference between the air conditioning in the house will also cause gaps

1. Cracking on the surface of the car paint: if it is only a strip, multi-legged worm or uncertain crack on the ceiling paint layer, the problem is not big, and this situation may be caused by the first time, the brush is too thick or not physically labored, the substrate is too loose or not smooth, and the topcoat and paint are not matched.

Repair plan: Removal of the affected paint layer; The paint layer should not be too thick for a project construction; Ensure that the front layer of paint is dry before hand coating; When necessary, it is necessary to seal the substrate with a suitable topcoat; For substrates with a larger surface roughness, apply products with good flexibility; When the ambient temperature of the substrate is less than 5, the wall paint cannot be constructed; Topcoats and paints should be ancillary.

2. Caused by temperature changes: cracking caused by temperature changes is generally not a big problem, only harms the surface, and is not easy to involve the safety factor of the ceiling lamp. Patch Plan Scenario:

The gap is not large, and it is recommended to paste a layer of kraft paper bag and then brush the veneer architectural paint; If the gap is too large, it is best to cut out a piece of gypsum board first, polish and polish it to a suitable appearance, make up for the gap, and then brush the decorative board architectural coating.

3. Unreasonable engineering construction leads to cracking: first check the main keel, after dealing with the quality of the underlying products, and then do the inspection of the finishing material level, if the ceiling lamp is more seriously deformed and damaged, the total area of dismantling can be expanded, and the main keel can be leveled and then repaired in accordance with the normal construction steps.

The above is a brief introduction to the causes of indoor ceiling cracking, I believe that according to the above detailed introduction, everyone will let the ceiling crack have a further grasp and understanding, once the natural ceiling cracks, it will not only affect the safety of the settlement, but also continue to destroy the family's home decoration effect.

It may be caused by long-term ventilation, do not ventilate frequently, you can re-eradicate and re-decorate.

It may be caused by the weight of the suspended ceiling. Such a thing should be thought of when making the ceiling, so when making the ceiling, we must strengthen the quality, strengthen the protection of the wall, pay attention to the cost, and pay attention to the maintenance of the wall.

Nowadays, many people spend a lot of effort on the ceiling and ceiling decoration of their home in order to pursue beauty and style. What are the causes of cracks in the ceiling? Let's take a look.

Ceilings are prone to cracks, and many renovated homeowners should have this problem. Here's why:

First, the construction materials are not up to standard (the quality of the ceiling material leads to cracking).

If the quality of the skeleton material does not meet the requirements, it will directly affect the firmness of the entire skeleton, which is an important cause of cracking and deformation of the ceiling. For example, the stiffness and straightness of the keel and boom are not enough, and internal stress will be generated, and the gypsum board will inevitably deform and crack in the process of releasing the internal stress.

There are many materials used in the construction of the ceiling, and if the material is hidden and the problem appears, the ceiling will naturally be more prone to problems. The ceiling materials listed in the table above can cause cracking in the ceiling.

Second, the installation and construction are not standardized.

When the keel and gypsum board of the ceiling are not properly installed, stress will be generated, and the stress generated will be slowly released after the completion of the ceiling project, and when the stress is greater than the fastening force, it is easy to cause cracks in the joints of the gypsum board.

1. The installation of the boom is not standardized.

When installing the boom, the bolt is not properly set off to fix the boom; When the keel is installed in the stove, when it is found that the position of the boom is not appropriate, instead of reinstalling the boom, the boom is bent and treated, so that the keel has stress, which buries the hidden danger of cracking the ceiling in the future.

2. Improper fixing of gypsum board.

When installing gypsum board, if there is no installation specification to screw from the middle to the four sides, but from the four sides of the screw at the same time, then the gypsum board will also produce stress, if the stress is large enough, it will also cause cracking.

The ceiling has high requirements for technology, and it is also a place where cracks are easy to appear, so some owners find that there are large and small cracks in the ceiling after moving in, and they don't know what causes it. So, what are the causes of ceiling cracking? What should I do if I find a crack?

Let's take a brief look at it together.

First, the reason for the cracking of the ceiling.

1. Due to the quality problems of the ceiling material, it is one of the reasons for the cracking of the ceiling, such as the skeleton material is not strong enough, and it is easy to crack and deform when it is subjected to external force; 2. Due to non-standard construction, it will also lead to cracking of the ceiling, such as the installation of the keel and gypsum board is not standardized, and over time, the connection of gypsum board is prone to cracks.

Second, the ceiling crack treatment method.

1. When there is a small crack in the ceiling, you need to check the cause of the crack first, if the impact is not large, you can use some gold foil paper to decorate, but most of the decorations are not very suitable, and the cost is very high, so this method is not particularly recommended.

2. If it is because of the cracking caused by the poor quality of the ceiling material, it is necessary to formulate a treatment method according to the cracking situation, if the situation is light, you can use putty to fill the cracks, and then paste the anti-crack tape, and finally paint it, but if the situation is very serious, it may be necessary to remove the ceiling and reinstall it, and the project is larger.

3. Cracks in the ceiling are not necessarily the cause of the ceiling, but also may be cracks in the floor slab, and the owner needs to reflect to the property in time and ask the property to find the reason to see if it is because the object is too heavy, or the problem of the house structure, which is rare, but as long as it appears, the situation is more serious.

4. If it is caused by non-standard construction, it is necessary to remove the batch ash layer on the surface of the wall, then clean it up, and finally carry out the work of batch ash in order, because some houses may be relatively old, so the new and old cement joints are easy to leave traces, and it is recommended to scrape a layer of putty or latex paint on the surface.

In our lives, there will be a situation that many people will encounter, some people live in it, and after a long time, they will find that the walls and ceilings of the home will crack, etc., which is also a common quality problem after many people decorate. "On the one hand, it affects the beauty of the house, and if it is serious, it may aggravate the problem of the wallWhat to do if the ceiling and wall are cracked？It is necessary to do a good job in the details of the decoration and take preventive steps.

What to do if the ceiling and wall are crackedA professional approach is required. Cracks at the bottom of wall joints can cause cracks to appear on the surface of the wall.

The cracks mainly occur at the joints between the reinforced concrete shear wall and the ceramsite bricks, the joints between the reinforced concrete beams and the ceramsite bricks, the crash doors, and the joints between the gypsum board partition wall and the original wall. The occurrence of cracks is mainly due to the influence of the surrounding environment or external forces, and the positions of gypsum boards, prefabricated partition panels and prefabricated floor slabs will shrink and change, resulting in joint cracking. Solution:

It is recommended that after the deformation of the whole building tends to be stable, it is easy to regenerate in a short period of time. Cracking of the structural layer of the wall itself can also lead to cracking of the surface wall. There are two situations, one is that the original wall itself has cracks, and the other is that the original wall does not crack in the decoration way.

Treatment method: This cracked ordinary decoration method can not be repaired, and it is necessary to find professional building structure personnel according to the actual situation and take corresponding measures.

The most commonly used ceiling is 9mm paper gypsum board, which is widely used due to its lightness, low cost and simple processing. There are many reasons for cracks, such as poor paint quality, improper construction leading to paint cracking, etc. The most common cause is the cold shrinkage and heat rise of the board, which leads to cracking of the coating, which usually occurs at the joints of two plasterboards.

Depending on the position of the keel, the nails on the threads ensure that each screw is fixed to the keel, ensuring that the drywall is evenly loaded, reducing shrinkage and deformation. Anti-rust treatment should be carried out first, the screw spacing should be about 200 mm, and the nail head should be sunk. If the nail tip is too heavy, it will peel off due to squeezing too tightly.

The V-groove treatment at the joint increases the area of the inlay material and reduces the possibility of cracking.

What to do if the ceiling and wall are cracked？It needs to be handled by a professional master and take precautions.

You can get it for free

In modern home decoration, many homes are decorated with ceilings by installing a variety of suspended ceilings. Although the ceiling is beautiful, once it cracks, it will be very ugly, affecting the overall aesthetics of the room, and in serious cases, it will also cause safety problems. Only by knowing the cause of the cracking of the ceiling can it be well avoided.

So what is the crack of the ceiling for Qiyan? What are the reasons? Let's take a look!

Why is the ceiling cracking.

1. Why is the cracking of the ceiling - the gypsum board is not properly fixed.

When installing gypsum board, if you do not follow the specification of screws from the middle to the four sides, but screw from multiple places on the four sides at the same time, then the gypsum board will produce stress, and if the stress is large enough, it will cause the ceiling to crack. In addition, if the spacing of the screws fixing the gypsum board is too large or some of the screws are correctly positioned but not fastened, it will also lead to cracking of the ceiling.

Second, the reason for the cracking of the ceiling - improper scraping of putty.

If the interface between gypsum board and wall, wood plywood and other temperature shrinkage or dry shrinkage of different materials is not properly handled, it is easy to lead to cracking of joint putty. Putty drying too fast, joints too long, putty setting too slowly, putty layer too thick, etc., may be the cause of cracks in the ceiling.

Third, the reason for the cracking of the ceiling - the moisture-proof treatment is not in place.

If the wooden keel is used to protect the lead, and the moisture-proof treatment is not done well, the wood is more susceptible to moisture deformation, which will lead to cracking of the ceiling. In addition, gypsum board is also more susceptible to moisture, when fixing the screws, if the drilling is careless and the board is drilled and cracked, so that the gypsum board is more likely to deform, resulting in cracking of the ceiling.

At present, when home decoration, many families will choose to install suspended ceilings for ceiling decoration, which can make the whole home look beautiful and. However, if the ceiling cracks, it will not only affect the safety of the occupants, but also destroy the overall decoration effect. So, how do you prevent ceiling cracking?

What are the main methods? Let's take a look!

How to prevent cracking of suspended ceilings.

1. How to prevent cracking of the ceiling - the installation of the boom should be standardized.

The spacing of the boom should be controlled within 1200mm, and the spacing between the fixed points between the booms should be equal as far as possible in the construction, and the booms should be as far as possible with the direction of gravity on the axis of the same trouser code.

Second, how to prevent the cracking of the ceiling - the installation of the skeleton of Hu Nalong should be standardized.

The spacing of the main keel of the ceiling must be controlled within 1000mm, and the distance between the boom and the end of the main keel shall not be greater than 300mm, and when it is greater than 300mm, the boom should be increased. The installed skeleton must be in a stress-free state, without false hanging and false hanging, and the overall keel frame should be at a regular level.

3. How to prevent cracking of the ceiling - the installation of gypsum board should be standardized.

The strength performance and deformation of gypsum board are determined by the direction, and the longitudinal performance of the board is superior to the transverse, so the longitudinal part of the gypsum board is not allowed to be parallel to the covered keel when the ceiling is suspended, and it should be perpendicular to the keel, which is an important measure to prevent deformation and cracking of joints.

Fourth, how to prevent the cracking of the ceiling - putty scraping should be standardized.

A gap of 5-8mm should be left between the base plate and the base plate, and the gap and chamfer position are mainly used to fill enough fine seam putty to make the whole base layer integrate. In order to avoid the dry and hard shrinkage of the filled putty and cause dark cracks in the joints, it is required that the construction of the filled putty must be carried out in two times.

Under normal circumstances, if it is only the surface cracking phenomenon of linear, angular or amorphous cracks on the ceiling paint film, it may be caused by too thick brushing or not dry recoating, the substrate is too loose or rough, the primer and the topcoat are not matched, and the temperature change is caused by the fact that the problem is relatively not big, and the serious problem is the crack at the corner joints of the ceiling.

The traditional gypsum board ceiling decoration is mostly made of wooden keel frame and then fixed on the gypsum board, and the L-shaped gypsum panel is usually used to fix the L-shaped gypsum panel at the corner with the greatest force, which is what the owners often call the figure 7 shape. At present, more than 95% of the gypsum board ceiling corner construction is made of L-type, which can avoid cracking, which is also a more respected process, but even if the L-shaped construction is adopted, there will still be cracking, so some people question the scientificity of L-shape.

There is a saying that after cutting the gypsum board into an L-shape, the strength of the board surface is reduced, and it is easier to be torn, just like a piece of ordinary paper, tearing off a corner, pinching the two corners of the torn paper with your hands, and it is easier to tear it apart with a gentle pull. So, what about the force exerted on the drywall?

Because the gypsum board is fixed with a wooden keel, it is affected by thermal expansion and cold contraction, and the wooden frame is easy to form tension to deform and shrink on both sides, which directly leads to the inability of the corner to be forced, and the sinking of the ceiling and the cracking of the gypsum board are caused by the gravity of the ceiling itself.