What is the reason for the cracking on all sides of the bottom of the ceiling

Causes of ceiling cracking - cracking on the surface of the paint If it is only a linear, angular or amorphous crack on the ceiling paint film, it is not a big problem. This phenomenon may be caused by the first time, such as too thick or not dry and heavy, too loose or rough base, and mismatch between primer and topcoat.

Remediation solution: remove the affected paint film; The paint film should not be too thick at one time; Make sure the front coat is dry before reapplying; Seal the substrate with a suitable primer if necessary; For substrates with high roughness, use products with good flexibility; When the substrate temperature is lower than 5, the latex paint cannot be constructed; The primer and topcoat should be matched.

Causes of Ceiling Cracking - Cracking Caused by Temperature Change Because of the cracking caused by temperature change, the general problem is not big, it only affects the surface, and will not involve the safety of the chandelier.

Repair plan: the gap is not large, it is recommended to paste a layer of kraft paper and then brush the finishing coating; If the gap is too large, it is best to cut out a piece of drywall first, polish it into a suitable shape, fill in the gap, and then brush the finishing paint.

Reasons for cracking of the ceiling - cracking caused by improper construction, etc. Check the keel first, and then check the finishing materials after dealing with the quality of the base layer. If the chandelier is seriously deformed and damaged, the demolition area can be expanded, and the keel can be repaired according to the normal construction steps after leveling.

New house decoration, do a good job of these process details, the ceiling is no longer afraid of cracking!

The reason for the cracks in the ceiling may be the reason for the shrinkage of the putty, or it may be that the keel made of wood is too heavy and there are loose parts, or it may be that the density of the boom is not enough to collapse, and the keel sinking and the adjacent keel have a slight dislocation.

1. Caused by temperature changes.

Paste a layer of seam paper on the top, the seam paper is painted with white latex, and then the putty is applied and then the top coat is brushed, if the gap in that piece is too large, then the crack is filled with plaster, and then the white latex is coated with the seam paper and then pasted, and then the putty is brushed and painted.

Second, there is a problem with the keel.

First fix the keel, add the suspension bar, and then buy the mesh cloth or grid belt, the general paint shop has to buy, directly scrape the putty on the original bottom, paste the mesh cloth, and then scrape, scrape the smooth and then paint, repair with the original is the same.

3. Cracking caused by improper construction.

If you encounter this situation, you must first check the keel of the ceiling to see if it is a quality problem of the base layer, and then check the appearance of the problem. If this is the case, the ceiling is seriously deformed or damaged, it may be removed first, and then the keel is leveled before the next step, the general family does not open the window after the latex paint, because the latex paint is affected by humidity and temperature, and the temperature difference between indoor and outdoor is easy to lead to latex paint cracks.

Fourth, the substrate is too rough.

In this case, the film should be removed and a new primer should be reapplied, always making sure that the primer is completely dry before applying it again, and not if the temperature is below 5 degrees Celsius.

Fifth, the problem of paint layer.

It is also the most common situation in home improvement, and the visible surface of the ceiling has a linear curved stripe. In this case, the main reason is that the surface is too heavy, at this time, you need to remove the previous paint film, and then apply a new layer of paint film, and brush the surface with paint after application.

1. The ceiling at home is generally a gypsum board ceiling. Some use wooden keel, some use light steel keel, for stability and durability considerations, it is generally better to choose light steel keel ceiling.

Second, it is not advisable to replace the keel by yourself, and after finding the problem, of course, you should contact the previous decoration company, let them replace the new one and be responsible for it.

There are many reasons for the cracking of suspended ceilings, such as carpentry

1. The ceiling keel is made of wood.

The keel is still a light steel keel, and the wooden keel is more prone to deformation, or the stress is uneven during construction. Cracking is more likely to occur in the later stages.

2. Process problems: whether the whole corner of the gypsum board is used for sealing the gypsum board, rather than splicing (the cost has a certain relationship).

3. Painter: whether there is a strengthened anti-crack treatment to prevent it, and whether there is a caulking paper tape to strengthen the anti-cracking.

4. In the later stage of ventilation, large windows should not be opened for large-intensity ventilation, and the soft breeze effect of small windows is better, which can better avoid such problems.

Suggestion: Do a good job of carpentry foundation, smooth base and uniform stress, woodworking board priming, double-layer gypsum board cover (the cost will increase a lot), which can effectively prevent such problems.

Remedy: The cracking of the ceiling coating is more difficult to deal with after it is done, and it will leave obvious repair marks. It can be handled in the following way:

If it is only a slight crack, cut the V-shaped gap at the crack and clean it, and then use gypsum putty to fill the compact, sand, and paint. If the crack is large and obvious, it is necessary to shovel off about 10 minutes on both sides of the crack until the plasterboard is exposed and cleaned, re-mend the joint, apply the caulking tape, scrape putty, and paint.

1.The surface treatment is not in place.

After making gypsum board, you also need putty and other coatings. Putty leveling can't just be done once. It is best to do it in two phases so that the surface layer is stronger and there will be no dark cracks.

In addition, it should be noted that the gap should be wrapped with kraft paper before leveling when doing surface treatment, so that it is not only convenient to construct but also not easy to crack after brushing latex paint.

2.Caution should be taken in the selection of construction materials.

Most of the decoration is made of light steel for the ceiling, but for curved and special-shaped hanging sheds, wooden keels are sometimes used. For the keel in the selection of materials to pay attention to, wood materials are easy to be damp deformation, when purchasing, we have to look at the moisture content of the wood, try to choose materials with small moisture content, and pay attention to the moisture-proof treatment in advance, otherwise it is easy to lead to cracking and deformation of the ceiling.

Gypsum board has ordinary type, waterproof type, fireproof type, high strength and other types, in the ceiling design, according to different use requirements, different regions and construction seasons to choose. Although the thickness of some plates reaches the standard, the density is very low, the pores are large, and there are more impurities, so the board is easy to crack in the future, so don't be greedy for money in order to save money.

3.The whole board was not used in the corner.

Use two boards to make the corners of the ceiling, generally speaking, the most prone to cracking of the ceiling is the corner. In the future, the joints of the board will crack, and we must urge the master to make the whole gypsum board at the corner to prevent the problem of cracking at the corner.

4.There were no gaps left during construction.

The principle of thermal expansion and cold contraction of materials, due to the temperature factor, there is no room for expansion and contraction between the boards, and the situation of extrusion will be formed, resulting in cracking. The space of the gap should be sufficient, so that when the putty is applied in the future, the gap will not be filled, and it will crack from this gap in the future.

Here's how to deal with it:

Analyze the causes of cracks: Analyze how cracks are generated, find out the problem of pipe fittings, and then formulate a plan, do not blindly construct.

Repair of cracks on the surface of the paint: remove the affected paint film; Ensure that the paint film is not too thick at one time; Make sure the front coat is dry before reapplying; Seal the substrate with a suitable primer if necessary; For substrates with high roughness, it is recommended to use products with good flexibility; When the substrate temperature is lower than 5, the latex paint cannot be constructed; The primer and topcoat should be matched.

Cracks in the ceiling caused by temperature changes: the gap is not large: if the surface gap is not large, then it is recommended to paste a layer of kraft paper on the gap and then brush the finishing paint.

Wide gaps: If the surface gaps are wide, then it is best to cut out a piece of drywall first, polish it into a suitable shape, fill in the gap, and then apply the finishing paint.

4.Ceiling cracking caused by improper construction: when repairing, you should start from checking the keel, and after dealing with the quality of the base layer, the next step is not to use putty to repair the joints, but should open several plate joints on the plate surface near the keel near the original seam and repair them at the same time.

If the original ceiling surface has been deformed, swollen and damaged, the demolition area should be appropriately expanded, the keel should be leveled and replaced with a new plate, paved in blocks according to the size of the area, and the post-repair work of the working surface should be completed according to the normal construction steps.

Because the area is too large, there is settlement in the house, the ceiling material will be deformed in the air, and if the room is air-conditioned, the temperature difference will also cause cracks. In recent years, we have done construction, and the top surface is reserved for expansion joints along the corner of the wall, so that the top surface is not directly fixed on the wall, and there is space for expansion and contraction. If it's cracked.

Shovel off the putty, knock down the plasterboard v, embed it with plaster, put a bandage on it, and then batch the putty to make paint.

Is it a plaster roof that is hanging? If there are many cracks, you can go to a place that sells building materials and buy anti-crack nets or paper tape. After shoveling off the original putty and gluing the anti-crack net with glue, it has dried. Do putty and paint on it.

Because the ceiling you choose is very poor, now the integrated ceiling to choose the brand, a good ceiling will not sag, the quality ceiling is a 30-year warranty, my friend has been at home for 12 years, and now it is fine, I suggest you still change the brand of ceiling.

Abnormal. Because the ceiling cracking of the new house is likely to be caused by poor construction materials or non-standard installation. However, when encountering this situation, first analyze the cause of the crack, and then ask the developer to give a solution, and be careful not to blindly carry out the construction.

If there are only linear or amorphous cracks on the paint film of the ceiling, it means that there is no big problem. The reason for this is usually that the paint is too thick when applied for the first time, or reapplied without drying the first time, and it may also be caused by the substrate itself being too loose and rough, and the primer and topcoat are not matched.

Reasons for cracking of the ceiling: non-standard scraping putty, improper fixing of gypsum board, and improper moisture-proofing.

1. Scraping putty is not standardized, when the interface between gypsum board and wall, wood plywood and other interfaces is not properly handled, it will lead to cracking of joint putty.

2. The gypsum board is improperly fixed, and the general correct installation method of the gypsum board is to screw from the middle to the four sides. The screws from multiple places on the four sides at the same time will cause stress on the gypsum board, and if the stress is large enough, it will cause cracking. In addition, if the plasterboard is installed correctly, it will also cause cracking if it is not fastened.

3. Improper moisture-proof, if the wooden keel is used, the moisture-proof is not properly handled, which will lead to the deformation of the wood by moisture, which will also lead to cracking of the ceiling.

Ceiling cracking treatment method

1. If it is a crack caused by improper construction, then the entire construction position should be checked first when repairing. Then, on the plate surface of the keel near the original joint, several plate joints are opened and repaired at the same time, so as to eliminate the deformation under the action of internal stress.

2. If there are linear, angular or amorphous cracks on the paint film, then the problem is not very serious. The treatment method is to first remove the damaged ones, and then start to paint the film from the paint, taking care not to apply too thick at a time. Then seal the substrate with a primer.

3. If the cracking is caused by temperature changes, it generally appears on the surface, as long as the surface is treated. The method is as follows: if the gap on the surface is not large, you can paste a layer of kraft paper on the gap, and then brush the finishing paint.

If the surface gap is wide, then it is best to cut out a piece of drywall, polish it into a suitable shape, fill in the gap, and then apply the finishing paint.

There may be several reasons for the cracking of the ceiling:1Poor construction quality:

If the construction quality of the ceiling is not good, such as the use of inferior materials, the construction is not standardized, etc., it is easy to lead to the cracking of the ceiling. 2.Temperature Variation:

If the indoor temperature changes greatly, such as turning on the heating too high in the winter or the air conditioner too low in the summer, it will cause the ceiling material to expand and contract, which can cause cracking. 3.Humidity changes:

If the humidity in the room changes greatly, such as a humid environment or a large amount of water is used, it will cause the ceiling material to expand and contract, which can cause cracking. 4.External force action:

If the ceiling is subjected to external forces, such as heavy impact or man-made damage, it will cause the ceiling to crack. 5.The design is not reasonable:

If the design of the ceiling is not reasonable, such as the ceiling area is too large or the ceiling material is not suitable for use in the environment, it is easy to cause the ceiling to crack.

1. The problem may be in the paint. If you live for a long time, the paint film of the ceiling will crack. This problem is not very big, it may be caused by the paint being brushed or the bottom being too loose or rough.

Xi Songheng 2, it may be that there is a problem with the quality of gypsum board. Although gypsum board is not much to do, the quality varies greatly. If the quality of the cherry blossoms we bought at that time was not very good, it would also cause the ceiling to crack.

3. Improper construction may also be due to the wrong method of painting by the workers at that time, or the paint film is too thick, and the stone high plate is not spliced well, which will lead to cracking of the ceiling. 4. It may also be a ceiling crack caused by thermal expansion and contraction. If it is a crack in the roof caused by thermal expansion and contraction, then you don't have to worry, because it will still return to its original state.

Many people in order to be able to decorate the home to disturb the style of repair become a little more high-grade, so when decorating the house, will consider the roof fan Pei Dan into a variety of shapes, when the house decoration is over, the overall effect is still very good, but the cavity will be found to be cracked in the ceiling for a period of time, what is the reason for the cracking of the ceiling, many people may be more confused.

There are three main causes of ceiling cracking:

Clause. First, the thickness of the latex paint on the surface of the ceiling is relatively thick;

Clause. Second, the temperature difference between indoor and outdoor is relatively large;

Clause. 3. When making the ceiling, the gypsum board is not fixed or the keel design is unreasonable;

Clause. Fourth, the humidity in the home is relatively large.

How to repair cracks in the ceiling?

Before repairing the ceiling, it is necessary to see what causes the crack of the ceiling, and then determine the final repair plan.

The first case: if the cracking is caused by the paint surface being too thick, then the original paint film can be removed again, and then the paint film can be repainted, and the primer can be brushed again after the paint film is dry.

The second case: if the crack is caused by the temperature difference, then you can look at the size of the crack, if the crack is relatively small, then you can paste a layer of kraft paper at the crack, and then paint the ceiling paint.

The third situation: if it is because the gypsum board is not fixed and the cracking is caused, then you need to check whether the deformed area is very large, if the area is relatively large, then you need to remove all the ceilings, and then redo the ceiling.

How to make a suspended ceiling so that it does not crack?

Personally, I think you can choose calcium silicate board and light steel keel to make ceilings, because the stability of calcium silicate board is better, and the hardness is relatively high, there will be no deformation, the frame of the light steel keel is metal galvanized, so there will be no deformation, and the light steel keel also has moisture-proof and fireproof performance.

What are some of the things you need to pay attention to when making a suspended ceiling?

The first point, after the ceiling is hoisted, it is necessary to fill the gaps in the ceiling with elastic caulk, and then hang the net.

The second point is that the junction between the ceiling and the wall must be added with a yin corner strip.

Third, before applying the paint, the nail hole on the ceiling should be treated with anti-rust.