Will the gypsum board ceiling crack after repair

To be precise, it will definitely be a matter of time, maybe a few years, maybe ten years, just like you will still be hungry if you eat something hungry!

Because of the wood square, the expansion and contraction rate of gypsum board is not the same, especially in the case of the wood side is not dry, there is no anti-crack treasure at the joints, and the bandage is not glued well, which is the cause of cracking, the remedy is not to worry about it now, and then find someone to repair it next autumn after the heating is stopped, and it will not crack in the future, in fact, the first year of decoration will be more or less cracked, don't worry There are many reasons for your reference

The main cause of cracking.

1 Characteristics of the volume stability of gypsum board Because gypsum is used in industry to heat gypsum dihydrate and discharge crystal water. Gypsum board is processed and shaped, and water is added to the burned and ground semi-hydrated gypsum, which again forms the important characteristics of the dihydrate gypsum structure. It separates the felt crystals from the gypsum slurry, and during the drying process, micropores are formed, which gives the gypsum a "breathing" property, that is, when the air humidity changes, it can absorb moisture and quickly re-emit it.

The linear expansion and contraction of gypsum board in the air-dry state is negligible, even if the air humidity reaches 90, in the case of 24 hours, the maximum expansion rate of gypsum board is only lateral, therefore, this small expansion and contraction amount is not the main reason for causing board surface deformation and joint cracking.

2 The influence of the strength of gypsum board The structure of gypsum board is a board that is firmly bonded together with gypsum core and face protection paper, and the face protection paper plays a role in bearing tension and reinforcement, and the face protection paper layer has a great impact on the quality of the board, and the board that is not firmly pasted on the paper surface can not be used. The strength and elasticity of the longitudinal and horizontal bidirectional fibers of the face paper are different, the longitudinal is larger than the transverse, and the longitudinal bending and deformation resistance is also stronger. Gypsum board has strong resistance to moisture, and the paper surface layer can prolong the time for the board to absorb water, but it does not prevent water absorption.

During installation and construction, the strength of gypsum board will be reduced for a longer period of time or continuous moisture soaking. Therefore, wet panels must not be constructed and installed. High temperature has a certain effect on the strength of gypsum board.

When the ambient temperature of the gypsum reaches 42°, the solidified gypsum will begin to change the crystalline structure, so that the strength is damaged, so the gypsum board cannot be directly connected to the heater, etc.

3 The design and construction of light steel keel skeleton structure affects the reasonable design of the keel, the use of qualified materials and parts, and the strict control of construction quality, which is an important guarantee to ensure that the QST system ceiling is not deformed and cracked. Mistakes and negligence in any of these links can lead to deformation and cracking.

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; In addition, if the screws that hold the drywall in place are too spaced too far apart or if some of the screws are in the correct position, they can also cause cracking.

When the ceiling foundation work is completed, there may be other types of work. If the connection work is not coordinated, chaotic operation, mutual interference, and barbaric construction of the subsequent process, it is easier to cause cracking of the ceiling. For example, when opening the lamp hole, there is no protection measure, which causes the ceiling to vibrate, resulting in cracks.

In addition, when the hidden pipelines and equipment inside the ceiling are repaired during daily maintenance after occupancy, if there is no standardized operation, it is easy to cause the keel to deform or the finish to be damaged, which makes the ceiling crack.

At present, the gypsum board on the market has ordinary type, waterproof type, fireproof type, high strength and so on, in the ceiling design, according to different use requirements, different regions and construction seasons to choose. Now the quality of gypsum board in the decoration market is uneven, and the use of gypsum board with good quality produced by large manufacturers should be selected, with high strength, good toughness, uniform foaming, full edge molding, and solving the problem of cracks from the material.

In addition, there are generally two varieties of gypsum board with a thickness of 9mm and a thickness of 12mm on the market. Many people like to use 9mm thick ordinary gypsum board to make ceilings, but because the thickness of 9mm ordinary gypsum board is relatively thin, the strength is not high, and it is easy to deform under rainy and humid conditions, it is recommended that it is best to use gypsum board above 12mm. At the same time, the use of thicker plates is also an effective means of preventing joint cracking.

Gypsum board ceiling is not easy to maintain after the cracking phenomenon is done, the key is to pay attention to the structure of the construction is firm, and the outside paint construction should also pay attention to the construction points.

As long as the construction steps are correct and the quality of the materials is passable, there is no problem.

Follow these steps to achieve good results:

1. There are gaps in the gypsum board (board) to be caulked. It is recommended to use a caulk with Texboard Worry-Free Toughness Caulk (TB on) for caulking, which has toughness and can reduce cracking. Allow to dry before attaching the seam tape.

2. Scrape putty powder directly on gypsum board (board) is easy to fall off, and it is recommended to use home Texer board worry-free putty batch scraping for priming (TB), and then scrape putty powder (2-3 times) after drying. If you want to apply latex paint, proceed to the following process. <>

3. After the surface of the putty layer is polished, apply latex paint.