The main reasons for the collapse of the ceiling are as follows:
1, "Crossing the nails." There are many ways to fix the boom and the floor. Among them, the raft is used to hit the slab (concrete slab), and the raft is nailed into the sky with iron nails or screws; some use the steam nail to fix the wooden material to the sky. Fix the boom; or use the nail to penetrate the concrete floor to fix the upper hanging point of the boom; or fix the main keel or wooden boom with the nails of the sky nail. This is all about the category of the sky.
2, "support the top". The flat top does not need to be suspended by a boom. Instead, the keel of the flat top is directly fixed to the side wall or the side of the beam with a needle to fix the flat top.
3. The boom is overloaded. The boom with the flat top is sparse or too thin, and the flat top weight exceeds the force that the boom can withstand.
4. The wooden boom is split or the steam needle is too short and too little.
There are two main problems with the paint ceiling:
1. The bottom of the building slab is not flat, the screed layer is too thick, or the bottom of the board is cleaned with impurities.
2, the cast-in-place concrete floor slab installation sloppy, uneven, or use waste engine oil as a release agent, with linoleum or fiberboard or even use paper to fill the template seam, not cleaned before painting.
In the above two cases, the adhesion between the stucco layer and the floor slab is poor, and the hollow drum or even the crack is generated. The decoration is not removed during the decoration, and the leveling paint is directly embedded, and the vibration of the machine such as the impact drill in the decoration construction is promoted. The flat top collapsed after a certain period of time.
Solution: Therefore, when decorating the flat top, the original brush layer must be inspected one by one, and the empty drum and cracked paint layer can be removed and redone. When using a highly vibrating machine, special care should be taken not to vibrate the floor before the repair layer is firmly bonded. At present, the relevant departments are considering the elimination of prefabricated slabs in residential houses, the use of cast-in-place concrete slabs, and the requirement that the bottom of the slabs be flattened to eliminate flat-topping and the use of batch-embedded leveling, which is an effective measure to avoid flat-topping paint collapse.
Attention to the problem: When the home decoration is painted flat, pay attention to check whether the paint layer is firmly bonded, not hollow, and not cracked. It can be inspected by observation and tapping.
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