What is the problem of cast in place concrete cracking in the living room

Cracks can be divided into stressed cracks and non-stressed cracks.

1. The stress crack is caused by factors such as uneven settlement of the foundation, concrete strength, and plate thickness;

2. Non-stressed cracks are caused by factors such as temperature, concrete shrinkage, construction, etc., and the time of its appearance is early and late, and the early dry shrinkage cracks will appear in about 2 or 4 hours after the completion of pouring, and some temperature cracks will appear within three months to half a year after the completion and acceptance. Among them, the main construction factors are the large protective layer of the negative reinforcement of the slab (serious collapse of the steel bar), the insufficient protective layer of the concrete at the bottom of the slab or the excessive chloride salt content of the sand.

If it is a stress crack, there should be more than this, you can follow this direction and then look at whether there are cracks in the same or similar position on your upper and lower floors, if not, you can basically judge that the non-stress cracks caused by the construction quality.

I don't know if the location you are referring to is the wall or the top, whether the house is a new house or a second-hand house, I hope to describe it specifically, there are many kinds of concrete cracks, I hope it can help you.