1. This kind of concrete floor slab has strong impermeability. Take a closer look at whether the water leakage point is at the junction of water pipes, PVC pipes and floors. Generally, this place is weak. If so, please hire a bricklayer with good craftsmanship.

2. The causes of large-area water seepage in concrete roofs and floors:

Is the roof slab casting continuous? If not, it may be caused by untimely storage. One part is initially set, and then the next part is poured. It is also possible that the external temperature is low after the plate thickness is large, the internal hydration heat is high, and the temperature stress causes concrete cracks. If there are too many steel bars, it may also cause the vibrator to be unable to be inserted inside to vibrate, resulting in honeycomb structure and water seepage in the board. Many designs adhere to the principle of using more steel bars and less brains, and add steel bars on the basis of design. It stands to reason that increasing steel bars and thickening concrete will not lead to water seepage. When it rains, the air humidity is high, and when it doesn't rain, there is no water drop on the floor.

3, the possibility of temperature is high, if you want to cover the soil, there will be no problem in treating the concrete slab, but you can't solve it without covering the soil! When pouring the floor slab, if the wind is strong and the weather is hot (26~30 degrees), the plastic shrinkage cracks will be irregular or parallel and perpendicular to the steel bar.