The majority of gaps in the walls of self-built rural villas on the second floor are due to basic uneven foundation settlement. In fact, this situation may occur more often in self-built villas in rural areas. This is because we do not pay attention to the foundation or fail to adopt the actual design plan at all, resulting in uneven foundation settlement and gaps. Often there are no gaps in other aspects. This is because the basic uneven foundation settlement has only achieved a certain degree and has not caused very obvious harm. In other words, it is only a temporary harm and may cause more significant differences in the future. gap.
The structural method is unscientific. For example, when building vertical walls, the wall beams are not constructed simultaneously, and no slanting beams are left. If straight beams are used, vertical gaps often occur at the junctions of the horizontal and vertical walls. Similar longitudinal gaps will also occur if the fine stone transfer pump is not set according to the standard, or if the steel bars connecting the structural columns and the wall are not set scientifically. The construction rhythm is unscientific. According to the standard, the wall is built one step at a time every day. The wall on the first floor should not exceed three meters high. It is more effective to build the wall in two days. And the wall should be embedded with inclined guide pillars in the interior space. After the wall surface shrinks and the foundation settles and deforms to a certain extent, the diagonal construction can be carried out. In this way, the horizontal cracks in the wall will be much smaller in the future.
If the area of ??the second floor is larger than that of the first floor, this may happen. The overall load will be uneven and cracks will occur. Some are cracks at the top corners and some are cracks on one side. Yes, as long as the flat roof is not cracked or leaking, it is no big deal. Remember that when building a house in the future, the top floor concrete must be poured thicker, generally not less than 13 to 15cm. A sufficient thickness will have enough weight to prevent cracking when the pressure increases, whether on the wall or on the surface. Generally speaking, the eight-shaped gap that appears on the first floor wall is mostly due to the foundation settlement.
If it is a second floor, the diagonal gap outside the wall footing is caused by the ambient temperature cracking. The poured concrete flat roof structure has been completed. The upper slope roof or insulation layer has not been built for a long time. The structure will deform due to thermal expansion and cracking of the wall due to the ambient temperature. When the entire wall is long, the wall must be built first when building the house. The post-poured concrete structure is used to build a house when the temperature is low. When the weather is hot, the wall will expand due to heat, but due to the constraints of the concrete structure, gaps will also occur.