If it is not done well, the long-term rain immersion of the wall makes the brick wall weathering seriously and the bearing capacity decreases. If it is added,
Layer, it is easy to appear quality problems, the house on the fourth floor can be reused, the roof should be waterproof, plus
Pouring 10 cm concrete for waterproofing does not make much sense. Buy some waterproofing materials and take precautions on the roof.
Water, and then pour 10 cm waterproof protective layer. It is suggested to reinforce the fourth floor. I used to be a professional.
If the building structure is reinforced, the fourth floor can be used after treatment.
Give you an analysis of the causes of the cracks: you can compare them:: What can you add QQ 49368 1424? I hope it can help you.
There are many reasons for cracks, which can be divided into structural cracks, wall cracks caused by temperature changes and external cracks.
Cracks in wall insulation layer, corner cracks in cast-in-place floor slab, and cracks in wall at structural beam. Some cracks as long as taken
Simple treatment is enough, but some cracks need to be detected by relevant departments and reinforced by appropriate technical means.
Handle. If there is really no repair value, it should be demolished as soon as possible. Unnecessary losses can be avoided.
Structural cracks are generally divided into two types, one is wall cracks caused by uneven settlement of foundation, and the other is.
Wall cracks caused by structural design errors or quality problems in wall masonry construction.
Generally speaking, there are the following types:
1. Cracks in the external wall of the building: ① Oblique cracks appear in the wall, and the cracks are sunken. ② It is more obvious in the lower part of the building, developing from bottom to top, showing a figure of eight, an inverted figure of eight, and joints horizontally and vertically.
2. Cracks in the load-bearing wall: ① Cracks run through the whole wall and pass through the back, which is inclined. ② Directional and regular cracks appear in the walls of different floors at the same position.
3. Floor cracks (floor and roof): ① penetrating cracks (cracks parallel to the beam). According to the relevant acceptance specifications, cracks are allowed in the range of (0.3mm), but cracks have a negative impact on the durability of the structure. ② Stress crack: This kind of crack appears as a 45-degree corner crack or a crack perpendicular to the beam. Cracks are often wrong, and the shape is wide outside and narrow inside.
4. The wall (window wall) at the bottom of the structural beam causes local vertical cracks.
5. Cracks in cantilever structural plates such as balconies and awnings: This kind of crack usually runs through. Everyone should know that if cracks appear in the suspended structural plates such as balconies, the consequences will be very serious.
The above are serious cracks, but such cracks are rare. The most common house cracks are temperature cracks. This kind of crack only affects the indoor beauty of the house and does not affect the safety of the house. Some remedial measures can be taken appropriately: sticking non-woven fabrics at the cracks, installing steel mesh or plugging the cracks with mortar, and then painting to repair them.
In recent years, the application of external wall thermal insulation materials is more and more extensive, and cracks occur from time to time, which not only fails to meet the requirements of energy saving, but also causes the tiles of external walls to fall off, affecting the appearance of buildings and even endangering people's lives.
(Ye QQ 49368 1424)