How can the cast in place roof of a self built house in a rural area still leak if it is cast in sit

Many people have just changed from the tiled houses of the past to the presentReinforced concreteWhen cast-in-place buildings, they will think that cast-in-place concrete must be better than tiled houses, and water leakage is basically an impossible problem. Unfortunately, this is not the case, and cast-in-place roofs made of reinforced concrete are more likely to leak than tiled roofs. Isn't a reinforced concrete cast-in-place roof as good as a tile roof?

The reinforced concrete cast-in-situ roof of rural self-built houses itself has a certain waterproof function. Speaking of carrying leakage waterproof concrete, everyone must know that this kind of concrete is generally suitable for reservoir dams or other components with special waterproof requirements, of course, the waterproof function of this concrete is also very good. But in fact, the ordinary concrete used in rural self-built houses also has a certain waterproof function, and as long as there is no problem with the concrete quality and construction technology, the cast-in-place concrete roof will not leak in a short time, so the reinforced concrete cast-in-place roof is not without waterproof function.

There are several reasons why the reinforced concrete cast-in-situ roofs of rural self-built houses are prone to water leakage. Although the reinforced concrete cast-in-place roof has a certain waterproof function, why is the cast-in-place roof so prone to water leakage? This comes from three main sources:

The first is because of the quality of the concrete itself, such as the cement is not up to standard, and the stone is graded.

Not enough, too much sand and so on. The second reason is the construction process, the vibration work is not in place, resulting in the concrete is not dense enough to appear honeycomb, or the maintenance is not timely or even not in place, etc. The third reason is that the unreasonable reinforcement of rural self-built houses leads to cracking, which is a common problem in rural self-built houses.

In general, the current reinforced concrete cast-in-place roofs of rural self-built houses are not waterproof, but because of various man-made reasons that cause concrete defects and water leakage. Some of the reasons for this can be avoided, but some are difficult to avoid, so the cast-in-place concrete roof still needs to be waterproofed again when decorating, only in this way can we ensure that the roof will not leak.

I think it is very likely that there is a problem with the formwork or that your later maintenance is problematic, and there may be a problem with the ratio of materials.

It may be due to the fact that there is a certain problem with the quality of this reinforced concrete, so there will also be water leakage.

If you had to say what people fear most about cast-in-place roofs, 10 out of 10 people would say they are afraid of rain leakage. Why? Because the cast-in-situ roof is not like a tiled house, the leakage of the tiled house is easy to repair, find the place of the rain leakage, and directly repair the leakage can cure the leakage.

This is not the case with cast-in-place roofing. The floor slabs made in the countryside are generally only 10 15 centimeters thick, and most of the concrete poured is mixed at home, transported to the roof by creepers, and transported to the position to be poured by hand. Then manually lift, vibrate, level, wipe the surface and so on.

Seven or eight processes can complete the process of cast-in-place slab.

The waterproofing function of this concrete is also very good. But in fact, the ordinary concrete used in rural self-built houses also has a certain waterproof function, and as long as there is no problem with the concrete quality and construction technology, the cast-in-place concrete roof will not leak in a short time, so the reinforced concrete cast-in-place roof is not without waterproof function. It must be carried out in strict accordance with the scientific method, and we must not be careless about this.

Once the water seepage is a lifelong headache, the situation of water leakage can only occur through the method of supplementary education, such as to re-pour in situ is not cost-effective, in situ leakage and steel bar is definitely no problem, large cracks are definitely impossible.

The roof of the self-built house is poured in the form of reinforced concrete, and the most critical step is to support the formwork. And this kind of work can not be done by anyone, and the salary of this type of work is also the highest. The effect of the formwork is directly related to the problem of the entire cement pouring surface, and many water leakage problems are also caused by the unreasonable installation of the formwork.

Sometimes, because the formwork is not firmly installed, when the cement is poured on the entire roof, vibrating rods and the like are generally used to make the cement more uniform. Cement quality problems, in order to reduce the cost of the choice of low-grade cement, the size of the pebbles is uneven, the river sand is not screened, the mud content is too high, the concrete mixing is uneven, the construction process is not good, the foundation settlement is not the same to cause cracking, the surface is not waterproofed, are all factors that cause water leakage.

It may be that the process is not enough, there are some cracks in the wall, there is a lot of water, and it will seep in from the cracks in the future, it is very likely that the material is not tight enough, and after a long time of water accumulation, the water will slowly penetrate, and after a long time, water droplets will be formed in the future, which will remain in the house.

This may be due to cracks in the concrete on the roof due to deformation of the foundation, so that the concrete roof can leak.

Generally, the concrete of the roof is non-impermeable concrete, which has no impermeability properties, and there is a high probability of water leakage in the concrete itself.

2.The roof concrete is exposed to the natural environment for a long time, and the surface will inevitably have irregular shrinkage cracks due to wind and sun, thermal expansion and cold contraction

The grade is too low and there is no cement.

First of all, ordinary concrete itself has permeability, and water accumulation is a long time or water accumulation will seep water to varying degrees under a certain pressure. Therefore, waterproof concrete is mostly used for components and structures with high waterproof requirements. Concrete roofing designs are generally ordinary concrete, with waterproofing membranes on top.

or other waterproof materials, concrete roofing concrete is mainly load-bearing and forming enclosure space.

Concrete roof panels are generally made with a slope (I think it was usually 12%, and the flatness is good enough to drain the rainwater. The leakage may be caused by:

1. The concrete surface is uneven, and the water accumulation time is too long, causing leakage. It's not too much;

2. The root of the roof chimney, the elevator room, the roof inspection manhole, the exhaust hole and other roots are of poor quality of flooding, causing water seepage;

3. Daughter wall.

Plastering cracks, or cracks in the top pressing, water seeps in from between the brick surface and the plaster, which is in the northern region.

The most common, before the plastering cracks, after the rainwater seeps into the plastering before winter, it forms ice in winter, and the frost heave cycle will crack the plaster;

4. When the waterproof membrane is laid from the root of the parapet wall upwards, it does not reach the top or is not firmly pasted, and the drip edge of the top is not done, or when it is not done well, it flows under the insulation layer between the Yishun parapet wall and its waterproof membrane and penetrates into the floor slab;

5. The waterproof layer is leaked or poorly bonded, or it may also be due to artificial activities or large hailstones.

causing damage and causing leakage;

6. Gutter. The waterproofing quality is poor, especially the gutter drainage, and the waterproofing membrane needs to be carefully constructed to do a good job, where the incidence of water seepage is very high.

The above are the most common causes of roof leakage. In addition, most of the leaks found indoors are not roof leakage points, and it is very troublesome and difficult to find roof leakage points. When looking for leaks, you can start from the above itemized reasons, carefully check and analyze, and often get better results.

If necessary, the waterproof layer should be partially uncovered for inspection.

That's because there is a problem with the ratio of sand and cement, there is more sand, less cement, and after drying, not only on the outer surface, but also inside the concrete to form a void, and the water will seep down the gap, so it will leak. If the sand-to-ash ratio is correct, the concrete-poured roof is very strong and will not leak. Do you drip?

During the pouring of concrete, some small cracks will appear due to shrinkage and settlement. In addition, concrete has a waterproof effect, but it is not 100% waterproof, and water can slowly penetrate downward. It is best to patch the cracks in the roof with cement first, and then apply the flexible waterproofing twice.

Finally, it is covered with a waterproofing membrane. This is generally fine for ten years.

There are many reasons for the non-standard vibration that causes the concrete to be not compacted, the use of the concrete finishing machine to disturb the concrete and cause cracks, and the concrete shrinkage to produce cracks.

Leakage of a concrete-poured roof may be caused by insufficient seismic conductivity during concrete pouring, or by the hollowness of the concrete due to the presence of debris.

The water leakage must be because the waterproof layer is not properly fitted, and it doesn't matter whether it is the antifouling of concrete pouring.

That's because the waterproofing of the roof is not done well, and there are quality defects such as cracks in the structure during roof construction, which leads to roof leakage.

That means that the concrete is not poured well enough, and there is water seepage.

Why does a concrete roof still leak? In my opinion, if you use this method, you will definitely not leak.

There is a high probability that the roof will leak if it is poured with concrete, and even if waterproofing measures are taken, there will be a possibility of water leakage.

When we use concrete to pour the roof, we must pay attention to the waterproofing problem, because no matter what kind of concrete we use for construction, if we don't do waterproofing, there will definitely be water leakage in the house in the later stage.

Just like what a friend asked now: how to pour concrete to build a roof without leakage? Roofs are actually divided into flat roofs and pitched roofs, and due to the pouring of pitched roofs, the requirements for concrete pouring technology are relatively high, so I won't tell you here.

The main reason for the leakage of the roof layer is the cracks on the surface of the concrete, and the water is not drained in time when it rains, and there will be water seepage. Therefore, let's talk about how to prevent cracks in the later stage of concrete in the pouring process.

<> during roof construction, the steel bars should be tied in place, the double-layer steel bars of the roof panel must be fully tied, the steel bars at the junction of the roof beam and the gutter beam and the roof panel must be tied in place, and the negative reinforcement of the roof panel should be supported, and the negative reinforcement shall not be trampled on during construction;

The floors of the houses that have been built are cracked and leaking, and some people in the countryside now use iron tents. My friend's house was leaking on the floor, and I told him to try tiling the floor and leave some slopes, and he did, and I heard that there was no leakage.

This requires good drainage, and the waterproofing agent in the concrete can also reduce leakage, of course, as long as possible curing, but also to reduce concrete cracking, if the concrete itself can be laid in an ideal state, it will not leak water.

to reduce the porosity of concrete. After the concrete is poured, if it is in high temperature, it must be covered and cured now, this step is very critical. The basic meaning is that after pouring the concrete 8-12 hours, it must start to be laminated on the surface of the concrete.

If the cast-in-place roof is not covered with tiles, we often face a problem, that is, if the pouring is careless, the roof will leak rain in the future. Don't underestimate this leak, it's a particularly annoying thing. Most of the roof slabs in rural areas in the south are only 10 12 cm, and the floor reinforcements used are basically single-layer reinforcements.

When the cement solidifies, the single-layer steel bar cannot occupy the position of the concrete protective layer, and cannot effectively prevent surface cracking.

1. If we achieve better anti-leakage performance, our best way is to do waterproofing during construction, we can do a waterproof layer, and then pour a waterproof protective layer of about 5 cm on it, so as to ensure that our roof achieves better waterproof effect all year round. 2. To ensure that the roof has a certain flowing water slope, the slope will be larger with the rainfall area, and for the roof construction, we must use a manual vibrator to mix the concrete evenly to ensure the stability of its structure, and the concrete density of the roof is high, and the natural waterproofness is also better.

During roof construction, we need to use a manual vibrator to mix the concrete evenly to ensure the stability of its structure, so as to ensure that there will be no water leakage.

Waterproofing is done after the roof is poured and then covered to ensure that the house does not leak.

Attention should be paid to the selection of concrete materials, and at the same time, it is also necessary to pay attention to the steel pavement of concrete when pouring the roof, and timely maintenance should be carried out after the roof is watered.

How to make a concrete poured roof without leakage? The master teaches you to do 4 points well, and the waterproof effect is good.

Concrete does not have a waterproof effect, and water leakage is a normal phenomenon, so it is necessary to do professional waterproof treatment on the roof after the concrete is poured to prevent water leakage.

Reinforced concrete is a very rigid material, and the interior is porous and prone to penetrating cracks under the influence of stress and load, which can easily lead to water leakage. Not only do it, but also do a few more waterproofs, at least 2 or more waterproof layers. Because the roof is exposed to the sun and rain, the temperature changes greatly, and the environment is harsh.

Concrete belongs to cement cement, there will be cracks if the maintenance is not good, and the sun will also be exposed, and the normal principle of thermal expansion and cold contraction.

The so-called dripping water through the stone, the roof will often be exposed to wind and rain, and after being drenched by rain for a long time, there may be cracks on the surface, and water will easily penetrate into it; After pouring with concrete, improper maintenance in the later stage may cause water leakage; There may be cutting corners in construction, so it is inevitable that there will be water leaks.