Why does the roof still leak after it is covered with waterproofing material?

Introduction: In many families, the roof is made of a lot of waterproof materials, just to prevent it from raining.

will leak. On the contrary, there was a water leak in the house on a rainy day. Many people say that they are very puzzled by this, so today I will tell you why the roof still leaks after being paved with waterproof materials? <>

After building a house, there are actually many reasons for the failure of the waterproofing of the roof, the most important reason is the construction reason, waterproof construction, in the process of waterproofing waterproofing, it is more likely to have problems, that is, he did not clean the base layer, resulting in insufficient waterproof layer bonding, and there will be a compartment. In addition, because the method of membrane paving is now cast-in-place, although it is better than in the past, it cannot guarantee 100% watertightness. In this case, after ten or eight years, there will still be water leaks.

If you ask everyone, are you afraid of water leaks in your house? Then sure nine out of ten people's answers will be afraid of water leakage, because water leakage is a particularly frightening and annoying thing for building a house, just like if it rains heavily outside, then there will be light rain inside the house, and if it rains lightly outside, it will still rain lightly inside the house, and a good renovation will be ruined. 's home has also experienced this, and it has not worked many times to do waterproofing.

The roofs of houses are generally prefabricated panels.

First of all, do a good job of insulation, and then go to the level.

Make a waterproof layer, this is the right way to prevent water leakage. First of all, if you want to solve the problem of water leakage, you must understand the roof structure of your house, and solve the problem one by one. The function of the roof is to protect human production and life from natural disasters.

Therefore, in the decoration process, waterproofing must be done well, and professional waterproof materials must be used for waterproofing.

This may be because there is a gap in the roof somewhere that is too large, and even if waterproofing material is applied, it does not prevent the leak.

It may be that the structure of the roof is not very good, and some water is easy to collect, so the waterproofing material will not have much effect.

Either the rain is too much, or the quality of your waterproofing material is not good, so it will leak.

If this happens, it means that there is a problem with the construction when doing waterproofing, so it will continue to leak.

This should be a problem with waterproof coatings, inferior waterproof coatings are very bad, they can't play a waterproof effect at all, and they are easy to leak.

Causes

1. The problem of materials, waterproof coatings must be selected with high quality, do not choose inferior materials, the waterproof effect of inferior materials is really too pitiful, generally after a cycle, there is no waterproof effect.

2. The problem of the construction of the workers, the workers may be in a hurry to do the roughness, the rejection of the membrane is not dealt with well, and the uneven brushing is also the reason for the poor waterproof effect.

3. The problem of household pipes, the interface of the pipeline is also a very important place, and the water leakage may be in the pipe interface and the yin and yang angles, that is to say, the waterproofing of these points is not in place and has not been dealt with well. Therefore, the position of this node must be dealt with well, waterproofed with mortar, and then waterproofed after coating, so as to ensure that this will not happen.

Waterproof application

1. The waterproofing of the project mainly refers to the water that can be seen in the open water. A small amount is made to protect the building from water vapor and moisture erosion. The main materials in this area are coils, polyurethane and so on. The construction requirements are high and the process is complex.

Second, the waterproofing of home decoration refers to the waterproof common sense, waterproof materials and waterproof technology related to family life. Including but not limited to waterproof and moisture-proof treatment of roofs, toilets, balconies, exterior walls, kitchens, basements, swimming pools and other locations. This subdivision is taking shape, the construction requirements are relatively low, popular, and practical.

Water leakage in China's buildings is widespread, especially the roof leakage is more serious, according to statistics, it has reached 95%, the root cause is that the national water quality protection period is only 5 years, resulting in the average level of waterproof materials in the market is not high, and developers have no motivation to use good materials.

Why does it leak and why does it leak after repeated repairs?

Now the building is basically a reinforced concrete structure, concrete is a rigid material, natural cracks, so must be through the attached waterproof layer to solve the problem of leakage, only by the concrete additives, is not able to fundamentally solve the problem, this is why one of the waterproof principles is the combination of rigidity and softness, "rigid" refers to the quality of concrete, which is fundamental, "soft" refers to the additional waterproof layer, used to fight cracks.

Understanding this principle, it is not difficult to know that if rigid waterproof materials are used to control water leakage, it is difficult to achieve good results. The reason for repeated leaks after repeated maintenance lies in the inappropriate waterproof materials selected.

At present, the cement-based waterproof coatings such as JS waterproof coatings commonly used on the market are rigid waterproof coatings, which can not resist the cracks of the base layer, and the waterproof layer itself will crack, and some customers have done it 6 times and leaked, which is the reason.

Due to the existence of such a deficiency in rigid waterproof coatings, it is called flexible waterproof coatings by adding elastic additives to improve crack resistance, which is called flexible waterproof coatings.

Therefore, from the perspective of crack control, only elastic waterproof materials can be selected. At this point, it is necessary to consider other aspects.

Due to the various waterproofing membranes, there are major hidden dangers in bonding with the base layer, lap joint treatment itself, and strengthening the treatment of details, so although it can play a good waterproof role in theory, it cannot be done in practice, therefore, the use of waterproof membranes should be avoided as much as possible for household waterproofing.

Until now, all that was left was the elastic waterproof coating. If you want to leak water, what else do you need to consider?

First of all, the aging resistance, the actual life under the actual use conditions, not the laboratory life, many elastic coatings such as polyurethane waterproof coatings can not be immersed in water for a long time, can not be exposed to use, can not be corrosion-resistant, these in practical application caused by the life is greatly shortened, resulting in repeated leakage. There is also the physical strength of the coating, some elastic waterproof coatings have weak physical strength, too delicate, and easy to break, so only the physical strength is high, and the leather is durable. There is also the bonding performance with the base layer, no matter how good the material, it will be in vain to fall off, and some materials have good performance in all aspects, but it is a pity that it is poor.

Finally, the construction should be simple, no professional technology is required, and anyone can dry the waterproof material to form a reliable waterproof system. To sum up, it is currently recommended to use one-component high-strength environmentally friendly urea-based waterproof coatings, which can be guaranteed for 50 years and relieve the trouble of repeated water leakage.

It's best to make a top or plant grass and flowers.

You are now in one step and find a construction worker to make a color steel roof for you, so as to ensure that your house does not leak for at least 20 years, and can shade the roof and block the sun, so that the temperature in the house will be a few degrees lower in summer and a few degrees higher in winter. In this way, the insulation of the house is better. In fact, many people are entangled in the quality of waterproofing, in fact, many brands of waterproof materials are of the highest quality.

In today's era, the quality is not up to standard, and it is difficult to gain a foothold in the market.

Self-built houses in rural areas are still cast-in-place, which is ten times better than the prefabricated roofs of the past. Even if it is a cast-in-place roof, no one dares to guarantee 100% watertightness, if it is a prefabricated board roof, let alone a leakage is 100%, but there are many cast-in-place, and there are leaks after 8 years and ten yearsA lot of people just think about doing waterproofing. When this problem occurs, everyone will take the waterproof method to solve it in frustration, but some people will find that they have made waterproofing, but it still leaks rain, which makes people crazy.

I built three rooms in front of and back, before the water leakage, there is no way only to cover the iron sheet, waterproof and heat insulation. But I don't think it's the best way, and some places don't let the iron sheet be covered. The best way is to leave no open-air rooftops on it, and directly make glazed tiles on the slope, which are smooth and will not seep water at all, which is the best way.

The leakage area is small, you can consider using waterproof membrane to bake with a blowtorch, or you can use a large area, ** is about 30 per square meter or less, my hometown is my own baking, now 7 years, maintenance 2 times, there has been no leakage. Maintenance is to apply a layer of asphalt oil with a paint roller brush. Now a kind of iron sheet roof is popular, that is, weld the ridge steel frame, and then use the wire on the iron sheet, which is equivalent to the ridge on the roof of the house, the rainwater flows along the iron sheet to the outside, it will not leak, it is said to last for ten or eight years.

No. Because the quality of the waterproof material is very good, and the effect is also very good, with the waterproof material, there will be almost no water leakage.

I think so, because after a few years of use, the roof still leaks.

OK. Now there are many types of roof waterproofing materials, the quality grades are different, the first is very different, and the effect is not the same. It is recommended to choose some professional and regular companies to buy waterproof materials.

The waterproofing coating sets quickly and has very good toughness, completely covering the leakage that needs to be treated. It is non-toxic and harmless, and is a high-efficiency and environmentally friendly waterproof coating. It can be applied by opening the lid and gently stirring, which is simple to use, has good flexibility, and has excellent weather resistance of the coating.

It can be applied on wet or dry substrates, with strong adhesion and high elongation, and can form a flexible and high-strength waterproof coating film after curing.

There was no leakage before the top, and it began to leak after the waterproofing, what is going on, this is caused by the error of the construction procedure:

1. Clean the base layer before doing waterproofing, and test the water storage to see if the base layer is leaking;

3. The roof waterproof layer is best to choose a tire cloth so that the waterproof effect is better (the parapet wall around the roof waterproof house should be turned up 300mm, and grooved on the women's and children's wall, and the bottom of the groove should be wiped with 45 degrees of mortar hypotenuse, and finally the waterproof layer should be pressed into the grooved end and the wall should be flattened with mortar), and the waterproof layer should be sprinkled with sand as a bonding layer on the construction surface;

4. After the roof waterproof layer is completed, the animal water acceptance test should be carried out before the protective layer is done, and the test has no leakage waterproof layer construction, and the next process can be carried out;

5. The protective layer should be C25 fine stone concrete with a thickness of 30 50mm (for slope finding), and 4@500 two-way anti-cracking steel bars should be laid, and expansion joints should be divided according to natural openings, and expansion joints should be filled with asphalt;

6. If you need to make a thermal insulation layer after the construction of the protective layer is completed, you can buy the finished product with feet and arrange it directly, or you can lay bricks, but pay attention to the thermal insulation layer should be 300 500mm away from the parapet;

7. The owner accepts and rectifies the payment handover;

The roof did not leak before, but after doing the waterproofing, it began to leak, then you look for who to do the waterproofing The technical level of the waterproof worker is really not good, it must be that the waterproofing is not done well, and the previous non-leakage place is leaked, quickly let him re-repair, or let him return the cost you have spent, and find another one for repair.

It doesn't leak before 5 o'clock, and it starts to leak after doing waterproofing, because the seam in the middle of you is not covered by waterproofing, so it is very likely that it will leak, as long as you put the sealed waterproof measures and manage them well, they will not leak.

Well, if the roof didn't leak before, and it started to leak after the waterproofing, then it must be okay, that is, he didn't do a good job of waterproofing it.

Hello, this shows that the waterproofing was done incorrectly, destroying the original normal structure, and you should find a waterproof one in this case.

It is best to redo the waterproofing layer, the current roof structure contains an insulation layer, if the leakage is plugged from the leaking position below, it will cause the water on the roof to leak from other locations.

There are more and more leaks in the roof of old houses, do you need to re-waterproof all the roof leaks?

This should be based on the specific situation, if the quality of the concrete roof is very good, only a few point leakage, you can first consider local grouting, after grouting if other places start to leak, at this time it is recommended that the entire roof be re-waterproofed. Of course, if your home is financially okay and the decoration is better, you can consider rewatering all the roofs in any case.

There is a difference between the approach of refurbishing waterproofing and the new waterproofing project, and here are a few ways to choose a solution according to your own economic situation.

1.Removal and cleaning of the aging waterproof layer of the roof - base surface repair and caulking - three times of polyurethane waterproof coating batch scraping - paving thick EPDM rubber waterproof membrane.

2.Removal and cleaning of the aging waterproof layer of the roof - base surface repair and caulking - three times of polyurethane waterproof coating batch scraping - paving thick TPO waterproof membrane.

3.Roof aging waterproof layer shoveling and cleaning - base surface repair and caulking - non-curing asphalt waterproof coating batch scraping - paving 4 thick elastomer or plastic modified asphalt waterproofing membrane.

4.Removal and cleaning of the aging waterproof layer of the roof - base surface repair and caulking - paving of elastomer or plastic body modified asphalt waterproofing membrane (thickness optional).

5.Removal and cleaning of the aging waterproof layer of the roof - base surface repair and caulking - paving thick TPO waterproofing membrane or EPDM waterproofing membrane.

6.Chisel off the protective layer and the insulation layer until the floor slab - grinding and cleaning - paving the waterproof layer - insulation layer construction - fine stone concrete protective layer construction.

I am: Wu Fan, who understands water, coordinates Shanghai, and shares how to do a good job of waterproofing without spending unjust money.