What causes water seepage on exterior walls? What should I do if there is water seepage on the exter

There must be a reason for the leakage of the exterior wall, and it will not leak for no reason. Here I have analyzed three reasons for you, let's take a look

1. The scaffolding eye is not completely blocked. When the exterior wall is built, there will be many scaffolding eyes left on the wall, and the blockage of the exterior wall scaffolding eye is not involved in the quality inspection and evaluation standards, and the workers do not pay enough attention to it ideologically, just plug it casually, when blocking, the mortar is not easy to achieve compactness, do not do any technical disclosure and prompts, and rely greatly on the follow-up process (hook joints, plastering, etc.), resulting in the leakage of the exterior wall surface from here in the future, and bring irreparable losses to the construction unit, the construction unit and the residents.

2. The fullness of masonry mortar is not enough. In the actual masonry of porous bricks, use a shovel to scrape the mortar vertical joints from the mortar layer that has been paved, so that the mortar layer is concave, and if the saturation is not high, it will not meet the requirements; The paving mortar is too long, the masonry speed can not keep up, and the moisture in the mortar is absorbed or evaporated by the bricks, so that the bricks and the mortar lose their bonding; When building a clear water wall, in order to save the scraping work, the mortar method of large shrinkage is adopted, and the wall is built with dry bricks, so that the mortar is dehydrated in the early stage and the strength grade is reduced, and the powder on the surface of the dry brick plays an isolation role, weakens the bonding between the brick and the mortar, and causes the fullness of the mortar to be insufficient, thereby causing the occurrence of water seepage.

3. The defects of the perforated brick itself. The inside of the perforated brick is a vertical hole, and the impermeability of the material itself is relatively poor, because the exterior wall is generally not designed to be waterproof, and the exterior wall is easy to leak under the long-term watering of rainwater. At the same time, when a leak occurs somewhere in the exterior wall, the water will spread out from top to bottom along the holes in the wall under the action of gravity, and manifest itself in the weak parts of the interior wall, leaving a problem for future treatment If it is difficult to find the leakage point, you may have to ask a professional company to help.

If the connection position between the external wall column of the frame structure and the relevant question is not buried, the setting of the tie bar is not firm, or the spacing, length and quantity of the tie bar do not meet the requirements of the standard, when the difference in temperature expansion coefficient is relatively large, it will cause the cracking of the connection position and form a frequent area of water leakage; In the process of building wall construction, the mortar of the leveling layer and the plastering layer is not configured according to the standard design, which causes the change of mortar strength and the leakage of the wall based on the occurrence of dry shrinkage cracking problem;

For the key treatment of the leakage part, the method of opening and grouting is adopted for the leakage part for local treatment, but because it is a structural treatment, it is often difficult to get the residents, and it is easy to misunderstand, and it is difficult to deal with it. Moreover, it can only treat the surface, but cannot fundamentally solve the problem, and often after treating a leakage, the water may leak out from another weak point.

1. Factors in the construction of the filling wall: remove the plastering layer of the inner wall from the seepage part of the outer wall, and you can see that the vertical joints of the wall have "blind joints", some gray joints are even transparent, and some scaffolding eyes have not been sealed with bricks, but they are just blocked with some mortar.

2. Decoration factors: the cleaning of the brick base of the exterior wall is not clean, the base treatment is not in place, the plastering of the screed layer is relatively thick, and the brick masonry does not pour the water through, resulting in the phenomenon of cracking and hollowing of the screed.

3. Installation factors: when installing the rainwater pipe, the root of the supporting angle steel is not blocked with mortar, and some residents are not sealed with mortar when installing the air conditioner, and the bolts used to fix the protective frame are not sealed with mortar, and the perimeter of the exterior wall pipe is not blocked, all of which have led to water seepage on the exterior wall of high-rise residences.

There are generally many reasons for water seepage on external walls, which generally depend on the specific situation, and are generally caused by the following factors.

a) Design factors.

Waterproofing treatment is an important quality project in housing construction engineering. In practice, based on the difference in the performance of waterproof materials and the difference in the climate between the north and south of China, the waterproof design of the house has a certain complexity, and once the waterproof design of the project has problems, it will directly cause the leakage of the exterior wall of the house.

2) Material factors.

The various new wall materials used in modern housing construction basically have the characteristics of large porosity, strong water absorption and poor anti-permeability. Therefore, in the process of masonry, the cement mortar in the mortar joints, especially the vertical joints, is generally difficult to achieve the effect of fullness and squeezing, and the connection position between the wall and the beams and columns of reinforced concrete, the window frame and the wall is often cracked due to the difference in the performance of the material, and then causes the leakage problem of the wall.

3) Construction factors.

From the perspective of construction, there are relatively many problems of external wall leakage caused by construction technology and construction technology

First, the connection position between the outer wall column of the frame structure and the relevant topic is not buried, and the setting of the tie bar is not firm, or the spacing, length and number of the tie bar do not meet the standard requirements, and when the difference in temperature expansion coefficient is relatively large, it will cause the cracking of the connection position and form a frequent area of water leakage;

secondly, in the construction process of the building wall, the mortar of the leveling layer and the plastering layer is not configured in accordance with the standard design, which causes the change of mortar strength and causes the leakage of the wall based on the occurrence of dry shrinkage cracking problem;

Thirdly, in the construction process, there is a problem of insufficient adhesion between the exterior wall bricks and the mortar of the bottom, which then causes the occurrence of hollow drum disease, and the hook joints of the facing bricks are not dense enough, and the problem of trachoma or cracks occurs, causing water seepage on the wall;

Fourth, the construction of the slope of the window sill, the drip chute and the olecranon and other details of the building is not well handled during the construction, which is easy to cause wall leakage due to rainwater infiltration;

Fifth, in the process of building construction, the sealing treatment of various pipes through the exterior wall and different reserved holes is not done, which will also cause leakage of the wall of the building building.

The main cause of leakage in the exterior wall.

1. The scaffolding eye is not completely blocked. When the exterior wall is built, there will be many scaffolding eyes left on the wall, the blockage of the exterior wall scaffolding eye is not involved in the quality inspection and evaluation standards, the construction personnel, including a part of the management personnel, do not pay enough attention to the ideology, just send people to plug at will, when blocking, the mortar is not easy to achieve compactness, do not do any technical disclosure and prompts, and rely greatly on the follow-up process (hook joints, plastering, etc.), resulting in the leakage of the exterior wall surface from here in the future, bringing irreparable losses to the construction unit, the construction unit and the household.

2. The fullness of masonry mortar is not enough. In the actual masonry of perforated bricks, with a shovel from the mortar layer that has been paved to scrape the mortar drape vertical joints, so that the mortar layer is concave, and the fullness of the mortar can not meet the requirements; The paving mortar is too long, the masonry speed can not keep up, and the moisture in the mortar is absorbed or evaporated by the bricks, so that the bricks and the mortar lose their bonding; When building a clear water wall, in order to save the scraping work, the mortar method of large shrinkage is adopted, and the wall is built with dry bricks, so that the mortar is dehydrated in the early stage and the strength grade is reduced, and the powder on the surface of the dry brick plays an isolation role, weakens the bonding between the brick and the mortar, and causes the mortar to be full enough, and water seepage will be generated.

3. The defects of the perforated brick itself. The inside of the perforated brick is a vertical hole, and its material itself has poor impermeability resistance, because the current exterior wall is basically not designed to be waterproof, and the exterior wall is prone to leakage under the long-term watering of rainwater. At the same time, when a leak occurs somewhere in the exterior wall, the water will spread out from top to bottom along the hole in the wall under the action of gravity, and manifest itself in the weak place of the interior wall, leaving a problem for future treatment and unable to accurately find the leakage point.

Water is from the cracks of the exterior wall or brick joints and other gaps into the wall, the general wall is brick, itself absorbs water, water storage, more, and then infiltrates from the weak point of the inner wall, from the outside treatment is a fundamental solution, but it is generally unlikely to be repaired from the outside, so it can only be repaired from the inside, repaired from the inside depends on the adhesion and waterproofness of the material on the back water, more information, better advice, free concrete waterproof leakage water repair technical advice, free of today's repair, tomorrow's leakage, annual repair, every year leakage troubles.

There are many reasons: 1. If it is a brick masonry, the mortar mortar mortar joints are not full, and the outer scaffolding eye is not tightly sealed.

2. The water seepage of the concrete wall is caused by the cracking of the wall. 3. Caused by poor plastering quality of the outer wall of the wall.

It is caused by small cracks in the exterior wall.

We should all understand that if the external wall leakage is serious, it will reduce the durability and safety of the engineering structure, because there are voids and cracks in the concrete, and there are also voids and cracks in the blocks and mortar of the masonry. If aerated concrete blocks are used as exterior wall filling wall masonry materials, special mortar masonry should be used, and the wall should be reinforced with metal mesh or glass fiber mesh cloth.

In fact, it is not difficult to prevent this problem, and there are no economic or technical difficulties. However, if you don't pay attention to it, it will be very troublesome and costly, which will cause great trouble to users! , chisel the hollow drum part of the cement mortar layer, and then repair and level with polymer cement mortar, and the polymer cement mortar should be layered and pressed, and the thickness is based on the wall repair and smoothness.

If there are no cracks in the wall, water will not seep in. This method has minimal damage to the wall, and only a nail is needed to solve the problem of water seepage. Undertake waterproof plugging projects.

The window is also a high-risk area for leakage, because the window frame is installed in parallel to the indoor wall, if the tile paving is not perfect, and the structural adhesive of the window frame is not well treated, it will bring serious water seepage hazards to future leakage. One is the process trouble, and the other is the cost trouble. The main problem is who will pay for the cost, the exterior wall repair generally needs to build a frame or a high-risk construction of a hanging rope, the amount of work is large, the cost is not small, and the other is which process is used to deal with it, and how big the involved area is.

Exterior wall leakage is very tricky, the most difficult is pasted with tiles, if the exterior wall leaks, the indoor putty layer will fall, because it is the exterior wall leakage all the liquid materials can not be repaired, because the flow can not flow inside the joint, only on the surface, the surface is too thin, cold shrinkage and thermal expansion will crack again. For water seepage on the exterior wall, the seepage part should be chiseled out of the exterior wall tiles and stucco layer, and the area should be chiseled larger, and then the base surface should be exposed and then waterproofed. Clean the wall first, sprinkle water to moisten it but there should be no standing water.

First, mix with glue and cement to form a plain mortar brush with a thickness of 2 mm.

Water seepage on the exterior wall is related to the materials used, and poor base materials will lead to water seepage on the wall. Modern new wall materials have poor permeability. Various pipes that pass through the wall leave holes that are not well sealed.

For the hole part of the wall, you can use a penetrating waterproofing agent to spray the waterproofing agent on the hole after cleaning the hole.

1. What are the causes of water seepage on the exterior wall:

Design Factors:Waterproofing treatment is an important quality project in housing construction engineering. In practice, based on the difference in the performance of waterproof materials and the difference in the climate between the north and south of China, the waterproof design of the house has a certain complexity, and once there is a problem in the waterproof design of the project, the exterior wall of the building will also be affected.

Material factorsThe various new wall materials used in modern housing construction basically have the characteristics of large porosity, strong water absorption and poor anti-permeability. Therefore, in the process of masonry, the ash joints.

3. Especially the cement mortar in the vertical joints is generally difficult to achieve the effect of fullness and squeezing, and the connection position between the wall and the beams and columns of reinforced concrete, the window frame and the wall is often cracked due to the different properties of the material, and the wall is prone to leakage.

Second, how to solve the leakage of the exterior wall:

The exterior walls are all re-waterproofed。The advantage of this method is that it can completely solve the leakage problem, but in fact, this method is too expensive and time-consuming, and most of them will not be done.

Focus on the leakage site:For the leakage part, the method of opening holes and grouting is used for local treatment, but because it is a structure, it is often difficult to get the residents, and it is easy to misunderstand, and it is difficult to deal with it. However, this method does not solve the root cause of the problem, and often after one leak is treated, the water may leak out of another weak point.

The organic polymer waterproof material is used for the overall treatment of the exterior wall. At present, this kind of products on the market are mainly silicone-based permeable waterproofing agent, the requirements for the outer wall base are not high, after cleaning the base layer, use the crack repair agent to mix cement to fill the large holes and gaps on the wall, and then use the sprayer to spray the waterproofing agent directly on the exterior wall.

Water seepage on the exterior wall: This is because the waterproofing of the exterior wall is not done well. Then it led to water seepage on the facades, and then the gaps those were not treated well. A layer of waterproofing should be done after the exterior wall is re-removed.

The reason is that the water pipe inside the exterior wall is broken, so it will leak, first replace the broken water pipe, and then let the exterior wall dry and repaint the latex paint again.