What could be the cause of mould on the walls? What should I do?

Due to the aging of closed windows, mold or water will appear on most walls. For example, glass adhesives, including adhesive tapes, are aging. In the event of storms and strong winds, it will be blown away sideways by the wind.

If the seal on your window breaks, the rain will be blown into the house by the wind. When rain and a lot of water vapor enter the room, they will gather in a cold, airless part of the home. For example, behind the door, behind the bed, behind the curtains.

Eventually, it can carry mold to the roof or wall. So, if you feel that your windows are leaking or the seals are softening and deforming, you need to replace them gradually. If water and mold can be seen near the window, there may be a leak in the plaster layer of the window.

The wall of home decoration is mainly divided into three layers, and the inner layer is the structural layer, commonly known as the empty wall. The structural layer, i.e. the plastering layer, is then plastered with mortar and putty. Finally, the paint on the stucco layer, that is, the outer layer of paint.

Filtered water on the wall can cause fungus to multiply Plums Low humidity during the rainy season leads to mold Wallpaper glue is not dry enough and will not mold Treatment method: Remove the paint from the damp part and peel off the wall. Clean the walls and ceilings to be repaired.

Apply putty (twice) decorative paint on a waterproof brushIn fact, problems such as cracking, peeling, water seepage, swelling and mildew of the wall are often caused by poor materials, non-standard construction or dampness of the wall.

Therefore, in addition to strict adherence to the rules during the early construction process, good eco-friendly building materials are also essential. The windows we bought were difficult to match perfectly with ours. This requires the mortar of the plastering layer to be extended to the window frame in order to fill the joints during installation.

However, due to long-term exposure to wind and sun, this layer of mortar ages and cracks appear, resulting in loss of points, problems with the plastering layer, and cracks in vertical and horizontal passages. When it rains, when rainwater flows along the outer wall of the wall, the rainwater flows through this gap between the structural layer and the modular layer, and the gap between the modular layer and the structural layer disappears. When there is a leak in the plastering layer, rainwater seeps directly into the inner structural layer, and then a large area of water and mold infiltrates from the inside out.

You can open the window and take a closer look. If you find that the files around the window are corrupted, you need to fix it.

It may be because the walls are too damp, or it may be because the home is particularly damp, or of course it is because the walls are leaking, so you should repaint the walls immediately, and then put some dehumidification bags on the surface of the house.

It may be caused by dampness at home, it may be caused by the back to the bathroom, it may be caused by the bathroom waterproofing, or it may be caused by the moisture-proof work at home, which may lead to mold on the wall. It can improve the environment of the home and improve the atmosphere of the home, so that the mold of the wall can be solved.

I think the mold on the walls is mainly caused by dampness. In this case, the following methods can be taken: first, open the window for ventilation and keep the room dry, and the mold will be reduced; Second, you can turn on the air conditioner to keep the room dry; The third is to use better paint to repaint.

This may be caused by water leakage, or it may be caused by the fact that the wall is empty, and the wall is not treated, and the weather will also cause it.

Maybe it's because the weather is humid and the rainy season is coming, so the walls are moldy, keep the house ventilated and dry as soon as possible, and use a dehumidifier, so it's okay.

1.Use alcohol or 84 disinfectant water to treat moldy walls

If the mold on the wall is not serious, you can use a brush or dry towel to remove the mold on the wall, it must be a dry brush or towel, otherwise it is very easy to make the wall more serious. After brushing the mold spots on the wall, wipe the wall with a rag dipped in alcohol or 84 disinfectant water.

2.Use bleaching powder

If there are a lot of mildew spots, you can use bleach powder (the ratio of bleach powder to water is 1:99) after wiping with alcohol, and spray the bleach powder mixed with good water on the moldy wall.

3.Do a good job of waterproofing and moisture-proof walls

The wall mildew is due to the fact that the walls at home are not waterproof and moisture-proof, or the walls are waterproof, so we also need to paint a layer of waterproof paint on the wall after removing the mold spots on the wall, so as to prevent the wall from growing mold again. Then there is the fact that we should always open the windows in our homes for ventilation.

What are the reasons for the resurgence of moisture on the wall?

1.There is a large temperature difference between indoor and outdoor. The first situation may be that the wall insulation is not done well, resulting in a large temperature difference between indoor and outdoor, and the water vapor in the indoor air is pre-condensed to the wall, which will cause the wall to be wet and cold for a long time.

Not sure if it is caused by wall insulation, there is a very simple way to check, you can try it yourself: use the inspection hammer to knock on the wall, listen to the sound, if the sound is relatively low, it means that the wall is not well insulated; Conversely, if there is a crack, it is an indication that the wall has an insulation.

2.Leakage occurs in the drainage pipe. Residential property owners in northern China also need to pay attention to checking the heating pipes in their homes.

Leakage in the pipeline, over time, will also lead to the wall moisture resurgence, mold. You can ask a professional staff to do a pressure test to check.

3.Then there is the rainwater seeping into the room. This situation usually occurs because the junction between the cover plate under the balcony window and the wall is not properly treated, there are gaps, or the airtightness of the window is not good, which will also cause rainwater to seep into the room.

In this case, you must pay attention to the leakage of the wall, it is likely to be caused by the leakage of the wall, the house is relatively wet, there is a problem with waterproofing, and this place must be renovated.

It can be treated by alcohol disinfection, or you can also choose to use some waterproof materials to open windows for ventilation to dissipate.

We can use desiccant to remove, and the effect of waterproofing should be achieved in the later stage, and secondly, desiccant should be sprinkled around the strong area, which can also avoid problems in the later stage.

There are two reasons why a wall can become moldy

1. The waterproofing of the wall is not done well, the pipe in the wall is leaking, and it has been in a dripping and wet state for a long time, and the water seeps into the wall, which will lead to mold on the wall.

2. The temperature difference between indoor and outdoor is large, and the wall insulation is not good, especially when the season changes, the front will be damp, resulting in mold on the wall.

How to deal with mold on the wall:

1. The pipe in the wall is leaking, resulting in mold on the wall, and the treatment method is to chisel the wall to repair the pipe in the wall, and the repair should be repaired, and the replacement should be replaced.

2. The temperature difference between indoor and outdoor is large, and the wall insulation is not good, resulting in mold on the wall, so it should be treated in this way, please ask a professional master to insulate the wall, and if there are cracks in the insulation, it should be repaired.

Use a professional wall mold remover.

It has the effect of mildew prevention and mildew removal, and it can be restored as long as it is sprayed on the moldy place for 30 minutes. The most important thing is that it is non-toxic and harmless. Save money, effort and time;

1. The mold of the wall is due to the dampness of the room, and people are prone to rheumatism when they live in this environment for a long time.

2. The moldy wall will emit mold spores, which flow in the air and enter the human body to invade the respiratory system and multiply rapidly. Long-term exposure to mold can cause respiratory diseases and allergic symptoms.

3. People with low immunity may also cause headaches, fever, or mucosal inflammation, and in severe cases, carcinogens will be produced.

Reasons: 1. The temperature difference between indoor and outdoor is large, and the wall produces condensation. 2. The bathroom is only waterproof and does not prevent moisture-proof problems.

Solution: 1. Brush the wall with anti-alkali sealing paint. 2. The wall scrapes the insulation mortar or does internal insulation.

3. In the decoration stage, pay attention to the treatment details of the bathroom floor, and be sure to make secondary drainage. 4. Remove the door stone and brush the rigid waterproof. 5. Brush the floor of the wet area of the bathroom with transparent waterproof paint.

If there is mold, you can use a brush to scrub off the mold, and then spray the wall with water with bleach, and wipe the wall after scrubbing. Usually open more windows and open more doors for ventilation, so as to avoid mold.

If the wall is moldy, you can gently brush it off with a toothbrush, do not use water, first sterilize with alcohol, mix water and bleach powder to clean the mold on the wall, pay attention to ventilation when cleaning, wear protective gloves and masks.

Use a toothbrush to wash away these mold spots, and if it's hard to wipe off, pour some alcohol to stop mold growth.

First of all, scrape the moldy part off with a scraper, then reapply paint or paint, and then brush another layer of waterproof paint on the outside, and then paste a layer of waterproof wall covering.

If you encounter such a thing, you should first dispose of the moldy part of the wall, and then repaint it again, or paste it with wallpaper or something.

You can choose to treat the moldy wall with alcohol or 84 disinfectant, and then paint the moldy wall with bleaching powder or wall repair paste to restore the wall to its original state.

The reason for the mold on the wall: because the waterproofing of the wall is not done well, the pipe in the wall is leaking, and after a long time, it has been in a wet situation of water seepage, and the water seeps into the wall, which will cause the wall to seep. The temperature difference between the house and the outdoors is large, and the wall insulation is not very good, especially when the season changes, the front will be damp, causing water seepage on the wall.

It is very likely that when the house is decorated, the workers are shoddy, and the bricks of the wall are not tightly embedded and not filled with the bottom of the wall, which will cause the wall to be built but not rounded and have gaps. After a long time, it is easy to seep water into the wall and reverse moisture. It is very likely that there will be some problems in the structure of the house itself, which will make the water and moisture in the body unable to be discharged, and over time, there will be dampness and mildew.

Especially in the humid summer, the water seepage in the house will be more serious.

Post-treatment of mold on the wall: When decorating, it is necessary to clarify the structure of the house, and before moving in, find a professional staff to test the environmental humidity of the house. Be sure to buy a regular wallpaper mold remover, so in the spring and summer when it is very easy to grow mold, an appropriate amount of paint can also effectively prevent and solve the mold situation.

In the rainy season, we must close the doors and windows in time, and when the temperature is good, we must timely indoor ventilation and maintain indoor air convection, which can also effectively maintain the humidity and temperature in the environment and prevent dampness and mildew. If the economic development conditions are available, a dehumidification function equipment can be configured at home, so that it can effectively dehumidify and prevent mildew.

If there are black spots due to water seepage on the wall, you can use a rag to remove the mold in time to prevent the growth of germs. Then spray it with bleach, or change the paint to paint the wall again. For serious mold wall decoration, use sandpaper and ash knife to completely remove the mildew spots, and then replace the mold remover, 84 disinfectant or bleach solution to spray the wall; Repair and level the wall with putty powder, and the long-term wet and cold wall should be waterproofed on the ground (the leakage of the wall should be searched and repaired before); After the putty layer is dried, the closed topcoat and mildew removal thickened alkali primer are painted; Paint to remove mildew paint.

The main reason for the moldy wall is that the environment in the home is too humid, so it will cause the wall to be moldy; After the wall is moldy, you should shovel the moldy place, and then reapply new paint, and be sure to ensure that the environment in the home is very dry, so that you can, otherwise it will still be moldy in the future.

The moldy phenomenon on the bridge deck is due to the heavy moisture in the home, so you must ask a renovation company to help deal with it.

The moldy walls are caused by the dampness inside the home; It is necessary to open more windows for ventilation to avoid too much humidity in the home, pay attention to dryness in the bathroom, and clean up the ground in time if there is water.