Wall moldy solution

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During the rainy season, the air was humid and some of the walls in the house had serious moldy appearance. Experts believe that the mildew in the two readers' homes is caused by a temperature difference. Experts said that the emergence of such problems should strengthen the insulation effect of the wall, while replacing the water-resistant putty with water-resistant putty.

Three conditions cause moisture in the wall

The walls are mostly mouldy because of the dampness of the walls, and the walls are generally wet for three reasons.

The first reason is that leakage occurs to the supply, drainage pipes, or heating pipes, causing the walls to get wet. Over time, the walls will become moldy.

The second reason is that external rainwater seeps into the room, causing the wall to become wet. The baffles under the balcony windows (mostly made of prefabricated floor slabs, so cracks easily occur at the junctions with the walls), cracks at the intersections with the walls, or poor window sealing performance may cause external rainwater to seep into the room.

The third situation is: wall insulation is not done well, resulting in a large temperature difference between indoor and outdoor, so that the water in the indoor air will condense on the wall after cooling, resulting in wall moisture.

The first case can be eliminated by doing a pressure test. If the pressure test fails, it means that there is a certain leak somewhere in the pressurized pipe. According to Ms. Xia's description, the moldy phenomenon is more obvious and serious in winter. It can be confirmed that Ms. Xia’s home wall mold is not caused by the second reason, because the second case mostly occurs in the rainy season.

Wall temperature caused by indoor and outdoor temperature mold

The moldy wall in the home is basically the external wall of the building. There are also several cracks in the balcony wall. The moldy phenomenon becomes apparent in the heating in winter. Therefore, the diagnosis of the moldy wall is because the wall insulation is not done well.

The method of checking whether the wall has been heat-treated is simple. A hammer is used to knock the wall. If the sound is empty, it indicates that the wall has a heat insulation layer. If the sound is dull, it indicates that the wall has not been used as a heat insulation layer. For the specific conditions of Ms. Xia’s home, it is recommended that it check for cracks in the external walls of the building. If there are no cracks, it indicates that the insulation material is not working. Replacement is required. This is also a radical approach.

The method for removing mold is to remove all the original putty on the moldy wall and then re-treat the wall according to the normal wall construction procedure.

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