According to the truth, if the external wall leaks, it should be repaired from the external wall. However, if repeated repairs are ineffective or inconvenient, you can also consider starting repairs indoors. Let Brother Yu give you advice!
First, find the point-to-point leak location.
The so-called "point-to-point leakage position" refers to the external wall leakage point and indoor leakage position, which can be a straight line or a diagonal line. In other words, through what way does the leakage of the external wall flow to the room?
For example, the external wall leaks in the upper part of the wall, while the indoor leakage point is in the underground part of the wall, which is also called "diagonal point-to-point leakage" or "ectopic leakage". In this case, there may be left and right deviations. The so-called "point-to-point" leakage is a straight line leakage point, that is, the leakage position of the external wall is opposite to that of the indoor leakage position.
Only by clearly knowing how the "route" is leaked can we make corresponding countermeasures. Because point-to-point prevention can fundamentally solve the problem.
Second, targeted treatment.
Point-to-point leakage handling method: refer to the above method to find the leakage path, and the problem will be much easier to handle. For example, as a reference from the figure, the indoor water leakage point is also at the location of indoor wall leakage, so we can do protective treatment from the location of indoor water leakage.
Step 1: First shovel off the wall skin at the leaking position to check the severity of the leaking problem. If only leakage occurs, the indoor wall skin is wet, and there is no alkali return and cracks on the wall surface. This kind of water leakage only occurs in rainy days, and the lighter situation will not cause great negative impact! It seems that it is not difficult to solve the problem. You can shovel off the wall skin and use waterproof materials to prevent leakage. When brushing waterproof material, it can be properly spread on the wall around the leaking position, and the effect will be more ideal!
Step 2: If the leakage is serious and the problem cannot be solved by shoveling off the wall skin to make the surface waterproof, then the problem can only be solved further. That is to say, we should not only shovel off the wall skin, but also shovel off the wall foundation until the brick wall is exposed, or chisel some into the brick body.
After going deep into the leakage position, clean up the dust left when digging the wall, and then fill the gap on the wall with cement mortar. After the cement mortar is solidified, waterproof materials shall be used. 1 leak-proof.
Step 3: After the leak-proof work is finished, it is time to resume the wall decoration. Smoothness and color difference should be paid attention to in local repair and restoration of wall decoration. The highest requirement is that it is not obvious after repair is the best standard after repair!
Treatment method of displacement leakage: Ectopic leakage is a kind of leakage phenomenon different from the leakage point of external wall, which is relatively troublesome to deal with because the leakage point is not in the same position. It stands to reason that this situation should be better from the leakage point of the external wall, but if it can't be operated from the external wall, it can only be solved from the inside!
1. Find out the "path" of the leak from the indoor leak location by "tracing", that is, find the entrance of the leak. In this case, we can judge the "line" of water leakage according to the humidity of the wall, that is, we can find the root of water leakage according to the traces left by water leakage on the wall.
2. If the leakage trace on the wall is not obvious and difficult to detect, in this case, it is inevitable to shovel off the wall skin, which may be not only partial, but comprehensive, that is, shovel off the whole wall skin, so that it will be easier to find the leakage problem from the brick wall.
3. After finding the leakage point, the treatment method is the same as the above-mentioned "point-to-point" treatment method, and the most effective method is four steps: digging the wall, filling, leakage prevention and repair.
To sum up, the above methods can effectively deal with indoor water leakage, but sometimes it will be more troublesome and costly. Brother Yu doesn't recommend repairing the leakage of the external wall from indoors if necessary.