How to solve the problem of water leakage from cracks in windows and walls of a house? After using solid glue once, it still cracked?

We all know that the windows at home are fixed in the window holes in the wall. When installing the window frame, there will be some gaps between the window frame and the wall, so that some materials can be poured to stabilize the window frame and prevent leakage. leak. There are two ways to deal with the gap between the window frame and the wall:

1. The first is to use foam glue to fill it, that is, pour it into the gap between the window frame and the wall. Foam glue makes the window stronger and therefore has a certain waterproof effect!

2. The second method is a more common method when installing windows in our self-built houses, which is to use cement mortar to fill the window edges. I personally think this method is better than using styrofoam. , because the hardness of cement mortar after solidification is higher than that of styrofoam, it is better than using styrofoam to reinforce window frames and waterproof coatings, and it is also more affordable, but the construction operation is really more troublesome?

Why are there cracks between the windows and the wall?

As mentioned just now, the gap between the window and the wall is left when the window is installed. This is inevitable because the size of the customized window cannot just fit the "window hole" reserved in the wall. ”, so there will be a certain gap between the window frame and the window opening, firstly to facilitate installation but also for later filling to make the window frame stronger and avoid leakage.

In addition to these "intentional" gaps, there is only one phenomenon in the cracks between windows and walls, that is, after the interior or exterior walls are decorated, it is easy for us to Cracks were found on the wall next to the window. Brother Yu can give you several explanations for this phenomenon:

The first point is that the shrinkage of the wall decoration (the principle of thermal expansion and contraction) is related to the window frame or door frame. The phenomenon of separation is formed, resulting in cracks!

The second point is that the gap between the window frame and the window opening is not filled enough, or the decoration material does not cover the window frame when decorating the exterior wall or indoor wall. If there is a gap between the window frame and the wall, If the gaps are not filled tightly, the shrinkage will increase and cracks will appear on the wall decoration. When decorating the exterior wall, that is, when doing brick wall plastering (plating) work, the mortar on the exterior wall should cover one-fifth of the window edge, forming a "covering" rather than a "splicing" "That's all!" That's why we can see the cracks in the walls and windows.

The third point is that if the above two situations are eliminated, the only issue left to talk about is the quality of the decorative materials. For example, the quality of the styrofoam is substandard or the filling is substandard? Or it may be that the cement mortar is not filled densely or the cement mortar shrinks too fast and cracks appear, just like the cracks in the plaster layer on the wall, which can generally be summarized as the window frame. The reason is that the connection cannot be made or the connection is too thin.

The fourth point is that the cement mortar used for wall plastering shrinks and appears cracks (as shown in the picture above), because the gap between the window frame and the wall is not filled densely, and the material of the wall plastering layer The shrinkage separates from the window frame, forming cracks and causing leakage!

To sum up, the above are all causes of cracks in window frames and walls. How should we deal with this situation? Based on my experience, I have summarized the following processing methods, and I would like to share them with you!

1. Treat the disease from the outside. Leakage near windows is mostly common on rainy days, and can also be classified as leakage from the exterior wall, so stopping leakage from the exterior wall is the fundamental solution. That is to say, when decorating the exterior wall, the wall plaster must wrap around the window (around 1/4 of the window), so as to reduce the risk of leakage. However, when the exterior wall is decorated, the plaster layer does not wrap around the window, so special treatment is needed. As this friend said, applying solid glue once can also prevent leakage, but it must be applied from the window edge of the exterior wall. Apply rather than smearing from inside the house, because it leaks from the outside into the house, so stopping the leakage from the outside is fundamental! In addition to solid glue, you can also use glass glue, waterproof paint and other products to fill the cracks between the window and the wall, which can also have a certain leak-proof effect!

2. Govern from within. If it is a high-rise building and we cannot repair the leakage problem of windows from the outside, then we can only find a solution from indoors, because when it comes to high-altitude operations, for the sake of safety, it is better to solve it indoors.

Repairing this kind of leakage problem from the inside is actually not more ideal than repairing it from the outside, but special treatment will be given in special circumstances. The method of governance from the inside is basically the same as that of governance from the outside, but some details need to be paid attention to.

(1) To control the leakage at the window from the inside, you must first fill the gap between the window frame and the wall. Personally, I suggest that filling it with cement mortar is better than using foam glue. Because the waterproof performance of cement mortar after solidification is higher than that of foam glue, you can find a way to fill the gaps in the window frame tightly. The simple way is to shovel off the wall decoration around the window frame and fill the gaps, especially the bottom groove of the window, because leakage often occurs at the window sill.

(2) If there is no way to fill the gap in the window frame, for example, if you don’t want to make any major renovations, you can start with the walls around the window and use waterproof paint to cover the window. Paint the entire wall, or focus on the window edge, which means filling the cracks between the window and the wall with waterproof materials, so that the leakage can be effectively solved (the shelf life depends on the severity of the leakage or The quality of waterproof coating is determined).