More and more friends are replacing our original windows during home decoration. However, many friends will find such a problem, that is, water leakage may occur after the windows of our home are replaced, and the probability of water leakage is extremely high. So what exactly causes water leakage after windows are replaced? The following is a brief analysis and summary for everyone.

How to deal with water leakage in newly replaced windows You need to know these things before replacing the windows!
The plastic steel windows on the balcony have been waterproofed twice, and they are all new, and they have been waterproofed twice, but they still leak after heavy rains. What is the problem?
The plastic steel windows on the balcony are all new, and they have been waterproofed twice, but they still leak after every heavy rain. What is the problem? Problems generally occur in two locations: First, the junction between the window frame and the wall, which is a problem with window installation. The second is the problem of the window itself. Therefore, for window leaks, we must check the specific location of the leak and then find the cause. Below, we will answer the question of window leakage from these two aspects.
[1] Water leakage caused by window installation problems
The so-called water leakage caused by window installation problems means that the plastic steel window we replaced did not seal between the window frame and the wall when it was fixed to the wall. Then when there is rain, the rainwater slowly penetrates into our homes along these gaps. This is also the main reason why most windows leak.
Reason analysis: 1. We did not fill the gap between the replaced window frame and the wall with effective foam. Because the plastic steel windows we replaced are directly fixed to the wall, there are gaps between the wall and the window frame. If these gaps are not filled properly, water can easily enter. 2. There is no effective waterproof seal between the window frame and the wall. After the exterior windows are installed, sealant must be applied both on the inside and outside. Sealant is the key to waterproofing. 3. The upper opening on the outside of the window is not well-shaped. In other words, every time there is rain, it will flow down the doors and windows, which is also very detrimental to the waterproofing of the windows.
Solutions: 1. We must first check the specific conditions on the outside of the window. Generally speaking, water seepage around the window frame must be caused by the opening of the window glass glue. At this time, I suggest that you remove all the sealant to expose the foam glue inside. 2. Use a tool such as wallpaper knife to carefully clean the foam glue, and then re-apply the foam glue on the outside. Be sure to fill the foam in the gap. 3. We need to clean the window frames and walls, and then apply sealant. The width of the sealant must be at least 20mm. The qualifying standard is that the sealant must be tightly connected to the window frame and wall without any cracks.
Attention: We also need to pay attention to the specific conditions of the window exterior walls. Because replacing windows may cause damage to the exterior wall, if there is water leakage from the window sill, you should also check whether there are cracks in the outer wall around the window frame. If there are cracks, these cracks must be removed and then re-waterproofed. Otherwise, water will keep entering our homes along the cracks.
[2] Water leakage caused by problems with the window itself
There are two common problems with water leakage caused by window problems: one is that the drainage system of the window itself is clogged, and the other is caused by the lax sealing of the profile of the window itself or the glass. The leakage water in these two situations will flow along the window frame to the window sill, so the characteristics are obvious. The details are as follows.
Case 1: The drainage system of the window itself is blocked
means that the main frame under the movable fan of our window has no drainage holes or the drainage holes are blocked. At this time, rainwater pours into the inside of our main frame. When the rainwater reaches a certain level, it will actively overflow into our room. Eventually, water leaks appeared around the windows.
processing method: ①. We must first check the drainage hole under the window opening sash.If there is any debris blocking it, use a small brush to clean out all the debris inside. Make sure the drainage hole can drain water properly. ② If we find that there is no drainage hole on the outside of the window frame, we must find a professional to open the drainage hole. Because if there are no drainage holes, water leakage will inevitably occur. ③. Check whether the location of the drainage hole is reasonable. In other words, the drainage holes must be able to ensure normal water flow out without causing accumulation of water.

Situation 2: Water seepage caused by window profiles and glass
Water seepage caused by window profiles or glass, which means that the rainwater will slowly flow downward along our window frames, and sometimes water can be seen on the glass. At this time, the cause of these problems is basically that the profile or glass is not tightly sealed.
Cause analysis: ①. The sealant on the outside of the glass is open. Because when fixing the glass, first use the bead to fix it to the main frame, and then apply glass glue to the edge of the bead. If the glass glue is not applied tightly or there are cracks in the glue, water may seep in. ②. The plastic steel windows we use are all spliced together with profiles. If there are gaps between the profiles, water leakage will also occur.
Treatment measures: ① If it is found that water leakage is caused by lax sealing of the glass, the sealant on the outside of the glass needs to be reprocessed. Generally, the sealant on the glass needs to be removed directly, and then the sealant will be applied again as required. ② If we find water seepage in the window profiles, we will definitely be able to find the gaps between the profiles on the outside of the window. For gaps, conventional sealant can be applied for treatment or plastic steel profile can be used for repair welding.
Conclusion
Regarding the leakage of plastic steel windows at home after the replacement, most of the reasons are due to the failure of the seal between the main frame and the wall. Therefore, if you replace windows at home, you must carefully observe the seal between the main frame of our windows and the wall. Conventionally, it is filled with foam glue and then sealed with sealant. Finally, everyone should also focus on checking the drainage holes of our windows, as well as the sealant and profiles on the window glass, to ensure that our windows will not seep or leak.