How to Fix Window Leaks When it Rains

how to fix window leaks when it rains

Leaking window repair is what everyone has to do at least once in their lives. Windows are similar to a human, which grow old after some time and may not work well without good maintenance.

So, how to fix window leaks when it rains, what should you do? Everything will be revealed in the subsequent content. Keep reading it and you will see.

How To Fix Window Leaks When it Rains

1. During the rain

Whatever you do during the rain, it’s only temporary. No one wants to get outside in the middle of the heavy rain only to repair a leak. To prevent water from flowing through the leak and dropping on your floor, you need to find some absorbent material and place it on the place where water flows in.

It can be a towel, cloth, or sponge. Just cram it into the leak and it will absorb the water for you. You may want to put a bucket right under the window. So, it will be convenient to remove water from the absorbent material when it is all wet.

2. After the rain

After you have survived through the rain with the simple method above, it’s time to start permanent leaking window repair and end the leak once and for all. There are two common ways that you can follow and I will show you each recommended step.

Caulk the leak

The best method that can extend the durability of the windows up to 15 years is to caulk them. Normally, the water spills through the windows because of the disintegration between the wall and the frame. Therefore, before caulking anything, you need to test where that breakdown lies on the windows.

You can do that by burning several incense sticks and hold it near the window frame. Where their smoke flickers into the house is where the leaks are. Use a pen to mark it and we will begin repairing the windows.

Step 1: Remove the old caulk

Putty Knife - Repair Leaking Windows During Rain
Putty Knife

Before working on leaking window repair, you need to identify where the old caulk is and remove it. Otherwise, the new caulk will not have any spare space to absorb and the leaks may continue.

The old caulk is located on the interstice between the frames and the wall, the frames and the windows, and where the windows meet one another. You can use a putty knife or scraper to thrust and pick all the caulk out.

Step 2: Prepare the caulking gun

This step will take only some seconds. If you don’t have a caulking gun and tube yet, you should buy them now. Before starting the process, insert the tube into the gun. Make sure that they fit perfectly with each other so that the caulk will spray evenly on the leaks.

Then, cut the tip of the caulking tube nozzle. If the leaks are small and you only want a sufficient amount to cover it, cut a little, which is about a quarter-inch. That is quite enough for most cracks. If you desire for a larger amount, just cut the nozzle down further.

Step 3: Puncture the seal

It is relatively important to do this step because it decides how well the caulk flows. To make it coherent, you can insert a nail or the tip of a hanger through the hole on the nozzle that you have just cut. After that, push it down until you feel that it has punctured the seal.

Step 4: Apply the caulk

Caulk Gun - Repair Leaking Windows During Rain
Caulk Gun

Now, we come to the most crucial part. It’s time to seal the leaks. Use the gun to spray the caulk on them. Ensure that you move it slowly along the cracks and don’t use too much pressure on the trigger.

After you have done with the leaks, you can start applying the caulk on the interstice between the frame and the wall to prevent further damage in the future.

Step 5: Smooth the caulk

When you have filled all the leaks and the caulk is still wet, use a spoon, ice cream stick, or your wet finger to smooth it. This will make the surface of the window look flat and beautiful.

Step 6: Wash away the remaining caulk

Finally, clean the caulk remaining on the nozzle, around the tube (if any), your hands, and any other place before it dries with paper towels. Therefore, the equipment will be protected and can be used next times.

That is how leaking window repair is done with caulk. It’s not so difficult, isn’t it? However, although that method is appropriate for most cases, sometimes, the problem is not that serious. The leak can be fixed by…

Replace the weather stripping – Temporary Fix for Leaking Windows

The old and unqualified weather stripping can be the primary reason why there are leaks on your windows. And the most optimal solution is to replace it immediately. To find out how to identify it, you need to understand what type of your window is

Sliding ones: The weather stripping is right in the frame that sticks to the wall, where the operable portion can slide.

Single-hung ones: The weather stripping is right in the frame that sticks to the wall, where the operable portion can be lifted.

To successfully replace the weather stripping, you only need 6 steps:

Step 1: Remove the old stripping by cutting on each corner of the opening window and pulling it out.

Step 2: Use a damp rag to clean the sides where the old strip has just been removed. Then, allow it to dry thoroughly

Step 3: Measure the length of the window frames that you are going to insert your weather stripping to. After that, cut the strips in the same or more extended length.

Step 4: Slide or lift the operation portion

Step 5: Peel off the back of the strips but leave the top untouched

Step 6: Stick the new strips to their place and peel off the back of the top, where you have left it the previous steps.


Why is my window leaking water when it rains?

The most common cause of window leaking when it rains is poor window installation. Windows need to be installed properly and with the proper flashing and caulking in order to prevent water from seeping into your home. Poorly installed windows may not have been sealed correctly, or the wrong type of materials may have been used during installation.

Another potential cause of window leaks is a lack of proper maintenance. Over time, caulking and sealant can deteriorate or crack, allowing water to enter through these areas. It’s important to periodically inspect your windows for any breaches in the sealant or other damage that could be causing leaking problems.

Finally, it’s possible that your windows are simply too old or in need of replacement. If your windows are more than 10 years, it may be time to consider replacing them together with newer, better-performing models.

How do you stop water from coming in from the top of a window?

The best way to stop water from entering through the top of a window is by installing a rain screen. A rain screen is an impermeable barrier that prevents water from reaching the window, while still allowing airflow and sunlight to pass through.

You can also install flashing at the top of the window frame or around it in order to help seal out water. Make sure that the flashing has a waterproof sealant and is properly installed to prevent water from getting through.


I believe you have discovered the answer to your question: how to fix window leaks when it rains. Don’t hesitate to send me the result of your work or any question you have in mind. I would be glad to answer them.

Moreover, if you like my article, do share it. Various people are managing to fix their leaks on the windows just like you. Lastly, thank you for reading and I will see you in my other writings.

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