Window Defogging: How to Go About Doing It

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Home Window Defogging: How to Go About Doing It

It’s a common problem that homeowners typically face— foggy windows. No matter how much you try to eliminate them, they keep returning. This issue could be caused by poor window insulation, too much moisture in your home, or a broken or malfunctioning heater. Depending on the issue, the solution to this problem could vary.

This blog post will discuss how you can easily defog your window glass and how professional window-defogging service providers can help.


A Malfunctioning Window Seal

Most windows should come with an insulated window seal meant to prevent fogging. If yours isn’t doing its job, it may be time to replace your windows. However, you can always try a few other alternatives first.

You may not have noticed, but your windows have two panes with space in between, where you can usually find your screen. efficiently filled with air that helps with your home’s energy efficiency and helps manage the temperature inside.

When the seal between the two panes starts to deteriorate, it will cause your windows to look cloudy.

So, what exactly causes these seals to deteriorate? The answer could be excess water between the planes after a rainstorm, exposure to too much sun, or a combination of both. It could also happen over time as the seal gets more worn.

To fix this problem, you can use a defogging spray on your windows that will help prevent your windows from fogging up any further. But unfortunately, this is only a temporary solution that won’t permanently solve your problems. Eventually, you will have to replace your entire window.

Too Much Moisture in Your Home

Another common cause of window fog is caused from when your home has too much humidity in it. This can be caused by cooking, laundry, and everyday activities.

Aside from the excess moisture causing your windows to fog up, it can also be a catalyst for mold, mildew, rotting wood, and a high electricity bill in your home. This moisture will also build up between your window panes and causes fogginess. You can solve this issue by purchasing a humidifier in your home.


Ensure you use the ventilator in your bathroom when showering and keep the door closed so that the moisture and humidity can’t escape and stick to your windows. Keep your fans on when cooking to prevent the same thing from happening.

Keep furniture away from your exterior walls.

A Broken Heater

A broken heater is another reason your home’s windows are fogging. Again, the different temperatures inside and outside will cause your windows to fog up.

While you can purchase a defogging spray to apply on your windows, you can also use a small layer of shaving cream to prevent more fog from building up. Of course, you will also want to get your heater fixed.

Window Defogging

If you’ve tried everything you can think of to get rid of the fog in your windows and nothing seems to be working, it may be time to call a professional for a defogging window treatment.

This treatment involves removing the water from your window panes by having a professional drill small holes in the windows to let the moisture out. They will close the holes once the windows are dry and the fog is cleared.

This process can be complicated if you have a lot of moisture in your windows, as it can take a while to clear. It can also take a few months for the treatment to become permanent.

Many people are hesitant to try the window defogging treatment because it’s a new treatment with flaws. For one, some parts of the window may have other cracks that will continue to allow moisture in despite having drained it the first time.

Because this process isn’t guaranteed to work, many people choose to get their windows replaced entirely.

Replacing Your Windows

The best solution to getting rid of foggy windows is to replace them. However, before doing this, it is best to hire a professional to come and check out the damage on your windows before you make any drastic decisions. A professional can tell you if the damage is severe and provide repair options.

Replacing your windows can be extremely costly, especially when it includes removing everything from the double-pane windows to the seal. You can always opt-out for a partial replacement, which involves having someone come in and replace your window seal.

Preventing Window Fog in Your Home

The best way to avoid dropping hundreds of dollars on window repair is by doing everything possible to prevent your windows from fogging.


The first thing you want to do is make sure that your home has proper ventilation. This is incredibly important for your health and those who live with you, so your windows don’t continue to fog up over time.

If you are in the position to do so, another way to prevent window fog is to install energy-efficient windows in your home. They can help regulate the temperature in your home, thus keeping your windows from fogging. In addition, most of these windows come with a lifetime warranty, so even if you need window replacement, it won’t cost you a dime.


You may want to go around and inspect all of your windows, especially during times when you are expecting heavy rainfall. The quicker you catch any defects, the easier it will be to get them fixed.

When it comes to getting rid of moisture in your home, you can purchase a humidifier, as mentioned earlier, or you can make sure the ventilation in your home is good by leaving fans on to get the air circulating. This will also prevent all the hot air in your home from sticking to your windows and causing fog.

Lastly, you can also protect your windows by purchasing a window film kit. This comes with a protective film for your windows that regulates the temperature and prevents fogginess. Even better, this can also prevent moisture from entering your window panes.


Windows are meant to be clear, not foggy. If you find that they are constantly fogging up and you can’t figure out why, it could be caused by poor ventilation in your home, too much humidity, or moisture getting in between your window panes.

If you’re dealing with mildly foggy windows, you can use a defogging spray to prevent them from becoming cloudy. However, if the problem persists despite using a defogger, it may be necessary to call a professional window glass defogging service provider. Contacting a window specialist will help you explore your options. Depending on the severity of the issue, they may be able to provide professional defogging services. Sometimes, it might be necessary to consider replacing the windows altogether. But, again, consulting with a professional will help you determine your situation’s most appropriate course of action.

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