19+ Causes & Fixes to Get Rid of Inside & Outside Window Condensation

It’s a sunny morning, and you open the curtains to see the beautiful day. But alas! The windows are wet again, and it ruins the view. But why?

One thing you probably don’t pay much attention to is the moisture in your homes. But while it seems like a little thing, it can drastically affect your home interiors when in excess. Interior and exterior condensation can lead to moldy walls, sweaty pipes, and other problems. That’s why we show you all the causes of inside and outside condensation. You’ll get fixes to get rid of it too!

condensation pump in box

Why is there condensation on my windows?

There could be several reasons for inside and outside condensation on your windows, and most are under your control. Let’s go through them!


For every person that showers in your home, half a pint of water is added to the air as moisture. It is especially the case in winter when the showers run super hot! A quick fix is to open a peek of the bathroom window. Or start the exhaust to air out the bathroom.

condensation pump in box


When you live with a family, you cannot avoid the necessities like showering and cooking. But when you cook thrice a day, you tend to add plenty of water to the air. To be specific, you’re adding 4 to 5 pints of water. This can be reduced drastically with an exhaust fan in your kitchen while you cook.

You can also turn on a ceiling fan or table fan in the kitchen if there is any.


Plants next to a window can cause the release of moisture into the air. It might be a good idea to move them around and place them away from the windows.

Problems caused by condensation

window condensation

At first, sweating on windows doesn’t seem like much of a problem. But if you see this happen every day, it is safe to say there might also be other signs of humidity in other places around the house.

In walls, excess humidity can lead to the growth of mold and mildew around the house. It also causes musty odors to prop up.

In cupboards, you can expect some blistered and swollen interiors.

The ceilings will be stained and have peeling paint if humidity isn’t addressed. The humidity can also reach inside walls and cause freezing in the insulation. This eventually leads to structural damage inside homes, causing walls to weaken and ceilings to leak.

Besides visible wet windows, humidity can even reach between double-paneled glass panes. It requires more attention and care than either side since it cannot be accessed as easily.

It is common knowledge. However, that old homes will tend to have more porous walls that attract humidity. Nowadays, houses are built with modern insulation to keep air leakage out. Hence, the chances of humidity wrecking havoc on building structures are fewer.

We take you through the best 19 ways to reduce humidity and improve your family’s and home’s health.

How to get rid of condensation on inside and outside windows

  1. Turn off the humidifier.

    Let’s go through the obvious one first. The humidifier is often used in places where the air is extra dry, which causes skin problems and other irritants. You may bring it in to enhance the moisture, but it may lead to excess humidity over time. If you spot a musty smell, wet windows, and sweaty pipes, turn off the humidifier for some time.

  2. Shower time care

    When you take care to go through a regimen of showering, add a dehumidifying step to the list. Here, you must take care to open a bathroom window. You can also turn on the exhaust fan if you have one installed. Now proceed to shower carefree.

  3. Kitchen care

    Every time you cook a meal, you’re adding at least a pint of water in the air. You have to turn on the exhaust fan whenever you cook. It will help keep the water out as well as keep the kitchen cool.

  4. Relocate plants

    It’s a pretty sight to have some vases near the window. But you don’t realize the condensation they are causing to the screen just above them. Keep a dedicated area for plants away from window sills, like on the porch or backyard. Plants should be kept outdoors entirely if you are going through a humid spell in your home.

  5. Practice opening windows

    Since most activities happen during the day, it’s a good idea to open windows when you’re awake. Close them at night for security purposes and to keep the cold out in winters. Open windows will circulate wind inside the home and reduce moisture.

  6. Raise the heating

    Temperature control can be your best friend in eliminating wetness around the house. Since cold glass panes cause the air inside to condense on it, you can increase the temperature. By doing this, you will raise the temperature of the windows and cause water to evaporate.

    Think of this as similar to the function you use in the car when the windscreen fogs up from the inside.

  7. Apply weather stripping

    Weatherstripping is a good option if you want to do away with moisture altogether. It is the process of sealing all entry points for rain, wind, snow, and draft on windows. Since it keeps the warmth inside, it also saves household energy. Gasket or foam weatherstripping is effective in thus also keeping humidity out.

  8. Use storm windows

    Another energy-efficient and dehumidifying solution are storm windows. Tighter and stronger windows are attached to the outside of your regular windows. They help keep frost, snow, and rain out all year long. Hence, they are particularly useful in colder areas and wintertime.

    With the help of storm windows, your interior windows won’t fog up. Moisture will be kept out.

  9. Use fans to your advantage

    Circulating air in the house will reduce moisture instantly rather than keeping the air still inside your house. Keep fans on clockwise to elevate the cool air and push the hot air to the floor.
    It is tougher to keep fans on during the winter, but you can do this in rooms that aren’t in use and rotate likewise.

  10. Use a dehumidifier

    If you’re looking for a bigger and foolproof solution, you can buy a dehumidifier to aid your situation. While bigger ones cost you between $200 and $300, a mini dehumidifier can even cost as little as $50 in total! So you’re in for big savings and less moisture!dehumidifier

  11. Undraw the curtains

    Condensation is likelier to occur when your windows are covered. If you’ve got drapes or curtains, open them wide. Let the sunshine in and the trapped heat out! If you’ve got blinds, pull them up and let the trapped moisture out. Closed heavy drapes are likely to trap more moisture than light, airy curtains too!

  12. Firewood storage

    If you’ve got a fireplace inside the house, you’ll naturally be bringing in firewood for the kindle. But just as plants will make the place more humid, so will firewood. It’s a good practice to keep this outside your house and only bring them in when you’re about to light them.

  13. Light the fireplace

    Since we said raising the temperature is a good fix for when it’s humid, you can do this with fire too. Lighting a fire every night will raise the temperature inside and the glass windows too. All wetness will evaporate soon enough! Of course, the fire keeps you warm too.

  14. Install an air-to-air heat exchanger 

    This product is used to increase the indoor air quality of homes. It also helps to clear out pollutants that are inside the house. Naturally, a by-product of it is the controlled levels of humidity in the home owing to the circulated airing. It aims to bring fresh air into your home without opening doors or windows. This is thus great for winters!

  15. Get a window insulation kit. 

    It is a simple and budget-friendly way to keep the frost out of your windows. Window insulation kits are just clear films that are stuck over the window. Just clean and dry your window frame, blinds, and surrounding areas.

    Now stick the film onto the frame as directed. Make sure to keep the wrinkles out, and the film stretched tight. Now you’ve got a solution that keeps the heat in and the cold and wetness out!

  16. Vent appliances correctly

    Before installing any new product, you must install the exhaust vents towards the outside. Whether it be your dryer, gas appliances, or air conditioning units, every vent should be outside the house. It can be hung just outside the window or in a backyard area.

    For instance, keeping the clothes dryer vent inside the home will make your home more humid every time you dry your clothes.

Wait for the sun 

In the case of exterior glass panels, just waiting for the sun to shine can clear the frost away. In the morning, the glass temperature is lower than the dew temperature. It causes the frost to form.

The sun evaporates all that and results in a clean, dry glass. However, there will still be watermarks all over the glass. You can clean it using any glass cleaning liquid and a microfiber cloth if the window opens enough.

Use rain repellant

Besides cars, rain repellants can also be used on windowpanes to ward off the morning dew. When you apply rain repellants on the glass, the water tends to slide off like beads of pearls instead of sticking there like usual. Kiwi Camp Dry and Rain X are some popular options.

Try condensation-resistant paint

When moisture gets even the best of walls, you’re forced to take extreme measures. Anti-condensation paint is used to insulate your walls better. It can often be matched with the color you desire in the room.

The coating resists moisture and keeps your walls tightly secured from air leakage.

How do you get the moisture out of double pane windows?

It is tricky, but we’ll take you through the steps one by one.

Grab a drill machine

We know it sounds crazy. But it’s a risky but effective procedure. Grab a drill machine and insert a small attachment.

Drill small holes

We want two small holes drilled at the top of each side of the window and one at the bottom. It is the high-risk part since windows can shatter if you don’t drill correctly. If you aren’t a pro, call one to do this part.

Insert the material

Now insert desiccate packets or isopropyl alcohol into the holes. It will absorb all the fog between the two panes and lead to clean windows in the future too. You can add even more in a few weeks when the effect starts to wear off.

Window condensation absorber

It is a quick fix that you can hang anywhere. They are bigger versions of the small pellet packets you find in clothing and shoes to keep moisture out. Hang these packets in your closet, near the window, kitchen, or bathroom to keep everything nice and dry.

Best products to tackle a humid home

Some tools can certainly help you keep your home dry. Check them out!


Once you’ve got all these causes and fixes out of the way, we can head to some other questions readers often have.

ventilation being improved
Why is there condensation on my windows?

When a home gets too humid, the coldest part of a wall cools it and forms water. That part is usually a glass window. Thus when the hot air touches the cold glass, it condenses into water. This results in moisture inside the home. Sometimes water can form on cold walls as well.

How can I reduce the humidity in my home?

The easiest way to do this is to keep your home well ventilated with open windows, ceiling fans on, and exhaust fans working when you cook. You can also get a dehumidifier if the levels are too high. A mini dehumidifier works great if you only want to accommodate one room, not a whole house.

Other tips include keeping plants away from windows and firewood stored outside the home. You can keep neat packets of moisture-absorbing pellets around the house that are budget friendly and very effective.

For exterior water on the windows, you can use rain repellant to make rain, sleet, or snow slide right off your glass panes. When the sun comes out, even the remaining traces are wiped off.