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How to Minimize Condensation on Windows

Foggy windows are nothing new to homeowners. Some can get really frustrated by it while others are able to tolerate this nuisance.

How to Minimize Condensation on Windows

In this article, trusted window company, Renewal by Andersen® of Southwest Missouri, discusses how condensation occurs on windows and what you can do to avoid it.

What You Need to Know About Condensation

Condensation is the result when warm, moist air comes into contact with cooler surfaces like your window glass. It’s more common in winter, but it can also happen during a warmer season or whenever water vapor from warm air touches a colder surface. A good example of this is when a glass of cold water sweats. Since the air is warm and moist, and the glass surface is cold, condensation occurs.

Indoor moisture is mostly caused by the activities you do inside your home. It results from cooking, showers or any activity that makes use of water. Vapor pressure usually forces moisture through materials like plaster, wood, brick and cement.

With regards to moisture outside your window, this often happens in spring and fall. During these seasons, the days are usually warmer and the nights cooler.

But before assuming that your windows are bad, take note that condensation isn’t entirely a bad thing. On the contrary, experts see it as an indicator that your windows are tightly sealed and energy-efficient.

Reducing Humidity in Your Home

Although it can be hard to completely stop your windows from fogging up, there are ways in which you can minimize humidity in your home. Professionals recommend homeowners to do the following:

  1. Ventilate the attic and crawl space.

  2. Cover the earth in the crawl space with a vapor barrier.

  3. Vent appliances and exhaust fans outside.

  4. Run an exhaust fan in the kitchen when cooking and in the bath until the mirror is clear.

  5. If you have a forced air furnace, ensure your home is properly ventilated.

Renewal by Andersen of Southwest Missouri offers window replacement services. We can ensure quality workmanship and excellent customer service. Call us at (417) 351-2801, or fill out our contact form to request a free estimate.


"Excellent service and product! They checked in with me every few weeks while we were waiting for the order. I was impressed with Sam, who measured my windows and headed the installation crew. He was respectful and patient with his team. They cleaned up after themselves. Before the new windows I had huge windows that didn’t open. Now I feel much safer and get better temperatures in those rooms."

Kimberly Kester
Jul 18, 2022

"My experience with Anderson Renewal was amazing! From the first meeting with Miranda to choose my windows and doors to the installation provided by Tim and his crew was a pleasure! I just bought a home built in the 1960's that needed new windows and a new double front door with sidelights. As everyone knows Anderson Windows are great, but it was the people I interacted with from Anderson that made it such a great experience. It took three days for the windows and door to be installed and they "worked" every minute they were here. My huge front door took most of the day to install because they had to put in a new header and other improvements to make it fit! They even put up new drywall on the inside. Many people in the neighborhood have stopped by to comment on my beautiful front door! I think the crew left my house cleaner than it was before they started! Constantly cleaning up after themselves. I am thrilled with my windows and feel lucky to have met the team at Anderson."

Kimberly Wilson
Jul 17, 2022

"Very professional staff . No pressure sales. The job they do is neat and clean, no cleanup left for the owner. Communication is great. Always informed on the status of of your product, AND the tin of cookies you receive afterwards is a pleasant plus."

Peggy Spivy Morse
Jul 13, 2022

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