Prevent Condensation on Your Windows This Winter

Jan 05, 2017

Are your windows sweating, even in the winter? It’s not the window’s fault.

Window condensation occurs when the water vapor in the air contacts a surface that has a temperature below the dew point—like your bathroom mirrors after a hot shower.

In the winter, the humidity inside your home can become too high and cause condensation on the windows. The moisture collects most often along the bottom and sides of your windows. It’s a sign you have too much moisture in your home, not a problem with your windows.

Here are a few ways to prevent the build-up of condensation on the interior of your windows:

  • Run the exhaust fan in your bathroom and kitchen.
  • Open the curtains and blinds on your windows to allow more air to circulate. Heavy window treatments, in particular, trap moisture on your windows.
  • Store firewood outdoors. In addition to the safety hazard that firewood presents when kept inside, unseasoned wood (not fully dried) contains up to 45% water. Even seasoned wood can have up to 25% moisture content. In a warm home, this moisture is released into the air.
  • Use a dehumidifier in areas where the moisture build-up is heaviest.
  • Vent the windows a bit. Just like in a crowded car, the windows in your home will fog up with when you have a lot of people in your home.

For any questions about windows and window replacement, talk to us at Johnson County Siding & Window Company. We serve homeowners throughout Kansas City region.


If you know you want to get your home exterior project done, but are feeling stress about paying for it all at once, we can help.

Our financing partner, GreenSky, has sensible payment plans that work for homeowners who prefer to pay in installments. You can also ask your JoCo Siding & Window Co. sales representative about the details!

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- Elizabeth K.

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