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When Is Window Condensation Considered a Bad Thing?

Condensation is a phenomenon that happens under the right conditions of temperature and humidity. In the context of windows, it occurs when hot, humid air comes into contact with the cooler window surface, resulting in the accumulation of water droplets.

For many homeowners, it only means one thing: there’s something wrong with the windows and they need to be repaired or replaced immediately. However, condensation can also be a harmless occurrence. This begs the question: “When is window condensation a bad thing?” Local replacement window contractor Renewal by Andersen® of Rapid City sheds light on the matter here.

Condensation Inside Windows

Keep an eye out for condensation forming inside your windows. It often happens because of steam from your stove pot or shower, but it can also indicate a ventilation problem in which your home has above-average levels of humidity.

Too much moisture inside your home creates the perfect environment for mold and mildew growth. If not addressed promptly, expect some members of your household to suffer respiratory ailments. The same problem can affect wooden and metal components, leading to rot and rust, respectively. These problems can compromise your home’s structural integrity and weaken your home’s insulation.

Condensation In-Between Window Panes

Every window installation company knows that energy-efficient windows have multiple panes of glass that give them better insulation. They have frames to hold the panes in place, an insulating gas like argon in between panes, and an airtight seal to keep that gas in.

If you see something foggy between the panes, it means that the airtight seal is broken. With no argon gas in between the panes, water vapor can find its way through the gaps of the damaged seal and form water droplets whenever the temperature of the glass drops below the dew point of the surrounding air. At this point, the windows are rendered useless and need to be replaced.

For your residential window services needs, turn to Renewal by Andersen of Rapid City. Investing in our energy-efficient windows presents a unique opportunity to improve your home’s curb appeal and energy efficiency. Learn more about our products by calling (605) 341-7831 or filling out our contact form to schedule a consultation. We serve residents of Rapid City, SD.


"The Andersen crew was very prompt and professional, and was finished in 1 day. Great!"

Terri Vaughn
May 10

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