October brings beautiful fall colors and crisp, cool air to the Carolinas. As we spend more time indoors and turn on the heat, you might notice something new: water droplets on your window glass.
The Iced Tea Effect
When warm, moist air comes into contact with cooler surfaces, condensation appears. Think of a glass of iced tea on a hot summer day—the glass sweats because the cold surface meets warmer, humid air. In the fall and winter, the reverse happens in your home. The outside air cools the windowpane, and the warm, moist air from your heated living space condenses when it hits that cold glass.
Are Your Windows to Blame?
It may appear like your windows are to blame, but windows do not actually cause condensation. Instead, your windows are acting as an alarm, alerting you to excess humidity trapped inside your home.
If your older windows were drafty, those cracks let the wind in, but they also allowed your indoor moisture to escape outdoors. Newer, tighter windows help reduce heating costs and limit drafts by creating a strong barrier, which means indoor humidity can no longer easily escape.
Signs of Invisible Moisture Damage
Daily life generates a surprising amount of indoor moisture. Cooking three meals a day adds 10 cups of water to the air, and every shower contributes even more. If window condensation is a frequent issue, that trapped humidity could be causing hidden problems elsewhere. Watch out for these signs of excess moisture:
- A damp feeling or musty odors in the home
- Sweating pipes
- Cracking, peeling or blistering paint on interior or exterior surfaces
- Warped wooden surfaces, mold or mildew
Tips for Reducing Indoor Humidity
You can easily combat fall condensation by managing your home’s moisture levels. Make sure to run an over-the-range exhaust fan when cooking, and let your bathroom exhaust fan run until the mirror is clear after bathing. Vent gas appliances and clothes dryers, and avoid storing firewood indoors.
Taking a little time to monitor your home’s humidity will help you enjoy the changing seasons without worrying about hidden moisture damage.
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