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When is Condensation a Big Problem?

Excess moisture in your home may eventually cause problems. It may be time to take action if you notice the following signs in your house:

  • Condensation remains on windows or doors throughout the day, even when the outside temperature has warmed up.
  • Condensation is forming and running down the walls. It may also be causing discoloration, staining, peeling wallpaper, and blistering paint.
  • The air smells musty or odors from everyday household activities linger too long; this could indicate mold, mildew, or, in the worst cases, rot. Odors increase in intensity with high relative humidity.

Mold, mildew, rot, and/or decay are visible. Mold and mildew thrive in moist areas and can cause health and house damage.

Reducing Condensation

1. Reduce Moisture Sources
  • Stop or severely limit the use of humidifiers or adjust them to the appropriate setting.
  • Run a dehumidifier, if needed.
  • If you care for a lot of plants, group them in one sunny room and avoid over watering.
  • Have your gas appliances checked. Malfunctioning gas appliances can deliver excessive water vapor into the air along with dangerous contaminants. Be sure you have a carbon monoxide alarm.
  • Store firewood outside.
  • Eliminate plumbing leaks.
  • Don’t air dry clothes indoors.
  • Correct grading and drainage problems around the exterior of your home.
2. Increase Ventilation
  • Open a window or door for a few minutes each day, particularly after showering/bathing, laundry, and cooking. Heat loss will be minimal.
  • Run kitchen, bathroom, and other fans longer and more often.
  • Improve or add a ventilation system in your home through the attic, roof, and soffit venting. Ensure everything vents to the outside.
  • Open blinds and drapes. Heavy window coverings restrict the flow of warm air over the interior glass surface.
  • Operate ceiling fans to improve air circulation.
3. Increase Air Temperature
  • Raise the temperature inside the house.
  • Insulate under the seat and over the head of bay, bow, and garden windows to keep the window area warmer.
  • Point warm air supply ducts toward windows and doors or use a fan for increased air circulation.