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Version: 2011.07.01

Condensation

The energy efficient homes being built today are constructed to be more air tight in comparison to homes built even 10 years ago. While they seal in the heat in the winter and the cooling in the summer, they also seal in too much moisture laden air.

When warm, moist interior air comes into contact with cooler surfaces (doors and windows), the moisture condenses. Outside we see this as dew; inside you may see it as a layer of moisture on glass windows and doors. Condensation comes from high humidity within the home combined with low outside temperatures.

Not a Window Problem

Condensation forming on windows does not reflect a problem with the window or the window installation. Condensation forming on windows indicates that you have too much humidity inside the home. When this condition occurs, you need to decrease the amount of humidity in the home.

Removing Humidity​

The following are suggestions for removing the humidity.

Humidifier Operation​

If your home includes a humidifier, closely observe the manufacturer's directions for its use and care (see additional information under Humidifier). Low to moderate settings in winter can maintain desired comfort levels without contributing too much moisture to your home. You may need to experiment to find the correct level for your family's lifestyle. In periods of extreme cold, you may need to turn the humidifier off.

Classic does not install humidifiers and is not responsible for damages due to installation or improper usage of a humidifier.

New Construction​

Some experts have estimated that a typical new home contains 50 gallons of water. Water is part of the lumber, concrete, drywall texture, paint, caulk, and other materials used during the construction of the home. Wet weather during construction adds more. This moisture evaporates into the air as you live in your home, adding to the moisture generated by normal living activities. Over time, this source of moisture may diminish.

Normal Activities​

As you live in your home, your daily lifestyle contributes to the moisture in the air. Cooking, laundry, baths and showers, aquariums, plants, and so on all add water to the air in your home. Likewise, your daily routine can mitigate the amount of moisture in your home and reduce condensation on interior surfaces.

Temperature​

Avoid setting your thermostat at extreme temperatures. Heating your home will cause the materials to dry out faster, generating more moisture into the air; drying the materials out too fast also increases shrinkage cracks and separations.

Ventilation​

Develop the habit of using exhaust fans in bathrooms and over the stove. When weather conditions permit, open windows so fresh air can circulate through your home. Keep the dryer exhaust hose clean and securely connected. See the section on Ventilation for additional information.

Warranty Coverage: See Condensation Standards for coverage details.