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understanding condensation

Screen Shot 2023-08-21 at 3.18.44 PM.png
Screen Shot 2023-08-21 at 3.18.44 PM.png

Condensation occurs when warm, moisture-laden air comes in contact with a cold surface. The cold surface causes the moisture in the air to condense upon it. This occurrence typically becomes most noticeable during the autumn and winter months as outside temperatures become cold. Moisture will appear on the relatively cooler surfaces inside the home, including but not limited to door, window and glass.

The following are some of the contributing factors to moisture levels in a home / building:

  • Washing and drying clothes, cooking and bathing add to humidity levels.


  • Extreme drops in outside temperatures can cause temporary condensation problems.


  • Curtains and drapes can block air flow near windows and doors. Adequate airflow helps remove moisture from glass surface.


  • Building materials used in new construction, such as lumber, paint and plaster, release moisture as they dry. They raise the humidity level temporarily, which becomes noticeable the first time the heat is turned on. New building materials will dry and are not usually a factor after the first heating season.


  • Steps to increase the air-tightness of your home almost always raise humidity levels bc of the reduced air exchange between indoors and outdoors.


  • Plants and flowers require water and release moisture.



Controlling condensation is a matter of reducing the moisture inside your home. 

The most effective way to reduce condensation is to provide adequate ventilation so that humid air can be exchanged for drier outside air. Using exhaust fans when cooking or bathing and allowing fresh air into your home will help reduce moisture levels.

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