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What causes condensation on windows?
Whenever there is excess humidity in the home, it will manifest itself on the coldest
area of a wall, which is normally the windows. The warmer the air, the more moisture
it will retain, so when it comes in contact with the colder glass surface and the air
is subsequently cooled, moisture is released in the form of condensations.
Do windows cause condensation?
No, condensation on windows is not the fault of the window, unless the window seal
has failed. However, by replacing drafty windows or even installing a new roof, you
are reducing airflow in your home and making it tighter. Tighter homes retain more
humidity.
Can I reduce the condensation on my windows?
Yes. In order to reduce condensation, humidity must be controlled and air movement
must be generated. As the exterior temperature drops, the humidity level needs to
decrease if condensation is to be controlled.
What steps can I take to reduce humidity in my home?
The two main things you can do are to control sources of moisture and increase
ventilation. To decrease or control excess humidity and condensation:
- Use exhaust fans in your kitchen, laundry and bathrooms.
- Vent gas burners, clothes dryers, etc. to the outdoors.
- Shut off furnace humidifiers and other humidifying devices in your home.
- Be sure that louvers in your attic or basement crawl spaces are open and amply sized.
- Open fireplace dampers to allow an escape route for moisture-laden air.
- Air out your house a few minutes each day.
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