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For Your Home: Window Condensation Tips

Reduce condensation with these tips.

Interior Condensation
Condensation on the interior of windows and doors is caused by warm air coming into contact with the cooler glass.

Because glass surfaces are usually some of the coldest parts of your home, condensation appears on windows first, generally in the form of water droplets or frost on the interior of your window. As interior air becomes drier or as the glass surface becomes warmer, condensation begins to evaporate.

Replacing drafty windows and doors or installing a new roof or siding reduces air infiltration into your home, making it tighter. Because a tighter home retains more humidity, condensation on colder surfaces in the home may occur more frequently after these improvements.

Some ways to reduce air moisture include using a portable dehumidifier or installing a whole-house dehumidifier, covering pots and running kitchen exhaust fans while cooking, leaving the bathroom fan on during and after a shower, and leaving interior doors open to allow good air circulation.

Small exterior wood windows underneath a square wood awning

Pella® Architect Series® Contemporary Wood Casement and Fixed Windows

Exterior Condensation
Exterior condensation generally occurs in the summer months. It is caused by three main conditions: high outdoor humidity, little or no wind, and a clear night sky. It forms in the same way as roomside condensation when the temperature of the glass is cooled and comes into contact with that warm, humid air.

To combat exterior condensation, open window coverings at night to warm up exterior glass. Trim shrubbery near windows or doors to promote air circulation. Raising the temperature setting on your air conditioner may also help.

For more information about addressing condensation and its effect on windows and doors, download the Pella Owner’s Condensation Manual.

This article was written by

Nicolle Picray, Content Marketing & Social Media, Pella Windows & Doors

A self-proclaimed Social Media Geek and DIY aficionado, Nicolle is a member of the Pella Marketing team, focused on content creation and curation. In her free time she can be found pillaging thrift shops for furniture projects, attempting to rationalize with her 4 year old daughter, and editing her husband’s honey-do list.

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