FAQ Knowledge Articles

During cold winters, there is a large temperature difference between the interior and exterior of your home. When the temperature drops outdoors, the glass on your windows tend to have a lower surface temperature than other surfaces in your home. It is the first place that you’ll notice condensation. This is not due to any defect in your window or door, it is a sign of needing to reduce the humidity in your home.
If condensation is a chronic occurrence in your home, chances are that you have excessive humidity. If water is accumulating on glass, chances are it is accumulating on other harder-to-see surfaces such as wall and roof cavities. If left uncontrolled, excess moisture can have serious consequences, including:
• Mold or mildew            • Damp, ineffective insulation
• Warping                          • Discolored or blistered paint
• Roof ice build-up          • Moisture inside walls and attic
Excessive interior humidity is more likely to occur in newer or recently-remodeled homes with tight, energy efficient construction, causing a build up of moisture to the interior. Information on excessive humidity and how to reduce condensation on your windows can be found on the internet by searching for “window condensation”.
Learn more about Energy Efficiency and options from Marvin. If you have further questions, please contact your local Marvin dealer.

For more information, see:

Care and maintenance
What is the best way to clean the glass on my windows and doors?
Owner's Manuals

Contact your local Marvin dealer for more information (including asking about information in Marvin's glass information training resources).  For additional support, please call 1-800-533-6898.