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Condensation on windows

Posted by JK on August 24th, 1998 08:44 PM

2 of 2 people found this post helpful

We have a all brick ranch house with a full basement in Northwest Indiana. Our old single pane windows used to frost and get lots of condensation in the winter. In August 1997, we replaced the windows with Great Lakes Thermo pane windows. However, last winter the windows got condesation but no frost. These were expensive windows that were supposed to get rid of the problem. I don't believe there is insulation between the plaster walls and the brick. The house is 30-35 years old. We do not have a humidifier hooked up to our 80% efficient Comfortmaker gas furnace. We also run a dehumidifier all year.

The window man said it is good that the windows get condensation because it means the windows are air tight and the house is not too dry.

A HVAC tech said that the brick is maintaining moisture and is being sucked into the warm air of the house. He suggested that I seal the brick with Thompson's Water Seal. Is this a good idea?

Does anybody have any ideas of what we can do to eliminate the problem? Other houses in our neighborhood with new windows do not seem to have this condensation problem.

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