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What Can I Do About Window Condensation?

Ice and water are clues that you have an air leak


My house is about five and a half years old. In the last few years
I have noticed that my windows develop ice and water on them, mostly at
or around the lock or where the upper and lower window meet. My windows
are dual-pane. I wipe them down, but that is not enough. Is there
anything I can do to fix this before the moisture ruins my windows?

— Paul, Plymouth, NH


Tom Silva replies: An air leak is causing your condensation problem. Adjust your
window locks so that the sashes seal tightly together. Then have a look at the
weatherstripping to make sure its doing its job. If you don't
have weatherstripping in place, get some right away and your
problem should be solved.


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