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Should there be ice/frost on the inside of my windows?

I woke up to very cold temperatures (outside) this morning and found frost/ice build-up on the INSIDE of my windows. Is this normal? If so, what can I do to help prevent this?

Building Supplies
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1 Answer from this member:
Lyle W
If the windows are older single pane glass rather than the modern double pane glass, then the frost on the inside glass is likely normal. During colder weather, the temperature of the glass in the windows can go below freezing and the moist air indoors will form the frost. This is less likely if you have double pane windows since they insulate the inner pane of glass from the outer one better.

If you do have the older single pane glass windows, you may consider replacing them with a modern double pane glass that would likely prevent this problem. If you are using a humidifier for the winter, you may try reducing the setting slightly to see if you can prevent this problem.
by Lyle W Earned 10,866 community points in Building Supplies
December 10th, 2009
Answered in 3 hours
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