10:42PM | 01/07/14
I have to run a humidifier at night in my bedroom because of my asthma. I am noticing that of the two windows in that room, only one has condensation and ice due to the frigid temperatures we have had lately. Its always colder in that room than the rest of the house. The humidifier is kept on the far side of the room away from the two windows. I read online that the humidity can cause the ice and condensation on the glass. It's also not forming between the panes, just on the inside. So if it's just from the humidifier, how come only one of the windows does it and the other one that's 4 feet to the left of it doesn't? That said, what else could be causing this given that it's so cold in there compared to the other rooms in the house. The windows are not even a year old, they were put in in the spring of 2013. Where it's a double hung window, it's happening on the bottoms of each section.


10:06PM | 01/13/14
There could be other factors -- does the one with condensation face North? Is the one without condensation nearer to a heat duct? Are your windows covered with blinds or shades most of the time? If so, try opening them - even at night. Also try a space heater -- the oil filled/radiant heat kind -- not the electric/fan or kerosene kind (too dangerous).

Andersen Windows has an excellent video about condensation:


10:17AM | 01/14/14
Member Since: 01/14/14
85 lifetime posts
It can also be because that window has an air leak.
If not one took the time to use caulking behind the nailing fins on the outside, window tape was not used to seal the fins, low expanding foam was not used to fill any gaps between the window jambs and the rough framing.
Caulking was not use around the window frame ECT.
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