Condensation problem or Insulation issue in window sill?

Old 02-23-15, 04:18 PM
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Condensation problem or Insulation issue in window sill?

We had our first snow in Dallas Texas today.. By upstairs window, I have this condensation inside the window. And, have some water puddle on the window sill.

The room is a little cold than rest of the house. And, I am wondering if this is something an insulation problem or just caused by the drop in temperature.

Attached are two pictures of the condensation..
Old 02-23-15, 04:34 PM
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Warm moist air in the home condensing on the cold glass. A dehumidifier will solve the issue.
Old 02-23-15, 04:37 PM
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That's what happens when you have an aluminum window frame, your humidity is too high inside, and the temperature outside is cold enough. It's possible that cold air is coming under the window, so you might need to caulk the perimeter of the window inside and out... but you certainly can't do that when it's wet.

Check to see if the window is locked... If it's a single hung or double hung window you could open it just a crack and see if the bottom of the sash is straight with the frame. If the window is a little bit out of square or if the sill is bowed up, the window may not be sealing completely when it's closed.

Keep it wiped up and pray it warms up.
Old 02-23-15, 04:40 PM
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thanks for reply.. Is caulking a fairly straight forward process? Is there a guide or video that I can go thru to do this correctly? Specially, concerned that I might not complete the process correctly and will have to again hire somebody to get it done properly.
Old 02-24-15, 04:28 AM
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More than likely, as has been mentioned, just an issue of water vapor condensing on the aluminum frame of the window or the glass itself. Caulking won't help either of those issues. For the brief period that your temperatures will be cold I would just wipe it up when it occurs. Chances are it is not going to be of any duration and won't really cause any major issues. You could check the relative humidity in the house and act to reduce the condensation by lowering it or raising the room temperature.

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