Condensation on window

Post in 'DIY and General non-hearth advice' started by burnt03, Dec 9, 2012.

  1. burnt03

    burnt03
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    Burning Hunk

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    First winter heating with the stove. Have one window upstairs that hasn't been replaced (circa 1980), located about as far away from the stove as possible (upstairs on other side of house).

    Getting quote a bit of condensation forming on it. Humidity in house is about 40%.

    Anything I can do with it? Would putting plastic over the window frame (getting an air space between window and plastic) help?
     
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  2. StihlHead

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    I have similar problems here with a metal/glass door at the far side of the house. Metal gets cold so the double pane window gets cold on the inside of the house and collects water all the time. Anything to keep it warmer from the outside or keep water off from the inside will help. Plastic will help on either side, but moisture may also collect on the warm side of the plastic (in both cases). I may replace the metal door with a wood one to keep the glass warmer. It is in a mud room with a tile floor though, so potential water damage is minimal.
     
  3. Backwoods Savage

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    I'd definitely put plastic on the outside and probably the inside. However, if you put it on the inside, watch it closely and if still excessive moisture I'd then remove the inside so you can dry it every so often.
     
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  4. woodgeek

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    40% doesn't sound that high. It would def help.
     
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  5. nate379

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    Depending on outside temp 40% can be quite high.


    Outdoor Temp Indoor Humidity​
    -20* 15%​
    -10* 20%​
    0* 25%​
    10* 30%​
    20* 35%​
    Over 20* 40%​
     
  6. burnt03

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    If those temps are fahrenheit, we're at around freezing right now (32 F) so I guess I'm ok there.
     
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  7. EatenByLimestone

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    The glass is just cold enough so that the air next to it can't hold the same humidity as the rest of the room/house. Plastic would help a lot. So might a storm window.

    Matt
     
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  8. nate379

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    Yes, temp is *F.

    I got that info from some college study I had found a few years back. I don't remember the whole reasoning behind it, but I do know that it helped in my house with my windows sweating. Seems to be more of an issue with a tight house... air isn't flowing through I guess?

    I know the leaky as heck windows we have at work don't sweat at all. They are back enough that it's freezing if sitting near a window.





     
  9. gzecc

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    Is this a double insulated glass unit?
     
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  10. burnt03

    burnt03
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    Burning Hunk

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    I'm not sure but I don't think so. The rest of the windows upstairs are newer (repl 2003) and I'm guessing they're the new type. Still get a little bit of condensation on them if I close the blinds over top (especially the blackout blinds) but for the most part, they're pretty good.
     
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