condensation on coop windows

Discussion in 'Coop & Run - Design, Construction, & Maintenance' started by mstricer, Dec 15, 2009.

  1. mstricer

    mstricer Overrun With Chickens

    Feb 12, 2009
    This is my first winter having chickens, My coop is insulated and has two windows, one window, we covered with plexi glass (which can be taken off in summer) and it has a shutter. The other one has a shutter, but no plexi glass, for ventilation. we have a roof vent also. The window with the plexi glass has condensation on it. Is it due to their breathing? The pic on left is the one that is now covered with plexi glass. The one on the right has a shutter that comes down. Do I have enough ventilation?
    [​IMG] [​IMG]
  2. LynneP

    LynneP Chillin' With My Peeps

    Is the condensation a light film, like you'd get if you breathed on the window, or a soaking good runoff? Does it happen only on damp days or all the time?
    Plexiglass tends to fog up a bit more easily than glass, especially if only one layer and we have a window like that in the coop that gets a bit of fog or frost on very cold days.
    If you think it is excessive or if you have seen mold, you probably need a bit more ventilation, high up in the coop.

    Also, check for little leaks that might be letting in damp air around the plexiglass or the shutter- it could be that simple. [​IMG]
    Last edited: Dec 15, 2009
  3. mstricer

    mstricer Overrun With Chickens

    Feb 12, 2009
    I've been noticing when I let them out proprobaly them breathing on it all night.
  4. patandchickens

    patandchickens Flock Mistress

    Apr 20, 2007
    Ontario, Canada
    What is the temperature difference between indoor and outdoor; and is the condensation *only* on the windows, or is it also elsewhere.

    If there is "enough" (sorry, can't define it more precisely [​IMG]) temperature difference between indoor and outdoor, you can have totally-acceptable humidity indoors and yet still have annoying-but-unavoidable-and-fairly-harmless condensation on windows. Just b/c the windowpanes get so cold. To some degree you can diminish this by putting plastic film or bubblewrap over the windows, but even then, with a large temperature difference it can happen. There is only so much you can fight physics [​IMG]

    If there is condensation elsewhere, or *lotsa* condensation on the windows, or the coop feels clammy or smells ammonia-y, or if you put a PROPERLY CALIBRATED hygrometer (i.e. use the salt method to calculate correction factor, don't trust what it literally reads) in there and it says you have humidities over 75% or so, then you DO need more ventilation (or heat, or a different climate... but *usually* ventilation will do it)

    Good luck, have fun,

  5. gsim

    gsim Chillin' With My Peeps

    Jun 18, 2009
    East Tennessee
    How often do you get rid of the poop? It contains moisture and contributes to humidity equally to breathing if not more. I have poop planks and scrape them daily first thing in AM BEFORE feeding. [​IMG] I also throw open 2 of the 4 windows and allow a COMPLETE air change out. Only then do I fill feed trough. I usually do not close windows until afternoon, and may leave partly open depending on temp. How many sq ft of full-time ventilation do you have exclusive of windows/doors?

    I have around 6 sq ft for 24 chooks. All of it is above the 8 ft height of the coop. Windows is how I control it allowing for both seasons and expected overnight temps. Hope that helps. A little fog now and then, no big deal. Drops of sweat, big deal and major health concern. [​IMG]

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