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Thread: Wall plastering

  1. #16
    Bmiricle's Avatar
    Bmiricle is offline Established Member
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    Re: Wall plastering

    You need to drop the temperature of your walls as opposed to the temperature outside and inside. To be honest I don't really know the equation for that but circulation should help. It's a matter of getting the air moving and chilling the walls a bit. I think there's a 3 degree buffer one way or another.

    If you've purchased a de-humidifier you should be ok.
    ~Politicians are just a group of lawyers over complicating life for everyone else.

    ~Political correctness is tyranny with manners.
    - Charlton Heston (1924-)

  2. #17
    miguel_gomez's Avatar
    miguel_gomez is offline Established Member
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    Re: Wall plastering

    It's actually the roof, not the walls, that experiences problems with condensation. This problem appears because of the cement that dried up with the window closed and nowhere to ventilate the outside. You suggest opening the windows even at these temperatures would help? I wouldn't see why not, but I want to be sure that this would not get more humidity in instead. It's a little humid outside and the temperature is nearing 3 deg C.

  3. #18
    nivek's Avatar
    nivek is offline Moderator
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    Re: Wall plastering

    As others have said, opening the windows a crack will help with air flow and reduce the condensation; once the plaster has dried there will naturally be less moisture in the room. It does sound like you have a ventilation problem though.
    Those who are too smart to engage in politics are punished by being governed by those who are dumber. ~Plato

  4. #19
    nivek's Avatar
    nivek is offline Moderator
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    Re: Wall plastering

    If it helps, I also write information about the apartment building. It's an old flat built by Ceausescu in the 1970s in Communist Romania, made of pure concrete. There's no exterior isolation on my level and neither any on the roof (although I plan to install it later on myself).
    Miguel, I just re-read this part of your OP, and it seems to me that this is a key to your problem. It sounds as though your roof is a flat concrete raft type construction, with no insulation, condensation occurs when warm air meets a cold surface, so it appears that your ceiling is the cold surface, this will be sucking in the heat from the room and causing the condensation, you could go a long way to solving this by over-boarding your ceiling with a foil backed plasterboard.
    Those who are too smart to engage in politics are punished by being governed by those who are dumber. ~Plato


 
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