Basement windows have condensation after insulating and drywalling basement. Why?

Haven’t had any water issues with basement but now there is condensation on windows and window sills after insulation and drywalling walls 

8 Answers

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  • 4 weeks ago

    Top rated wooden products from https://handyman.guide/

  • 2 months ago

    There is a lot of water in drywall paste/filler/plaster. Also in paint. 

  • 2 months ago

    Are you running a clothes dryer that is not well vented to the outside.  Get a Heating and AC guy and have him check it all out.  He can probably install a dehumidifier for you.  Your insulation sealed things up very well.  Next you will get black mold BEHIND the walls and in the ceiling.  Get Heating and AC guy  right now.

  • 2 months ago

    now the window is the coldest area ..warm air and cold create condensation ..to stop you must ventilate ..

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  • Anonymous
    2 months ago

    vent the dryer better . 

  • GA41
    Lv 7
    2 months ago

    Condensation is caused by warm moist air impinging against a cold window.  When the warm air gets colder next to the cold window, the colder air can't hold as much moisture, so the moisture condenses on the window.  It is probable that the insulation and drywall have made the room warmer.  So the difference between the warm air inside and the cold air outside is more pronounced.  When the room wasn't insulated, the temperature inside approached the outside temperature, so there wasn't much temperature difference at the glass interface.  Now there is a greater temperature difference, with warmer air inside.

    One solution is to put a dehumidifier in the basement to remove some of the moisture from the warm room.  Running the air conditioner also has a dehumidifying effect.

  • Anonymous
    2 months ago

    Moisture in the room, in contact with very cold surface produces condensation. Maybe you need to reduce the amount, or provide better ventilation/use a dehumidifier.

  • Barry
    Lv 6
    2 months ago

    Insufficient ventilation. Were the dry walls skimmed with plaster? If so it's still drying out.

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