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  1. #1
    Join Date
    Mar 2013
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    8

    Question Dead air space?

    My bathroom is built under the stairs. Curving stairs are above part of bathroom ceiling, and rising to upstairs hallway.

    In the space where the stairs rise, I suspect there is a small dead air space between the stairs and bathroom ceiling. Over the years paint cracks and peels and black stains appear, just under that space. Sc**** it, fill and paint it, looks great for awhile but after 10 years the problem is back full force.

    If there is a dead air space, I suspect same problem that occurs in uninsulated attics -- moisture is being condensed out the air in winter.

    Has anyone had this problem?

    How did you / how would anyone suggest fixing the paint and stains problem? Do you think I have a space? Any help appreciated.

  2. #2
    Join Date
    Mar 2008
    Location
    nova scotia, canada
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    Default Re: Dead air space?

    the bathroom needs venting.. that will solve the paint issue
    fire up the saw and make some dust

  3. #3
    Join Date
    Mar 2013
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    8

    Cool Re: Dead air space?

    It is vented. That's why I think it's another problem, such as a hidden space.
    The exterior house walls are not insulated.
    My grandfather built this house!

  4. #4
    Join Date
    Mar 2008
    Location
    nova scotia, canada
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    Default Re: Dead air space?

    in that case youll have to open up the ceiling and get some insulation in there. damp air is in the void causing the peeling
    fire up the saw and make some dust

  5. #5
    Join Date
    Mar 2009
    Posts
    238

    Default Re: Dead air space?

    You could most likely fill that void with unfaced fiberglass or other insulation methods. I assume there aren't any pipes or vents going through that location, both of which can be sources of moisture when you factor in condensation. The other potential issue might be the location of the existing ventilation fan. If the fan is right next to the door, it may just be sucking in air from the hallway rather than exhausting the damp air from the bathroom. You may also consider a timed switch for the fan so it can run for a certain amount of time after you leave the room to ensure it properly ventilates.
    My advice and opinions come from hands on knowledge...and This Old House Hidden Content

  6. #6
    Join Date
    Mar 2013
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    8

    Default Re: Dead air space?

    Thanks to everyone!

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