Results 1 to 5 of 5
  1. #1
    Join Date
    Aug 2011
    Posts
    2

    Default Wine Cellar Moisture Problem

    I am hoping you can advise me regarding my wine cellar problem. I built my 6'x8' wine cellar last summer. I use a through-the-wall Wine Guardian cooling unit.

    I installed a 6-mil plastic vapor barrier on all warm-side walls(2x6 construction with green board)and over the ceiling joists and sealed all seams. I installed R-30 fiberglass insulation between he ceiling joists and R-19 in walls. I covered the ceiling with non-porous plastic paneling.

    The problem:
    I am getting pools of water on top of my plastic ceiling panels - in between the ceiling vapor barrier/insulation and the panels. I didn't want to put green board in the ceiling for this very reason, so I didn't. I just have the plastic paneling as my ceiling. I am assuming that I created a sealed environment where the moisture from humidity condenses in the ceiling and cannot escape from between the vapor barrier and the plastic paneling.

    Is the plastic paneling the problem?
    If so what would be a better solution for covering the ceiling to hide the insulation if I had to remove the plastic panels?

    I don't want the excess moisture to lead to mold problems.

    What would you recommend I do?

  2. #2
    Join Date
    Jul 2010
    Location
    SoCal
    Posts
    7,760

    Default Re: Wine Cellar Moisture Problem

    1. Try to find the source of the water, and solve it. If you see or smell mold, treat it right away.
    2. Never install green drywall board on a ceilng.
    3. 6mm plastic is for use under slabs. For walls, better use a thin tar paper (aka 60 minute paper).
    4. Try using a dehumidifier. See if it works.

  3. #3
    Join Date
    Aug 2007
    Location
    The Great White North
    Posts
    4,045

    Default Re: Wine Cellar Moisture Problem

    Quote Originally Posted by Don Freda View Post
    I am hoping you can advise me regarding my wine cellar problem. I built my 6'x8' wine cellar last summer. I use a through-the-wall Wine Guardian cooling unit.

    I installed a 6-mil plastic vapor barrier on all warm-side walls(2x6 construction with green board)and over the ceiling joists and sealed all seams. I installed R-30 fiberglass insulation between he ceiling joists and R-19 in walls. I covered the ceiling with non-porous plastic paneling.

    The problem:
    I am getting pools of water on top of my plastic ceiling panels - in between the ceiling vapor barrier/insulation and the panels. I didn't want to put green board in the ceiling for this very reason, so I didn't. I just have the plastic paneling as my ceiling. I am assuming that I created a sealed environment where the moisture from humidity condenses in the ceiling and cannot escape from between the vapor barrier and the plastic paneling.

    Is the plastic paneling the problem?
    If so what would be a better solution for covering the ceiling to hide the insulation if I had to remove the plastic panels?

    I don't want the excess moisture to lead to mold problems.

    What would you recommend I do?
    Sounds like the relative humidty is reaching the dewpoint.

    Do you have the Wine Guardian cooling unit piped with a condensate drain or is it just dripping into the pan? Just dripping into the pan could increase the humidity. The warm side of the cooling unit -- is it increasing the temperature in the adjacent room? If so that could be finding it's way into the ceiling of your conditioned space and causing the condensation. The relative humidty might be too high.
    "" an ounce of perception -- a pound of obscure "
    - Rush

  4. #4
    Join Date
    Aug 2011
    Posts
    2

    Default Re: Wine Cellar Moisture Problem

    Thanks for your help.

    I believe I have a breach in the vapor barrier within the ceiling, especially from the sides where it was difficult to seal with plastic sheathing. I will plan to use spray foam to better seal areas where outside humidity can enter the ceiling. Hopefully this will work.

    Thanks again.

  5. #5
    Join Date
    Nov 2011
    Location
    Charlotte, NC
    Posts
    12

    Default Re: Wine Cellar Moisture Problem

    Good luck, let us know if that works.
    I agree with the above poster, it doesn't necessarily sound like a leak or perhaps the vapor barrier trapping moisture. Sounds like a dewpoint condensation issue, and with a small space even a cheap dehum. should handle it.
    Helping Homeowners understand the Typical Causes and Solutions to Hidden Content issues!

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •