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sweating indian limestone porch floor in south carolina

jakohn21955886jakohn21955886 Posts: 1
in Problem solving
we have  a new house  installed a beautiful indian limestone floor on our covered, screened porch.  during the colder months whenever the weather warms the porch floor sweats and stays wet until the weather gets colder .  we are unable to use our porch even though we have heaters and a fireplace because the floor is soooo wet.  the warm air is condensing on the cold stone.  the builder did put down a vapor barrier (plastic) before setting the stone in mortar and sealed the stone.  he has since unsealed the stone to help with all the condensation but it has not helped at all. what do we need to do to prevent this from happening

Posts

  • Busy-LizzieBusy-Lizzie Posts: 24,043
    This happened to my tiled veranda in SW France, but just sometimes, depending on the weather. I used to mop it. It couldn't have been ventilation because the veranda was open sided, except where it joined the house. There were greater fluctuations in temperature there than in the UK. You may not get an answer as this is a UK site.
    Dordogne and Norfolk. Clay in Dordogne, sandy in Norfolk.
  • Pete.8Pete.8 Posts: 11,340
    Anytime warm, humid air hits something much cooler it will form condensation, much like it does on windows.

    I did come across this thread which indicates the same problem, but doesn't really offer a solution-

    https://www.hometalk.com/diy/outdoor/q-i-have-a-screened-in-porch-and-the-floor-is-cement-but-it-sweats-when-it-rains-what-147369

    I'm not sure why your post has been flagged as spam???? but welcome to the forum and I hope you can find an answer somewhere.

    Billericay - Essex

    Knowledge is knowing that a tomato is a fruit.
    Wisdom is not putting it in a fruit salad.
  • raisingirlraisingirl Posts: 7,093
    Your only option really is to get some heat onto the floor - some kind of radiant heater in the ceiling of the porch which 'shines' on the floor so the surface gets warm. Expensive though
    Gardening on the edge of Exmoor, in Devon

    “It's still magic even if you know how it's done.” 
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