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damp on wall behind toilet cistern

Discussion in 'Plumbing and Central Heating' started by Oskool, 19 Feb 2005.

  1. Oskool

    Oskool

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    I have recently had a new bathroom suite installed by a friend. Pretty much immediately after, I noticed that the wall behind the toilet cistern was getting damp. Mould is now growing on it.

    I have tried sealing the cistern lid with silicone to no avail.

    Does anybody know what is causing this and how I can stop it?

    My friend and I are assuming that it is condensation coming from inside the cistern - what do you think?

    Thanks

    Neil
     
  2. nstreet

    nstreet

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    It probably is condensation but not from inside the cistern. What is your cistern made from?

    Its more than likely because the cistern is full of cold water, when you shower/bath the warm moise air will condense on the back of the cistern, some of this damp may transfer to the wall. This sounds like a place there isn't much airf flow, therefore the mould grows.
     
  3. Oskool

    Oskool

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    Thanks for your reply
    Its made from porcelain.
    How can i stop it? What about tiling the wall the cistern is fitted to?
     
  4. nstreet

    nstreet

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    Yes tiling would stop the mould on the wall problem, but the grout would undoubtedly get mouldy instead. Stoping condensation on porcelain cisterns is a question that has been asked many times, do a search on this forum and you will find them. You could try a thin layer of polystyrene behind the cistern, but you will still get condensate on the cistern itself.
    I dont think there is an easy answer.
     
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