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What paint for bathroom ceiling with mould?

Discussion in 'Decorating and Painting' started by OM2, 31 May 2019.

  1. OM2

    OM2

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    We've got black specs in one corner of our bathroom.

    We've got an extractor, but have still got the problem.

    What paint do I need to cover?
    Is there any treatment I should apply before the paint?

    Thanks.
     
  2. jonbey

    jonbey

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    I've never used it, but I'd get something like this https://www.toolstation.com/ronseal-6-year-anti-mould-paint-25l/p86512

    If you can get to the loft, assuming there is one, then try to get more insulation above the bathroom. And maybe replace the extractor fan.

    I had mould on ceiling in my bungalow (solid walls, poor insulation) but since piling loads more insulation up there the mould on the ceiling has stopped. Still grows in other areas. I have a heater in the bathroom, wall mounted near the ceiling, which really helps get the moisture out in winter after a shower.
     
  3. JohnD

    JohnD

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    Yes, you need a better extractor, or to turn it on more often.

    Show us some photos please
     
  4. OchAye

    OchAye

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    You must clean the old mould and kill the spores (specialist products of bleach). Rinse afterwards. Do not paint over mould.
     
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  5. Dork Lard

    Dork Lard

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    I've just recently & successfully solved your problem at great cost, both in time & money, to myself.

    Kill the spores with a solution of 50/50 bleach & water, or for £1 a bottle "Astonish Mould & Mildew Blaster". Then paint it with a Zinsser anti-mould paint.

    Most of my life has been devoted to finding this solution.
     
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  6. scbk

    scbk

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  7. OM2

    OM2

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    Thanks for the replies guys.
    So I need 'Astonish Mould & Mildew Blaster' - and NOT to use bleach?

    See below for a pic of the problem

    [​IMG]

    QUESTION: after applying anti mould 'stuff' how long should i wait before painting?

    ALSO: is there a cheaper alternative to the Ronseal paint? I looked in screwfix, I find 'Primer Sealers'.
    The reason why I ask is... when we had the painting done, the 'proper' paints would have been used by the painter... but we got the mould start coming back after say 1 year...
    So... if it's a case of using anti mould spray + white paint, I'm happy to do once a year (not that I actually want to - would prefer to paint once and forget about for 10 years).

    Let me know.
     
  8. bourbon

    bourbon

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    Try moving your extractor to directly above your shower. I found that extractors 'drag' the moisture across the ceiling.
     
  9. OM2

    OM2

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    @bourbon it's actually literally above the shower head!
    The extractor is a pain... we turn on the light... and it turns on after 10 seconds.
    Then only goes off 1-2 min after the light has gone off.
    Given that we have a mould problem, this setting should stay?
     
  10. JohnD

    JohnD

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    Of your fan.

    It is very likely that we can suggest one that actually works.
     
  11. bourbon

    bourbon

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    needs to be on longer than that. Some are adjustable Turn it up
     
  12. jonbey

    jonbey

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    If the ceiling is cold, an extractor fan won't get the moisture out the air before it condenses in the corners.
    Insulation + heat with extraction.
     
  13. OchAye

    OchAye

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    Cold showers. Problem solved.
     
  14. cwhaley

    cwhaley

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    I bought an extractor with the ability to shift 280 litres of a water an hour and still had condensation and small amounts of mould, albeit much worse than when we had the small "inline" extractor by Manrose. So it is possible that a stronger extractor fan is not your answer.

    First of all check to make sure the fan and the ducting are set up correctly to extract air from the room and also make sure there is a small gap (8-10mm) underneath the bathroom door to allow fresh replacement air to be brought in.

    I cleaned my walls down (get rid of the existing mold!) and painted with an anti-mold paint. Now when we've had a shower yes we get some condensation on the walls but I have not had mold in over 2 years.

    It must be said that while we have a shower with the fan on, we do switch off and fling the window open for an hour or two when done. I personally think this is the best way to ventilate post-shower rather than having a fan on an overrun.
     
  15. jonbey

    jonbey

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    yep, that's why I said insulation + heat. That works. If there are cold spots and the water condenses quickly, and extractor fan can't get it out of the air, you need to wait for the ceiling to dry out and evaporate.
     
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