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    Should I use Fungicidal wash for the external house walls?

    Painters & Decorators

    My house has had intermittent problems with mould in the past years and recently we have been planning to repaint the outside of the house. A friend has suggested using a fungicidal wash before repainting the house to get rid of any remaining mould there may be.
    I know this can be quite strong stuff, so I am hesitant to use it if it’s not required.
    Has anyone had any experience of using a fungicidal wash on the external walls of houses?
    Additionally, any specific brands or other suggestions would be appreciated.

    Asked by MRS DAKIRI on 14th Nov 2019
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    Best Answer

    Au Faix

    "Yes that’s fine to use. Or you could just use disinfectant"

    Answered on 6th May 2021 - Member since Apr 2021 - report
    O&O Quality group ltd

    "Yes, you can wash the walls with that then white wash the walls with anti mould paint before you apply your main colour paint."

    Answered on 5th Dec 2019 - Member since Nov 2019 - report

    "Yes, I have used a similar sort of product when painting the roof tiles of a house, unfortunately, like they say your painting is only as good as your prep so if you want it to last I suggest using it but taking the right health and safety precautions."

    Answered on 14th Nov 2019 - Member since Aug 2019 - report
    Verdi Services

    "The short answer is yes.
    You should use the fungicide as per directions, which usually say to allow it to dry overnight, rinse down the following day and allow to dry again overnight before proceeding.
    Depending on the surface you are left with, you might also need to consider a subsequent application of stabiliser prior to painting.
    But it’s not really the best time of year to be considering painting the exterior of a property.

    Sandtex does the required products."

    Answered on 14th Nov 2019 - Member since Nov 2018 - report
    C Turners Property Services

    "Hi, yes you need to use a fungus killer on the area that you see growth. The area needs to be treated prior to painting. Failing to do so will ruin the paintwork as the mould will eat its way through in no time. You can get a quick dry one and they don't cost a lot."

    Answered on 14th Nov 2019 - Member since Mar 2019 - report
    M&W Decorating

    "Washing walls with fungi wash use hand gloves and eye protection wash off afterwards when dry."

    Answered on 11th Feb 2022 - Member since Jul 2020 - report

    "The fungal wash will get rid of it but it may come back in time if there are trees close by."

    Answered on 14th Nov 2019 - Member since Jan 2018 - report
    T@P decorating

    "You can use fungicide wash but use a primer before your main colour"

    Answered on 20th Apr 2021 - Member since Mar 2021 - report
    Exterior House Painters - West Midlands

    "Yes it works.

    Pick the areas you need to wash, thin the fungicide down with water.

    Wire brush the areas affected.

    Then you are good to go with a decent exterior masonry paint. Don't go cheap."

    Answered on 17th Apr 2020 - Member since Dec 2019 - report

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