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White Powder on bedroom walls and ceiling PHOTOS

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  • 21-06-2012 7:34pm
    #1
    keith4594
    Registered Users Posts: 34 ✭


    its the corner boxer bedroom on the front of the house is red brickwork and on the side i think its hollow block because we went to get the house cavity pumped with foam but the said it couldnt be done.

    Recently this white powder has been showing up on the wall facing the outside of the house (gable wall) and on the ceiling of the bedroom.
    It wipes of an cleans up with a damp cloth but will appear back in seconds after drying out.

    Anyone have any ideas what it is ,how to stop it or even if you have had it before ??

    Photos down below
    Tagged:


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    #2
    kneemos
    Registered Users Posts: 20,412 ✭✭✭✭kneemos


    Could it be mildew.Is it a cold room.


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    #3
    keith4594
    Registered Users Posts: 34 ✭keith4594


    kneemos wrote: »
    Could it be mildew.Is it a cold room.

    The room doesn't seem to be cold although the wall can feel a bit damp ??


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    #4
    BryanF
    Moderators, Home & Garden Moderators Posts: 10,140 Mod ✭✭✭✭BryanF


    do you ever have condensation on you windows? is this particular to certain rooms?
    of the top of my head it may be a combination of efflorescence and mould caused by a cold internal surface (lack of insulation, external would be better than internal) and lack of ventilation (to reduce the humidity)

    its been a damp reasonably mild summer so perhaps this has added to the problem..


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    #5
    keith4594
    Registered Users Posts: 34 ✭keith4594


    BryanF wrote: »
    do you ever have condensation on you windows? is this particular to certain rooms?
    of the top of my head it may be a combination of efflorescence and mould caused by a cold internal surface (lack of insulation, external would be better than internal) and lack of ventilation (to reduce the humidity)

    its been a damp reasonably mild summer so perhaps this has added to the problem..

    No condensation and it's only in this room I had taught it was cold surface meeting a warm surface sort of causing mold external I think is the best option but it's quite expensive


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    #6
    kneemos
    Registered Users Posts: 20,412 ✭✭✭✭kneemos


    You could try a dehumidifier for a spell.Also make sure the windows are left open,good air circulation can make a huge difference.


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    #7
    Maudi
    Registered Users Posts: 1,516 ✭✭✭Maudi


    kneemos wrote: »
    You could try a dehumidifier for a spell.Also make sure the windows are left open,good air circulation can make a huge difference.
    seems like effervesense seeping out..were the walls painted quiet soon after the room was skimmed?


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    #8
    muffler
    Registered Users Posts: 45,870 ✭✭✭✭muffler


    Where is the first pic?

    Is it long since the walls have been painted?


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    #9
    keith4594
    Registered Users Posts: 34 ✭keith4594


    Maudi wrote: »
    seems like effervesense seeping out..were the walls painted quiet soon after the room was skimmed?

    no the walls were wallpapered until about 1 1/2 years ago then they were painted .
    muffler wrote: »
    Where is the first pic?

    Is it long since the walls have been painted?

    1 1/2 year ago


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    #10
    muffler
    Registered Users Posts: 45,870 ✭✭✭✭muffler


    Thanks Keith. Which room and which part of the room in pic 1 is affected?


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    #11
    keith4594
    Registered Users Posts: 34 ✭keith4594


    muffler wrote: »
    Thanks Keith. Which room and which part of the room in pic 1 is affected?

    p1 is the same room as picture 2 its only in the boxer room in the top left hand of the house
    the front is block work and the side is hollow block the
    painted blue plaster board is the hollow block wall.
    but the wall on the block work also feels damp but no white powder


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    #12
    kneemos
    Registered Users Posts: 20,412 ✭✭✭✭kneemos


    Would pvc painted on the outside stop the moisture from entering.Have you checked behind the curtains op,they tend to hold moisture.


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    #13
    muffler
    Registered Users Posts: 45,870 ✭✭✭✭muffler


    keith4594 wrote: »
    on the side i think its hollow block because we went to get the house cavity pumped with foam but the said it couldnt be done.
    keith4594 wrote: »
    and the side is hollow block the
    painted blue plaster board is the hollow block wall.
    I think that is possibly your problem - hollow block wall. I seen similar situations before and what appears to be happening is the dampness/moisture is traveling across the wall very slowly and is being dried on the inside leaving an effervescence like coating on the wall.

    There are various sealers that can be applied but you really need someone to have a look at it to decide what's best.


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