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Exterior Paint Blistering

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  • 15-04-2018 1:01pm
    #1
    parishsavings
    Closed Accounts Posts: 165 ✭✭


    Hi, my exterior paint is blistering and bubbling in places.
    I am guessing this is either damp or oil based paint reacting with the plaster.

    I understand there is something available that can be painted onto the plaster first to seal it against reacting with the paint??

    One of the problems I have is that where the paint has blistered there is no longer a smooth skin on the plaster, instead it has exposed a grainy surface underneath, trying to upload a photo to show what I mean!


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    #2
    parishsavings
    Closed Accounts Posts: 165 ✭✭parishsavings


    Pic attached


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    #3
    martinr5232
    Registered Users Posts: 2,298 ✭✭✭martinr5232


    parishsavings wrote:
    Hi, my exterior paint is blistering and bubbling in places. I am guessing this is either damp or oil based paint reacting with the plaster.


    Had that with my house when it drys out it will start peeling.
    I ended up powerwashing the whole thing then painting it with stabalising primer finally two coats of good quality emulsion.

    That was seven years ago its still as good as the day i done it.


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    #4
    dodzy
    Registered Users Posts: 9,927 ✭✭✭dodzy


    parishsavings wrote: »
    Pic attached

    Can’t see any blistering in that pic, only where you removed previous coating back to the surface, and where you didn’t. As above post suggests, always use this or similar when repainting old surfaces. I find the truguard excellent.

    http://www.leylandtrade.com/products/product-detail/truguard-stabilising-masonry-primer.aspx


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    #5
    martinr5232
    Registered Users Posts: 2,298 ✭✭✭martinr5232


    Thats the stuff i used it works well not one bit of flaking.
    True saying if a jobs worth doing its worth doing right.


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    #6
    parishsavings
    Closed Accounts Posts: 165 ✭✭parishsavings


    Great stuff, thanks for the advice. The photo shows a patch were a bloster had formed and when i removed it this was what i was left with.

    Will the primer seal it all up / create a skin for me?!


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    #7
    dodzy
    Registered Users Posts: 9,927 ✭✭✭dodzy


    parishsavings wrote: »
    Great stuff, thanks for the advice. The photo shows a patch were a bloster had formed and when i removed it this was what i was left with.

    Will the primer seal it all up / create a skin for me?!
    Yes


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    #8
    parishsavings
    Closed Accounts Posts: 165 ✭✭parishsavings


    Brillant. Thanks a million for all the advice.


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    #9
    coxy123
    Registered Users Posts: 433 ✭✭coxy123


    Apologies for re-starting an old thread - I can't see any attached picture but I think I may have similar issue to OP in that paint at plinth at front of house is blistering - see pic. Recommendation to use trugard as mentioned? Thinking of repainting exterior of house this Spring when weather picks up and I get the time to do it :) . Thanks

    20220128_084050[1].jpg




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    #10
    Deregos.
    Registered Users Posts: 582 ✭✭✭Deregos.


    https://www.boards.ie/discussion/comment/118630788#Comment_118630788

    Good scape down & powerhose, then neutralise any efflorescence affected areas with diluted vinegar for a day or two, powerhose again, let dry and paint a couple of coats of something like this on before painting with exterior emulsion.

    https://www.duluxtradepaintexpert.co.uk/en/products/dulux-trade-alkali-resisting-primer



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