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Flaking Masonry Paint

Discussion in 'Decorating and Painting' started by Awca, 26 Mar 2020.

  1. Awca

    Awca

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    Hello.
    Our back and side walls have been flaking ever since we moved in a few years back. Does anyone have any advice to fix it?

    Is it best to chip away at the loose then just repaint it?

    many help would be kindly apriciated.
    Regards

    Adam

    upload_2020-3-26_21-12-5.jpeg
     
  2. blup

    blup

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    Difficult to tell from the pics.

    Maybe penetrating damp, some sort of water leak (if near the ground), or a dripping gutter.

    You could patch and repaint - if the problem re occurs it will be something more fundamental.

    Blup
     
  3. Awca

    Awca

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    Thanks, does it need to be primed before painting do you think?
    Sorry I’m a bit of a novice
     
  4. bobasd

    bobasd

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    Presuming that your post and pic refer to outside rendered walls?
    The render is cracked and the paint & skim coating of whatever dont seem to have bonded with the render.
    pics showing whole areas of the walls would help?
    Are there any signs of damp penetration inside the walls?
     
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  6. Awca

    Awca

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    These images may not help any more. The room inside is a bathroom and is single skinned, so quite a cold room. don't think a any water is causing damp, doesn't seem to be any links. But it does seem to be damper lower down somehow.
     

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  7. bobasd

    bobasd

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    From what the new pics show the render is compromised in the red area and the white area - how far its compromised you will only discover as the render is removed.
    Typically, the best solution is to remove the render back to masonry and re-render in a 3:1 sand and lime mix - then use a good quality masonry paint.

    Render must stop about 50mm above ground level with a bell cast.

    i assume that "damper lower down" refers to the bathroom?
     
  8. Awca

    Awca

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    Thank you for your help, massively appreciated. The damper lower down was referring to the bottom of the red wall. When we moved in a handyman said he thought it was moisture rising outside or something like that.

    Sorry, not the most knowledgeable as you’ve gathered when it comes to this.
    Adam
     
  9. bobasd

    bobasd

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    It is "moisture rising outside" ie its Rising damp from the render ground contact, and Penetrating damp from rain penetrating thro the cracks and getting into the wall outer skin and the render.

    Damp often crosses cavities where cavities are bridged or blocked or cavity insulation is transmitting the damp.
    You should carefully examine the wall, & the wall floor junction area in the bathroom.
    Look for blistered or stained decorations or plaster.

    How come this matter wasn't raised by any Surveyor on buying the house?
     
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