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Does This Look Like Rising Damp or Efflorescence?

Postby dave88 » Tue Apr 10, 2018 9:43 pm


Can anyone advise on what this looks like:

It does not feel damp, but the paint keeps drying out and flaking off.
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Simply Build It

Postby Skid Sprocket » Tue Apr 17, 2018 6:20 pm

As the stain does not start at the bottom, at a guess I would say it could be some contamination in or on the plaster surface staining the emulsion paint. Any staining will come through water based paints however many coats you apply. A simple fix could be a coat or two of OIL based undercoat to seal the stain before applying the emulsion finish coat.
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