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Replastered Kitchen Damp Patching Appearing

Postby johnson_briggs » Fri Mar 27, 2020 5:25 pm

We have recently had the kitchen re-plastered. After drying out we noticed these patches after it had rained. These then dried out but several days later a few marks reappeared on a dry day.

Before replastering, the plaster was quite bobbly and had come away from the wall hence why it was re-plastered.

Can anyone advise if this is due to damp? The wall is an external wall though there are no obvious holes or pointing issues on the other side.

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Simply Build It

Postby stoneyboy » Sun Mar 29, 2020 10:19 pm

These look very much like soot stains coming through from an old chimney.
If your outside wall is single skin you need to do something to correct this.if it's a cavity wall, dry lining and replastering will sort the problem.
Regards S.
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