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Green mold on external wall


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Hey, I wanted to ask if anyone's tried using diluted white vinegar instead of bleach?

I've heard it's just as effective and less harsh on stone or brick. Also wondering if your wall gets any sunlight....might explain why the mould keeps coming back.

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Sounds like it could be a mix of damp problems and lack of airflow. I had a similar issue a while back and ended up using Mould Surveys to figure out what was really going on.

They identified moisture coming through cracked pointing I hadn’t even noticed. Once that was sorted, and I used a decent bleach mix to remove the surface stuff, it didn’t come back.

Edited by Hexogon
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