Black spores on dot n dabs

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Harveys dad

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I’ve done a load of dot n dab boarding in an old property I’m doing up .Regrettably it’s been a couple of months since I did it and due to illness it’s not been skimmed yet ( I’m not doing that ) .The property has no heating of any kind and I’ve now got black spores or mould showing up where the dabs are both on some internal and external walls . What can I use to get it off I presume it’s just the lack of any heating that caused it or is it likely to be something else, thanks
 
I’ve done a load of dot n dab boarding in an old property I’m doing up .Regrettably it’s been a couple of months since I did it and due to illness it’s not been skimmed yet ( I’m not doing that ) .The property has no heating of any kind and I’ve now got black spores or mould showing up where the dabs are both on some internal and external walls . What can I use to get it off I presume it’s just the lack of any heating that caused it or is it likely to be something else, thanks
You've caspered yourself.

Presume nothing and call a professional like @JessThePlasterer or @John j
 
I’ve done a load of dot n dab boarding in an old property I’m doing up .Regrettably it’s been a couple of months since I did it and due to illness it’s not been skimmed yet ( I’m not doing that ) .The property has no heating of any kind and I’ve now got black spores or mould showing up where the dabs are both on some internal and external walls . What can I use to get it off I presume it’s just the lack of any heating that caused it or is it likely to be something else, thanks
Cold striking from wall to back of dab
To board face

your welcome
 
No landscaping work this time of year??
funny you should say that mate
Got these to do

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your welcome
 
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