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What is the cause of this damp and green dusty mould?

Posted: Thu May 06, 2021 12:59 am
by Stuarty77
This rear wall is damp, with a vertical 'tide mark' of this green dusty mould. What is the cause?
There was also moisture on the wall itself
Thanks

Re: What is the cause of this damp and green dusty mould?

Posted: Fri May 07, 2021 10:16 pm
by stoneyboy
Hi stuarty77
If you are referring to the dark strip next to the door frame then this may be as a result of replacement doors being fitted too far forward in the outer brickwork skin.
Regards S