Can an air brick high on a chimney cause damp ?

11 Oct 2016
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United Kingdom
Hi I have a damp problem on the ground floor height of a chimney breast.
There's an air brick directly above that area on the 1st floor.
Is it possible that rain is driving in and causing the damp ?
Maybe it should have a hood on it ?

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Rising, or flue condensation or a bit of both. The air brick should be lower, the plaster is now hygroscopic
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Thanks mate, what's the remedy for that please ?
Re plaster with special plaster ?
Seal with Thompson's water seal or similar ?

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