The boiler condensate might be contributing to the damp a but, but I reckon most will be runoff from whatever that brick thing on the right is - unflashed, unguttered sloping concrete "roof" without even a drip ledge.
Boilers don’t produce that much condensate in reality.
@konastab01 started
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The boiler condensate might be contributing to the damp a but, but I reckon most will be runoff from whatever that brick thing on the right is - unflashed, unguttered sloping concrete "roof" without even a drip ledge.