damp patches on the inner wall of my outhouse...
In my opinion that arrangement looks decidedly dodgy, I would have thought the timber joists would at least sit on the block work rather than a timber beam screwed to the walls and very near to the top course where there will be little support. I would also have a look at that drainage channel it might be a source of damp getting inside. It will be interesting to see what the local BCO says?
Richard
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