What are these stains in ceiling and walls of porch cupboard?

Jeff543 · 17 Sep 2023

JohnD said:
Well the water stains from the roof leak are so obvious that he can't possibly be asking about them.

I was referring to the dot marks.

I thought it may be rising damp but likely just usual suspect ie the rotten felt posted about in different thread. .

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What are these stains in ceiling and walls of porch cupboard?

Jeff543

DIYnot Local

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