Erm, well, surely underneath your lino will be damp and a breeding ground
for mould. Main thing is to decide where the damp is getting in, also decide
if it can be vented, Bathroom steam goes everywhere of course so its not
uncommon to find what you describe in areas not often inspected.
More ventilation of the room can do a lot to help.
Brian

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This newsgroup posting comes to you directly from...
The Sofa of Brian Gaff...

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"George Miles" wrote in message
...
There's mould on the kitchen ceiling under the bath!
I'm thinking of pulling up the floorboards,
putting down 18mm OSB3 sloped to a point
with some kind of drain.
Then covering it with Lino or similar.
Much cheaper and quicker than a wetroom kit like
https://www.screwfix.com/c/bathrooms...kit/cat8780001
Advice please
george