On 16 Dec, 10:07, "Tim Downie"
wrote:
Steve Bilton wrote:
It suddently occured to me that there is a toilet vent going into the
roof space from the upstairs toilet which comes on automatically with
the light, and children being children it tends to get left on.

I think you've found the source of your damp! *Are you going to admit who
bodged it? ;-)

Tim

All I'll say is - it was like that when we bought the house... it
helps keep the unpleasant smells at bay... but for no longer!

Steve