Many thanks for your comments.
I've had a dehumidifier in the cellar for about a month now, i doesn't really gather any moisture as the room itself is dry as a bone.
Its just this problem in the ceiling thats a real pain.
Its been built as a wine cellar/games room and the plan was working so...
I have a damp problem in a cellar.
This problem is not the normal one i think. The walls and floor are free of all damp but i have the formation of condensation on the ceiling.
The ceiling of the cellar is constructed from a tee beam floor which forms the exterior patio above.
The ceiling...