We have just bought a very old, tiny stone cottage which used to be a stable. My daughter's room is at one end of the house. The thick stone, gable wall has been cemented over (there's no way we can remove this). Inside her room, this wall suffers terribly from condensation problems. In winter beads of water coat the walls, even with ventilating the room and heating. Unfortunately we have lpg gas (no choice) which costs a fortune. It is far too expensive to leave the heating on low all night in the winter to keep the wall dry. I'm really worried about my daughter sleeping in this wet, damp room. What could we do to this wall to stop this massive condensation problem? The walls are incredibly thick - typical of a stable/building built in the 1800s. Would insulating the wall alleviate this? The existing plaster on this wall is bulging, crumbly and soft - obviously from being constantly wet every winter. Any advice would be greatly appreciated, thank you!