Can anyone help me please? We recently bought an old house with a kitchen extension. Our left hand kitchen wall is an external wall, and forms our neighbour's right hand garden wall. The wall is very wet internally, and when it rains the plaster gets wet and falls off the wall and the bottom of the ceiling connected to it. After asking several puzzled roofers to identify the problem, they all confirmed there is nothing wrong with our roof. Eventually an excellent mason we employed said that there was cracked concrete render on the outside of the wall letting the water in and trapping it. As it is a solid wall, the water had nowhere to go but into our kitchen and up into the lower part of the ceiling. He took the old render off and replaced it with lime render to let the wall breathe. We have a damp proof course in the bottom of the wall. The wall still gets wet when it rains, but now it dries out more quickly afterwards. A plasterer who subsequently looked at the wall said that the plaster on the wall is salt damaged and so has become very absorbent to water, so it will get wet for evermore and will need to be replaced. So we're going to hack off all the old internal plaster this weekend, and use a dehimidifier to dry out the kitchen. We have also been advised by a damp proof guy to tank the wall up to the ceiling with damp proof plaster, but as it's a solid wall and needs to breathe, I'd prefer to find another way of curing the damp if I can. I have read that damp proofing walls can often just move the damp elsewhere, and we don't want to push the damp any further up the ceiling or further into our house. So I'm wondering this. Would it be enough to take of the plaster, dry out the wall with a dehumifier, then paint the brick with salt neutraliser (to stop the salts coming back through to the new plaster), then get the wall replastered just with ordinary plaster? This is getting more technical than we expected when we bought the house, so any advice would be gratefully received:-;