Can anyone give me some advice about damp. I recently bought a ground floor 4 in a block flat and have realised much to my dismay that both bedrooms to the front of the house suffer from damp at skirting level. The walls are damp to touch and black powdery mould is forming on the skirting and wallpaper. I had someone out to have a look who said that the damp proof course was fine and that it was just condensation....i've did everything he said but it's still happening and seems to be getting worse. I found a rucksack that had fallen down the back of the wardrobe covered in green mould and my sons bedding gets black moulds spots on it. I have spoken to the neighbours who have no knowlegde of this problem from previous tenents and i'm now wondering if its something to do with the driveway. Prior to the house sale the front garden was chipped and below the chips is polythene sheeting as opposed to the usual breathable membrane. Could this be the issue.