We have recently purchased the ground floor section of a 2 story period property. After a short time of occupancy we noticed dark localised patches showing through wall paper on the inside of external wall. We have looked at the outside of the wall in the same area and con not find any obvious signs of deterioation. There is also no external dranage to mention. We have since stripped the wall paper to reveal the full extent of the dampness. It is clearly wet and there is no mould. We also note that there is localised patch work of plastering or skimming indicating that this was a pre-existing problem. We will visit upstairs to see if they have water source in the area. Apart from this can you recommend some suitable action? Do you also know if home insurance policies normally cover this type of issue. As a leaseholder we will need to consult our free holder for this information later.
Thanks in advance for the help.