Above my kitchen is a flat roof. The flat roof has been replaced as it was leaking but I am still getting damp patches on the wall. The person who replaced the ceiling says that it is the old plaster releasing the old water but the ceiling was replaced a year ago and it gets worse when it rains in different places. The majoirty of the patches are in the middle of the wall with some at the top of join with the ceiling.
I have no idea what to do next!
Thanks