Hello everyone, I was hoping for some advice please. I have a patch on the wall in my living room. On the other side of this wall is the kitchen. The patch on the wall doesn’t seem to be getting any bigger over a period of 10/11 months. However, it sometimes gets darker. The is a much smaller patch on the kitchen side. The kitchen has tiles down whereas the living room has carpets. I have taken the carpet and floorboards up and attached a picture of the wall directly under the damp patch.