I have black mold on a bedroom wall. I don’t know whether this is condensation, dampness or dry/wet rot. It has now appeared on the ceiling of the bedroom. There is a strong smell of dampness in the room. We are using a dehumidifier in the room, which is taking out about 5 pints of water over a three day period. My husband is physically disabled, so I will have to employ a specialist to deal with the problem; but I don’t know who to contact. could anyone give me advice?