I have just moved into a property that has an electric immersion heater in the hot water cylinder and is covered with a tank jacket, but it also home to a musty smell. Has anyone had this problem and what was the cure please?
Probably just stagnant air in the airing cupboard Dave. No ventilation. It will most likely go when the immersion is on and the cupboard warms up a bit.
My house had been unoccupied and un-aired for several months before I bought it. It took a few weeks to get rid of the musty smell caused by a bit of damp in the plaster.