I thought there might be a leak from the pipe leading into it and called a plumber round.
Damp wall behind washing machine. When all these items are used regularly the build up is prevented by regular washing. Puzzle out the routes of the various pipes. I havent got too close but presume it is mould.
Wall is shared with a neighbour and its in the corner of the house. As the washing machine is on the other side it might be a pipe in the floor or wall. On the wall behind the machine was mould that looked like black soot.
To clean the damp from the wall you need to get some suitable old clothes to wear and face and hand protection from the chemicals you may be using. Wall behind our fridge in the kitchen is slightly damp goes up to about 2 metres high and there is a mouldy smell in the area. Common causes of penetrating damp are.
Improve ventilation by installing a fan close to the moisture source such as over a cooker or washing machine. Then using a drywall saw cut along the line you just scored. However if we leave the house for a longer period of time it is quite common that we return to a stinky kitchen.
As we discussed in our post about how to clean mould from the washing machine drawer black mould and soap scum can build up in certain areas of your machine the detergent drawer being a key contributor to foisty damp smells. Leaking walls air gaps burst gutters and pipes porous bricks cavity wall problems andor poor cavity insulation. Take up any floor covering in both rooms and see if the floor is wet.
My washing machine smells damp That subtle musty smell of damp is probably from a build-up of mildew and mould. Moulds are likely to build up in unused sinks dishwashers and washing machines. Is it a concrete floor.