Dream about mould is all about instincts and responsibilities. Perhaps you should trust what your instincts are trying to tell you. You will suddenly feel the need to become independent and totally free. Some responsibility you acquired in the past no longer interests you.
Dream about black mould aligns with thoughts. You have a large ego or think overly highly of yourself. In this case, objectivity will make you a perfect ally to make things clear. It would be good for you to open your mind to the new possibilities that are presenting themselves in your life.
Efforts are uncovered through a dream about mould on walls. You are putting up a front instead of being your true self. It will be very good for you to improve your closet or to make a pleasure trip. Perhaps it is more enriching to share that time of leisure in another way to which you are accustomed. Try to put a smile on your face, despite what you are thinking.