Hi, Anita. A few answers would help our detective work. Is it only the crown molding that's peeling? Is the molding wood or a kind of cast foam? Will the builder tell you what brand was used, if foam? What kind of wood and the source store, if wood? What paint contractor and what kind of paint he contracted for? Any idea what brand of paint and what the weather was like when it was painted? You will have to be very gentle in your questions at first if you expect to learn anything.