Leaks and alternative visible wetness, likewise as high wetness, may also be signs of damp. Damp provides the best conditions for the expansion of mould. Dangerous Effects of damp and mould will hurt your health and residential. Even in cases once mould isn't gift, wetness will be harmful. Further health risks from excessive damp embody the expansion of microorganism, viruses, cockroaches, dust mites, and alternative pests.