Damp can be caused by blocked cavities. At present the majority of damp issues we are coming across relate to having cavity wall insulation installed incorrectly at your property.
Mould issues can be caused by blocked cavities. But again a high percentage of mould issues we are coming across relate to cavity wall insulation.
Condensation build up is caused by air flow problems for example if your air vents are blocked or not functioning correctly then this can be the cause of condensation at your property.