I think I just need to generally improve ventilation in my house, mostly under the stairs. Windows are susceptible to condensation and subsequently, mould. It has been suggested that air bricks and/or vents could solve the problem. A survey on the house also suggested that the chimney (filled in) could be a problem - again I suspect poor ventilation. We're a semi and next door has the same problem, Silly question but: am I looking for a builder? Damp specialist?