When warm, moist air comes into contact with cooler surfaces, the moisture condenses. That is because cooler air cannot hold as much moisture as warmer air. This problem is made worse by poor or no ventilation and penetrating damp, quickly leading to black mould which can cause health issues.

Remedy ; The installation of a Positive Input Ventilation (PIV) system. This is a sophisticated whole home ventilation and condensation control unit designed to ventilate the home from a central position.