What causes mould on inside surfaces and how can it be treated?

Mould flourishes in conditions of high humidity, poor ventilation and on surfaces with a high moisture content. Condensation or poor air circulation is normally the main culprit. It can be very destructive to paint coatings and needs to be eradicated before applying paint. Treat affected areas with Dulux Trade Weathershield Multi-Surface Fungicidal Wash. Leave for 24 hours, wash down to remove residues and allow to dry thoroughly. If necessary, repeat the treatment. Improving the ventilation and the use of mould inhibiting paints such as mouldshield will reduce further contamination.