Surfaces must be sound, clean, dry and free from all defective or poorly adhering material, dirt, grease or wax. Remove all loose or defective paint or powdery
residues by thorough brushing and scraping, using a stiff fiber brush and high
pressure water jet. Treat any areas affected mould, lichens, algae and moss with
Dulux Fungicidal Wash. Make good minor defects with a suitable exterior grade
Filler. Surfaces that remain powdery, friable or chalky after thorough preparation
should be sealed with one coat of an appropriate Primer (see below). It should not
be applied on areas where moisture reading (as measured by Protimeter) exceeds
17%. These wall should be left to dry further.