Exterior
Decorating
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Step: 1 Remove all loose
paint and dirt with a stiff brush. This can be a messy job, so wear eye
protectors and a gauze face mask.
Step: 2 Treat
mould growth with a fungicide - leave it on for 24 hours and then wash the wall
thoroughly with clean water. Scrape thick growths of mould from the wall with a
wooden or plastic spatula. Then treat the masonry with fungicide, as in Step 2
above, and let the masonry dry thoroughly.
Step: 3 Fill
cracks and holes in a rendered wall with fresh cement containing a little PVA
bonding agent to help it stick to the masonry.
Step: 4 Paint powdery or chalky surfaces with a
stabilising primer to bind the loose material to the wall.
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