It is very important to remove and treat any mould with an appropriate mould killer.

A furry growth of micro-organisms, mould ( a fungus ), often grows in warm moist conditions.  All traces of mould must be removed if it is found during surface preparation.  The mould can quickly re-establish itself beneath a surface coating if it is not completely removed, which can then lead to an early failure of that coating.

Follow this procedure to remove mould growth:

1. To remove the possibility of spreading the mould to other areas the mould will first need to be made wet.  Simply use a spray bottle with water or a spray bottle with a mould killing fungicide.
2. Use a scraper or wire brush to remove any heavy patches.
3. Apply a fungicidal wash to the damaged areas and let it dry.
4. If possible, the affected area should be left for a week or so and re-treated if the mould reappears.                    

Because the fungicidal wash has a residual effect on the surface, meaning the traces of it remain, it will continually remove mould growth from the surface, sometimes for many years.

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