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Because many have not heard of the benefits of softwashing, their first response is to either pressure wash or repaint. We would NOT recommend either option.
Although coloured render appears as durable as concrete it is not, and pressure washing is too severe a form of cleaning to clean the surface without damaging it. This damage is irreversible. You could repaint but this would be quite an expensive option because to comply with health & safety legislation scaffolding would have to be erected, it can also be difficult to get an exact colour match with the rest of your house. Ultimately and most importantly, another layer of paint only serves to mask the problem. The mould and mildew that was growing on your render would still be there merely masked by that layer of paint, in no time whatsoever it would grow through that layer of paint leaving you back where you started.