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This depends on a few factors such as the cleaning method, the roof’s size and condition, access, weather conditions, and the amount of moss and debris to remove.

As an indication, a typical 3- or 4-bedroom detached house with moderate moss growth, straightforward access in favourable weather conditions should take no more than 1-2 days to complete when using the soft wash cleaning method.

Other methods such as scraping may be even quicker, provided the roof does not have any damage or incur any during the cleaning process.

Any exterior cleaning specialist should be able to provide a reliable estimate of the timeframe required after a brief visit to the site to conduct a survey.