[wpclean]

This product looks really good for the cleaning of roofs, but the only downside I can see is that the cleaning effect doesn't happen immediatly, it can take a while to kick in.     How do you explain this to the customer, and do most accept this, as it is more tree hugger friendly ? 

[Smudger]

I tend to offer it as an after PW cleaning service as a preventative for the algae coming back ( not a permanent solution ) and this goes down well with the customers

I'm sure for roofs with difficult access or just algae rather than moss the customer should be happy to take your advice as the professional 

Darran