08-02-2007, 01:24 AM
considering cheaper processes - a friend of my tells me when ever they see the roof looking a little bit dirty and a good rain will be happening that night - they typically divert the rainwater for a few hours to get rid of the leaves, dust and larger particles before they bring it back into the catchment - although this probably takes a lot more hands on control than most......another thing to consider is having screens over the gutter downspouts, but that will need periodic cleaning.