The Roof Cleaning Institute Of America Training & Certification Forum
"Find A Certified Roof Cleaner Directory"

What system do you have Simon and is it a 2 story roof?
you need to get some ammonx- lo to thicken your mix to reduce the run-off, there is an option of getting a lift if need be. if you look through some of the tile pics in the open side, it will give you some idea of how others are tackling jobs that may be similiar to your project in relation to size / height.

As far as the runoff issue you had, like Gary said rinse the bottom 4ft. or watch the weather and try to tailor your job to that as well it does help white tile to have the ph of the rain rinse it than hose water, believe it or not, there is some chemistry with in that. I had a tile roof that was black and hit it 3x to get it to an oyster looking color, I was stumped.. think this is not what I expected at all. about a week later w/ a good rain, drove by the job, and Bam it was sparkling white!

If you want some pics of the process, I have them. Let me know.

Kim R

Pump brand and model.

Hose size... 1/", 5/8", 3/4".

Also, what size are your tips?

Dawn works fine, but probably not quite as well as Amm-Lo.