Actually he is an absolute tosser who does not have a clue....If you follow his advice you will soon be in trouble.
I cannot even start to go into detail on here as to how to effectivly and safely start to clean a roof. There are so many variables. Spraying corrosive chemicals whilst stood on a ladder is not one of them ala Mark Cave (softwashing.uk).
i hope thats a joke as well chris. i find Mark very helpful and he does enough of it to know what he is doing.
i have watched your you tube video and you are using exactly the same methods as him? maybe he shouldnt use ladders but thats his decision . thousands of trad window cleaners will clean gutters today at the roof line on ladders same difference.
we all spray on hypo and soap and rinse it of , end of . its not brain surgery. the way you lot go on here you would think you have done a degree in chemical engineering.
and kevin i positively forbid you to come on and say honing powder no.17
john