[peekeclean]

Can some one tell me why some people say about only useing a flock bristle brush on a con roof?
iv been useing a vikan flock for roofs and had to scrub away as you do,but saturday i did my brothers con roof and as its a freebe i thought im not changing my brush(medium mono brush). Only took me about 1hr 20min and one side i had to jump a neighbour fence.

So can the roof be damaged buy a stiff brush or is ther some other reason?

cheers joe