I did a Con roof yesterday and one today and I used a new brush.
Absoultley Fantastic. I could not belive how good it is. Been back today to have a look at the one I did yesterday. Brilliant, the customers are over the moon.
I will post a pic below, I came across it by accident, I have thought about useing on glass for normall wfp but have not tried it yet, But for con roofs it blows everything else out of the water. I used to use the normal 10" vikan, not anymore.
Its a vikan brush with very short bristles, I think it a floor brush normally so the bristles are a bit stiffer, but it shreds moss and lichen before your eyes.
Heres the pic, Nel