The carpet shop accross the road from me has the window cleaners in doing their roof.
At the moment they are using their reach and wash to rinse off after a good scrub with a brush.
I am thinking they would be better with something to break down the soiling first.
Here is a picture of ours.
Am I right in thinking a good soak with Sodium Hypochlorite or Sodium Percarbonate would speedthings along for them.
I want them to do ours next but can supply them with these products if its going to speed things up/cut my cost a little.
We cant do it ourselves as we are not insured for ladder/roof work anymore.