Stuart m,
It depends on your views, i personally do not go out of my way to take work from another window cleaner, i just do a good job and if asked, then i provide a quote, but that's me.
I have always had the same view since i started, but obviously now there are more and more window cleaners, and the bulk of that can be put down that there are waterfed poles where some people wouldn't want to climb a ladder, so its a lot easier in that respect.
Stuart m,
Amongst a lot of window cleaners in the north west, and window cleaners that have been at it a while in the north west, there actually is an unwritten code.