I don't mind working in cold weather but when it's -7 your asking 4 trouble. There too window cleaners on my street do it the traditional way and its taken then easy an 30 mins to clean 1 house to me they might aswell throw towel in and go home :-))
We're trad, and every year we get extreme cold spells here in the Fatherland
We can trad down to about minus 6 to minus 8 depending on a few factors like wind etc. When there's snow, we clean only the downstairs and charge a few €'s less. Everyone seems happy with this. had a few comments about being nuts to work in this cold etc, but most comment about how good it is to see us and we get more tea's and coffees because they must feel sorry for us!!!
M & M, I don't expect custies to understand that we need to work. They just see if the windows are dirty. If you manage to pay your bills doesn't interest them, and why should it? I don't care if my postman has enough to get by. It's his job, if he can't work, what's that got to do with me? Window cleaning isn't life and death, if you dump them because they're not bothered about your bills, they'll get someone else to clean the windows. Or is there a shortage of WC's in UK?