Ok, chucking with rain here this morning so went to see what's what with this job. It's pretty big!
The external glass is fairly straightforward, I would say that the panes are vary between 3-4 metres wide and 3 metres high, with a further window above that is 1 metre high. There are 6 no. of metre square windows on the sides. There is also a revolving door unit. So not too bad. This is to be done monthly. Total panels: 3 of 3x3m + 3x1m, 7 of 4x3m + 4x1m, 6 of 1x1m, revolving door unit (6 door sides, 8 curved sides, 4 door sides).
Internal cleaning is to be done 12 weekly, although should the main big windows need it they could be 4 weekly. Inside the big (3-4 metre wide) windows will have good access around them to the point where tradding them off a pointer maybe feasible. Having said that they cross piece isn't particularly hefty so I would be reluctant to put a pointer anywhere than in to a corner. I'd feel that I would do a better job than with a Vikan EasyShine or Dragonfly. However there is a mezzanine floor which overlooks the main office space and has full height windows (patio door size) running the full width of the building (16 panels!) Floor level must be 4-5 metres above the office floor. Apparently they have a fork lift with a cage which could be brought in to do them, I'd worry it would look unprofessional relying on their equipment, but I could pitch it that it would definitely enable me to do a top flight job. Total panels: 3 of 3x3m + 3x1m, 7 of 4x3m + 4x1m, 6 of 1x1m, 63 of patio door size panels, 16 of patio door size panels - high level. I would need to put some sort of dustsheet down to protect carpets etc.
I also have to quote for cleaning the fascia of the building which is also a little awkward. The top 2/3rds angles outwards at about 45 degrees, each panel must be about 2.5m including the overhang and there are 43 panels. Again this probably would be 12 weekly.
There was also talk of washing down the whole building (it's white cladding of some sort every 12 months).
The other aspect which I have to clarify is the access times, it's going to be a pretty busy office so they won't want me banging around during office hours I'm guessing...
Sorry for the long post, any ideas or guides to quoting would be appreciated!