hi there
the tender will require you to quote per plot, they will sometime breakdown the outside ans the inside of the windows.
the problem being now, that a lot of developers dont allow any ladder work at all, we have even had to use a tower in the past. and cherry picker.
they can be good if you like that, as you know that you will have x amount of work at a certain time in the year.
on the other hand, sticky residue left on the window once you remove the protection film. very difficult to remove, scaffold being removed prior to you getting up there to strip off the windows, turning up on site and the site not being ready, extended payment terms, etc
regards
martin sales