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ref. standing on bays of flats below:
1 - are they loadbearing?
2 - low parapet is an inviting trip hazard; falls from about 8-9 feet up invariably end up with a head/ground impact, with associated mortality
so, advice would be to check loadbearing ness of the roof - (send mrs greenbank out to check this...)
and, tie a clothes line round your waist and fasten the other end to something heavy (possibly mrs greenbank...)
rive_gauche-
Yup, they're load bearing, I (and workmen) have been out on them loads of times. I'll use a board to spread the load but there are plenty of times when I haven't.
No parapet wall at the front, it's a flat roof on those bays. At the back it's a low parapet wall (2ft high), but it's 20ft up with paving slabs below, but I can do 99% of the work from the inside on those.
Greenbank
Heat gun not required for the front window sills as most of the paint has come off already, so it's just a job for a wire brush.
Some of the ones at the back will require getting paint off, but I was just going to do the front ones first and see how those go. Heat gun link noted for when/if I get around to the back ones.
Scaffolding not required for the majority of it as I can get to the front windows by standing on the roof of the bays of the flat below. One small sill I'll have to use a ladder to get the paint right underneath but I can do most of the work from the inside now that we've had new windows fitted and they open nicely.
At the back I've got 6 window sills, 3 of which I can get to standing on the roof of the bay of the flat below. 2 others are sash windows, so I hope can do it all from inside (bathroom and kitchen). The last one is the toilet window which is a uPVC casement window that'll be a git to work around as it doesn't open fully. No chance of doing that one with a ladder either as it's above a sloping roof extension of the kitchen downstairs, I'll probably do what I can and leave it for a time that we (or the flat above) ever put up scaffolding.
Definitely a job for a nice summers day.