Edging a corrugated steel roof (and fitting Veluxes)

[jimrp]

Hi all,

My love shack is coming on nicely (its an old greenhouse, half of which I'm keeping as a greenhouse, the other half will be a home office/shed, pics attached). I have a couple of points around fitting the roof which I'd like some wisdom/thoughts on.
- Roof is OSB covered in foil I've got corrugated steel to cover it (1 inch deep/8cm wide wibbles)
- there are 2 velux windows in the roof

What do I do at the ends of the roof (see pics - specifically where the corrugated steel changes to glass) - one of:
- dangle the steel over the glass slightly
- build a wooden ending between the steel and the glass that goes up and over the steel
(see pics)

How to seal the veluxes (these are skip finds, I have no flashing kit but do have flashing tape, sorry no artists impressions for this one)
- current plan is to try to snuggle the steel up against the window to catch water off the window straight onto the steel.
- Plan B is to leave a gap around the window and use flashing tape to fashion a border to divert water around the window onto the steel below the window (ie a flashing kit made of flashing tape)

Any ideas gratefully recieved.

thanks,

Jim
Bristol