Upstand VCL - Help!

[HHHAMSTA]

Hi All

 

My "roofer", after being recommended by a friend, did a pretty shoddy job all round, I won't go into all the details, but ultimate it doesn't leak which is one thing.

 

I'm doing the internal finishes myself though noticed the VCL's don't run internally under the upstand or all the way up the outside of the upstand (both of which seem to be available details on the web).  In places these don't cover the entirety of the insulation.  The skylight frame is insulated.  I'd like to insulate the upstands as the roof line at the lower end is very close to the top of the upstand.  I've checked the forums for similar queries though no concrete advice.  Obviously taking the roof up and relaying is out the question. 

 

 

I plan to tape over any visible insulation gaps, connecting the VCL to the upstand.  If I then PIR the upstand, how to then finish with a vapour barrier.  Will foil taping the PIR in place from front and taping over any gaps accessible from the ceiling suffice, or should I extend the VCL further up the inside of the rooflight frame?  Any other considerations please?

 

Thanks in advance to anyone taking time out of their day to help a man in need!