Hi all,   I’m looking at the area of cladding that will sit in the window rebate and not sure what to do. Windows are alu clad Rationel and they show on their fitting instructions to leave the Compriband exposed when fitting the cladding rather than hard up against the edge of the frame.    My my issue with this, is it leaves about 8mm if a gap between the board and the end of the cill.    I like the the idea of running it up against, or even overlapping the frame b