Hi all, New to the forum but I have used your great advise many a times, thank you for it all. I have a question on window sills. Basically, the end goal is to have a solid natural stone inside sill (new part of the house, double skin block). Do you A) Use one big piece of stone to go across the full wall and sit the window on that. (My only hesitation here is that the stone would be flat on the outside part with no rain relief). Or B) Do I set the window on a separate stone cast sill with the built-in relief etc. And then install a natural stone sill on the inside to butt up against the cast stone? Thanks in advance everyone!