Revit :: Interlocking Floor And Wall Layers At Junction?

How to accomplish, and I've searched various places, is how to have a layered floor structure dovetail into a layered wall construction.
 
I have a cavity wall construction with inner leaf of blockwork - and an intermediate floor slab - concrete precast slabs with insulation and screed on.
 
The construction in Revit defaults to the whole floor structure finishing at the internal face of the wall. I need the slab layer of the floor to project into the inner blockwork, whilst having the other floor construction layers finishing flush with the wall. This needs to occur at the support end of the slab only rather than around the whole floor perimeter.
 
I'm working on a single wall type spanning ground floor up to the underside of the roof - should I be using separate walls for each floor ? (I read somewhere that it is advisable to break wall types by floor as costs may be different).