Revit room wall and opening areas.

Room Quantities.
 When it come right down to it,  what are the fundamental things you want to know about a room  space if you are going to look after it for its life?
The questions you would ask,  what am I to maintain  or replace?  So what is in the room,  the things,  and also the container itself.
Generally,  depending on its function,  the things in the room can vary greatly. A basic hallway,  walls,  ceilings,  floor, doors,  maybe a windows,  and lights and light switch,  minimum. Bathrooms,  more elements and services. An emergency ward in a hospital,  more complex still.
 The initial fundamentals are surfaces and finishes and their quantities.  Wall linings and finish,  floor structure and finish,  ceiling structure and finish.  Then openings,  doors,  windows,  basic openings,  what are they made of and what do we need to know about them to maintain them?

So how to quantify a room?
For floor area, ceiling area & perimeter & volume, place a Room and these things come through automatically.
If you have split finishes for floor, eg part vinyl, part carpet, you can always divide room using a room separator line and calling it Room A & Room B, thereby differentiating between the 2 floor finishes spaces.
But what about walls. Walls straddle rooms, so are not associated with the spaces/Rooms either side.
This is a bit of a pain if you want to do a wall take-off and know where the walls are. There is also the issue of openings in the walls that need to be subtracted.

Roombook
The "roombook"  tool was suggested. Roombook pours heaps of shared parameters into the model and exports the data into an Excel File with several tabs. It schedules everything in rooms. A nifty programme and very smart, but being able to extract the data from the Excel sheets in an automated method is not viable, but it showed that the principle worked, that wall areas could be extracted from model.
Room Finisher & Developed programme
The first crack we had at this was to get  Grant Taylor from Caduceus involved.
He suggested creating wall linings in the rooms, and then associating the wall linings with the Room.
This was done by using the