Now that I have had time to look at this, it seems you can not get the area for an existing wall to be removed by a new window automatically just by setting the correct renovation status (i.e. the demolished wall).
You can't (or at least I can't) get the area at all for a window if I set the criteria to look for "Existing" windows for example.
As soon as I remove the renovation criteria, I can get the area of the window - not that that helps in this situation.
It looks to me that you will have to split the wall at each side of the window and also below the window.
The piece below the window you will need to tag as "to be demolished" - the rest of the walls will be "Existing".
You can now set the criteria of your schedule to look for "element type = wall" AND "renovation status = to be demolished".
This will give you the area of the wall to be demolished.
In other words it seems that you actually have to model the walls yourself.
From what I can see, adding a new window to a wall will not give you a quantity for a demolished wall area.
You have to model the demolished wall yourself.
Unless someone else knows another way?
Barry.
One of the forum moderators.
Versions 6.5 to 27
i7-10700 @ 2.9Ghz, 32GB ram, GeForce RTX 2060 (6GB), Windows 10
Lenovo Thinkpad - i7-1270P 2.20 GHz, 32GB RAM, Nvidia T550, Windows 11