My philosophy with Archicad is 'Model it as it is built'.
But when it comes to demolition plans this doesn't always apply.
It is not quite 'real life' in that you can demolish part of a roof and add an extension.
If you have a multi-plane roof, you have to demolish and replace the entire element.
If you have single plane roofs, you can demolish and replace just the affected planes.
But you can not work on part of a roof plane, it has to be the entire element.
Same with walls, you may just want to add some more insulation and a new external cladding.
You have to demolish and replace the entire wall in Archicad (if you want it to remain as one wall).
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