Hi there,

Although we draw all the walls with the same tool, in a Punch floorplan, we have two types of walls: exterior and interior.
The exterior walls define the perimeter of building, house, etc and these walls are contiguous (fused). This is important because this enclosed perimeter defines several parameters, as we can see in your image. The exterior walls share the mentioned parameters, so they must fused using the mouse and look as a unit (outlined in green in the image).
The interior walls are independent so they don't need to be contiguous.
Also, as you can see in your image, some zones don't show the floor => it means that the space is not defined.


Fuse.jpg (18kb) downloaded 0 time(s).

So, the short answer is that the recommended method is creating the walls in the perimeter first, and then, the interior walls.

Punch, as any program, has a learning curve. The best way to learn the program, IMO, is practice + practice + practice => Read, search and follow the User Guide (this is important) => try to create elements not related with your project, so you will become familiar with the commands and how to manage the different components.
If you are interested, my eBook for Punch V24 for Windows includes all these features, lots of tutorials, screen guides, tables, examples, rendering results as well as images.

Hope this helps.