By chief architect.
Build attic chief architect.
With pro you can lock certain roof planes and perhaps leave auto roof on but it is best not to rely on that.
If this is the case you will need to.
To manually add a gable wall.
The bottom line is this.
It s easy to manually create attic walls to fill in gaps such as in gables where the program can t determine where one is needed or if you have turned off the automatic generation of attic walls.
If the design calls for the roof to be built directly off of the 1st floor walls but retain a usable attic space you will need to generate roof planes that ignore the top floor.
Launch chief architect and open the plan in which you need to manually draw in the gable wall.
Certain conditions must be met before an attic truss can be built.
You can build a cape cod or story and a half house by creating a new floor and rebuilding the roof.
To modify the area above the garage using the select objects tool click in the area or room that is above the garage on the 2nd floor to select it and click the open object edit button.
The structure should be sufficiently wide to allow for a loft and attic spaces the loft area must be on a living floor and have attic rooms on both sides separated by knee walls a flat ceiling in the loft area and a floor below steep enough roof pitch to provide appropriate ceiling height for the loft area.