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.
Build attic chief architect.
If you have a half story structure you must learn to live without the auto roof build function once you have built the roof.
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.
With pro you can lock certain roof planes and perhaps leave auto roof on but it is best not to rely on that.
On the structure panel of the room specification dialog that opens lower the finished ceiling value to the height that you want the exterior.
The bottom line is this.
Repeat this process for the opposing gable wall on this floor.
Launch chief architect and open the plan in which you need to manually draw in the gable wall.
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.
Certain conditions must be met before an attic truss can be built.
If this is the case you will need to.
To manually add a gable wall.