|direction the roof is facing; the downslope direction of the main roof face|
|Used on these elements|
|Status: in use|
|Tools for this tag|
The value should either be a cardinal direction (N, S, NW, ESE) or an angle in degree from north clockwise.
For skillion, this is the downslope direction of the roof, from the top of the roof towards its bottom. Other roofs follow the general principle illustrated below: