Within TEASER\teaser\logic\archetypebuildings\tabula\de\singlefamilyhouse.py the orientation of the roof is set as follows:

    self.roof_names_1 = {
        "RooftopNorth_1": [35.0, 0.0],
        "RooftopSouth_1": [35.0, 90.0],
    }

    self.roof_names_2 = {
        "RooftopNorth_2": [35.0, 0.0],
        "RooftopSouth_2": [35.0, 90.0],

shouldn't it be 180 for south?

The desciption in rooftop.py says the following:
orientation : float [degree]
Azimuth direction of building element (0 : north, 90: east, 180: south,
270: west), orientation -1.0

Additionally, within e6_generate_building, also 180 is used.

Changing the orientation to 180, will make the following difference to the exported thermalZone records:

Orientation = 90:

tiltRoof = {0.6108652381980153, 0.6108652381980153},
aziRoof = {3.141592653589793, -1.5707963267948966},

Orientation = 180:

tiltRoof = {0.6108652381980153, 0.6108652381980153},
aziRoof = {3.141592653589793, 0.0},