hub/city_model_structure/building_demand/surface.py

@@ -18,6 +18,7 @@ from hub.city_model_structure.attributes.point import Point
 from hub.city_model_structure.greenery.vegetation import Vegetation
 from hub.city_model_structure.building_demand.thermal_boundary import ThermalBoundary
 import hub.helpers.constants as cte
+from hub.helpers.configuration_helper import ConfigurationHelper
 
 
 class Surface:
@@ -240,6 +241,8 @@ class Surface:
     The absorptance as an opaque surface, can be calculated as 1-short_wave_reflectance
     :return: float
     """
+    if self._short_wave_reflectance is None:
+      return ConfigurationHelper.short_wave_reflectance
     return self._short_wave_reflectance
 
   @short_wave_reflectance.setter