diff --git a/lca_carbon_workflow.py b/lca_carbon_workflow.py
index 54765f2..c208e87 100644
--- a/lca_carbon_workflow.py
+++ b/lca_carbon_workflow.py
@@ -40,12 +40,12 @@ class LCACarbonWorkflow:
       It puts out the results of opening and envelop emission for each
       mentioned cycle separately.
       Final results will be stored in the below attributes:
-        building_envelope_emission
-        building_opening_emission
-        building_component_emission
-        building_envelope_end_of_life_emission
-        building_opening_end_of_life_emission
-        building_component_end_of_life_emission
+        building_envelope_emission: <class 'float'>
+        building_opening_emission: <class 'float'>
+        building_component_emission: <class 'float'>
+        building_envelope_end_of_life_emission: <class 'float'>
+        building_opening_end_of_life_emission: <class 'float'>
+        building_component_end_of_life_emission: <class 'float'>
       :param city_path: Either a path to the buildings (GeoJson)
       file or the content of such a file.
       :param archetypes_catalog_file_name: Path to the buildings'
@@ -169,10 +169,25 @@ class LCACarbonWorkflow:
           self,
           building, surface, boundary, opaque_surface_code,
           density=2579):
-    """Windows have the assumed density of 2579 kg/m3
-       Window's thickness assumed the same as wall's thickness
-       These two values are being used to calculate window's workload
-       for End of Life emission evaluation."""
+    """
+      This calculates the opening emission based on the mentioned parameters.
+      The arguments come from the calculate_building_component_emission()
+      method and the output is used in the same method. So the current method
+      is hidden to the user.
+      Windows have the assumed density of 2579 kg/m3
+      Window's thickness assumed the same as wall's thickness
+      These two values are being used to calculate window's workload
+      for End of Life emission evaluation.
+      :param building: <class 'hub.city_model_structure.building.Building'>
+      :param surface: <class
+      'hub.city_model_structure.building_demand.surface.Surface'>
+      :param boundary: <class
+      'hub.city_model_structure.
+      building_demand.thermal_boundary.ThermalBoundary'>
+      :param opaque_surface_code: <class 'str'>
+      :param density: <class 'int'>
+      :return: <class 'tuple'>
+    """
     opening_emission = []
     opening_end_of_life_emission = []
     for opening in boundary.thermal_openings:
@@ -197,11 +212,11 @@ class LCACarbonWorkflow:
 
   def calculate_emission(self):
     """
-    It iterates through the city object and gives each building to the
-    calculate_building_component_emission() method. Then it unpack the results
-    of the mentioned method to the (currently six) attributes which hold the
-    final results. These attributes are mentioned in the constructor method
-    description.
+      It iterates through the city object and gives each building to the
+      calculate_building_component_emission() method. Then it unpack the results
+      of the mentioned method to the (currently six) attributes which hold the
+      final results. These attributes are mentioned in the constructor method
+      description.
     """
     for building in self.city.buildings:
       envelope_emission, opening_emission, component_emission, \