diff --git a/helpers/idf_helper.py b/helpers/idf_helper.py
index e001f679..1218f05b 100644
--- a/helpers/idf_helper.py
+++ b/helpers/idf_helper.py
@@ -92,18 +92,6 @@ class IdfHelper:
     schedule_occupancy.Hour_23 = occupancy.occupant_schedule[22]
     schedule_occupancy.Hour_24 = occupancy.occupant_schedule[23]
 
-  def add_material(self, layer):
-    materials = self._idf.newidfobject("MATERIAL".upper())
-    materials.Name = layer.material.name
-    materials.Roughness = cte.roughness
-    materials.Thickness = layer.thickness
-    materials.Conductivity = layer.material.conductivity
-    materials.Density = layer.material.density
-    materials.Specific_Heat = layer.material.specific_heat
-    materials.Thermal_Absorptance = layer.material.thermal_absorptance
-    materials.Solar_Absorptance = layer.material.solar_absorptance
-    materials.Visible_Absorptance = layer.material.visible_absorptance
-
   def _add_construction(self, thermal_boundary):
     for construction in self._idf.idfobjects[self._CONSTRUCTION]:
       if construction.Name == thermal_boundary.construction_name: