diff --git a/lca_carbon_workflow.py b/lca_carbon_workflow.py
index aee5baa..7e01603 100644
--- a/lca_carbon_workflow.py
+++ b/lca_carbon_workflow.py
@@ -72,7 +72,6 @@ class LCACarbonWorkflow:
       boundary_envelope_emission = []
       boundary_opening_emission = []
 
-
       for boundary in surface.associated_thermal_boundaries:
         opening_emission = None
         layer_emission = self._calculate_envelope_emission(boundary)
@@ -99,10 +98,12 @@ class LCACarbonWorkflow:
     layer_emission = []
     for layer in boundary.layers:
       if not layer.no_mass:
+        layer_material = \
+         self.nrcan_catalogs.search_materials(layer.material_name)
         layer_emission.append(EnvelopeEmission(
-          self.nrcan_catalogs.search_materials(
-            layer.material_name)['embodied_carbon'],
+          layer_material['embodied_carbon'],
           boundary.opaque_area, layer.thickness).calculate_envelope_emission())
+        layer_workload = boundary.opaque_area * layer.thickness *  layer_material['density']
     return layer_emission
 
   def _calculate_opening_emission(