diff --git a/model.ifc b/model.ifc
index 93ca833..17e4096 100644
--- a/model.ifc
+++ b/model.ifc
@@ -1,7 +1,7 @@
 ISO-10303-21;
 HEADER;
 FILE_DESCRIPTION(('ViewDefinition[DesignTransferView]'),'2;1');
-FILE_NAME('model.ifc','2023-09-26T19:38:32+01:00',('',''),('',''),'IfcOpenShell 0.7.0','BlenderBIM 0.0.999999','Nobody');
+FILE_NAME('model.ifc','2023-09-26T20:28:50+01:00',('',''),('',''),'IfcOpenShell 0.7.0','BlenderBIM 0.0.999999','Nobody');
 FILE_SCHEMA(('IFC4'));
 ENDSEC;
 DATA;
@@ -34,7 +34,7 @@ DATA;
 #27=IFCGEOMETRICREPRESENTATIONSUBCONTEXT('Axis','Plan',*,*,*,*,#26,$,.GRAPH_VIEW.,$);
 #28=IFCGEOMETRICREPRESENTATIONSUBCONTEXT('Body','Plan',*,*,*,*,#26,$,.PLAN_VIEW.,$);
 #29=IFCGEOMETRICREPRESENTATIONSUBCONTEXT('Annotation','Plan',*,*,*,*,#26,$,.PLAN_VIEW.,$);
-#30=IFCSITE('3TeIomf_H5ihZWpUnlKDgn',$,'My Site',$,$,#53,$,$,$,$,$,$,$,$);
+#30=IFCSITE('3TeIomf_H5ihZWpUnlKDgn',$,'My Site',$,$,#53,$,$,$,(53,23,0),(1,28,0),75.,$,$);
 #36=IFCBUILDING('38W$Eao9r2AB7xNZTBqkF2',$,'62 Brown Street',$,$,#59,$,$,$,$,$,$);
 #42=IFCBUILDINGSTOREY('1TvD1sNbj7E96uzCmOlvbG',$,'Ground Floor',$,$,#65,$,$,$,$);
 #48=IFCRELAGGREGATES('1TDB2PvWn8WfozpaD8RFmu',$,$,$,#1,(#30));
@@ -56,11 +56,12 @@ DATA;
 #64=IFCAXIS2PLACEMENT3D(#61,#62,#63);
 #65=IFCLOCALPLACEMENT(#59,#64);
 #66=IFCMATERIAL('Brick',$,$);
+#67=IFCPROPERTYSINGLEVALUE('ThermalConductivityTemperatureDerivative',$,IFCREAL(0.8),$);
+#68=IFCMATERIALPROPERTIES('Pset_MaterialEnergy',$,(#67),#66);
 #817=IFCWALLTYPE('1fGdStwpf5RvhdgaFzc1VC',$,'External wall metric',$,$,$,$,$,$,.STANDARD.);
 #819=IFCMATERIALLAYERSET((#821),'solid brick 225',$);
 #820=IFCRELASSOCIATESMATERIAL('2UzZHJwaXChfAfKhYuqKSl',$,$,$,(#817),#819);
 #821=IFCMATERIALLAYER(#66,0.224999994039536,$,$,$,$,$);
-#823=IFCMATERIAL('Cavity',$,$);
 #825=IFCWALL('3nNHSYg1TEPhGR3j0h9fp7',$,'Wall',$,$,#5184,#833,$,$);
 #826=IFCRELCONTAINEDINSPATIALSTRUCTURE('1AIiugDf11qOSAqgsCSoIS',$,$,$,(#825,#883,#3036,#3506,#4603,#4749,#4847,#4886,#5480,#5744,#5844,#5875,#5913,#6096,#6178,#6312,#6366,#7413,#8594,#9061,#10125,#10556,#10983,#11135,#11202,#11310,#11377,#11838,#12473,#13011,#13523,#14190,#14404,#14487,#14535,#14567,#14681,#14756,#15127,#17134,#17167,#19574,#7828,#8783,#8682,#8621,#20272,#22249,#22309,#22359,#28059,#28082,#28135,#28163),#42);
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@@ -7249,5 +7250,253 @@ DATA;
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 ENDSEC;
 END-ISO-10303-21;